diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/x86_64/tcg-target.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/tcg/x86_64/tcg-target.c b/tcg/x86_64/tcg-target.c index 9709430c6f..b4ba65f972 100644 --- a/tcg/x86_64/tcg-target.c +++ b/tcg/x86_64/tcg-target.c @@ -397,7 +397,13 @@ static inline void tcg_out_st(TCGContext *s, TCGType type, int arg, static inline void tgen_arithi32(TCGContext *s, int c, int r0, int32_t val) { - if (val == (int8_t)val) { + if ((c == ARITH_ADD && val == 1) || (c == ARITH_SUB && val == -1)) { + /* inc */ + tcg_out_modrm(s, 0xff, 0, r0); + } else if ((c == ARITH_ADD && val == -1) || (c == ARITH_SUB && val == 1)) { + /* dec */ + tcg_out_modrm(s, 0xff, 1, r0); + } else if (val == (int8_t)val) { tcg_out_modrm(s, 0x83, c, r0); tcg_out8(s, val); } else if (c == ARITH_AND && val == 0xffu) { @@ -414,7 +420,13 @@ static inline void tgen_arithi32(TCGContext *s, int c, int r0, int32_t val) static inline void tgen_arithi64(TCGContext *s, int c, int r0, int64_t val) { - if (val == (int8_t)val) { + if ((c == ARITH_ADD && val == 1) || (c == ARITH_SUB && val == -1)) { + /* inc */ + tcg_out_modrm(s, 0xff | P_REXW, 0, r0); + } else if ((c == ARITH_ADD && val == -1) || (c == ARITH_SUB && val == 1)) { + /* dec */ + tcg_out_modrm(s, 0xff | P_REXW, 1, r0); + } else 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) { |