Add SRLI instruction

2020-08-10 12:35:49 +08:00 · 2020-08-10 12:35:49 +08:00 · 9740470c47
parent 031f335325
commit 9740470c47
1 changed files with 15 additions and 0 deletions
--- a/insns/InsnSrli.py
+++ b/insns/InsnSrli.py
@ -0,0 +1,15 @@
+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