Include it in the opcode as an extension, as with P_EXT or the REX bits in the x86-64 port.
Signed-off-by: Richard Henderson <r...@twiddle.net> --- tcg/i386/tcg-target.c | 21 +++++++++++++-------- 1 files changed, 13 insertions(+), 8 deletions(-) diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index 646a7b6..2f096fa 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -161,7 +161,8 @@ static inline int tcg_target_const_match(tcg_target_long val, return 0; } -#define P_EXT 0x100 /* 0x0f opcode prefix */ +#define P_EXT 0x100 /* 0x0f opcode prefix */ +#define P_DATA16 0x200 /* 0x66 opcode prefix */ #define OPC_ARITH_EvIz (0x81) #define OPC_ARITH_EvIb (0x83) @@ -267,8 +268,12 @@ static const uint8_t tcg_cond_to_jcc[10] = { static inline void tcg_out_opc(TCGContext *s, int opc) { - if (opc & P_EXT) + if (opc & P_DATA16) { + tcg_out8(s, 0x66); + } + if (opc & P_EXT) { tcg_out8(s, 0x0f); + } tcg_out8(s, opc); } @@ -460,8 +465,8 @@ static inline void tcg_out_bswap32(TCGContext *s, int reg) static inline void tcg_out_rolw_8(TCGContext *s, int reg) { - tcg_out8(s, 0x66); - tcg_out_shifti(s, SHIFT_ROL, reg, 8); + tcg_out_modrm(s, OPC_SHIFT_Ib | P_DATA16, SHIFT_ROL, reg); + tcg_out8(s, 8); } static inline void tgen_arithi(TCGContext *s, int c, int r0, @@ -1074,8 +1079,8 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, data_reg = r1; } /* movw */ - tcg_out8(s, 0x66); - tcg_out_modrm_offset(s, OPC_MOVL_EvGv, data_reg, r0, GUEST_BASE); + tcg_out_modrm_offset(s, OPC_MOVL_EvGv | P_DATA16, + data_reg, r0, GUEST_BASE); break; case 2: if (bswap) { @@ -1180,8 +1185,8 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, break; case INDEX_op_st16_i32: /* movw */ - tcg_out8(s, 0x66); - tcg_out_modrm_offset(s, OPC_MOVL_EvGv, args[0], args[1], args[2]); + tcg_out_modrm_offset(s, OPC_MOVL_EvGv | P_DATA16, + args[0], args[1], args[2]); break; case INDEX_op_st_i32: tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); -- 1.6.6.1