diff options
Diffstat (limited to 'tcg/i386')
| -rw-r--r-- | tcg/i386/tcg-target.c | 53 |
1 files changed, 27 insertions, 26 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index 4e33b25ef8..1ce42b9d5d 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -156,6 +156,10 @@ static inline int tcg_target_const_match(tcg_target_long val, return 0; } +#define P_EXT 0x100 /* 0x0f opcode prefix */ + +#define OPC_BSWAP (0xc8 | P_EXT) + #define ARITH_ADD 0 #define ARITH_OR 1 #define ARITH_ADC 2 @@ -283,6 +287,18 @@ static inline void tcg_out_st(TCGContext *s, TCGType type, int arg, tcg_out_modrm_offset(s, 0x89, arg, arg1, arg2); } +static inline void tcg_out_bswap32(TCGContext *s, int reg) +{ + tcg_out_opc(s, OPC_BSWAP + reg); +} + +static inline void tcg_out_rolw_8(TCGContext *s, int reg) +{ + tcg_out8(s, 0x66); + tcg_out_modrm(s, 0xc1, 0, reg); + tcg_out8(s, 8); +} + static inline void tgen_arithi(TCGContext *s, int c, int r0, int32_t val, int cf) { if (!cf && ((c == ARITH_ADD && val == 1) || (c == ARITH_SUB && val == -1))) { @@ -695,20 +711,14 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, /* movzwl */ tcg_out_modrm_offset(s, 0xb7 | P_EXT, data_reg, r0, GUEST_BASE); if (bswap) { - /* rolw $8, data_reg */ - tcg_out8(s, 0x66); - tcg_out_modrm(s, 0xc1, 0, data_reg); - tcg_out8(s, 8); + tcg_out_rolw_8(s, data_reg); } break; case 1 | 4: /* movswl */ tcg_out_modrm_offset(s, 0xbf | P_EXT, data_reg, r0, GUEST_BASE); if (bswap) { - /* rolw $8, data_reg */ - tcg_out8(s, 0x66); - tcg_out_modrm(s, 0xc1, 0, data_reg); - tcg_out8(s, 8); + tcg_out_rolw_8(s, data_reg); /* movswl data_reg, data_reg */ tcg_out_modrm(s, 0xbf | P_EXT, data_reg, data_reg); @@ -718,8 +728,7 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, /* movl (r0), data_reg */ tcg_out_modrm_offset(s, 0x8b, data_reg, r0, GUEST_BASE); if (bswap) { - /* bswap */ - tcg_out_opc(s, (0xc8 + data_reg) | P_EXT); + tcg_out_bswap32(s, data_reg); } break; case 3: @@ -736,11 +745,10 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, GUEST_BASE + 4); } else { tcg_out_modrm_offset(s, 0x8b, data_reg, r0, GUEST_BASE + 4); - tcg_out_opc(s, (0xc8 + data_reg) | P_EXT); + tcg_out_bswap32(s, data_reg); tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, GUEST_BASE); - /* bswap */ - tcg_out_opc(s, (0xc8 + data_reg2) | P_EXT); + tcg_out_bswap32(s, data_reg2); } break; default: @@ -924,9 +932,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, case 1: if (bswap) { tcg_out_mov(s, r1, data_reg); - tcg_out8(s, 0x66); /* rolw $8, %ecx */ - tcg_out_modrm(s, 0xc1, 0, r1); - tcg_out8(s, 8); + tcg_out_rolw_8(s, r1); data_reg = r1; } /* movw */ @@ -936,8 +942,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, case 2: if (bswap) { tcg_out_mov(s, r1, data_reg); - /* bswap data_reg */ - tcg_out_opc(s, (0xc8 + r1) | P_EXT); + tcg_out_bswap32(s, r1); data_reg = r1; } /* movl */ @@ -946,12 +951,10 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, case 3: if (bswap) { tcg_out_mov(s, r1, data_reg2); - /* bswap data_reg */ - tcg_out_opc(s, (0xc8 + r1) | P_EXT); + tcg_out_bswap32(s, r1); tcg_out_modrm_offset(s, 0x89, r1, r0, GUEST_BASE); tcg_out_mov(s, r1, data_reg); - /* bswap data_reg */ - tcg_out_opc(s, (0xc8 + r1) | P_EXT); + tcg_out_bswap32(s, r1); tcg_out_modrm_offset(s, 0x89, r1, r0, GUEST_BASE + 4); } else { tcg_out_modrm_offset(s, 0x89, data_reg, r0, GUEST_BASE); @@ -1149,12 +1152,10 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, break; case INDEX_op_bswap16_i32: - tcg_out8(s, 0x66); - tcg_out_modrm(s, 0xc1, SHIFT_ROL, args[0]); - tcg_out8(s, 8); + tcg_out_rolw_8(s, args[0]); break; case INDEX_op_bswap32_i32: - tcg_out_opc(s, (0xc8 + args[0]) | P_EXT); + tcg_out_bswap32(s, args[0]); break; case INDEX_op_neg_i32: |