diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/x86_64/tcg-target.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tcg/x86_64/tcg-target.c b/tcg/x86_64/tcg-target.c index 38e164ec46..304a0c346b 100644 --- a/tcg/x86_64/tcg-target.c +++ b/tcg/x86_64/tcg-target.c @@ -382,6 +382,12 @@ static inline void tgen_arithi32(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) { + /* movzbl */ + tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB, 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); @@ -393,6 +399,15 @@ static inline void tgen_arithi64(TCGContext *s, int c, int r0, int64_t val) if (val == (int8_t)val) { tcg_out_modrm(s, 0x83 | P_REXW, c, r0); tcg_out8(s, val); + } else if (c == ARITH_AND && val == 0xffu) { + /* movzbl */ + tcg_out_modrm(s, 0xb6 | P_EXT | P_REXW, r0, r0); + } else if (c == ARITH_AND && val == 0xffffu) { + /* movzwl */ + tcg_out_modrm(s, 0xb7 | P_EXT | P_REXW, r0, r0); + } else if (c == ARITH_AND && val == 0xffffffffu) { + /* 32-bit mov zero extends */ + tcg_out_modrm(s, 0x8b, r0, r0); } else if (val == (int32_t)val) { tcg_out_modrm(s, 0x81 | P_REXW, c, r0); tcg_out32(s, val); |