19 lines
792 B
Python
19 lines
792 B
Python
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from .insn_rv32m_r_type import *
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"""
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DIV instruction
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"""
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class InsnDiv(InsnRV32MRType):
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def __init__(self, params):
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super().__init__(params, 0b100)
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def elaborate(self, platform):
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m = super().elaborate(platform)
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if self.params.altops:
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m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, (self.rvfi_rs1_rdata - self.rvfi_rs2_rdata) ^ 0x29bbf66f7f8529ec, 0))
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else:
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m.d.comb += self.spec_rd_wdata.eq(Mux(self.spec_rd_addr, Mux(self.rvfi_rs2_rdata == 0, 2 ** self.params.xlen - 1, Mux((self.rvfi_rs1_rdata == (1 << (self.params.xlen - 1))) & (self.rvfi_rs2_rdata == 2 ** self.params.xlen - 1), 1 << (self.params.xlen - 1), Value.as_signed(self.rvfi_rs1_rdata) // Value.as_signed(self.rvfi_rs2_rdata))), 0))
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return m
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