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[ISAC] Add Zimop decoder #596

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[ISAC] Add Zimop decoder #596

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81 changes: 81 additions & 0 deletions riscv-isac/riscv_isac/plugins/internaldecoder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1407,6 +1407,8 @@ def priviledged_ops(self, instrObj):
instrObj.instr_name = 'csrrci'
instrObj.rs1 = None
instrObj.zimm = rs1[0]
if funct3 == 0b100:
self.rv64_zimop_ops(instrObj)

return instrObj

Expand Down Expand Up @@ -1613,6 +1615,85 @@ def rv64i_arith_ops(self, instrObj):
0b100: 'zacas.q',
}

zimop_r_instr_names = {
0b00000: "mop.r.0",
0b00001: "mop.r.1",
0b00010: "mop.r.2",
0b00011: "mop.r.3",
0b00100: "mop.r.4",
0b00101: "mop.r.5",
0b00110: "mop.r.6",
0b00111: "mop.r.7",
0b01000: "mop.r.8",
0b01001: "mop.r.9",
0b01010: "mop.r.10",
0b01011: "mop.r.11",
0b01100: "mop.r.12",
0b01101: "mop.r.13",
0b01110: "mop.r.14",
0b01111: "mop.r.15",
0b10000: "mop.r.16",
0b10001: "mop.r.17",
0b10010: "mop.r.18",
0b10011: "mop.r.19",
0b10100: "mop.r.20",
0b10101: "mop.r.21",
0b10110: "mop.r.22",
0b10111: "mop.r.23",
0b11000: "mop.r.24",
0b11001: "mop.r.25",
0b11010: "mop.r.26",
0b11011: "mop.r.27",
0b11100: "mop.r.28",
0b11101: "mop.r.29",
0b11110: "mop.r.30",
0b11111: "mop.r.31"
}

zimop_rr_instr_names = {
0b000: "mop.rr.0",
0b001: "mop.rr.1",
0b010: "mop.rr.2",
0b011: "mop.rr.3",
0b100: "mop.rr.4",
0b101: "mop.rr.5",
0b110: "mop.rr.6",
0b111: "mop.rr.7"
}

def rv64_zimop_ops(self, instrObj):
instr = instrObj.instr
isR = (instr & 0x0001d000) >> 22
if isR == 0b0111:
self.rv64_zimop_r_ops(instrObj)
else:
self.rv64_zimop_rr_ops(instrObj)

def rv64_zimop_r_ops(self, instrObj):
instr = instrObj.instr
rd = ((instr & self.RD_MASK) >> 7, 'x')
rs1 = ((instr & self.RS1_MASK) >> 15, 'x')
instrObj.rd = rd
instrObj.rs1 = rs1
mop_30 = (instr & 0x80000000) >> 30
mop_27_26 = (instr & 0x0c000000) >> 26
mop_21_20 = (instr & 0x00030000) >> 20
mop = mop_30 << 4 | mop_27_26 << 2 | mop_21_20
instrObj.instr_name = self.zimop_r_instr_names[mop]

def rv64_zimop_rr_ops(self, instrObj):
instr = instrObj.instr
rd = ((instr & self.RD_MASK) >> 7, 'x')
rs1 = ((instr & self.RS1_MASK) >> 15, 'x')
rs2 = ((instr & self.RS2_MASK) >> 20, 'x')
instrObj.rd = rd
instrObj.rs1 = rs1
instrObj.rs2 = rs2
mop_30 = (instr & 0x80000000) >> 30
mop_27_26 = (instr & 0x0c000000) >> 26
mop = mop_30 << 2 | mop_27_26
instrObj.instr_name = self.zimop_rr_instr_names[mop]

def rv64_rv32_atomic_ops(self, instrObj):

instr = instrObj.instr
Expand Down