Add SB instruction

This commit is contained in:
Donald Sebastian Leung 2020-08-03 14:23:40 +08:00
parent eebb39ee27
commit 84454e7048
1 changed files with 23 additions and 0 deletions

23
insns/insn_sb.py Normal file
View File

@ -0,0 +1,23 @@
from insn_S import *
class rvfi_insn_sb(rvfi_insn_S):
def __init__(self):
super(rvfi_insn_sb, self).__init__()
def ports(self):
return super(rvfi_insn_sb, self).ports()
def elaborate(self, platform):
m = super(rvfi_insn_sb, self).elaborate(platform)
# SB instruction
addr = Signal(32)
m.d.comb += addr.eq(self.rvfi_rs1_rdata + self.insn_imm)
m.d.comb += self.spec_valid.eq(self.rvfi_valid & (~self.insn_padding) & (self.insn_funct3 == 0b000) & (self.insn_opcode == 0b0100011))
m.d.comb += self.spec_rs1_addr.eq(self.insn_rs1)
m.d.comb += self.spec_rs2_addr.eq(self.insn_rs2)
m.d.comb += self.spec_mem_addr.eq(addr)
m.d.comb += self.spec_mem_wmask.eq((1 << 1) - 1)
m.d.comb += self.spec_mem_wdata.eq(self.rvfi_rs2_rdata)
m.d.comb += self.spec_pc_wdata.eq(self.rvfi_pc_rdata + 4)
m.d.comb += self.spec_trap.eq(~self.misa_ok)
return m