diff options
Diffstat (limited to 'gcc/config/i386/i386.c')
| -rw-r--r-- | gcc/config/i386/i386.c | 55 |
1 files changed, 28 insertions, 27 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 05fa5e10ebf..c69c738caa0 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -436,7 +436,7 @@ struct processor_costs iamcu_cost = { COSTS_N_INSNS (3), /* cost of movsx */ COSTS_N_INSNS (2), /* cost of movzx */ 8, /* "large" insn */ - 6, /* MOVE_RATIO */ + 9, /* MOVE_RATIO */ 6, /* cost for loading QImode using movzbl */ {2, 4, 2}, /* cost of loading integer registers in QImode, HImode and SImode. @@ -25531,7 +25531,7 @@ ix86_expand_strlensi_unroll_1 (rtx out, rtx src, rtx align_rtx) /* Avoid branch in fixing the byte. */ tmpreg = gen_lowpart (QImode, tmpreg); - emit_insn (gen_addqi3_cc (tmpreg, tmpreg, tmpreg)); + emit_insn (gen_addqi3_cconly_overflow (tmpreg, tmpreg)); tmp = gen_rtx_REG (CCmode, FLAGS_REG); cmp = gen_rtx_LTU (VOIDmode, tmp, const0_rtx); emit_insn (ix86_gen_sub3_carry (out, out, GEN_INT (3), tmp, cmp)); @@ -39510,60 +39510,57 @@ rdseed_step: return target; case IX86_BUILTIN_SBB32: - icode = CODE_FOR_subsi3_carry; + icode = CODE_FOR_subborrowsi; mode0 = SImode; - goto addcarryx; + goto handlecarry; case IX86_BUILTIN_SBB64: - icode = CODE_FOR_subdi3_carry; + icode = CODE_FOR_subborrowdi; mode0 = DImode; - goto addcarryx; + goto handlecarry; case IX86_BUILTIN_ADDCARRYX32: - icode = TARGET_ADX ? CODE_FOR_adcxsi3 : CODE_FOR_addsi3_carry; + icode = CODE_FOR_addcarrysi; mode0 = SImode; - goto addcarryx; + goto handlecarry; case IX86_BUILTIN_ADDCARRYX64: - icode = TARGET_ADX ? CODE_FOR_adcxdi3 : CODE_FOR_adddi3_carry; + icode = CODE_FOR_addcarrydi; mode0 = DImode; -addcarryx: + handlecarry: arg0 = CALL_EXPR_ARG (exp, 0); /* unsigned char c_in. */ arg1 = CALL_EXPR_ARG (exp, 1); /* unsigned int src1. */ arg2 = CALL_EXPR_ARG (exp, 2); /* unsigned int src2. */ arg3 = CALL_EXPR_ARG (exp, 3); /* unsigned int *sum_out. */ - op0 = gen_reg_rtx (QImode); - - /* Generate CF from input operand. */ op1 = expand_normal (arg0); op1 = copy_to_mode_reg (QImode, convert_to_mode (QImode, op1, 1)); - emit_insn (gen_addqi3_cc (op0, op1, constm1_rtx)); - /* Gen ADCX instruction to compute X+Y+CF. */ op2 = expand_normal (arg1); - op3 = expand_normal (arg2); - - if (!REG_P (op2)) + if (!register_operand (op2, mode0)) op2 = copy_to_mode_reg (mode0, op2); - if (!REG_P (op3)) - op3 = copy_to_mode_reg (mode0, op3); - - op0 = gen_reg_rtx (mode0); - op4 = gen_rtx_REG (CCCmode, FLAGS_REG); - pat = gen_rtx_LTU (VOIDmode, op4, const0_rtx); - emit_insn (GEN_FCN (icode) (op0, op2, op3, op4, pat)); + op3 = expand_normal (arg2); + if (!register_operand (op3, mode0)) + op3 = copy_to_mode_reg (mode0, op3); - /* Store the result. */ op4 = expand_normal (arg3); if (!address_operand (op4, VOIDmode)) { op4 = convert_memory_address (Pmode, op4); op4 = copy_addr_to_reg (op4); } - emit_move_insn (gen_rtx_MEM (mode0, op4), op0); + + /* Generate CF from input operand. */ + emit_insn (gen_addqi3_cconly_overflow (op1, constm1_rtx)); + + /* Generate instruction that consumes CF. */ + op0 = gen_reg_rtx (mode0); + + op1 = gen_rtx_REG (CCCmode, FLAGS_REG); + pat = gen_rtx_LTU (mode0, op1, const0_rtx); + emit_insn (GEN_FCN (icode) (op0, op2, op3, op1, pat)); /* Return current CF value. */ if (target == 0) @@ -39571,6 +39568,10 @@ addcarryx: PUT_MODE (pat, QImode); emit_insn (gen_rtx_SET (target, pat)); + + /* Store the result. */ + emit_move_insn (gen_rtx_MEM (mode0, op4), op0); + return target; case IX86_BUILTIN_READ_FLAGS: |