diff options
| author | Richard Henderson | 2015-10-03 00:41:01 +0200 |
|---|---|---|
| committer | Richard Henderson | 2015-10-19 23:04:38 +0200 |
| commit | 1e1df962e325e18a5188c4814cd1a10215a48f79 (patch) | |
| tree | 1edd75d93286eb5abd5b195b94c4f2079bc2feb1 /tcg/ppc | |
| parent | tcg/ppc: Revise goto_tb implementation (diff) | |
| download | qemu-1e1df962e325e18a5188c4814cd1a10215a48f79.tar.gz qemu-1e1df962e325e18a5188c4814cd1a10215a48f79.tar.xz qemu-1e1df962e325e18a5188c4814cd1a10215a48f79.zip | |
tcg/ppc: Prefer mask over andi.
Prefer the instruction that isn't required to modify cr0.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/ppc')
| -rw-r--r-- | tcg/ppc/tcg-target.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c index cee13e0c21..2c72565fb9 100644 --- a/tcg/ppc/tcg-target.c +++ b/tcg/ppc/tcg-target.c @@ -700,14 +700,14 @@ static void tcg_out_andi32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c) { int mb, me; - if ((c & 0xffff) == c) { + if (mask_operand(c, &mb, &me)) { + tcg_out_rlw(s, RLWINM, dst, src, 0, mb, me); + } else if ((c & 0xffff) == c) { tcg_out32(s, ANDI | SAI(src, dst, c)); return; } else if ((c & 0xffff0000) == c) { tcg_out32(s, ANDIS | SAI(src, dst, c >> 16)); return; - } else if (mask_operand(c, &mb, &me)) { - tcg_out_rlw(s, RLWINM, dst, src, 0, mb, me); } else { tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R0, c); tcg_out32(s, AND | SAB(src, dst, TCG_REG_R0)); @@ -719,18 +719,18 @@ static void tcg_out_andi64(TCGContext *s, TCGReg dst, TCGReg src, uint64_t c) int mb, me; assert(TCG_TARGET_REG_BITS == 64); - if ((c & 0xffff) == c) { - tcg_out32(s, ANDI | SAI(src, dst, c)); - return; - } else if ((c & 0xffff0000) == c) { - tcg_out32(s, ANDIS | SAI(src, dst, c >> 16)); - return; - } else if (mask64_operand(c, &mb, &me)) { + if (mask64_operand(c, &mb, &me)) { if (mb == 0) { tcg_out_rld(s, RLDICR, dst, src, 0, me); } else { tcg_out_rld(s, RLDICL, dst, src, 0, mb); } + } else if ((c & 0xffff) == c) { + tcg_out32(s, ANDI | SAI(src, dst, c)); + return; + } else if ((c & 0xffff0000) == c) { + tcg_out32(s, ANDIS | SAI(src, dst, c >> 16)); + return; } else { tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_R0, c); tcg_out32(s, AND | SAB(src, dst, TCG_REG_R0)); |