From d2ac256bc78dd0360c2f56fc1471c118689216bf Mon Sep 17 00:00:00 2001 From: Kyrylo Tkachov Date: Thu, 30 Apr 2015 13:36:22 +0000 Subject: [PATCH] [AArch64] Properly cost MNEG/[SU]MNEGL patterns * config/aarch64/aarch64.c (aarch64_rtx_mult_cost): Handle MNEG and [SU]MNEGL patterns. From-SVN: r222627 --- gcc/ChangeLog | 5 +++++ gcc/config/aarch64/aarch64.c | 15 ++++++++++++--- 2 files changed, 17 insertions(+), 3 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4eacfc92d1a..8cf8854c09d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2015-04-30 Kyrylo Tkachov + + * config/aarch64/aarch64.c (aarch64_rtx_mult_cost): Handle MNEG + and [SU]MNEGL patterns. + 2015-04-30 Kyrylo Tkachov * config/aarch64/aarch64.c (aarch64_shift_p): New function. diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 3be7b41c568..7d7f8908a05 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -5229,6 +5229,15 @@ aarch64_rtx_mult_cost (rtx x, int code, int outer, bool speed) return cost; } + /* MNEG or [US]MNEGL. Extract the NEG operand and indicate that it's a + compound and let the below cases handle it. After all, MNEG is a + special-case alias of MSUB. */ + if (GET_CODE (op0) == NEG) + { + op0 = XEXP (op0, 0); + compound_p = true; + } + /* Integer multiplies or FMAs have zero/sign extending variants. */ if ((GET_CODE (op0) == ZERO_EXTEND && GET_CODE (op1) == ZERO_EXTEND) @@ -5241,7 +5250,7 @@ aarch64_rtx_mult_cost (rtx x, int code, int outer, bool speed) if (speed) { if (compound_p) - /* MADD/SMADDL/UMADDL. */ + /* SMADDL/UMADDL/UMSUBL/SMSUBL. */ cost += extra_cost->mult[0].extend_add; else /* MUL/SMULL/UMULL. */ @@ -5251,7 +5260,7 @@ aarch64_rtx_mult_cost (rtx x, int code, int outer, bool speed) return cost; } - /* This is either an integer multiply or an FMA. In both cases + /* This is either an integer multiply or a MADD. In both cases we want to recurse and cost the operands. */ cost += rtx_cost (op0, MULT, 0, speed) + rtx_cost (op1, MULT, 1, speed); @@ -5259,7 +5268,7 @@ aarch64_rtx_mult_cost (rtx x, int code, int outer, bool speed) if (speed) { if (compound_p) - /* MADD. */ + /* MADD/MSUB. */ cost += extra_cost->mult[mode == DImode].add; else /* MUL. */ -- 2.30.2