From 7923dd632ea78fe2b7c80b908a8f2d86e6711454 Mon Sep 17 00:00:00 2001
From: Zihao Yu <yuzihao@ict.ac.cn>
Date: Wed, 25 Sep 2019 19:13:36 +0800
Subject: [PATCH] riscv64,exec: add fence.i

---
 src/isa/riscv64/exec/all-instr.h | 1 +
 src/isa/riscv64/exec/exec.c      | 2 +-
 src/isa/riscv64/exec/special.c   | 2 ++
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/isa/riscv64/exec/all-instr.h b/src/isa/riscv64/exec/all-instr.h
index 1b5e3963..dc5b73d6 100644
--- a/src/isa/riscv64/exec/all-instr.h
+++ b/src/isa/riscv64/exec/all-instr.h
@@ -25,6 +25,7 @@ make_EHelper(bne);
 
 make_EHelper(inv);
 make_EHelper(nemu_trap);
+make_EHelper(fence);
 
 make_EHelper(csrrw);
 make_EHelper(csrrs);
diff --git a/src/isa/riscv64/exec/exec.c b/src/isa/riscv64/exec/exec.c
index 157f34ba..7089eddb 100644
--- a/src/isa/riscv64/exec/exec.c
+++ b/src/isa/riscv64/exec/exec.c
@@ -65,7 +65,7 @@ static make_EHelper(system) {
 }
 
 static OpcodeEntry opcode_table [32] = {
-  /* b00 */ IDEX(ld, load), EMPTY, EMPTY, EMPTY, IDEX(I, op_imm), IDEX(U, auipc), IDEX(I, op_imm32), EMPTY,
+  /* b00 */ IDEX(ld, load), EMPTY, EMPTY, EX(fence), IDEX(I, op_imm), IDEX(U, auipc), IDEX(I, op_imm32), EMPTY,
   /* b01 */ IDEX(st, store), EMPTY, EMPTY, EMPTY, IDEX(R, op), IDEX(U, lui), IDEX(R, op32), EMPTY,
   /* b10 */ EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
   /* b11 */ IDEX(B, branch), IDEX(I, jalr), EX(nemu_trap), IDEX(J, jal), EX(system), EMPTY, EMPTY, EMPTY,
diff --git a/src/isa/riscv64/exec/special.c b/src/isa/riscv64/exec/special.c
index f89cc6e2..6ee53a1f 100644
--- a/src/isa/riscv64/exec/special.c
+++ b/src/isa/riscv64/exec/special.c
@@ -27,3 +27,5 @@ make_EHelper(nemu_trap) {
   print_asm("nemu trap");
   return;
 }
+
+make_EHelper(fence) { }
-- 
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