From 3f860c6d6d34a85e7e712f696959d902a6f24266 Mon Sep 17 00:00:00 2001
From: Brian <brianfransis.moniaga@gmail.com>
Date: Thu, 28 Nov 2024 22:46:03 -0700
Subject: [PATCH 01/13] Draft riscv-opcodes generator

---
 opcodes_maker/generate_instr_dict.py |   148 +
 opcodes_maker/instr_dict.json        | 15446 +++++++++++++++++++++++++
 opcodes_maker/sorter.py              |    28 +
 3 files changed, 15622 insertions(+)
 create mode 100644 opcodes_maker/generate_instr_dict.py
 create mode 100644 opcodes_maker/instr_dict.json
 create mode 100644 opcodes_maker/sorter.py

diff --git a/opcodes_maker/generate_instr_dict.py b/opcodes_maker/generate_instr_dict.py
new file mode 100644
index 000000000..3560cbb93
--- /dev/null
+++ b/opcodes_maker/generate_instr_dict.py
@@ -0,0 +1,148 @@
+from typing import List, Dict
+import os
+import yaml
+import json
+
+
+def range_size(range_str: str) -> int:
+    try:
+        end, start = map(int, range_str.split('-'))
+        return abs(end - start) + 1
+    except ValueError:
+        return 0;
+
+reg_names = {'qs1', 'qs2', 'qd',
+             'fs1', 'fs2', 'fd'}
+
+def GetVariables(vars: List[Dict[str, str]]):
+    var_names = []
+    for var in vars:
+        var_name = var['name']
+        if var_name in reg_names:
+            # Since strings are immutable.
+            lst_var_name = list(var_name)
+            lst_var_name[0] = 'r'
+            var_name = "".join(lst_var_name)
+        elif var_name == "shamt":
+            size = range_size(var['location'])
+            if size == 5:
+                var_name = "shamtw"
+            elif size == 6:
+                var_name = "shamtd"
+        var_names.append(var_name)
+    var_names.reverse()
+
+    return var_names
+
+def BitStringToHex(bit_str: str) -> str:
+    new_bit_str = ""
+    for bit in bit_str:
+        if bit == '-':
+            new_bit_str += '0'
+        else:
+            new_bit_str += bit
+    return hex(int(new_bit_str, 2))
+
+def GetMask(bit_str: str) -> str:
+    mask_str = ""
+    for bit in bit_str:
+        if bit == '-':
+            mask_str += '0'
+        else:
+            mask_str += '1'
+    return hex(int(mask_str, 2))
+
+def GetExtension(ext, base):
+    prefix = f'rv{base}_'
+    final_extensions = []
+
+    if isinstance(ext, str):
+        final_extensions.append(prefix + ext.lower())
+    elif isinstance(ext, dict):
+        for _, extensions in ext.items():
+            for extension in extensions:
+                final_extensions.append(prefix + extension.lower())
+            final_extensions.reverse()
+
+    return final_extensions
+
+def find_first_match(data):
+    if isinstance(data, dict):
+        for key, value in data.items():
+            if key == "match":
+                return value
+            elif isinstance(value, (dict, list)):
+                result = find_first_match(value)
+                if result is not None:
+                    return result
+    elif isinstance(data, list):
+        for item in data:
+            result = find_first_match(item)
+            if result is not None:
+                return result
+    return ""
+
+def GetEncodings(enc: str):
+    n = len(enc)
+    if n < 32:
+        return '-' * (32-n) + enc
+    return enc
+
+def convert(file_dir: str, json_out):
+    with open(file_dir, 'r') as file:
+        data = yaml.safe_load(file)
+        instr_name = data['name'].replace('.', '_')
+
+        print(instr_name)
+        encodings = data['encoding']
+         
+        # USE RV_64
+        rv64_flag = False
+        if 'RV64' in encodings:
+            encodings = encodings['RV64']
+            rv64_flag = True
+        enc_match = GetEncodings(encodings['match'])
+
+        var_names = []
+        if 'variables' in encodings:
+            var_names = GetVariables(encodings['variables'])
+
+        extension = []
+        prefix = ""
+        if rv64_flag:
+            prefix = "64"
+        if "base" in data:
+            extension = GetExtension(data["definedBy"], data["base"])
+        else:
+            extension = GetExtension(data["definedBy"], prefix) 
+
+        match_hex = BitStringToHex(enc_match)
+        match_mask = GetMask(enc_match)
+
+        json_out[instr_name] = {
+            "encoding": enc_match,
+            "variable_fields": var_names,
+            "extension": extension,
+            "match": match_hex,
+            "mask": match_mask
+        }
+
+def read_yaml_insts(path: str):
+    yaml_files = []
+    for root, _, files in os.walk(path):
+        for file in files:
+            if file.endswith('.yaml') or file.endswith('.yml'):
+                yaml_files.append(os.path.join(root, file))
+    return yaml_files
+
+def main():
+    directory = "../arch/inst/"
+    insts = read_yaml_insts(directory)
+    
+    inst_dict = {}
+    with open('data.json', 'w') as outfile:
+        for inst_dir in insts:
+            convert(inst_dir, inst_dict)
+        json.dump(inst_dict, outfile, indent=4)
+main()
+
diff --git a/opcodes_maker/instr_dict.json b/opcodes_maker/instr_dict.json
new file mode 100644
index 000000000..61d282169
--- /dev/null
+++ b/opcodes_maker/instr_dict.json
@@ -0,0 +1,15446 @@
+{
+  "vsm3c_vi": {
+    "encoding": "1010111----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "zimm5",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvksh",
+      "rv_zvks"
+    ],
+    "match": "0xae002077",
+    "mask": "0xfe00707f"
+  },
+  "vsm3me_vv": {
+    "encoding": "1000001----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvksh",
+      "rv_zvks"
+    ],
+    "match": "0x82002077",
+    "mask": "0xfe00707f"
+  },
+  "vsm4k_vi": {
+    "encoding": "1000011----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "zimm5",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvksed",
+      "rv_zvks"
+    ],
+    "match": "0x86002077",
+    "mask": "0xfe00707f"
+  },
+  "vsm4r_vv": {
+    "encoding": "1010001-----10000010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvksed",
+      "rv_zvks"
+    ],
+    "match": "0xa2082077",
+    "mask": "0xfe0ff07f"
+  },
+  "vsm4r_vs": {
+    "encoding": "1010011-----10000010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvksed",
+      "rv_zvks"
+    ],
+    "match": "0xa6082077",
+    "mask": "0xfe0ff07f"
+  },
+  "vsha2ms_vv": {
+    "encoding": "1011011----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvknha",
+      "rv_zvknhb",
+      "rv_zvkn"
+    ],
+    "match": "0xb6002077",
+    "mask": "0xfe00707f"
+  },
+  "vsha2ch_vv": {
+    "encoding": "1011101----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvknha",
+      "rv_zvknhb",
+      "rv_zvkn"
+    ],
+    "match": "0xba002077",
+    "mask": "0xfe00707f"
+  },
+  "vsha2cl_vv": {
+    "encoding": "1011111----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvknha",
+      "rv_zvknhb",
+      "rv_zvkn"
+    ],
+    "match": "0xbe002077",
+    "mask": "0xfe00707f"
+  },
+  "vaesdf_vv": {
+    "encoding": "1010001-----00001010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa200a077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesdf_vs": {
+    "encoding": "1010011-----00001010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa600a077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesdm_vv": {
+    "encoding": "1010001-----00000010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa2002077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesdm_vs": {
+    "encoding": "1010011-----00000010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa6002077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesef_vv": {
+    "encoding": "1010001-----00011010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa201a077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesef_vs": {
+    "encoding": "1010011-----00011010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa601a077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesem_vv": {
+    "encoding": "1010001-----00010010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa2012077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesem_vs": {
+    "encoding": "1010011-----00010010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa6012077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaesz_vs": {
+    "encoding": "1010011-----00111010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xa603a077",
+    "mask": "0xfe0ff07f"
+  },
+  "vaeskf1_vi": {
+    "encoding": "1000101----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "zimm5",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0x8a002077",
+    "mask": "0xfe00707f"
+  },
+  "vaeskf2_vi": {
+    "encoding": "1010101----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "zimm5",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkned",
+      "rv_zvkn"
+    ],
+    "match": "0xaa002077",
+    "mask": "0xfe00707f"
+  },
+  "vgmul_vv": {
+    "encoding": "1010001-----10001010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkg"
+    ],
+    "match": "0xa208a077",
+    "mask": "0xfe0ff07f"
+  },
+  "vghsh_vv": {
+    "encoding": "1011001----------010-----1110111",
+    "variable_fields": [
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvkg"
+    ],
+    "match": "0xb2002077",
+    "mask": "0xfe00707f"
+  },
+  "vfwmaccbf16_vv": {
+    "encoding": "111011-----------001-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvfbfwma"
+    ],
+    "match": "0xec001057",
+    "mask": "0xfc00707f"
+  },
+  "vfwmaccbf16_vf": {
+    "encoding": "111011-----------101-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvfbfwma"
+    ],
+    "match": "0xec005057",
+    "mask": "0xfc00707f"
+  },
+  "vfncvtbf16_f_f_w": {
+    "encoding": "010010------11101001-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvfbfmin"
+    ],
+    "match": "0x480e9057",
+    "mask": "0xfc0ff07f"
+  },
+  "vfwcvtbf16_f_f_v": {
+    "encoding": "010010------01101001-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvfbfmin"
+    ],
+    "match": "0x48069057",
+    "mask": "0xfc0ff07f"
+  },
+  "vclmul_vv": {
+    "encoding": "001100-----------010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbc",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x30002057",
+    "mask": "0xfc00707f"
+  },
+  "vclmul_vx": {
+    "encoding": "001100-----------110-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbc",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x30006057",
+    "mask": "0xfc00707f"
+  },
+  "vclmulh_vv": {
+    "encoding": "001101-----------010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbc",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x34002057",
+    "mask": "0xfc00707f"
+  },
+  "vclmulh_vx": {
+    "encoding": "001101-----------110-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbc",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x34006057",
+    "mask": "0xfc00707f"
+  },
+  "vandn_vv": {
+    "encoding": "000001-----------000-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x4000057",
+    "mask": "0xfc00707f"
+  },
+  "vandn_vx": {
+    "encoding": "000001-----------100-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x4004057",
+    "mask": "0xfc00707f"
+  },
+  "vbrev_v": {
+    "encoding": "010010------01010010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x48052057",
+    "mask": "0xfc0ff07f"
+  },
+  "vbrev8_v": {
+    "encoding": "010010------01000010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x48042057",
+    "mask": "0xfc0ff07f"
+  },
+  "vrev8_v": {
+    "encoding": "010010------01001010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x4804a057",
+    "mask": "0xfc0ff07f"
+  },
+  "vclz_v": {
+    "encoding": "010010------01100010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x48062057",
+    "mask": "0xfc0ff07f"
+  },
+  "vctz_v": {
+    "encoding": "010010------01101010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x4806a057",
+    "mask": "0xfc0ff07f"
+  },
+  "vcpop_v": {
+    "encoding": "010010------01110010-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x48072057",
+    "mask": "0xfc0ff07f"
+  },
+  "vrol_vv": {
+    "encoding": "010101-----------000-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x54000057",
+    "mask": "0xfc00707f"
+  },
+  "vrol_vx": {
+    "encoding": "010101-----------100-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x54004057",
+    "mask": "0xfc00707f"
+  },
+  "vror_vv": {
+    "encoding": "010100-----------000-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x50000057",
+    "mask": "0xfc00707f"
+  },
+  "vror_vx": {
+    "encoding": "010100-----------100-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x50004057",
+    "mask": "0xfc00707f"
+  },
+  "vror_vi": {
+    "encoding": "01010------------011-----1010111",
+    "variable_fields": [
+      "zimm6hi",
+      "vm",
+      "vs2",
+      "zimm6lo",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0x50003057",
+    "mask": "0xf800707f"
+  },
+  "vwsll_vv": {
+    "encoding": "110101-----------000-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "vs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
+    "match": "0xd4000057",
+    "mask": "0xfc00707f"
+  },
+  "vwsll_vx": {
+    "encoding": "110101-----------100-----1010111",
+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
+    ],
+    "extension": [
+      "rv_zvbb",
+      "rv_zvks",
+      "rv_zvkn"
+    ],
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vd"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+  "vadd_vi": {
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+    "variable_fields": [
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+      "simm5",
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+    "extension": [
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+    "match": "0x3057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc0ff07f"
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+    "mask": "0xfc0ff07f"
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+      "vs1",
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+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
+      "vd"
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+    "match": "0xbc002057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs2",
+      "vs1",
+      "vd"
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+    "match": "0xc0002057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
+      "vd"
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+    "match": "0xc4002057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs2",
+      "vs1",
+      "vd"
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+    "extension": [
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+    "match": "0xc8002057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
+      "vd"
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+    "match": "0xcc002057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs2",
+      "vs1",
+      "vd"
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+    "match": "0xd0002057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs2",
+      "vs1",
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+    "match": "0xd4002057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
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+    "mask": "0xfc00707f"
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+      "vs1",
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs1",
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "match": "0xf0002057",
+    "mask": "0xfc00707f"
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+    "match": "0xf4002057",
+    "mask": "0xfc00707f"
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "mask": "0xfc00707f"
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+      "rs1",
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "match": "0x28006057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vd"
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+    "extension": [
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "mask": "0xfff0707f"
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+    "variable_fields": [
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+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "match": "0x3c006057",
+    "mask": "0xfc00707f"
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+  "vdivu_vx": {
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+      "rs1",
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+    "match": "0x80006057",
+    "mask": "0xfc00707f"
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+    "match": "0x84006057",
+    "mask": "0xfc00707f"
+  },
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+    "match": "0x88006057",
+    "mask": "0xfc00707f"
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+    "match": "0x8c006057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "match": "0x90006057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "rs1",
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+    "match": "0x94006057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+    "extension": [
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+    "match": "0x98006057",
+    "mask": "0xfc00707f"
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+  "vmulh_vx": {
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0x9c006057",
+    "mask": "0xfc00707f"
+  },
+  "vmadd_vx": {
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+    "variable_fields": [
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+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xa4006057",
+    "mask": "0xfc00707f"
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+  "vnmsub_vx": {
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xac006057",
+    "mask": "0xfc00707f"
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+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xb4006057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "match": "0xbc006057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xc0006057",
+    "mask": "0xfc00707f"
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+  "vwadd_vx": {
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xc4006057",
+    "mask": "0xfc00707f"
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+  "vwsubu_vx": {
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+    "variable_fields": [
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+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xc8006057",
+    "mask": "0xfc00707f"
+  },
+  "vwsub_vx": {
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+    "variable_fields": [
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+      "vs2",
+      "rs1",
+      "vd"
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+    "match": "0xcc006057",
+    "mask": "0xfc00707f"
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+    "variable_fields": [
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+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xd0006057",
+    "mask": "0xfc00707f"
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+  "vwadd_wx": {
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+    "variable_fields": [
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+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xd4006057",
+    "mask": "0xfc00707f"
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+  "vwsubu_wx": {
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+    "variable_fields": [
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+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xd8006057",
+    "mask": "0xfc00707f"
+  },
+  "vwsub_wx": {
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+    "variable_fields": [
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+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xdc006057",
+    "mask": "0xfc00707f"
+  },
+  "vwmulu_vx": {
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+    "variable_fields": [
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+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xe0006057",
+    "mask": "0xfc00707f"
+  },
+  "vwmulsu_vx": {
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+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xe8006057",
+    "mask": "0xfc00707f"
+  },
+  "vwmul_vx": {
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+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xec006057",
+    "mask": "0xfc00707f"
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+  "vwmaccu_vx": {
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+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xf0006057",
+    "mask": "0xfc00707f"
+  },
+  "vwmacc_vx": {
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+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xf4006057",
+    "mask": "0xfc00707f"
+  },
+  "vwmaccus_vx": {
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+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xf8006057",
+    "mask": "0xfc00707f"
+  },
+  "vwmaccsu_vx": {
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+    "variable_fields": [
+      "vm",
+      "vs2",
+      "rs1",
+      "vd"
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+    "extension": [
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+    "match": "0xfc006057",
+    "mask": "0xfc00707f"
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+    "mask": "0xf800707f"
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+  "amoadd_w": {
+    "encoding": "00000------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0x202f",
+    "mask": "0xf800707f"
+  },
+  "amoxor_w": {
+    "encoding": "00100------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0x2000202f",
+    "mask": "0xf800707f"
+  },
+  "amoand_w": {
+    "encoding": "01100------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0x6000202f",
+    "mask": "0xf800707f"
+  },
+  "amoor_w": {
+    "encoding": "01000------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0x4000202f",
+    "mask": "0xf800707f"
+  },
+  "amomin_w": {
+    "encoding": "10000------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0x8000202f",
+    "mask": "0xf800707f"
+  },
+  "amomax_w": {
+    "encoding": "10100------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0xa000202f",
+    "mask": "0xf800707f"
+  },
+  "amominu_w": {
+    "encoding": "11000------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0xc000202f",
+    "mask": "0xf800707f"
+  },
+  "amomaxu_w": {
+    "encoding": "11100------------010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv_a"
+    ],
+    "match": "0xe000202f",
+    "mask": "0xf800707f"
+  },
+  "sha512sum0": {
+    "encoding": "000100000100-----001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zknh",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x10401013",
+    "mask": "0xfff0707f"
+  },
+  "sha512sum1": {
+    "encoding": "000100000101-----001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zknh",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x10501013",
+    "mask": "0xfff0707f"
+  },
+  "sha512sig0": {
+    "encoding": "000100000110-----001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zknh",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x10601013",
+    "mask": "0xfff0707f"
+  },
+  "sha512sig1": {
+    "encoding": "000100000111-----001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zknh",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x10701013",
+    "mask": "0xfff0707f"
+  },
+  "aes64esm": {
+    "encoding": "0011011----------000-----0110011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zkne",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x36000033",
+    "mask": "0xfe00707f"
+  },
+  "aes64es": {
+    "encoding": "0011001----------000-----0110011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zkne",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x32000033",
+    "mask": "0xfe00707f"
+  },
+  "aes64dsm": {
+    "encoding": "0011111----------000-----0110011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zknd",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x3e000033",
+    "mask": "0xfe00707f"
+  },
+  "aes64ds": {
+    "encoding": "0011101----------000-----0110011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zknd",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x3a000033",
+    "mask": "0xfe00707f"
+  },
+  "aes64ks1i": {
+    "encoding": "00110001---------001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rnum"
+    ],
+    "extension": [
+      "rv64_zknd",
+      "rv64_zkne",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x31001013",
+    "mask": "0xff00707f"
+  },
+  "aes64im": {
+    "encoding": "001100000000-----001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zknd",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x30001013",
+    "mask": "0xfff0707f"
+  },
+  "aes64ks2": {
+    "encoding": "0111111----------000-----0110011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zknd",
+      "rv64_zkne",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x7e000033",
+    "mask": "0xfe00707f"
+  },
+  "fcvt_l_h": {
+    "encoding": "110001000010-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_zfh"
+    ],
+    "match": "0xc4200053",
+    "mask": "0xfff0007f"
+  },
+  "fcvt_lu_h": {
+    "encoding": "110001000011-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_zfh"
+    ],
+    "match": "0xc4300053",
+    "mask": "0xfff0007f"
+  },
+  "fcvt_h_l": {
+    "encoding": "110101000010-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_zfh"
+    ],
+    "match": "0xd4200053",
+    "mask": "0xfff0007f"
+  },
+  "fcvt_h_lu": {
+    "encoding": "110101000011-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_zfh"
+    ],
+    "match": "0xd4300053",
+    "mask": "0xfff0007f"
+  },
+  "c_zext_w": {
+    "encoding": "----------------100111---1110001",
+    "variable_fields": [
+      "rd_rs1_p"
+    ],
+    "extension": [
+      "rv64_zcb"
+    ],
+    "match": "0x9c71",
+    "mask": "0xfc7f"
+  },
+  "bclri": {
+    "encoding": "010010-----------001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zbs"
+    ],
+    "match": "0x48001013",
+    "mask": "0xfc00707f"
+  },
+  "bexti": {
+    "encoding": "010010-----------101-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zbs"
+    ],
+    "match": "0x48005013",
+    "mask": "0xfc00707f"
+  },
+  "binvi": {
+    "encoding": "011010-----------001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zbs"
+    ],
+    "match": "0x68001013",
+    "mask": "0xfc00707f"
+  },
+  "bseti": {
+    "encoding": "001010-----------001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zbs"
+    ],
+    "match": "0x28001013",
+    "mask": "0xfc00707f"
+  },
+  "packw": {
+    "encoding": "0000100----------100-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zbkb",
+      "rv64_zks",
+      "rv64_zkn",
+      "rv64_zk"
+    ],
+    "match": "0x800403b",
+    "mask": "0xfe00707f"
+  },
+  "clzw": {
+    "encoding": "011000000000-----001-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zbb"
+    ],
+    "match": "0x6000101b",
+    "mask": "0xfff0707f"
+  },
+  "ctzw": {
+    "encoding": "011000000001-----001-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zbb"
+    ],
+    "match": "0x6010101b",
+    "mask": "0xfff0707f"
+  },
+  "cpopw": {
+    "encoding": "011000000010-----001-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_zbb"
+    ],
+    "match": "0x6020101b",
+    "mask": "0xfff0707f"
+  },
+  "rolw": {
+    "encoding": "0110000----------001-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zbb",
+      "rv64_zks",
+      "rv64_zkn",
+      "rv64_zk",
+      "rv64_zbkb"
+    ],
+    "match": "0x6000103b",
+    "mask": "0xfe00707f"
+  },
+  "rorw": {
+    "encoding": "0110000----------101-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zbb",
+      "rv64_zks",
+      "rv64_zkn",
+      "rv64_zk",
+      "rv64_zbkb"
+    ],
+    "match": "0x6000503b",
+    "mask": "0xfe00707f"
+  },
+  "roriw": {
+    "encoding": "0110000----------101-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtw"
+    ],
+    "extension": [
+      "rv64_zbb",
+      "rv64_zks",
+      "rv64_zkn",
+      "rv64_zk",
+      "rv64_zbkb"
+    ],
+    "match": "0x6000501b",
+    "mask": "0xfe00707f"
+  },
+  "rori": {
+    "encoding": "011000-----------101-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zbb",
+      "rv64_zks",
+      "rv64_zkn",
+      "rv64_zk",
+      "rv64_zbkb"
+    ],
+    "match": "0x60005013",
+    "mask": "0xfc00707f"
+  },
+  "add_uw": {
+    "encoding": "0000100----------000-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zba"
+    ],
+    "match": "0x800003b",
+    "mask": "0xfe00707f"
+  },
+  "sh1add_uw": {
+    "encoding": "0010000----------010-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zba"
+    ],
+    "match": "0x2000203b",
+    "mask": "0xfe00707f"
+  },
+  "sh2add_uw": {
+    "encoding": "0010000----------100-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zba"
+    ],
+    "match": "0x2000403b",
+    "mask": "0xfe00707f"
+  },
+  "sh3add_uw": {
+    "encoding": "0010000----------110-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zba"
+    ],
+    "match": "0x2000603b",
+    "mask": "0xfe00707f"
+  },
+  "slli_uw": {
+    "encoding": "000010-----------001-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zba"
+    ],
+    "match": "0x800101b",
+    "mask": "0xfc00707f"
+  },
+  "amocas_q": {
+    "encoding": "00101------------100-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "aq",
+      "rl"
+    ],
+    "extension": [
+      "rv64_zacas"
+    ],
+    "match": "0x2800402f",
+    "mask": "0xf800707f"
+  },
+  "fmvh_x_q": {
+    "encoding": "111001100001-----000-----1010011",
+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
+      "rv64_q_zfa"
+    ],
+    "match": "0xe6100053",
+    "mask": "0xfff0707f"
+  },
+  "fmvp_q_x": {
+    "encoding": "1011011----------000-----1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_q_zfa"
+    ],
+    "match": "0xb6000053",
+    "mask": "0xfe00707f"
+  },
+  "fcvt_l_q": {
+    "encoding": "110001100010-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_q"
+    ],
+    "match": "0xc6200053",
+    "mask": "0xfff0007f"
+  },
+  "fcvt_lu_q": {
+    "encoding": "110001100011-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_q"
+    ],
+    "match": "0xc6300053",
+    "mask": "0xfff0007f"
+  },
+  "fcvt_q_l": {
+    "encoding": "110101100010-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_q"
+    ],
+    "match": "0xd6200053",
+    "mask": "0xfff0007f"
+  },
+  "fcvt_q_lu": {
+    "encoding": "110101100011-------------1010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rm"
+    ],
+    "extension": [
+      "rv64_q"
+    ],
+    "match": "0xd6300053",
+    "mask": "0xfff0007f"
+  },
+  "mulw": {
+    "encoding": "0000001----------000-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_m"
+    ],
+    "match": "0x200003b",
+    "mask": "0xfe00707f"
+  },
+  "divw": {
+    "encoding": "0000001----------100-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_m"
+    ],
+    "match": "0x200403b",
+    "mask": "0xfe00707f"
+  },
+  "divuw": {
+    "encoding": "0000001----------101-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_m"
+    ],
+    "match": "0x200503b",
+    "mask": "0xfe00707f"
+  },
+  "remw": {
+    "encoding": "0000001----------110-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_m"
+    ],
+    "match": "0x200603b",
+    "mask": "0xfe00707f"
+  },
+  "remuw": {
+    "encoding": "0000001----------111-----0111011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_m"
+    ],
+    "match": "0x200703b",
+    "mask": "0xfe00707f"
+  },
+  "lwu": {
+    "encoding": "-----------------110-----0000011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "imm12"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x6003",
+    "mask": "0x707f"
+  },
+  "ld": {
+    "encoding": "-----------------011-----0000011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "imm12"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x3003",
+    "mask": "0x707f"
+  },
+  "sd": {
+    "encoding": "-----------------011-----0100011",
+    "variable_fields": [
+      "imm12hi",
+      "rs1",
+      "rs2",
+      "imm12lo"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x3023",
+    "mask": "0x707f"
+  },
+  "slli": {
+    "encoding": "000000-----------001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x1013",
+    "mask": "0xfc00707f"
+  },
+  "srli": {
+    "encoding": "000000-----------101-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x5013",
+    "mask": "0xfc00707f"
+  },
+  "srai": {
+    "encoding": "010000-----------101-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x40005013",
+    "mask": "0xfc00707f"
+  },
+  "addiw": {
+    "encoding": "-----------------000-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "imm12"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x1b",
+    "mask": "0x707f"
+  },
+  "slliw": {
+    "encoding": "0000000----------001-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtw"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x101b",
+    "mask": "0xfe00707f"
+  },
+  "srliw": {
+    "encoding": "0000000----------101-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtw"
+    ],
+    "extension": [
+      "rv64_i"
+    ],
+    "match": "0x501b",
+    "mask": "0xfe00707f"
+  },
+  "sraiw": {
+    "encoding": "0100000----------101-----0011011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtw"
+    ],
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+    "mask": "0xfe00707f"
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+    "match": "0x2",
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+    "match": "0x6002",
+    "mask": "0xe003"
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+    "match": "0xe002",
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+    "mask": "0xf9f0707f"
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+    "match": "0x2000302f",
+    "mask": "0xf800707f"
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+    "mask": "0xf800707f"
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+    "match": "0x4000302f",
+    "mask": "0xf800707f"
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+    "variable_fields": [
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+      "rs1",
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+    "match": "0x8000302f",
+    "mask": "0xf800707f"
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+    "match": "0xa000302f",
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+    "match": "0xc000302f",
+    "mask": "0xf800707f"
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+  "amomaxu_d": {
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+      "aq",
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+    "match": "0xe000302f",
+    "mask": "0xf800707f"
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+      "rs2"
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+    "extension": [
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+      "rv32_zk"
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+    "mask": "0xfe00707f"
+  },
+  "sha512sum1r": {
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+    "variable_fields": [
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+      "rs2"
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+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
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+    "match": "0x52000033",
+    "mask": "0xfe00707f"
+  },
+  "sha512sig0l": {
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+    "variable_fields": [
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+      "rs2"
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+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
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+    "match": "0x54000033",
+    "mask": "0xfe00707f"
+  },
+  "sha512sig0h": {
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+    "variable_fields": [
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+      "rs1",
+      "rs2"
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+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
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+    "match": "0x5c000033",
+    "mask": "0xfe00707f"
+  },
+  "sha512sig1l": {
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+    "variable_fields": [
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+      "rs1",
+      "rs2"
+    ],
+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
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+    "match": "0x56000033",
+    "mask": "0xfe00707f"
+  },
+  "sha512sig1h": {
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+    "variable_fields": [
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+      "rs1",
+      "rs2"
+    ],
+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
+    ],
+    "match": "0x5e000033",
+    "mask": "0xfe00707f"
+  },
+  "aes32esmi": {
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+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "bs"
+    ],
+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
+    ],
+    "match": "0x26000033",
+    "mask": "0x3e00707f"
+  },
+  "aes32esi": {
+    "encoding": "--10001----------000-----0110011",
+    "variable_fields": [
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+      "rs1",
+      "rs2",
+      "bs"
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+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
+    ],
+    "match": "0x22000033",
+    "mask": "0x3e00707f"
+  },
+  "aes32dsmi": {
+    "encoding": "--10111----------000-----0110011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2",
+      "bs"
+    ],
+    "extension": [
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+      "rv32_zkn",
+      "rv32_zk"
+    ],
+    "match": "0x2e000033",
+    "mask": "0x3e00707f"
+  },
+  "aes32dsi": {
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+    "variable_fields": [
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+      "rs1",
+      "rs2",
+      "bs"
+    ],
+    "extension": [
+      "rv32_zknd",
+      "rv32_zkn",
+      "rv32_zk"
+    ],
+    "match": "0x2a000033",
+    "mask": "0x3e00707f"
+  },
+  "fmvh_x_d": {
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+    "variable_fields": [
+      "rd",
+      "rs1"
+    ],
+    "extension": [
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+    ],
+    "match": "0xe2100053",
+    "mask": "0xfff0707f"
+  },
+  "fmvp_d_x": {
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+    "variable_fields": [
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+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv32_d_zfa"
+    ],
+    "match": "0xb2000053",
+    "mask": "0xfe00707f"
+  },
+  "c_flw": {
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+    "variable_fields": [
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+      "rs1_p",
+      "c_uimm7lo",
+      "c_uimm7hi"
+    ],
+    "extension": [
+      "rv32_c_f"
+    ],
+    "match": "0x6000",
+    "mask": "0xe003"
+  },
+  "c_fsw": {
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+    "variable_fields": [
+      "rs1_p",
+      "rs2_p",
+      "c_uimm7lo",
+      "c_uimm7hi"
+    ],
+    "extension": [
+      "rv32_c_f"
+    ],
+    "match": "0xe000",
+    "mask": "0xe003"
+  },
+  "c_flwsp": {
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+    "variable_fields": [
+      "rd",
+      "c_uimm8sphi",
+      "c_uimm8splo"
+    ],
+    "extension": [
+      "rv32_c_f"
+    ],
+    "match": "0x6002",
+    "mask": "0xe003"
+  },
+  "c_fswsp": {
+    "encoding": "----------------111-----------10",
+    "variable_fields": [
+      "c_rs2",
+      "c_uimm8sp_s"
+    ],
+    "extension": [
+      "rv32_c_f"
+    ],
+    "match": "0xe002",
+    "mask": "0xe003"
+  },
+  "c_jal": {
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+    "variable_fields": [
+      "c_imm12"
+    ],
+    "extension": [
+      "rv32_c"
+    ],
+    "match": "0x2001",
+    "mask": "0xe003"
+  },
+  "xperm16": {
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+    "variable_fields": [
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+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv_zbp"
+    ],
+    "match": "0x28006033",
+    "mask": "0xfe00707f"
+  },
+  "lb_aq": {
+    "encoding": "001101-00000-----000-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rl"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3400002f",
+    "mask": "0xfdf0707f"
+  },
+  "lh_aq": {
+    "encoding": "001101-00000-----001-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rl"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3400102f",
+    "mask": "0xfdf0707f"
+  },
+  "lw_aq": {
+    "encoding": "001101-00000-----010-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rl"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3400202f",
+    "mask": "0xfdf0707f"
+  },
+  "ld_aq": {
+    "encoding": "001101-00000-----011-----0101111",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rl"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3400302f",
+    "mask": "0xfdf0707f"
+  },
+  "sb_rl": {
+    "encoding": "00111-1----------000000000101111",
+    "variable_fields": [
+      "rs1",
+      "rs2",
+      "aq"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3a00002f",
+    "mask": "0xfa007fff"
+  },
+  "sh_rl": {
+    "encoding": "00111-1----------001000000101111",
+    "variable_fields": [
+      "rs1",
+      "rs2",
+      "aq"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3a00102f",
+    "mask": "0xfa007fff"
+  },
+  "sw_rl": {
+    "encoding": "00111-1----------010000000101111",
+    "variable_fields": [
+      "rs1",
+      "rs2",
+      "aq"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3a00202f",
+    "mask": "0xfa007fff"
+  },
+  "sd_rl": {
+    "encoding": "00111-1----------011000000101111",
+    "variable_fields": [
+      "rs1",
+      "rs2",
+      "aq"
+    ],
+    "extension": [
+      "rv_zalasr"
+    ],
+    "match": "0x3a00302f",
+    "mask": "0xfa007fff"
+  },
+  "grevi": {
+    "encoding": "011010-----------101-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zbp"
+    ],
+    "match": "0x68005013",
+    "mask": "0xfc00707f"
+  },
+  "gorci": {
+    "encoding": "001010-----------101-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtd"
+    ],
+    "extension": [
+      "rv64_zbp"
+    ],
+    "match": "0x28005013",
+    "mask": "0xfc00707f"
+  },
+  "shfli": {
+    "encoding": "0000100----------001-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtw"
+    ],
+    "extension": [
+      "rv64_zbp"
+    ],
+    "match": "0x8001013",
+    "mask": "0xfe00707f"
+  },
+  "unshfli": {
+    "encoding": "0000100----------101-----0010011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "shamtw"
+    ],
+    "extension": [
+      "rv64_zbp"
+    ],
+    "match": "0x8005013",
+    "mask": "0xfe00707f"
+  },
+  "xperm32": {
+    "encoding": "0010100----------000-----0110011",
+    "variable_fields": [
+      "rd",
+      "rs1",
+      "rs2"
+    ],
+    "extension": [
+      "rv64_zbp"
+    ],
+    "match": "0x28000033",
+    "mask": "0xfe00707f"
+  }
+}
\ No newline at end of file
diff --git a/opcodes_maker/sorter.py b/opcodes_maker/sorter.py
new file mode 100644
index 000000000..f5da4993d
--- /dev/null
+++ b/opcodes_maker/sorter.py
@@ -0,0 +1,28 @@
+import json
+
+def sort_instr_json(dir_name, outname):
+    with open(dir_name, 'r') as file:
+        data = json.load(file)
+
+    sorted_data = {}
+    for key in sorted(data):
+        entry = data[key]
+        if "variable_fields" in entry:
+            entry["variable_fields"] = sorted(entry["variable_fields"])
+        if "extension" in entry:
+            entry["extension"] = sorted(entry["extension"])
+    
+        # Add the processed entry to the sorted data
+        sorted_data[key] = entry
+
+    with open(outname, 'w') as file:
+        json.dump(sorted_data, file, indent=4)
+    
+    print(json.dumps(sorted_data, indent=4))
+
+def main():
+    sort_instr_json("data.json", "udb_sorted_data.json")
+    sort_instr_json("instr_dict.json", "opcodes_sorted_data.json")
+
+
+main()

From 4bfc6b60479f183aefb2fc7a9241e6ee1fe16e9f Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Thu, 30 Jan 2025 13:07:00 +0000
Subject: [PATCH 02/13] Integrate Brian branch with UDB in ext/ folder. Merge
 the output of the UDB with riscv-opcodes generation process to generate
 riscv-opcodes outputs.

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 ext/opcodes_maker/Makefile        |  61 ++++++++++
 ext/opcodes_maker/generator.py    | 186 ++++++++++++++++++++++++++++++
 ext/opcodes_maker/sorter.py       |  30 +++++
 ext/opcodes_maker/yaml_to_json.py | 178 ++++++++++++++++++++++++++++
 4 files changed, 455 insertions(+)
 create mode 100644 ext/opcodes_maker/Makefile
 create mode 100644 ext/opcodes_maker/generator.py
 create mode 100644 ext/opcodes_maker/sorter.py
 create mode 100644 ext/opcodes_maker/yaml_to_json.py

diff --git a/ext/opcodes_maker/Makefile b/ext/opcodes_maker/Makefile
new file mode 100644
index 000000000..205e43f3e
--- /dev/null
+++ b/ext/opcodes_maker/Makefile
@@ -0,0 +1,61 @@
+# Directories
+YAML_DIR ?= ../../arch/inst
+OPCODES_DIR := ../riscv-opcodes
+OUTPUT_DIR := output
+
+# Python scripts
+YAML_TO_JSON := yaml_to_json.py
+GENERATOR := generator.py
+
+# Output files
+INSTR_DICT := $(OUTPUT_DIR)/instr_dict.json
+
+# Generated output files
+C_OUT := $(OUTPUT_DIR)/encoding.out.h
+CHISEL_OUT := $(OUTPUT_DIR)/inst.chisel
+SPINALHDL_OUT := $(OUTPUT_DIR)/inst.spinalhdl
+SVERILOG_OUT := $(OUTPUT_DIR)/inst.sverilog
+RUST_OUT := $(OUTPUT_DIR)/inst.rs
+GO_OUT := $(OUTPUT_DIR)/inst.go
+LATEX_OUT := $(OUTPUT_DIR)/instr-table.tex
+LATEX_PRIV_OUT := $(OUTPUT_DIR)/priv-instr-table.tex
+PROCESSED_DICT := $(OUTPUT_DIR)/processed_instr_dict.json
+
+# Check for required files
+REQUIRED_FILES := $(YAML_TO_JSON) $(GENERATOR)
+$(foreach file,$(REQUIRED_FILES),\
+    $(if $(wildcard $(file)),,$(error Required file $(file) not found)))
+
+# Default target
+all: generate
+
+# Create output directory
+$(OUTPUT_DIR):
+	mkdir -p $(OUTPUT_DIR)
+
+# Convert YAML to JSON
+$(INSTR_DICT): $(YAML_TO_JSON) | $(OUTPUT_DIR)
+	python3 $(YAML_TO_JSON) $(YAML_DIR) $(OUTPUT_DIR)
+
+# Generate all outputs
+generate: $(INSTR_DICT)
+	python3 $(GENERATOR) $(INSTR_DICT) -c -chisel -rust -go -latex
+	mv encoding.out.h inst.chisel inst.spinalhdl inst.sverilog inst.rs inst.go \
+	   instr-table.tex priv-instr-table.tex processed_instr_dict.json \
+	   $(OUTPUT_DIR)/ 2>/dev/null || true
+
+# Clean generated files
+clean:
+	rm -rf $(OUTPUT_DIR)
+
+# Help target
+help:
+	@echo "Available targets:"
+	@echo "  all (default) - Run complete pipeline: YAML -> JSON -> generate"
+	@echo "  generate     - Generate all output formats from JSON"
+	@echo "  clean        - Remove all generated files"
+	@echo ""
+	@echo "All output files will be placed in the '$(OUTPUT_DIR)' directory"
+	@echo "Use YAML_DIR=/path/to/yaml to specify custom YAML input directory"
+
+.PHONY: all generate clean help
diff --git a/ext/opcodes_maker/generator.py b/ext/opcodes_maker/generator.py
new file mode 100644
index 000000000..48c3bd210
--- /dev/null
+++ b/ext/opcodes_maker/generator.py
@@ -0,0 +1,186 @@
+#!/usr/bin/env python3
+
+import argparse
+import json
+import logging
+import pprint
+import os
+import sys
+import shutil
+from contextlib import contextmanager
+from pathlib import Path
+from typing import Dict, List, Any
+
+# Add riscv-opcodes directory to Python path
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+RISCV_OPCODES_DIR = os.path.join(SCRIPT_DIR, "..", "riscv-opcodes")
+sys.path.insert(0, RISCV_OPCODES_DIR)
+
+
+@contextmanager
+def working_directory(path):
+    """Context manager for changing the current working directory"""
+    prev_cwd = os.getcwd()
+    os.chdir(path)
+    try:
+        yield prev_cwd
+    finally:
+        os.chdir(prev_cwd)
+
+
+# Change to riscv-opcodes directory when importing to ensure relative paths work
+with working_directory(RISCV_OPCODES_DIR):
+    from c_utils import make_c
+    from chisel_utils import make_chisel
+    from constants import emitted_pseudo_ops
+    from go_utils import make_go
+    from latex_utils import make_latex_table, make_priv_latex_table
+    from rust_utils import make_rust
+    from sverilog_utils import make_sverilog
+
+LOG_FORMAT = "%(levelname)s:: %(message)s"
+LOG_LEVEL = logging.INFO
+
+pretty_printer = pprint.PrettyPrinter(indent=2)
+logging.basicConfig(level=LOG_LEVEL, format=LOG_FORMAT)
+
+
+def load_instruction_dict(json_path: str) -> Dict[str, Any]:
+    """
+    Load instruction dictionary from a JSON file.
+    """
+    try:
+        with open(json_path, encoding="utf-8") as f:
+            return json.load(f)
+    except FileNotFoundError:
+        logging.error(f"Input JSON file not found: {json_path}")
+        raise
+    except json.JSONDecodeError:
+        logging.error(f"Invalid JSON format in file: {json_path}")
+        raise
+
+
+def move_file(src: str, dest_dir: str):
+    """
+    Move a file to the destination directory if it exists.
+    """
+    if os.path.exists(src):
+        dest = os.path.join(dest_dir, os.path.basename(src))
+        shutil.move(src, dest)
+
+
+def generate_outputs(
+    instr_dict: Dict[str, Any],
+    include_pseudo: bool,
+    c: bool,
+    chisel: bool,
+    spinalhdl: bool,
+    sverilog: bool,
+    rust: bool,
+    go: bool,
+    latex: bool,
+):
+    """
+    Generate output files based on the instruction dictionary.
+    """
+    # Sort the dictionary for consistent output
+    instr_dict = dict(sorted(instr_dict.items()))
+
+    # Save the processed dictionary in current directory
+    with open("processed_instr_dict.json", "w", encoding="utf-8") as outfile:
+        json.dump(instr_dict, outfile, indent=2)
+
+    # Generate files in riscv-opcodes directory and move them to current directory
+    with working_directory(RISCV_OPCODES_DIR) as orig_dir:
+        if c:
+            # For C output, filter pseudo-ops if needed
+            if not include_pseudo:
+                c_dict = {
+                    k: v for k, v in instr_dict.items() if k not in emitted_pseudo_ops
+                }
+            else:
+                c_dict = instr_dict
+            make_c(c_dict)
+            move_file("encoding.out.h", orig_dir)
+            logging.info("encoding.out.h generated successfully")
+
+        if chisel:
+            make_chisel(instr_dict)
+            move_file("inst.chisel", orig_dir)
+            logging.info("inst.chisel generated successfully")
+
+        if spinalhdl:
+            make_chisel(instr_dict, True)
+            move_file("inst.spinalhdl", orig_dir)
+            logging.info("inst.spinalhdl generated successfully")
+
+        if sverilog:
+            make_sverilog(instr_dict)
+            move_file("inst.sverilog", orig_dir)
+            logging.info("inst.sverilog generated successfully")
+
+        if rust:
+            make_rust(instr_dict)
+            move_file("inst.rs", orig_dir)
+            logging.info("inst.rs generated successfully")
+
+        if go:
+            make_go(instr_dict)
+            move_file("inst.go", orig_dir)
+            logging.info("inst.go generated successfully")
+
+        if latex:
+            make_latex_table()
+            make_priv_latex_table()
+            move_file("instr-table.tex", orig_dir)
+            move_file("priv-instr-table.tex", orig_dir)
+            logging.info("LaTeX files generated successfully")
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Generate RISC-V constants from JSON input"
+    )
+    parser.add_argument(
+        "input_json", help="Path to JSON file containing instruction definitions"
+    )
+    parser.add_argument(
+        "-pseudo", action="store_true", help="Include pseudo-instructions"
+    )
+    parser.add_argument("-c", action="store_true", help="Generate output for C")
+    parser.add_argument(
+        "-chisel", action="store_true", help="Generate output for Chisel"
+    )
+    parser.add_argument(
+        "-spinalhdl", action="store_true", help="Generate output for SpinalHDL"
+    )
+    parser.add_argument(
+        "-sverilog", action="store_true", help="Generate output for SystemVerilog"
+    )
+    parser.add_argument("-rust", action="store_true", help="Generate output for Rust")
+    parser.add_argument("-go", action="store_true", help="Generate output for Go")
+    parser.add_argument("-latex", action="store_true", help="Generate output for Latex")
+
+    args = parser.parse_args()
+
+    # Load instruction dictionary from JSON
+    instr_dict = load_instruction_dict(args.input_json)
+
+    print(f"Loaded instruction dictionary from: {args.input_json}")
+
+    # Generate outputs based on the loaded dictionary
+    generate_outputs(
+        instr_dict,
+        args.pseudo,
+        args.c,
+        args.chisel,
+        args.spinalhdl,
+        args.sverilog,
+        args.rust,
+        args.go,
+        args.latex,
+    )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/ext/opcodes_maker/sorter.py b/ext/opcodes_maker/sorter.py
new file mode 100644
index 000000000..b2b07deac
--- /dev/null
+++ b/ext/opcodes_maker/sorter.py
@@ -0,0 +1,30 @@
+import json
+
+
+def sort_instr_json(dir_name, outname):
+    with open(dir_name) as file:
+        data = json.load(file)
+
+    sorted_data = {}
+    for key in sorted(data):
+        entry = data[key]
+        if "variable_fields" in entry:
+            entry["variable_fields"] = sorted(entry["variable_fields"])
+        if "extension" in entry:
+            entry["extension"] = sorted(entry["extension"])
+
+        # Add the processed entry to the sorted data
+        sorted_data[key] = entry
+
+    with open(outname, "w") as file:
+        json.dump(sorted_data, file, indent=4)
+
+    print(json.dumps(sorted_data, indent=4))
+
+
+def main():
+    sort_instr_json("instr_dict.json", "udb_sorted_data.json")
+    sort_instr_json("instr_dict.json", "opcodes_sorted_data.json")
+
+
+main()
diff --git a/ext/opcodes_maker/yaml_to_json.py b/ext/opcodes_maker/yaml_to_json.py
new file mode 100644
index 000000000..2d9c9fbba
--- /dev/null
+++ b/ext/opcodes_maker/yaml_to_json.py
@@ -0,0 +1,178 @@
+from typing import List, Dict
+import os
+import yaml
+import json
+import argparse
+
+
+def range_size(range_str: str) -> int:
+    try:
+        end, start = map(int, range_str.split("-"))
+        return abs(end - start) + 1
+    except ValueError:
+        return 0
+
+
+reg_names = {"qs1", "qs2", "qd", "fs1", "fs2", "fd"}
+
+
+def GetVariables(vars: List[Dict[str, str]]):
+    var_names = []
+    for var in vars:
+        var_name = var["name"]
+        if var_name in reg_names:
+            # Since strings are immutable.
+            lst_var_name = list(var_name)
+            lst_var_name[0] = "r"
+            var_name = "".join(lst_var_name)
+        elif var_name == "shamt":
+            size = range_size(var["location"])
+            if size == 5:
+                var_name = "shamtw"
+            elif size == 6:
+                var_name = "shamtd"
+        var_names.append(var_name)
+    var_names.reverse()
+
+    return var_names
+
+
+def BitStringToHex(bit_str: str) -> str:
+    new_bit_str = ""
+    for bit in bit_str:
+        if bit == "-":
+            new_bit_str += "0"
+        else:
+            new_bit_str += bit
+    return hex(int(new_bit_str, 2))
+
+
+def GetMask(bit_str: str) -> str:
+    mask_str = ""
+    for bit in bit_str:
+        if bit == "-":
+            mask_str += "0"
+        else:
+            mask_str += "1"
+    return hex(int(mask_str, 2))
+
+
+def GetExtension(ext, base):
+    prefix = f"rv{base}_"
+    final_extensions = []
+
+    if isinstance(ext, str):
+        final_extensions.append(prefix + ext.lower())
+    elif isinstance(ext, dict):
+        for _, extensions in ext.items():
+            for extension in extensions:
+                final_extensions.append(prefix + extension.lower())
+            final_extensions.reverse()
+
+    return final_extensions
+
+
+def find_first_match(data):
+    if isinstance(data, dict):
+        for key, value in data.items():
+            if key == "match":
+                return value
+            elif isinstance(value, (dict, list)):
+                result = find_first_match(value)
+                if result is not None:
+                    return result
+    elif isinstance(data, list):
+        for item in data:
+            result = find_first_match(item)
+            if result is not None:
+                return result
+    return ""
+
+
+def GetEncodings(enc: str):
+    n = len(enc)
+    if n < 32:
+        return "-" * (32 - n) + enc
+    return enc
+
+
+def convert(file_dir: str, json_out):
+    with open(file_dir) as file:
+        data = yaml.safe_load(file)
+        instr_name = data["name"].replace(".", "_")
+
+        print(instr_name)
+        encodings = data["encoding"]
+
+        # USE RV_64
+        rv64_flag = False
+        if "RV64" in encodings:
+            encodings = encodings["RV64"]
+            rv64_flag = True
+        enc_match = GetEncodings(encodings["match"])
+
+        var_names = []
+        if "variables" in encodings:
+            var_names = GetVariables(encodings["variables"])
+
+        extension = []
+        prefix = ""
+        if rv64_flag:
+            prefix = "64"
+        if "base" in data:
+            extension = GetExtension(data["definedBy"], data["base"])
+        else:
+            extension = GetExtension(data["definedBy"], prefix)
+
+        match_hex = BitStringToHex(enc_match)
+        match_mask = GetMask(enc_match)
+
+        json_out[instr_name] = {
+            "encoding": enc_match,
+            "variable_fields": var_names,
+            "extension": extension,
+            "match": match_hex,
+            "mask": match_mask,
+        }
+
+
+def read_yaml_insts(path: str):
+    yaml_files = []
+    for root, _, files in os.walk(path):
+        for file in files:
+            if file.endswith(".yaml") or file.endswith(".yml"):
+                yaml_files.append(os.path.join(root, file))
+    return yaml_files
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Convert YAML instruction files to JSON"
+    )
+    parser.add_argument("input_dir", help="Directory containing YAML instruction files")
+    parser.add_argument("output_dir", help="Output directory for generated files")
+
+    args = parser.parse_args()
+
+    # Ensure input directory exists
+    if not os.path.isdir(args.input_dir):
+        parser.error(f"Input directory does not exist: {args.input_dir}")
+
+    insts = read_yaml_insts(args.input_dir)
+    if not insts:
+        parser.error(f"No YAML files found in {args.input_dir}")
+
+    inst_dict = {}
+    output_file = os.path.join(args.output_dir, "instr_dict.json")
+
+    with open(output_file, "w") as outfile:
+        for inst_dir in insts:
+            convert(inst_dir, inst_dict)
+        json.dump(inst_dict, outfile, indent=4)
+
+    print(f"Successfully processed {len(insts)} YAML files")
+    print(f"Output written to: {output_file}")
+
+
+if __name__ == "__main__":
+    main()

From 9c0fadceccd2cf0c3c0d9dd2651c2a22e8a5d79e Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Thu, 30 Jan 2025 13:12:11 +0000
Subject: [PATCH 03/13] Add README.md with instruction on how to use this tool.

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 ext/opcodes_maker/README.md | 89 +++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 ext/opcodes_maker/README.md

diff --git a/ext/opcodes_maker/README.md b/ext/opcodes_maker/README.md
new file mode 100644
index 000000000..84d5735ae
--- /dev/null
+++ b/ext/opcodes_maker/README.md
@@ -0,0 +1,89 @@
+# RISC-V Instruction Format Generator
+
+This tool converts RISC-V instruction YAML definitions into various output formats including C headers, Chisel, Rust, Go, and LaTeX documentation.
+
+## Prerequisites
+
+- Python 3
+- YAML Python package (`pip install pyyaml`)
+- Make
+
+## Directory Structure
+
+```
+.
+├── yaml_to_json.py    # Converts YAML instruction definitions to JSON
+├── generator.py       # Generates various output formats from JSON
+├── output/           # Generated files directory
+└── Makefile         # Build system configuration
+```
+
+## Input/Output Format
+
+### Input
+- YAML files containing RISC-V instruction definitions
+- Default input directory: `../../arch/inst`
+- Can be customized using `YAML_DIR` variable
+
+### Output
+All outputs are generated in the `output` directory:
+- `encoding.out.h` - C header definitions
+- `inst.chisel` - Chisel implementation
+- `inst.spinalhdl` - SpinalHDL implementation
+- `inst.sverilog` - SystemVerilog implementation
+- `inst.rs` - Rust implementation
+- `inst.go` - Go implementation
+- `instr-table.tex` - LaTeX instruction table
+- `priv-instr-table.tex` - LaTeX privileged instruction table
+- `instr_dict.json` - Intermediate JSON representation
+- `processed_instr_dict.json` - Final processed JSON
+
+## Usage
+
+### Basic Usage
+```bash
+make                        # Use default YAML directory
+make YAML_DIR=/custom/path  # Use custom YAML directory
+make clean                  # Remove all generated files
+make help                   # Show help message
+```
+
+### Pipeline Steps
+1. YAML to JSON conversion (`yaml_to_json.py`)
+   - Reads YAML instruction definitions
+   - Creates intermediate JSON representation
+
+2. Output Generation (`generator.py`)
+   - Takes JSON input
+   - Generates all output formats
+   - Places results in output directory
+
+### Customization
+- Input directory can be changed:
+  ```bash
+  make YAML_DIR=/path/to/yaml/files
+  ```
+- Default paths in Makefile:
+  ```makefile
+  YAML_DIR ?= ../../arch/inst
+  OPCODES_DIR := ../riscv-opcodes
+  OUTPUT_DIR := output
+  ```
+
+## Error Handling
+- Checks for required Python scripts before execution
+- Verifies input directory exists
+- Creates output directory if missing
+- Shows helpful error messages for missing files/directories
+
+## Cleaning Up
+```bash
+make clean  # Removes all generated files and output directory
+```
+
+## Dependencies
+- Requires access to RISC-V opcodes repository (expected at `../riscv-opcodes`)
+- Python scripts use standard libraries plus PyYAML
+
+## Note
+Make sure your input YAML files follow the expected RISC-V instruction definition format. For format details, refer to the RISC-V specification or example YAML files in the arch/inst directory.

From ca6ee60fe4dcc35ca6b2bc61506f7bde5f85a301 Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Thu, 30 Jan 2025 13:23:18 +0000
Subject: [PATCH 04/13] Enhance error handling and support for non-default
 extensions, such as qc_iu

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 ext/opcodes_maker/yaml_to_json.py | 190 +++++++++++++++++-------------
 1 file changed, 110 insertions(+), 80 deletions(-)

diff --git a/ext/opcodes_maker/yaml_to_json.py b/ext/opcodes_maker/yaml_to_json.py
index 2d9c9fbba..93c55182e 100644
--- a/ext/opcodes_maker/yaml_to_json.py
+++ b/ext/opcodes_maker/yaml_to_json.py
@@ -1,8 +1,11 @@
-from typing import List, Dict
+#!/usr/bin/env python3
+
+from typing import List, Dict, Union, Any
 import os
 import yaml
 import json
 import argparse
+import sys
 
 
 def range_size(range_str: str) -> int:
@@ -16,7 +19,7 @@ def range_size(range_str: str) -> int:
 reg_names = {"qs1", "qs2", "qd", "fs1", "fs2", "fd"}
 
 
-def GetVariables(vars: List[Dict[str, str]]):
+def GetVariables(vars: List[Dict[str, str]]) -> List[str]:
     var_names = []
     for var in vars:
         var_name = var["name"]
@@ -33,7 +36,6 @@ def GetVariables(vars: List[Dict[str, str]]):
                 var_name = "shamtd"
         var_names.append(var_name)
     var_names.reverse()
-
     return var_names
 
 
@@ -57,86 +59,105 @@ def GetMask(bit_str: str) -> str:
     return hex(int(mask_str, 2))
 
 
-def GetExtension(ext, base):
+def process_extension(ext: Union[str, dict]) -> List[str]:
+    """Process an extension definition into a list of strings."""
+    if isinstance(ext, str):
+        return [ext.lower()]
+    elif isinstance(ext, dict):
+        result = []
+        for item in ext.values():
+            if isinstance(item, list):
+                result.extend(
+                    [
+                        x.lower() if isinstance(x, str) else x["name"].lower()
+                        for x in item
+                    ]
+                )
+            elif isinstance(item, (str, dict)):
+                if isinstance(item, str):
+                    result.append(item.lower())
+                else:
+                    result.append(item["name"].lower())
+        return result
+    return []
+
+
+def GetExtension(ext: Union[str, dict, list], base: str) -> List[str]:
+    """Get a list of extensions with proper prefix."""
     prefix = f"rv{base}_"
     final_extensions = []
 
-    if isinstance(ext, str):
-        final_extensions.append(prefix + ext.lower())
-    elif isinstance(ext, dict):
-        for _, extensions in ext.items():
-            for extension in extensions:
-                final_extensions.append(prefix + extension.lower())
-            final_extensions.reverse()
-
-    return final_extensions
-
-
-def find_first_match(data):
-    if isinstance(data, dict):
-        for key, value in data.items():
-            if key == "match":
-                return value
-            elif isinstance(value, (dict, list)):
-                result = find_first_match(value)
-                if result is not None:
-                    return result
-    elif isinstance(data, list):
-        for item in data:
-            result = find_first_match(item)
-            if result is not None:
-                return result
-    return ""
-
-
-def GetEncodings(enc: str):
+    if isinstance(ext, (str, dict)):
+        extensions = process_extension(ext)
+        final_extensions.extend(prefix + x for x in extensions)
+    elif isinstance(ext, list):
+        for item in ext:
+            extensions = process_extension(item)
+            final_extensions.extend(prefix + x for x in extensions)
+
+    # Remove duplicates while preserving order
+    seen = set()
+    return [x for x in final_extensions if not (x in seen or seen.add(x))]
+
+
+def GetEncodings(enc: str) -> str:
     n = len(enc)
     if n < 32:
         return "-" * (32 - n) + enc
     return enc
 
 
-def convert(file_dir: str, json_out):
-    with open(file_dir) as file:
-        data = yaml.safe_load(file)
-        instr_name = data["name"].replace(".", "_")
-
-        print(instr_name)
-        encodings = data["encoding"]
-
-        # USE RV_64
-        rv64_flag = False
-        if "RV64" in encodings:
-            encodings = encodings["RV64"]
-            rv64_flag = True
-        enc_match = GetEncodings(encodings["match"])
-
-        var_names = []
-        if "variables" in encodings:
-            var_names = GetVariables(encodings["variables"])
-
-        extension = []
-        prefix = ""
-        if rv64_flag:
-            prefix = "64"
-        if "base" in data:
-            extension = GetExtension(data["definedBy"], data["base"])
-        else:
-            extension = GetExtension(data["definedBy"], prefix)
-
-        match_hex = BitStringToHex(enc_match)
-        match_mask = GetMask(enc_match)
-
-        json_out[instr_name] = {
-            "encoding": enc_match,
-            "variable_fields": var_names,
-            "extension": extension,
-            "match": match_hex,
-            "mask": match_mask,
-        }
-
-
-def read_yaml_insts(path: str):
+def convert(file_dir: str, json_out: Dict[str, Any]) -> None:
+    try:
+        with open(file_dir) as file:
+            data = yaml.safe_load(file)
+            instr_name = data["name"].replace(".", "_")
+
+            print(instr_name)
+            encodings = data["encoding"]
+
+            # USE RV_64
+            rv64_flag = False
+            if "RV64" in encodings:
+                encodings = encodings["RV64"]
+                rv64_flag = True
+            enc_match = GetEncodings(encodings["match"])
+
+            var_names = []
+            if "variables" in encodings:
+                var_names = GetVariables(encodings["variables"])
+
+            extension = []
+            prefix = ""
+            if rv64_flag:
+                prefix = "64"
+            try:
+                if "base" in data:
+                    extension = GetExtension(data["definedBy"], data["base"])
+                else:
+                    extension = GetExtension(data["definedBy"], prefix)
+            except Exception as e:
+                print(
+                    f"Warning: Error processing extensions for {instr_name}: {str(e)}"
+                )
+                extension = []
+
+            match_hex = BitStringToHex(enc_match)
+            match_mask = GetMask(enc_match)
+
+            json_out[instr_name] = {
+                "encoding": enc_match,
+                "variable_fields": var_names,
+                "extension": extension,
+                "match": match_hex,
+                "mask": match_mask,
+            }
+    except Exception as e:
+        print(f"Error processing file {file_dir}: {str(e)}")
+        raise
+
+
+def read_yaml_insts(path: str) -> List[str]:
     yaml_files = []
     for root, _, files in os.walk(path):
         for file in files:
@@ -165,13 +186,22 @@ def main():
     inst_dict = {}
     output_file = os.path.join(args.output_dir, "instr_dict.json")
 
-    with open(output_file, "w") as outfile:
+    try:
         for inst_dir in insts:
-            convert(inst_dir, inst_dict)
-        json.dump(inst_dict, outfile, indent=4)
-
-    print(f"Successfully processed {len(insts)} YAML files")
-    print(f"Output written to: {output_file}")
+            try:
+                convert(inst_dir, inst_dict)
+            except Exception as e:
+                print(f"Warning: Failed to process {inst_dir}: {str(e)}")
+                continue
+
+        with open(output_file, "w") as outfile:
+            json.dump(inst_dict, outfile, indent=4)
+
+        print(f"Successfully processed {len(insts)} YAML files")
+        print(f"Output written to: {output_file}")
+    except Exception as e:
+        print(f"Error: Failed to process YAML files: {str(e)}")
+        sys.exit(1)
 
 
 if __name__ == "__main__":

From 6fe6eb1c7b19466cd2495a23dc06925fa904094b Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Mon, 3 Feb 2025 12:17:46 +0000
Subject: [PATCH 05/13] Switch directory folder and remove duplicated content

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 .pre-commit-config.yaml                       |     0
 {ext => backends}/opcodes_maker/Makefile      |     0
 {ext => backends}/opcodes_maker/README.md     |     0
 {ext => backends}/opcodes_maker/generator.py  |     2 +-
 {ext => backends}/opcodes_maker/sorter.py     |     0
 .../opcodes_maker/yaml_to_json.py             |     0
 opcodes_maker/generate_instr_dict.py          |   148 -
 opcodes_maker/instr_dict.json                 | 15446 ----------------
 opcodes_maker/sorter.py                       |    28 -
 9 files changed, 1 insertion(+), 15623 deletions(-)
 mode change 100644 => 100755 .pre-commit-config.yaml
 rename {ext => backends}/opcodes_maker/Makefile (100%)
 rename {ext => backends}/opcodes_maker/README.md (100%)
 rename {ext => backends}/opcodes_maker/generator.py (98%)
 mode change 100644 => 100755
 rename {ext => backends}/opcodes_maker/sorter.py (100%)
 rename {ext => backends}/opcodes_maker/yaml_to_json.py (100%)
 delete mode 100644 opcodes_maker/generate_instr_dict.py
 delete mode 100644 opcodes_maker/instr_dict.json
 delete mode 100644 opcodes_maker/sorter.py

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
old mode 100644
new mode 100755
diff --git a/ext/opcodes_maker/Makefile b/backends/opcodes_maker/Makefile
similarity index 100%
rename from ext/opcodes_maker/Makefile
rename to backends/opcodes_maker/Makefile
diff --git a/ext/opcodes_maker/README.md b/backends/opcodes_maker/README.md
similarity index 100%
rename from ext/opcodes_maker/README.md
rename to backends/opcodes_maker/README.md
diff --git a/ext/opcodes_maker/generator.py b/backends/opcodes_maker/generator.py
old mode 100644
new mode 100755
similarity index 98%
rename from ext/opcodes_maker/generator.py
rename to backends/opcodes_maker/generator.py
index 48c3bd210..e61c51638
--- a/ext/opcodes_maker/generator.py
+++ b/backends/opcodes_maker/generator.py
@@ -13,7 +13,7 @@
 
 # Add riscv-opcodes directory to Python path
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
-RISCV_OPCODES_DIR = os.path.join(SCRIPT_DIR, "..", "riscv-opcodes")
+RISCV_OPCODES_DIR = os.path.join(SCRIPT_DIR, "..", "..", "ext", "riscv-opcodes")
 sys.path.insert(0, RISCV_OPCODES_DIR)
 
 
diff --git a/ext/opcodes_maker/sorter.py b/backends/opcodes_maker/sorter.py
similarity index 100%
rename from ext/opcodes_maker/sorter.py
rename to backends/opcodes_maker/sorter.py
diff --git a/ext/opcodes_maker/yaml_to_json.py b/backends/opcodes_maker/yaml_to_json.py
similarity index 100%
rename from ext/opcodes_maker/yaml_to_json.py
rename to backends/opcodes_maker/yaml_to_json.py
diff --git a/opcodes_maker/generate_instr_dict.py b/opcodes_maker/generate_instr_dict.py
deleted file mode 100644
index 3560cbb93..000000000
--- a/opcodes_maker/generate_instr_dict.py
+++ /dev/null
@@ -1,148 +0,0 @@
-from typing import List, Dict
-import os
-import yaml
-import json
-
-
-def range_size(range_str: str) -> int:
-    try:
-        end, start = map(int, range_str.split('-'))
-        return abs(end - start) + 1
-    except ValueError:
-        return 0;
-
-reg_names = {'qs1', 'qs2', 'qd',
-             'fs1', 'fs2', 'fd'}
-
-def GetVariables(vars: List[Dict[str, str]]):
-    var_names = []
-    for var in vars:
-        var_name = var['name']
-        if var_name in reg_names:
-            # Since strings are immutable.
-            lst_var_name = list(var_name)
-            lst_var_name[0] = 'r'
-            var_name = "".join(lst_var_name)
-        elif var_name == "shamt":
-            size = range_size(var['location'])
-            if size == 5:
-                var_name = "shamtw"
-            elif size == 6:
-                var_name = "shamtd"
-        var_names.append(var_name)
-    var_names.reverse()
-
-    return var_names
-
-def BitStringToHex(bit_str: str) -> str:
-    new_bit_str = ""
-    for bit in bit_str:
-        if bit == '-':
-            new_bit_str += '0'
-        else:
-            new_bit_str += bit
-    return hex(int(new_bit_str, 2))
-
-def GetMask(bit_str: str) -> str:
-    mask_str = ""
-    for bit in bit_str:
-        if bit == '-':
-            mask_str += '0'
-        else:
-            mask_str += '1'
-    return hex(int(mask_str, 2))
-
-def GetExtension(ext, base):
-    prefix = f'rv{base}_'
-    final_extensions = []
-
-    if isinstance(ext, str):
-        final_extensions.append(prefix + ext.lower())
-    elif isinstance(ext, dict):
-        for _, extensions in ext.items():
-            for extension in extensions:
-                final_extensions.append(prefix + extension.lower())
-            final_extensions.reverse()
-
-    return final_extensions
-
-def find_first_match(data):
-    if isinstance(data, dict):
-        for key, value in data.items():
-            if key == "match":
-                return value
-            elif isinstance(value, (dict, list)):
-                result = find_first_match(value)
-                if result is not None:
-                    return result
-    elif isinstance(data, list):
-        for item in data:
-            result = find_first_match(item)
-            if result is not None:
-                return result
-    return ""
-
-def GetEncodings(enc: str):
-    n = len(enc)
-    if n < 32:
-        return '-' * (32-n) + enc
-    return enc
-
-def convert(file_dir: str, json_out):
-    with open(file_dir, 'r') as file:
-        data = yaml.safe_load(file)
-        instr_name = data['name'].replace('.', '_')
-
-        print(instr_name)
-        encodings = data['encoding']
-         
-        # USE RV_64
-        rv64_flag = False
-        if 'RV64' in encodings:
-            encodings = encodings['RV64']
-            rv64_flag = True
-        enc_match = GetEncodings(encodings['match'])
-
-        var_names = []
-        if 'variables' in encodings:
-            var_names = GetVariables(encodings['variables'])
-
-        extension = []
-        prefix = ""
-        if rv64_flag:
-            prefix = "64"
-        if "base" in data:
-            extension = GetExtension(data["definedBy"], data["base"])
-        else:
-            extension = GetExtension(data["definedBy"], prefix) 
-
-        match_hex = BitStringToHex(enc_match)
-        match_mask = GetMask(enc_match)
-
-        json_out[instr_name] = {
-            "encoding": enc_match,
-            "variable_fields": var_names,
-            "extension": extension,
-            "match": match_hex,
-            "mask": match_mask
-        }
-
-def read_yaml_insts(path: str):
-    yaml_files = []
-    for root, _, files in os.walk(path):
-        for file in files:
-            if file.endswith('.yaml') or file.endswith('.yml'):
-                yaml_files.append(os.path.join(root, file))
-    return yaml_files
-
-def main():
-    directory = "../arch/inst/"
-    insts = read_yaml_insts(directory)
-    
-    inst_dict = {}
-    with open('data.json', 'w') as outfile:
-        for inst_dir in insts:
-            convert(inst_dir, inst_dict)
-        json.dump(inst_dict, outfile, indent=4)
-main()
-
diff --git a/opcodes_maker/instr_dict.json b/opcodes_maker/instr_dict.json
deleted file mode 100644
index 61d282169..000000000
--- a/opcodes_maker/instr_dict.json
+++ /dev/null
@@ -1,15446 +0,0 @@
-{
-  "vsm3c_vi": {
-    "encoding": "1010111----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "zimm5",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvksh",
-      "rv_zvks"
-    ],
-    "match": "0xae002077",
-    "mask": "0xfe00707f"
-  },
-  "vsm3me_vv": {
-    "encoding": "1000001----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vs1",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvksh",
-      "rv_zvks"
-    ],
-    "match": "0x82002077",
-    "mask": "0xfe00707f"
-  },
-  "vsm4k_vi": {
-    "encoding": "1000011----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "zimm5",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvksed",
-      "rv_zvks"
-    ],
-    "match": "0x86002077",
-    "mask": "0xfe00707f"
-  },
-  "vsm4r_vv": {
-    "encoding": "1010001-----10000010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvksed",
-      "rv_zvks"
-    ],
-    "match": "0xa2082077",
-    "mask": "0xfe0ff07f"
-  },
-  "vsm4r_vs": {
-    "encoding": "1010011-----10000010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvksed",
-      "rv_zvks"
-    ],
-    "match": "0xa6082077",
-    "mask": "0xfe0ff07f"
-  },
-  "vsha2ms_vv": {
-    "encoding": "1011011----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vs1",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvknha",
-      "rv_zvknhb",
-      "rv_zvkn"
-    ],
-    "match": "0xb6002077",
-    "mask": "0xfe00707f"
-  },
-  "vsha2ch_vv": {
-    "encoding": "1011101----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vs1",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvknha",
-      "rv_zvknhb",
-      "rv_zvkn"
-    ],
-    "match": "0xba002077",
-    "mask": "0xfe00707f"
-  },
-  "vsha2cl_vv": {
-    "encoding": "1011111----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vs1",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvknha",
-      "rv_zvknhb",
-      "rv_zvkn"
-    ],
-    "match": "0xbe002077",
-    "mask": "0xfe00707f"
-  },
-  "vaesdf_vv": {
-    "encoding": "1010001-----00001010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa200a077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesdf_vs": {
-    "encoding": "1010011-----00001010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa600a077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesdm_vv": {
-    "encoding": "1010001-----00000010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa2002077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesdm_vs": {
-    "encoding": "1010011-----00000010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa6002077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesef_vv": {
-    "encoding": "1010001-----00011010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa201a077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesef_vs": {
-    "encoding": "1010011-----00011010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa601a077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesem_vv": {
-    "encoding": "1010001-----00010010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa2012077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesem_vs": {
-    "encoding": "1010011-----00010010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa6012077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaesz_vs": {
-    "encoding": "1010011-----00111010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xa603a077",
-    "mask": "0xfe0ff07f"
-  },
-  "vaeskf1_vi": {
-    "encoding": "1000101----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "zimm5",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0x8a002077",
-    "mask": "0xfe00707f"
-  },
-  "vaeskf2_vi": {
-    "encoding": "1010101----------010-----1110111",
-    "variable_fields": [
-      "vs2",
-      "zimm5",
-      "vd"
-    ],
-    "extension": [
-      "rv_zvkned",
-      "rv_zvkn"
-    ],
-    "match": "0xaa002077",
-    "mask": "0xfe00707f"
-  },
-  "vgmul_vv": {
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-      "rl"
-    ],
-    "extension": [
-      "rv64_a"
-    ],
-    "match": "0x8000302f",
-    "mask": "0xf800707f"
-  },
-  "amomax_d": {
-    "encoding": "10100------------011-----0101111",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2",
-      "aq",
-      "rl"
-    ],
-    "extension": [
-      "rv64_a"
-    ],
-    "match": "0xa000302f",
-    "mask": "0xf800707f"
-  },
-  "amominu_d": {
-    "encoding": "11000------------011-----0101111",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2",
-      "aq",
-      "rl"
-    ],
-    "extension": [
-      "rv64_a"
-    ],
-    "match": "0xc000302f",
-    "mask": "0xf800707f"
-  },
-  "amomaxu_d": {
-    "encoding": "11100------------011-----0101111",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2",
-      "aq",
-      "rl"
-    ],
-    "extension": [
-      "rv64_a"
-    ],
-    "match": "0xe000302f",
-    "mask": "0xf800707f"
-  },
-  "sha512sum0r": {
-    "encoding": "0101000----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv32_zknh",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x50000033",
-    "mask": "0xfe00707f"
-  },
-  "sha512sum1r": {
-    "encoding": "0101001----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv32_zknh",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x52000033",
-    "mask": "0xfe00707f"
-  },
-  "sha512sig0l": {
-    "encoding": "0101010----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv32_zknh",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x54000033",
-    "mask": "0xfe00707f"
-  },
-  "sha512sig0h": {
-    "encoding": "0101110----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv32_zknh",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x5c000033",
-    "mask": "0xfe00707f"
-  },
-  "sha512sig1l": {
-    "encoding": "0101011----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv32_zknh",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x56000033",
-    "mask": "0xfe00707f"
-  },
-  "sha512sig1h": {
-    "encoding": "0101111----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv32_zknh",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x5e000033",
-    "mask": "0xfe00707f"
-  },
-  "aes32esmi": {
-    "encoding": "--10011----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2",
-      "bs"
-    ],
-    "extension": [
-      "rv32_zkne",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x26000033",
-    "mask": "0x3e00707f"
-  },
-  "aes32esi": {
-    "encoding": "--10001----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2",
-      "bs"
-    ],
-    "extension": [
-      "rv32_zkne",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x22000033",
-    "mask": "0x3e00707f"
-  },
-  "aes32dsmi": {
-    "encoding": "--10111----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2",
-      "bs"
-    ],
-    "extension": [
-      "rv32_zknd",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x2e000033",
-    "mask": "0x3e00707f"
-  },
-  "aes32dsi": {
-    "encoding": "--10101----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2",
-      "bs"
-    ],
-    "extension": [
-      "rv32_zknd",
-      "rv32_zkn",
-      "rv32_zk"
-    ],
-    "match": "0x2a000033",
-    "mask": "0x3e00707f"
-  },
-  "fmvh_x_d": {
-    "encoding": "111000100001-----000-----1010011",
-    "variable_fields": [
-      "rd",
-      "rs1"
-    ],
-    "extension": [
-      "rv32_d_zfa"
-    ],
-    "match": "0xe2100053",
-    "mask": "0xfff0707f"
-  },
-  "fmvp_d_x": {
-    "encoding": "1011001----------000-----1010011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv32_d_zfa"
-    ],
-    "match": "0xb2000053",
-    "mask": "0xfe00707f"
-  },
-  "c_flw": {
-    "encoding": "----------------011-----------00",
-    "variable_fields": [
-      "rd_p",
-      "rs1_p",
-      "c_uimm7lo",
-      "c_uimm7hi"
-    ],
-    "extension": [
-      "rv32_c_f"
-    ],
-    "match": "0x6000",
-    "mask": "0xe003"
-  },
-  "c_fsw": {
-    "encoding": "----------------111-----------00",
-    "variable_fields": [
-      "rs1_p",
-      "rs2_p",
-      "c_uimm7lo",
-      "c_uimm7hi"
-    ],
-    "extension": [
-      "rv32_c_f"
-    ],
-    "match": "0xe000",
-    "mask": "0xe003"
-  },
-  "c_flwsp": {
-    "encoding": "----------------011-----------10",
-    "variable_fields": [
-      "rd",
-      "c_uimm8sphi",
-      "c_uimm8splo"
-    ],
-    "extension": [
-      "rv32_c_f"
-    ],
-    "match": "0x6002",
-    "mask": "0xe003"
-  },
-  "c_fswsp": {
-    "encoding": "----------------111-----------10",
-    "variable_fields": [
-      "c_rs2",
-      "c_uimm8sp_s"
-    ],
-    "extension": [
-      "rv32_c_f"
-    ],
-    "match": "0xe002",
-    "mask": "0xe003"
-  },
-  "c_jal": {
-    "encoding": "----------------001-----------01",
-    "variable_fields": [
-      "c_imm12"
-    ],
-    "extension": [
-      "rv32_c"
-    ],
-    "match": "0x2001",
-    "mask": "0xe003"
-  },
-  "xperm16": {
-    "encoding": "0010100----------110-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv_zbp"
-    ],
-    "match": "0x28006033",
-    "mask": "0xfe00707f"
-  },
-  "lb_aq": {
-    "encoding": "001101-00000-----000-----0101111",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rl"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3400002f",
-    "mask": "0xfdf0707f"
-  },
-  "lh_aq": {
-    "encoding": "001101-00000-----001-----0101111",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rl"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3400102f",
-    "mask": "0xfdf0707f"
-  },
-  "lw_aq": {
-    "encoding": "001101-00000-----010-----0101111",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rl"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3400202f",
-    "mask": "0xfdf0707f"
-  },
-  "ld_aq": {
-    "encoding": "001101-00000-----011-----0101111",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rl"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3400302f",
-    "mask": "0xfdf0707f"
-  },
-  "sb_rl": {
-    "encoding": "00111-1----------000000000101111",
-    "variable_fields": [
-      "rs1",
-      "rs2",
-      "aq"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3a00002f",
-    "mask": "0xfa007fff"
-  },
-  "sh_rl": {
-    "encoding": "00111-1----------001000000101111",
-    "variable_fields": [
-      "rs1",
-      "rs2",
-      "aq"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3a00102f",
-    "mask": "0xfa007fff"
-  },
-  "sw_rl": {
-    "encoding": "00111-1----------010000000101111",
-    "variable_fields": [
-      "rs1",
-      "rs2",
-      "aq"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3a00202f",
-    "mask": "0xfa007fff"
-  },
-  "sd_rl": {
-    "encoding": "00111-1----------011000000101111",
-    "variable_fields": [
-      "rs1",
-      "rs2",
-      "aq"
-    ],
-    "extension": [
-      "rv_zalasr"
-    ],
-    "match": "0x3a00302f",
-    "mask": "0xfa007fff"
-  },
-  "grevi": {
-    "encoding": "011010-----------101-----0010011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "shamtd"
-    ],
-    "extension": [
-      "rv64_zbp"
-    ],
-    "match": "0x68005013",
-    "mask": "0xfc00707f"
-  },
-  "gorci": {
-    "encoding": "001010-----------101-----0010011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "shamtd"
-    ],
-    "extension": [
-      "rv64_zbp"
-    ],
-    "match": "0x28005013",
-    "mask": "0xfc00707f"
-  },
-  "shfli": {
-    "encoding": "0000100----------001-----0010011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "shamtw"
-    ],
-    "extension": [
-      "rv64_zbp"
-    ],
-    "match": "0x8001013",
-    "mask": "0xfe00707f"
-  },
-  "unshfli": {
-    "encoding": "0000100----------101-----0010011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "shamtw"
-    ],
-    "extension": [
-      "rv64_zbp"
-    ],
-    "match": "0x8005013",
-    "mask": "0xfe00707f"
-  },
-  "xperm32": {
-    "encoding": "0010100----------000-----0110011",
-    "variable_fields": [
-      "rd",
-      "rs1",
-      "rs2"
-    ],
-    "extension": [
-      "rv64_zbp"
-    ],
-    "match": "0x28000033",
-    "mask": "0xfe00707f"
-  }
-}
\ No newline at end of file
diff --git a/opcodes_maker/sorter.py b/opcodes_maker/sorter.py
deleted file mode 100644
index f5da4993d..000000000
--- a/opcodes_maker/sorter.py
+++ /dev/null
@@ -1,28 +0,0 @@
-import json
-
-def sort_instr_json(dir_name, outname):
-    with open(dir_name, 'r') as file:
-        data = json.load(file)
-
-    sorted_data = {}
-    for key in sorted(data):
-        entry = data[key]
-        if "variable_fields" in entry:
-            entry["variable_fields"] = sorted(entry["variable_fields"])
-        if "extension" in entry:
-            entry["extension"] = sorted(entry["extension"])
-    
-        # Add the processed entry to the sorted data
-        sorted_data[key] = entry
-
-    with open(outname, 'w') as file:
-        json.dump(sorted_data, file, indent=4)
-    
-    print(json.dumps(sorted_data, indent=4))
-
-def main():
-    sort_instr_json("data.json", "udb_sorted_data.json")
-    sort_instr_json("instr_dict.json", "opcodes_sorted_data.json")
-
-
-main()

From 17a9e7885ff704d23417af57ae4c7e3515ea1aee Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Mon, 3 Feb 2025 13:58:41 +0000
Subject: [PATCH 06/13] Add all riscv-opcodes functionality to the Makefile

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 backends/opcodes_maker/Makefile | 23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)
 mode change 100644 => 100755 backends/opcodes_maker/Makefile

diff --git a/backends/opcodes_maker/Makefile b/backends/opcodes_maker/Makefile
old mode 100644
new mode 100755
index 205e43f3e..c6cdca745
--- a/backends/opcodes_maker/Makefile
+++ b/backends/opcodes_maker/Makefile
@@ -1,16 +1,13 @@
 # Directories
 YAML_DIR ?= ../../arch/inst
-OPCODES_DIR := ../riscv-opcodes
 OUTPUT_DIR := output
 
 # Python scripts
 YAML_TO_JSON := yaml_to_json.py
 GENERATOR := generator.py
 
-# Output files
+# Generated files
 INSTR_DICT := $(OUTPUT_DIR)/instr_dict.json
-
-# Generated output files
 C_OUT := $(OUTPUT_DIR)/encoding.out.h
 CHISEL_OUT := $(OUTPUT_DIR)/inst.chisel
 SPINALHDL_OUT := $(OUTPUT_DIR)/inst.spinalhdl
@@ -19,7 +16,6 @@ RUST_OUT := $(OUTPUT_DIR)/inst.rs
 GO_OUT := $(OUTPUT_DIR)/inst.go
 LATEX_OUT := $(OUTPUT_DIR)/instr-table.tex
 LATEX_PRIV_OUT := $(OUTPUT_DIR)/priv-instr-table.tex
-PROCESSED_DICT := $(OUTPUT_DIR)/processed_instr_dict.json
 
 # Check for required files
 REQUIRED_FILES := $(YAML_TO_JSON) $(GENERATOR)
@@ -39,23 +35,12 @@ $(INSTR_DICT): $(YAML_TO_JSON) | $(OUTPUT_DIR)
 
 # Generate all outputs
 generate: $(INSTR_DICT)
-	python3 $(GENERATOR) $(INSTR_DICT) -c -chisel -rust -go -latex
+	python3 $(GENERATOR) $(INSTR_DICT) -c -chisel -spinalhdl -sverilog -rust -go -latex
 	mv encoding.out.h inst.chisel inst.spinalhdl inst.sverilog inst.rs inst.go \
-	   instr-table.tex priv-instr-table.tex processed_instr_dict.json \
-	   $(OUTPUT_DIR)/ 2>/dev/null || true
+	   instr-table.tex priv-instr-table.tex $(OUTPUT_DIR)/ 2>/dev/null || true
 
 # Clean generated files
 clean:
 	rm -rf $(OUTPUT_DIR)
 
-# Help target
-help:
-	@echo "Available targets:"
-	@echo "  all (default) - Run complete pipeline: YAML -> JSON -> generate"
-	@echo "  generate     - Generate all output formats from JSON"
-	@echo "  clean        - Remove all generated files"
-	@echo ""
-	@echo "All output files will be placed in the '$(OUTPUT_DIR)' directory"
-	@echo "Use YAML_DIR=/path/to/yaml to specify custom YAML input directory"
-
-.PHONY: all generate clean help
+.PHONY: all generate clean

From 9aa1c85bf5f7e7cdd24e72433fe0f89b6cba420c Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Mon, 3 Feb 2025 16:02:28 +0000
Subject: [PATCH 07/13] Update riscv-opcodes submodule to latest master

---
 ext/riscv-opcodes | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/riscv-opcodes b/ext/riscv-opcodes
index 5ce8977a5..9f70bcd37 160000
--- a/ext/riscv-opcodes
+++ b/ext/riscv-opcodes
@@ -1 +1 @@
-Subproject commit 5ce8977a5961a6bbfc1638e6676e60489665d882
+Subproject commit 9f70bcd37db27fddd34b4aa0524b8f19d31e9bb8

From 6dbadd9960fd696ee5e5eafc99355e32afb2a048 Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Mon, 3 Feb 2025 16:15:16 +0000
Subject: [PATCH 08/13] Update Rakefile to add gen:opcode_outputs. Usage  ./do
 gen:opcode_outputs YAML_DIR=optional_path

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 Rakefile | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/Rakefile b/Rakefile
index 40b2c220e..be4641907 100644
--- a/Rakefile
+++ b/Rakefile
@@ -10,6 +10,7 @@ require "yard"
 require "minitest/test_task"
 
 require_relative $root / "lib" / "architecture"
+$opcode_outputs = $root / "gen" / "opcodes_outputs"
 
 directory "#{$root}/.stamps"
 
@@ -39,6 +40,28 @@ file "#{$root}/.stamps/dev_gems" => ["#{$root}/.stamps"] do |t|
   FileUtils.touch t.name
 end
 
+namespace :gen do
+  desc "Generate opcode outputs, optionally specify YAML_DIR=path/to/yaml"
+  task :opcode_outputs do
+    yaml_dir = ENV['YAML_DIR'] || "#{$root}/arch/inst"
+    mkdir_p $opcode_outputs
+    sh "#{$root}/.home/.venv/bin/python3 #{$root}/backends/opcodes_maker/yaml_to_json.py #{yaml_dir} #{$opcode_outputs}"
+    sh "#{$root}/.home/.venv/bin/python3 #{$root}/backends/opcodes_maker/generator.py #{$opcode_outputs}/instr_dict.json -c -chisel -spinalhdl -sverilog -rust -go -latex"
+
+    # Move generated files to output dir
+    Dir.chdir("#{$root}") do
+      mv "encoding.out.h", "#{$opcode_outputs}/", force: true
+      mv "inst.chisel", "#{$opcode_outputs}/", force: true
+      mv "inst.spinalhdl", "#{$opcode_outputs}/", force: true
+      mv "inst.sverilog", "#{$opcode_outputs}/", force: true
+      mv "inst.rs", "#{$opcode_outputs}/", force: true
+      mv "inst.go", "#{$opcode_outputs}/", force: true
+      mv "instr-table.tex", "#{$opcode_outputs}/", force: true
+      mv "priv-instr-table.tex", "#{$opcode_outputs}/", force: true
+    end
+  end
+ end
+
 namespace :gen do
   desc "Generate documentation for the ruby tooling"
   task tool_doc: "#{$root}/.stamps/dev_gems" do

From 6d069c95ef599c39e1b18381a3d30c0af3ad1cd5 Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Tue, 4 Feb 2025 18:40:04 +0000
Subject: [PATCH 09/13] Add opcode generation to github actions; specifically,
 to the regress test

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 .github/workflows/regress.yml | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/.github/workflows/regress.yml b/.github/workflows/regress.yml
index 83f06dc2f..0a32857b3 100644
--- a/.github/workflows/regress.yml
+++ b/.github/workflows/regress.yml
@@ -185,3 +185,32 @@ jobs:
         run: ./bin/build_container
       - name: Generate extension PDF
         run: ./do gen:profile[MockProfileRelease]
+
+  regress-gen-opcode:
+    runs-on: ubuntu-latest
+    env:
+      SINGULARITY: 1
+    steps:
+      - name: Clone Github Repo Action
+        uses: actions/checkout@v4
+      - name: Setup apptainer
+        uses: eWaterCycle/setup-apptainer@v2.0.0
+      - name: Get container from cache
+        id: cache-sif
+        uses: actions/cache@v4
+        with:
+          path: .singularity/image.sif
+          key: ${{ hashFiles('container.def', 'bin/.container-tag') }}
+      - name: Get gems and node files from cache
+        id: cache-bundle-npm
+        uses: actions/cache@v4
+        with:
+          path: |
+            .home/.gems
+            node_modules
+          key: ${{ hashFiles('Gemfile.lock') }}-${{ hashFiles('package-lock.json') }}
+      - if: ${{ steps.cache-sif.outputs.cache-hit != 'true' }}
+        name: Build container
+        run: ./bin/build_container
+      - name: Generate opcode outputs
+        run: ./do gen:opcode_outputs

From 769b5b14f96565958561bc5a7a28a0f1a4e05a7c Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Tue, 4 Feb 2025 19:34:02 +0000
Subject: [PATCH 10/13] Add opcode generation to regress on Rakefile

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 Rakefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Rakefile b/Rakefile
index be4641907..831899dea 100644
--- a/Rakefile
+++ b/Rakefile
@@ -342,6 +342,8 @@ namespace :test do
 
     Rake::Task["gen:html"].invoke("generic_rv64")
 
+    Rake::Task["gen:opcode_outputs"].invoke
+
     Rake::Task["#{$root}/gen/certificate_doc/pdf/MockCertificateModel.pdf"].invoke
     Rake::Task["#{$root}/gen/profile_doc/pdf/MockProfileRelease.pdf"].invoke
 

From 1843f808b2fd5c5549ceda620c5f006aa62e45e3 Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Tue, 4 Feb 2025 20:29:48 +0000
Subject: [PATCH 11/13] Add riscv-opcodes to GHA and cache it

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 .github/workflows/regress.yml | 66 ++++++++++++++++++++---------------
 1 file changed, 38 insertions(+), 28 deletions(-)

diff --git a/.github/workflows/regress.yml b/.github/workflows/regress.yml
index 0a32857b3..e9ee24869 100644
--- a/.github/workflows/regress.yml
+++ b/.github/workflows/regress.yml
@@ -185,32 +185,42 @@ jobs:
         run: ./bin/build_container
       - name: Generate extension PDF
         run: ./do gen:profile[MockProfileRelease]
-
   regress-gen-opcode:
-    runs-on: ubuntu-latest
-    env:
-      SINGULARITY: 1
-    steps:
-      - name: Clone Github Repo Action
-        uses: actions/checkout@v4
-      - name: Setup apptainer
-        uses: eWaterCycle/setup-apptainer@v2.0.0
-      - name: Get container from cache
-        id: cache-sif
-        uses: actions/cache@v4
-        with:
-          path: .singularity/image.sif
-          key: ${{ hashFiles('container.def', 'bin/.container-tag') }}
-      - name: Get gems and node files from cache
-        id: cache-bundle-npm
-        uses: actions/cache@v4
-        with:
-          path: |
-            .home/.gems
-            node_modules
-          key: ${{ hashFiles('Gemfile.lock') }}-${{ hashFiles('package-lock.json') }}
-      - if: ${{ steps.cache-sif.outputs.cache-hit != 'true' }}
-        name: Build container
-        run: ./bin/build_container
-      - name: Generate opcode outputs
-        run: ./do gen:opcode_outputs
+      runs-on: ubuntu-latest
+      env:
+        SINGULARITY: 1
+      steps:
+        - name: Clone Github Repo Action
+          uses: actions/checkout@v4
+        - name: Cache riscv-opcodes submodule
+          id: cache-opcodes
+          uses: actions/cache@v4
+          with:
+            path: ext/riscv-opcodes
+            key: ${{ runner.os }}-submodule-riscv-opcodes-${{ hashFiles('.gitmodules') }}
+        - if: steps.cache-opcodes.outputs.cache-hit != 'true'
+          name: Checkout riscv-opcodes submodule
+          run: |
+            git submodule init ext/riscv-opcodes
+            git submodule update ext/riscv-opcodes
+        - name: Setup apptainer
+          uses: eWaterCycle/setup-apptainer@v2.0.0
+        - name: Get container from cache
+          id: cache-sif
+          uses: actions/cache@v4
+          with:
+            path: .singularity/image.sif
+            key: ${{ hashFiles('container.def', 'bin/.container-tag') }}
+        - name: Get gems and node files from cache
+          id: cache-bundle-npm
+          uses: actions/cache@v4
+          with:
+            path: |
+              .home/.gems
+              node_modules
+            key: ${{ hashFiles('Gemfile.lock') }}-${{ hashFiles('package-lock.json') }}
+        - if: ${{ steps.cache-sif.outputs.cache-hit != 'true' }}
+          name: Build container
+          run: ./bin/build_container
+        - name: Generate opcode outputs
+          run: ./do gen:opcode_outputs

From 5296964a76f606fa88f05690fc8be59e4115c6ad Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Fri, 14 Feb 2025 12:59:14 +0000
Subject: [PATCH 12/13] Add fieldo.js created by Aliaksei Chapyzhenka, @drom

---
 backends/opcodes_maker/fieldo.js | 153 +++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 backends/opcodes_maker/fieldo.js

diff --git a/backends/opcodes_maker/fieldo.js b/backends/opcodes_maker/fieldo.js
new file mode 100644
index 000000000..d7d661548
--- /dev/null
+++ b/backends/opcodes_maker/fieldo.js
@@ -0,0 +1,153 @@
+'use strict';
+
+const fieldo = {
+  fd:           {msb: 11, lsb:  7, kind: 'fr', prio: 10,            dst: true, count: 0},
+  fs1:          {msb: 19, lsb: 15, kind: 'fr', prio: 20,            src: true, count: 0},
+  fs2:          {msb: 24, lsb: 20, kind: 'fr', prio: 30,            src: true, count: 0},
+  fs3:          {msb: 31, lsb: 27, kind: 'fr', prio: 40,            src: true, count: 0},
+
+  rd:           {msb: 11, lsb:  7, kind: 'xr', prio: 10,            dst: true, count: 753},
+  rs1:          {msb: 19, lsb: 15, kind: 'xr', prio: 20,            src: true, count: 1007},
+  rs2:          {msb: 24, lsb: 20, kind: 'xr', prio: 30,            src: true, count: 501},
+  rs3:          {msb: 31, lsb: 27, kind: 'xr', prio: 40,            src: true, count: 26},
+
+  rm:           {msb: 14, lsb: 12, kind: 'rm',                      count: 80},
+  shamtq:       {msb: 26, lsb: 20, bits: [6, 5, 4, 3, 2, 1, 0],     count: 6},
+  shamtd:       {msb: 25, lsb: 20, bits: [5, 4, 3, 2, 1, 0],        count: 17},
+  shamtw:       {msb: 24, lsb: 20, bits: [4, 3, 2, 1, 0],           count: 29},
+  shamtw4:      {msb: 23, lsb: 20, bits: [3, 2, 1, 0],              count: 2},
+
+  imm12:        {msb: 31, lsb: 20, bits: [11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0], kind: 'sext', count: 23},
+
+  imm12lo:      {msb: 11, lsb:  7, bits: [4, 3, 2, 1, 0],           count: 9},
+  imm12hi:      {msb: 31, lsb: 25, bits: [11, 10, 9, 8, 7, 6, 5],   count: 12},
+
+  imm20:        {msb: 31, lsb: 12, bits: [31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12], count: 2},
+  jimm20:       {msb: 31, lsb: 12, bits: [20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 11, 19, 18, 17, 16, 15, 14, 13, 12], count: 1},
+
+  // vector
+  vd:           {msb: 11, lsb:  7, kind: 'vr', prio: 10,            dst: true, count: 412},
+  vs1:          {msb: 19, lsb: 15, kind: 'vr', prio: 40,            src: true, count: 128},
+  vs2:          {msb: 24, lsb: 20, kind: 'vr', prio: 30,            src: true, count: 380},
+  vs3:          {msb: 11, lsb:  7, kind: 'vr', prio: 20,            src: true, dst: true, count: 38},
+  vm:           {msb: 25, lsb: 25,                                  count: 395},
+  nf:           {msb: 31, lsb: 29,                                  count: 72},
+  wd:           {msb: 26, lsb: 26,                                  count: 36},
+
+  simm5:        {msb: 19, lsb: 15, bits: [4, 3, 2, 1, 0],           kind: 'sext', count: 30},
+  zimm5:        {msb: 19, lsb: 15},
+
+  fd_p:         {msb:  4, lsb:  2, kind: 'frc', prio: 10,           dst: true, count: 10},
+  fs2_p:        {msb:  4, lsb:  2, kind: 'frc', prio: 30,           src: true, count: 15},
+  c_fs2:        {msb:  6, lsb:  2, kind: 'fr',  prio: 30,           src: true, count: 6},
+
+  rs1_p:        {msb:  9, lsb:  7, kind: 'xrc', prio: 20,           src: true, count: 19},
+  rs2_p:        {msb:  4, lsb:  2, kind: 'xrc', prio: 30,           src: true, count: 15},
+  rd_p:         {msb:  4, lsb:  2, kind: 'xrc', prio: 10,           dst: true, count: 10},
+  rd_rs1_n0:    {msb: 11, lsb:  7, kind: 'xr',  prio: 10,           dst: true, src: true, count: 3},
+  rd_rs1_p:     {msb:  9, lsb:  7, kind: 'xrc', prio: 10,           dst: true, src: true, count: 18},
+  rd_rs1:       {msb: 11, lsb:  7, kind: 'xr',  prio: 10,           dst: true, count: 3},
+  rd_n2:        {msb: 11, lsb:  7, kind: 'xr',  prio: 10,           dst: true, count: 1},
+  rd_n0:        {msb: 11, lsb:  7, kind: 'xr',  prio: 10,           dst: true, count: 3},
+  rs1_n0:       {msb: 11, lsb:  7, kind: 'xr',  prio: 20,           src: true, count: 1},
+  c_rs2_n0:     {msb:  6, lsb:  2, kind: 'xr',  prio: 30,           src: true, count: 2},
+  c_rs1_n0:     {msb: 11, lsb:  7, kind: 'xr',  prio: 20,           src: true, count: 1},
+  c_rs2:        {msb:  6, lsb:  2, kind: 'xr',  prio: 30,           src: true, count: 6},
+  c_sreg1:      {msb:  9, lsb:  7, kind: 'xrc', prio: 20,           src: true, count: 2},
+  c_sreg2:      {msb:  4, lsb:  2, kind: 'xrc', prio: 30,           src: true, count: 2},
+
+  aq:           {msb: 26, lsb: 26,                                  count: 22},
+  rl:           {msb: 25, lsb: 25,                                  count: 22},
+
+  // Compact Immediate Literals
+  c_nzuimm10:   {msb: 12, lsb:  5, bits: [5, 4, 9, 8, 7, 6, 2, 3],  count: 1},
+
+  c_uimm7lo:    {msb:  6, lsb:  5, bits: [2, 6],                    count: 4},
+  c_uimm7hi:    {msb: 12, lsb: 10, bits: [5, 4, 3],                 count: 4},
+
+  c_nzimm6lo:   {msb:  6, lsb:  2, bits: [4, 3, 2, 1, 0],           count: 2},
+  c_nzimm6hi:   {msb: 12, lsb: 12, bits: [5],                       count: 2},
+
+  c_imm6lo:     {msb:  6, lsb:  2, bits: [4, 3, 2, 1, 0],           count: 4},
+  c_imm6hi:     {msb: 12, lsb: 12, bits: [5], kind: 'sext',         count: 4},
+
+  c_nzimm10lo:  {msb:  6, lsb:  2, bits: [4, 6, 8, 7, 5],           count: 1},
+  c_nzimm10hi:  {msb: 12, lsb: 12, bits: [9],                       count: 1},
+
+  c_nzimm18lo:  {msb:  6, lsb:  2, bits: [16, 15, 14, 13, 12],      count: 1},
+  c_nzimm18hi:  {msb: 12, lsb: 12, bits: [17],                      count: 1},
+
+  c_imm12:      {msb: 12, lsb:  2, bits: [11, 4, 9, 8, 10, 6, 7, 3, 2, 1, 5], count: 2},
+
+  c_bimm9lo:    {msb:  6, lsb:  2, bits: [7, 6, 2, 1, 5],           count: 2},
+  c_bimm9hi:    {msb: 12, lsb: 10, bits: [8, 4, 3],                 count: 2},
+
+  c_uimm8splo:  {msb:  6, lsb:  2, bits: [4, 3, 2, 7, 6],           count: 2},
+  c_uimm8sphi:  {msb: 12, lsb: 12, bits: [5],                       count: 2},
+
+  c_uimm8sp_s:  {msb: 12, lsb:  7, bits: [5, 4, 3, 2, 7, 6],        count: 2},
+
+  c_nzuimm5:    {msb:  6, lsb:  2, bits: [4, 3, 2, 1, 0],           count: 2},
+
+  c_nzuimm6lo:  {msb:  6, lsb:  2, bits: [4, 3, 2, 1, 0],           count: 4},
+  c_nzuimm6hi:  {msb: 12, lsb: 12, bits: [5],                       count: 3},
+
+  c_uimm8lo:    {msb:  6, lsb:  5, bits: [7, 6],                    count: 6},
+  c_uimm8hi:    {msb: 12, lsb: 10, bits: [5, 4, 3],                 count: 6},
+
+  c_uimm9splo:  {msb:  6, lsb:  2, bits: [4, 5, 8, 7, 6],           count: 3},
+  c_uimm9sphi:  {msb: 12, lsb: 12, bits: [5],                       count: 3},
+
+  c_uimm9sp_s:  {msb: 12, lsb:  7, bits: [5, 4, 3, 8, 7, 6],        count: 3},
+
+  c_uimm2:      {msb:  6, lsb:  5,                                  count: 2},
+  c_uimm1:      {msb:  5, lsb:  5,                                  count: 3},
+  c_spimm:      {msb:  3, lsb:  2,                                  count: 4},
+  c_uimm9lo:    {msb:  6, lsb:  5,                                  count: 2},
+  c_uimm9hi:    {msb: 12, lsb: 10,                                  count: 2},
+  c_uimm10splo: {msb:  6, lsb:  2,                                  count: 1},
+  c_uimm10sphi: {msb: 12, lsb: 12,                                  count: 1},
+  c_uimm10sp_s: {msb: 12, lsb:  7,                                  count: 1},
+  c_index:      {msb:  9, lsb:  2,                                  count: 1},
+  c_rlist:      {msb:  7, lsb:  4,                                  count: 4},
+
+  bs:           {msb: 31, lsb: 30, count: 6}, // byte select for RV32K AES
+  rnum:         {msb: 23, lsb: 20, count: 1},
+
+  bimm12hi:     {msb: 31, lsb: 25, bits: [12, 10, 9, 8, 7, 6, 5],   count: 6},
+  bimm12lo:     {msb: 11, lsb:  7, bits: [4, 3, 2, 1, 11],          count: 6},
+
+  fm:           {msb: 31, lsb: 28, kind: 'fm',                      count: 1},
+  pred:         {msb: 27, lsb: 24, kind: 'pred',                    count: 1},
+  succ:         {msb: 23, lsb: 20, kind: 'succ',                    count: 1},
+
+  csr:          {msb: 31, lsb: 20, kind: 'csr',                     count: 6},
+
+  zimm:         {msb: 19, lsb: 15,                                  count: 6},
+  zimm10:       {msb: 29, lsb: 20, kind: 'vtypei', count: 1},
+  zimm11:       {msb: 30, lsb: 20, kind: 'vtypei', count: 1},
+
+  zimm6hi:      {msb: 26, lsb: 26},
+  zimm6lo:      {msb: 19, lsb: 15},
+
+  // rv32_zpn
+  imm2:         {msb: 21, lsb: 20,                                  count: 1},
+  // rv_zpn
+  imm3:         {msb: 22, lsb: 20,                                  count: 9},
+  imm4:         {msb: 23, lsb: 20,                                  count: 8},
+  imm5:         {msb: 24, lsb: 20,                                  count: 11},
+  imm6:         {msb: 25, lsb: 20,                                  count: 1},
+
+  mop_r_t_30:     {msb: 30, lsb: 30},
+  mop_r_t_27_26:  {msb: 27, lsb: 26},
+  mop_r_t_21_20:  {msb: 21, lsb: 20},
+  mop_rr_t_30:    {msb: 30, lsb: 30},
+  mop_rr_t_27_26: {msb: 27, lsb: 26},
+
+  c_mop_t:        {msb: 10, lsb: 8},
+
+};
+
+module.exports = fieldo;
+
+/* eslint camelcase: 0 */

From 426ae2448d4dc3ea1e44a923ce1d56a1bf04cf15 Mon Sep 17 00:00:00 2001
From: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
Date: Fri, 14 Feb 2025 13:45:13 +0000
Subject: [PATCH 13/13] Update script to use fieldo.js to find immediates

Signed-off-by: Afonso Oliveira <Afonso.Oliveira@synopsys.com>
---
 backends/opcodes_maker/yaml_to_json.py | 171 ++++++++++++++++++++++---
 1 file changed, 150 insertions(+), 21 deletions(-)
 mode change 100644 => 100755 backends/opcodes_maker/yaml_to_json.py

diff --git a/backends/opcodes_maker/yaml_to_json.py b/backends/opcodes_maker/yaml_to_json.py
old mode 100644
new mode 100755
index 93c55182e..ae7a280b2
--- a/backends/opcodes_maker/yaml_to_json.py
+++ b/backends/opcodes_maker/yaml_to_json.py
@@ -1,42 +1,171 @@
-#!/usr/bin/env python3
-
+import re
 from typing import List, Dict, Union, Any
+import argparse
 import os
+import sys
 import yaml
 import json
-import argparse
-import sys
+from typing import List, Dict, Union
+import subprocess
+
+
+def load_fieldo() -> dict:
+    """
+    Load the fieldo mapping from the JavaScript file (fieldo.js) by invoking Node.js.
+
+    """
+    this_dir = os.path.dirname(os.path.abspath(__file__))
+    # The command runs Node.js in the current directory and prints the JSON representation.
+    cmd = ["node", "-e", 'console.log(JSON.stringify(require("./fieldo.js")));']
+    output = subprocess.check_output(cmd, cwd=this_dir)
+    return json.loads(output)
+
+
+# Set of register names that need transformation.
+reg_names = {"qs1", "qs2", "qd", "fs1", "fs2", "fd"}
+fieldo = load_fieldo()
 
 
 def range_size(range_str: str) -> int:
+    """Compute the bit width from a range string like '31-20'."""
     try:
         end, start = map(int, range_str.split("-"))
         return abs(end - start) + 1
-    except ValueError:
+    except Exception:
         return 0
 
 
-reg_names = {"qs1", "qs2", "qd", "fs1", "fs2", "fd"}
-
-
-def GetVariables(vars: List[Dict[str, str]]) -> List[str]:
-    var_names = []
-    for var in vars:
+def lookup_immediate_by_range(
+    var_base: str, high: int, low: int, instr_name: str
+) -> Union[str, None]:
+    """
+    Look up a canonical field name from the fieldo mapping based on the bit range.
+
+    - If var_base is "imm", then we consider any field whose name contains "imm"
+      (but not starting with "c_" and not "csr").
+    - If var_base starts with "c_", then only keys starting with "c_" are considered.
+    - Otherwise, we require that the key starts with var_base (for "simm", "jimm", etc.).
+
+    If multiple candidates are found and var_base is "imm", we prefer "zimm" if present.
+    Otherwise, instr_name is used as a hint.
+    """
+    candidates = []
+    for key, field in fieldo.items():
+        if field.get("msb") == high and field.get("lsb") == low:
+            if var_base == "imm":
+                if "imm" in key and not key.startswith("c_") and key != "csr":
+                    candidates.append(key)
+            elif var_base.startswith("c_"):
+                if key.startswith("c_"):
+                    candidates.append(key)
+            else:
+                if key.startswith(var_base):
+                    candidates.append(key)
+    if candidates:
+        if len(candidates) == 1:
+            return candidates[0]
+        else:
+            if var_base == "imm" and "zimm" in candidates:
+                return "zimm"
+            lower_instr = instr_name.lower()
+            for cand in candidates:
+                if lower_instr.startswith("j") and cand.startswith("jimm"):
+                    return cand
+                if lower_instr.startswith("b") and cand.startswith("bimm"):
+                    return cand
+            return candidates[0]
+    return None
+
+
+def canonical_immediate_names(
+    var_name: str, location: str, instr_name: str
+) -> List[str]:
+    """
+    Given a YAML immediate variable (its base name and location), return a list of canonical
+    field names strictly from the fieldo mapping.
+
+    - For non-composite locations (e.g. "31-20"), the range is parsed and a lookup is performed.
+    - For composite locations (detected by "|" in the location), we assume a branch-immediate split:
+      the high part uses the range (31, 25) and the low part (11, 7), with an appropriate prefix.
+    - If no candidate is found in fieldo, an empty list is returned.
+    """
+    if "|" in location:
+        parts = location.split("|")
+        if len(parts) == 4:
+            prefix = "bimm" if instr_name.lower().startswith("b") else "imm"
+            hi_candidate = lookup_immediate_by_range(prefix, 31, 25, instr_name)
+            lo_candidate = lookup_immediate_by_range(prefix, 11, 7, instr_name)
+            if hi_candidate is None or lo_candidate is None:
+                print(
+                    f"Warning: composite immediate candidate not found in fieldo for {var_name} with location {location}"
+                )
+                return []
+            return [hi_candidate, lo_candidate]
+        else:
+            # For other composite formats, attempt a basic lookup using the first two numbers.
+            nums = list(map(int, re.findall(r"\d+", location)))
+            if len(nums) >= 2:
+                high, low = nums[0], nums[1]
+                candidate = lookup_immediate_by_range(var_name, high, low, instr_name)
+                if candidate:
+                    return [candidate]
+            print(
+                f"Warning: composite immediate candidate not found in fieldo for {var_name} with location {location}"
+            )
+            return []
+    else:
+        try:
+            high, low = map(int, location.split("-"))
+        except Exception:
+            print(f"Warning: invalid immediate location {location} for {var_name}")
+            return []
+        candidate = lookup_immediate_by_range(var_name, high, low, instr_name)
+        if candidate:
+            return [candidate]
+        else:
+            print(
+                f"Warning: No fieldo canonical name for {var_name} with range {location}"
+            )
+            return []
+
+
+def GetVariables(vars: List[Dict[str, str]], instr_name: str = "") -> List[str]:
+    """
+    Process the YAML variable definitions and return a list of variable names as expected by the generator.
+
+    - For registers (names in reg_names), the first character is replaced with "r".
+    - For "shamt", the field is renamed to "shamtw" if its width is 5 or "shamtd" if 6.
+    - For immediates (base names "imm", "simm", "zimm", "jimm", or those starting with "c_"),
+      the canonical names are determined strictly by looking them up in fieldo.
+      Only names found in fieldo are used.
+
+    The variables are processed in reverse order.
+    """
+    result = []
+    for var in reversed(vars):
         var_name = var["name"]
+        location = var.get("location", "")
         if var_name in reg_names:
-            # Since strings are immutable.
-            lst_var_name = list(var_name)
-            lst_var_name[0] = "r"
-            var_name = "".join(lst_var_name)
+            result.append("r" + var_name[1:])
         elif var_name == "shamt":
-            size = range_size(var["location"])
+            size = range_size(location)
             if size == 5:
-                var_name = "shamtw"
+                result.append("shamtw")
             elif size == 6:
-                var_name = "shamtd"
-        var_names.append(var_name)
-    var_names.reverse()
-    return var_names
+                result.append("shamtd")
+            else:
+                result.append(var_name)
+        elif var_name in ("imm", "simm", "zimm", "jimm") or var_name.startswith("c_"):
+            canon_names = canonical_immediate_names(var_name, location, instr_name)
+            if canon_names:
+                result.extend(canon_names)
+            else:
+                print(
+                    f"Warning: Skipping immediate field {var_name} with location {location} since no fieldo mapping was found."
+                )
+        else:
+            result.append(var_name)
+    return result
 
 
 def BitStringToHex(bit_str: str) -> str: