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authorRichard Henderson <rth@twiddle.net>2017-07-27 20:45:38 -0700
committerRichard Henderson <rth@twiddle.net>2017-09-07 11:57:35 -0700
commit2a8ab93c6bd459ff3cf3fe8978cf733a7dbd3080 (patch)
tree3072c04a19feb131ba26a09de295b23b15ec4eab /tcg
parent150706163748ec45458b6fc902581572cfdc111c (diff)
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tcg/arm: Extract INSN_NOP
We'll want this for tcg_out_nop_fill. Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
-rw-r--r--tcg/arm/tcg-target.inc.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/tcg/arm/tcg-target.inc.c b/tcg/arm/tcg-target.inc.c
index f40e870..78603a1 100644
--- a/tcg/arm/tcg-target.inc.c
+++ b/tcg/arm/tcg-target.inc.c
@@ -160,8 +160,18 @@ typedef enum {
INSN_DMB_ISH = 0x5bf07ff5,
INSN_DMB_MCR = 0xba0f07ee,
+
+ /* Architected nop introduced in v6k. */
+ /* ??? This is an MSR (imm) 0,0,0 insn. Anyone know if this
+ also Just So Happened to do nothing on pre-v6k so that we
+ don't need to conditionalize it? */
+ INSN_NOP_v6k = 0xe320f000,
+ /* Otherwise the assembler uses mov r0,r0 */
+ INSN_NOP_v4 = (COND_AL << 28) | ARITH_MOV,
} ARMInsn;
+#define INSN_NOP (use_armv7_instructions ? INSN_NOP_v6k : INSN_NOP_v4)
+
static const uint8_t tcg_cond_to_arm_cond[] = {
[TCG_COND_EQ] = COND_EQ,
[TCG_COND_NE] = COND_NE,
@@ -375,16 +385,7 @@ static inline void tcg_out_dat_reg(TCGContext *s,
static inline void tcg_out_nop(TCGContext *s)
{
- if (use_armv7_instructions) {
- /* Architected nop introduced in v6k. */
- /* ??? This is an MSR (imm) 0,0,0 insn. Anyone know if this
- also Just So Happened to do nothing on pre-v6k so that we
- don't need to conditionalize it? */
- tcg_out32(s, 0xe320f000);
- } else {
- /* Prior to that the assembler uses mov r0, r0. */
- tcg_out_dat_reg(s, COND_AL, ARITH_MOV, 0, 0, 0, SHIFT_IMM_LSL(0));
- }
+ tcg_out32(s, INSN_NOP);
}
static inline void tcg_out_mov_reg(TCGContext *s, int cond, int rd, int rm)