diff options
Diffstat (limited to 'tcg/i386/tcg-target.c')
| -rw-r--r-- | tcg/i386/tcg-target.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index 56800fff6e..abc4cdc7c8 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -1165,6 +1165,25 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, case INDEX_op_st_i32: tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); break; + case INDEX_op_add_i32: + /* For 3-operand addition, use LEA. */ + if (args[0] != args[1]) { + TCGArg a0 = args[0], a1 = args[1], a2 = args[2], c3 = 0; + + if (const_args[2]) { + c3 = a2, a2 = -1; + } else if (a0 == a2) { + /* Watch out for dest = src + dest, since we've removed + the matching constraint on the add. */ + tgen_arithr(s, ARITH_ADD, a0, a1); + break; + } + + tcg_out_modrm_sib_offset(s, OPC_LEA, a0, a1, a2, 0, c3); + break; + } + c = ARITH_ADD; + goto gen_arith; case INDEX_op_sub_i32: c = ARITH_SUB; goto gen_arith; @@ -1177,8 +1196,6 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, case INDEX_op_xor_i32: c = ARITH_XOR; goto gen_arith; - case INDEX_op_add_i32: - c = ARITH_ADD; gen_arith: if (const_args[2]) { tgen_arithi(s, c, args[0], args[2], 0); @@ -1353,7 +1370,7 @@ static const TCGTargetOpDef x86_op_defs[] = { { INDEX_op_st16_i32, { "r", "r" } }, { INDEX_op_st_i32, { "r", "r" } }, - { INDEX_op_add_i32, { "r", "0", "ri" } }, + { INDEX_op_add_i32, { "r", "r", "ri" } }, { INDEX_op_sub_i32, { "r", "0", "ri" } }, { INDEX_op_mul_i32, { "r", "0", "ri" } }, { INDEX_op_mulu2_i32, { "a", "d", "a", "r" } }, |