tcg/riscv: Introduce OPC_NOP

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/tcg/riscv/tcg-target.c.inc b/tcg/riscv/tcg-target.c.inc
index 136fe54d4b9bedab2ae0782f8d61f527a17ebdfc..82ca86431e06ba0581aa9c5a641529ac9be655ea 100644 (file)
--- a/tcg/riscv/tcg-target.c.inc
+++ b/tcg/riscv/tcg-target.c.inc
@@ -267,6 +267,7 @@ typedef enum {
 #endif
 
     OPC_FENCE = 0x0000000f,
+    OPC_NOP   = OPC_ADDI,   /* nop = addi r0,r0,0 */
 } RISCVInsn;
 
 /*
@@ -403,7 +404,7 @@ static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
 {
     int i;
     for (i = 0; i < count; ++i) {
-        p[i] = encode_i(OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 0);
+        p[i] = OPC_NOP;
     }
 }