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| author | Richard Henderson <rth@twiddle.net> | 2017-07-27 20:45:38 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2017-09-07 11:57:35 -0700 |
| commit | 2a8ab93c6bd459ff3cf3fe8978cf733a7dbd3080 (patch) | |
| tree | 3072c04a19feb131ba26a09de295b23b15ec4eab | |
| parent | 150706163748ec45458b6fc902581572cfdc111c (diff) | |
| download | qemu-2a8ab93c6bd459ff3cf3fe8978cf733a7dbd3080.zip qemu-2a8ab93c6bd459ff3cf3fe8978cf733a7dbd3080.tar.gz qemu-2a8ab93c6bd459ff3cf3fe8978cf733a7dbd3080.tar.bz2 | |
tcg/arm: Extract INSN_NOP
We'll want this for tcg_out_nop_fill.
Signed-off-by: Richard Henderson <rth@twiddle.net>
| -rw-r--r-- | tcg/arm/tcg-target.inc.c | 21 |
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) |