M-Labs/riscv-formal-nmigen
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Add SRLI instruction

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This commit is contained in:
Donald Sebastian Leung 2020-08-10 12:35:49 +08:00
parent 031f335325
commit 9740470c47
1 changed files with 15 additions and 0 deletions
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insns/InsnSrli.py Normal file
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from InsnRV32IITypeShift import *
"""
SRLI instruction
"""
class InsnSrli(InsnRV32IITypeShift):
def __init__(self, RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA, RISCV_FORMAL_COMPRESSED):
super().__init__(RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA, RISCV_FORMAL_COMPRESSED, 0b000000, 0b101)
def elaborate(self, platform):
m = super().elaborate(platform)
m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, self.rvfi_rs1_rdata >> self.insn_shamt, 0))
return m