27 lines
935 B
Python
27 lines
935 B
Python
from .insn import *
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"""
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RV64M R-Type Instruction
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"""
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class InsnRV64MRType(Insn):
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def __init__(self, params, funct3):
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super().__init__(params)
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self.funct3 = funct3
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def elaborate(self, platform):
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m = super().elaborate(platform)
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if self.params.csr_misa:
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m.d.comb += self.misa_ok.eq((self.rvfi_csr_misa_rdata & 0x1000) == 0x1000)
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m.d.comb += self.spec_csr_misa_rmask.eq(0x1000)
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else:
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m.d.comb += self.misa_ok.eq(1)
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m.d.comb += self.spec_valid.eq(self.rvfi_valid & (~self.insn_padding) & (self.insn_funct7 == 0b0000001) & (self.insn_funct3 == self.funct3) & (self.insn_opcode == 0b0111011))
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m.d.comb += self.spec_rs1_addr.eq(self.insn_rs1)
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m.d.comb += self.spec_rs2_addr.eq(self.insn_rs2)
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m.d.comb += self.spec_rd_addr.eq(self.insn_rd)
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m.d.comb += self.spec_pc_wdata.eq(self.rvfi_pc_rdata + 4)
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return m
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