25 lines
971 B
Python
25 lines
971 B
Python
from insn_general import *
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class rvfi_insn_U_type(rvfi_insn_general):
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def __init__(self, RISCV_FORMAL_ILEN=32, RISCV_FORMAL_XLEN=32):
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super(rvfi_insn_U_type, self).__init__(RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN)
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self.insn_padding = Signal(self.RISCV_FORMAL_ILEN)
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self.insn_imm = Signal(self.RISCV_FORMAL_XLEN)
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self.insn_rd = Signal(5)
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self.insn_opcode = Signal(7)
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self.misa_ok = Signal(1)
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def ports(self):
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return super(rvfi_insn_U_type, self).ports()
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def elaborate(self, platform):
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m = super(rvfi_insn_U_type, self).elaborate(platform)
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# U-type instruction format
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m.d.comb += self.insn_padding.eq(self.rvfi_insn >> 32)
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m.d.comb += self.insn_imm.eq(Value.as_signed(self.rvfi_insn[12:32] << 12))
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m.d.comb += self.insn_rd.eq(self.rvfi_insn[7:12])
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m.d.comb += self.insn_opcode.eq(self.rvfi_insn[:7])
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m.d.comb += self.misa_ok.eq(1)
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return m
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