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| author | Aurelien Jarno <aurelien@aurel32.net> | 2009-09-27 19:36:05 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2009-09-27 20:00:38 +0200 |
| commit | b70650cbfea324438f55c2269138dd7f4e7cf086 (patch) | |
| tree | ef9d00d4145ef450001c3f418d3ac565b0a34b8b /tcg/i386 | |
| parent | add16157d72454347feb240007da4f90b9d9bae6 (diff) | |
| download | qemu-b70650cbfea324438f55c2269138dd7f4e7cf086.tar.gz | |
tcg/i386: optimize and $0xff(ff), reg
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg/i386')
| -rw-r--r-- | tcg/i386/tcg-target.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index a95fe4c20e..d318443ff1 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -281,6 +281,12 @@ static inline void tgen_arithi(TCGContext *s, int c, int r0, int32_t val) if (val == (int8_t)val) { tcg_out_modrm(s, 0x83, c, r0); tcg_out8(s, val); + } else if (c == ARITH_AND && val == 0xffu && r0 < 4) { + /* movzbl */ + tcg_out_modrm(s, 0xb6 | P_EXT, r0, r0); + } else if (c == ARITH_AND && val == 0xffffu) { + /* movzwl */ + tcg_out_modrm(s, 0xb7 | P_EXT, r0, r0); } else { tcg_out_modrm(s, 0x81, c, r0); tcg_out32(s, val); |