From 680042b9ee38e36bc322d64e762e8d6f7de027f7 Mon Sep 17 00:00:00 2001
From: Donald Sebastian Leung
Date: Mon, 3 Aug 2020 10:33:45 +0800
Subject: [PATCH] ADD BNE instruction
---
insns/insn_bne.py | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
create mode 100644 insns/insn_bne.py
diff --git a/insns/insn_bne.py b/insns/insn_bne.py
new file mode 100644
index 0000000..6c273f0
--- /dev/null
+++ b/insns/insn_bne.py
@@ -0,0 +1,22 @@
+from insn_SB import *
+
+class rvfi_insn_bne(rvfi_insn_SB):
+ def __init__(self):
+ super(rvfi_insn_bne, self).__init__()
+ def ports(self):
+ return super(rvfi_insn_bne, self).ports()
+ def elaborate(self, platform):
+ m = super(rvfi_insn_bne, self).elaborate(platform)
+
+ # BNE instruction
+ cond = Signal(1)
+ m.d.comb += cond.eq(self.rvfi_rs1_rdata != self.rvfi_rs2_rdata)
+ next_pc = Signal(32)
+ m.d.comb += next_pc.eq(Mux(cond, self.rvfi_pc_rdata + self.insn_imm, self.rvfi_pc_rdata + 4))
+ m.d.comb += self.spec_valid.eq(self.rvfi_valid & (~self.insn_padding) & (self.insn_funct3 == 0b001) & (self.insn_opcode == 0b1100011))
+ 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_pc_wdata.eq(next_pc)
+ m.d.comb += self.spec_trap.eq(Mux(self.ialign16, next_pc[0] != 0, next_pc[:2] != 0) | ~self.misa_ok)
+
+ return m