Add RV32I I-Type Instruction (Arithmetic Variation)

insns/InsnRV32IITypeArith.py

@@ -0,0 +1,25 @@
+from InsnRV32IIType import *
+
+"""
+RV32I I-Type Instruction (Arithmetic Variation)
+"""
+
+class InsnRV32IITypeArith(InsnRV32IIType):
+    def __init__(self, RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA, RISCV_FORMAL_COMPRESSED, funct3):
+        super().__init__(RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA, RISCV_FORMAL_COMPRESSED)
+        self.funct3 = funct3
+    def elaborate(self, platform):
+        m = super().elaborate(platform)
+
+        if self.RISCV_FORMAL_CSR_MISA:
+            m.d.comb += self.misa_ok.eq((self.rvfi_csr_misa_rdata & 0) == 0)
+            m.d.comb += self.spec_csr_misa_rmask.eq(0)
+        else:
+            m.d.comb += self.misa_ok.eq(1)
+
+        m.d.comb += self.spec_valid.eq(self.rvfi_valid & (~self.insn_padding) & (self.insn_funct3 == self.funct3) & (self.insn_opcode == 0b0010011))
+        m.d.comb += self.spec_rs1_addr.eq(self.insn_rs1)
+        m.d.comb += self.spec_rd_addr.eq(self.insn_rd)
+        m.d.comb += self.spec_pc_wdata.eq(self.rvfi_pc_rdata + 4)
+
+        return m