[ISAC] Add Zacas support (#583)

Co-authored-by: Umer Shahid <[email protected]>
riscv-non-isa · Jan 1, 2025 · 6418806 · 6418806
1 parent 076ce72
commit 6418806
Showing 1 changed file with 25 additions and 16 deletions.
diff --git a/riscv-isac/riscv_isac/plugins/internaldecoder.py b/riscv-isac/riscv_isac/plugins/internaldecoder.py
@@ -1607,6 +1607,12 @@ def rv64i_arith_ops(self, instrObj):
             0b11100: 'amomaxu.d'
     }
 
+    zacas_instr_names = {
+            0b010: 'zacas.w',
+            0b011: 'zacas.d',
+            0b100: 'zacas.q',
+    }
+
     def rv64_rv32_atomic_ops(self, instrObj):
 
         instr = instrObj.instr
@@ -1625,25 +1631,28 @@ def rv64_rv32_atomic_ops(self, instrObj):
         instrObj.rl = rl
         instrObj.aq = aq
 
-        #RV32A instructions
-        if funct3 == 0b010:
-            if funct5 == 0b00010:
-                instrObj.rs2 = None
-                instrObj.instr_name = self.rv32a_instr_names[funct5]
-            else:
-                instrObj.instr_name = self.rv32a_instr_names[funct5]
+        if funct5 == 0b00101:
+            instrObj.instr_name = self.zacas_instr_names[funct3]
+        else:
+            #RV32A instructions
+            if funct3 == 0b010:
+                if funct5 == 0b00010:
+                    instrObj.rs2 = None
+                    instrObj.instr_name = self.rv32a_instr_names[funct5]
+                else:
+                    instrObj.instr_name = self.rv32a_instr_names[funct5]
 
-            return instrObj
+                return instrObj
 
-        #RV64A instructions
-        if funct3 == 0b011:
-            if funct5 == 0b00010:
-                instrObj.rs2 = None
-                instrObj.instr_name = self.rv64a_instr_names[funct5]
-            else:
-                instrObj.instr_name = self.rv64a_instr_names[funct5]
+            #RV64A instructions
+            if funct3 == 0b011:
+                if funct5 == 0b00010:
+                    instrObj.rs2 = None
+                    instrObj.instr_name = self.rv64a_instr_names[funct5]
+                else:
+                    instrObj.instr_name = self.rv64a_instr_names[funct5]
 
-            return instrObj
+        return instrObj
 
     def flw_fld(self, instrObj):
         instr = instrObj.instr