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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2015-08-04 16:22:32 +0000 |
|---|---|---|
| committer | Szabolcs Nagy <nsz@gcc.gnu.org> | 2015-08-04 16:22:32 +0000 |
| commit | d318517df81e3d9afa44dadc8f81aa4a566af392 (patch) | |
| tree | 46be3af317802164fb32ee503cdc9fef41630e42 /gcc | |
| parent | 4b5ed6cf575f29f17bad46f10a7b1c3f4a7bdd08 (diff) | |
| download | gcc-d318517df81e3d9afa44dadc8f81aa4a566af392.zip gcc-d318517df81e3d9afa44dadc8f81aa4a566af392.tar.gz gcc-d318517df81e3d9afa44dadc8f81aa4a566af392.tar.bz2 | |
[AArch64] PR target/66731 Fix fnmul insn with -frounding-math (rtx costs)
2015-08-04 Szabolcs Nagy <szabolcs.nagy@arm.com>
PR target/66731
* config/aarch64/aarch64.c (aarch64_rtx_costs): Fix NEG cost for FNMUL.
(aarch64_rtx_mult_cost): Fix MULT cost with -frounding-math.
From-SVN: r226586
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 22 |
2 files changed, 23 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c6dc552..7a3bf60 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2015-08-04 Szabolcs Nagy <szabolcs.nagy@arm.com> + + PR target/66731 + * config/aarch64/aarch64.c (aarch64_rtx_costs): Fix NEG cost for FNMUL. + (aarch64_rtx_mult_cost): Fix MULT cost with -frounding-math. + 2015-08-04 Richard Biener <rguenther@suse.de> * genmatch.c (dt_node::gen_kids_1): Use gassign and gcall in diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index a91fda8..1394ed7 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -5465,11 +5465,17 @@ aarch64_rtx_mult_cost (rtx x, enum rtx_code code, int outer, bool speed) if (speed) { /* Floating-point FMA/FMUL can also support negations of the - operands. */ - if (GET_CODE (op0) == NEG) - op0 = XEXP (op0, 0); - if (GET_CODE (op1) == NEG) - op1 = XEXP (op1, 0); + operands, unless the rounding mode is upward or downward in + which case FNMUL is different than FMUL with operand negation. */ + bool neg0 = GET_CODE (op0) == NEG; + bool neg1 = GET_CODE (op1) == NEG; + if (compound_p || !flag_rounding_math || (neg0 && neg1)) + { + if (neg0) + op0 = XEXP (op0, 0); + if (neg1) + op1 = XEXP (op1, 0); + } if (compound_p) /* FMADD/FNMADD/FNMSUB/FMSUB. */ @@ -5991,6 +5997,12 @@ aarch64_rtx_costs (rtx x, machine_mode mode, int outer ATTRIBUTE_UNUSED, *cost = rtx_cost (op0, mode, NEG, 0, speed); return true; } + if (GET_CODE (op0) == MULT) + { + /* FNMUL. */ + *cost = rtx_cost (op0, mode, NEG, 0, speed); + return true; + } if (speed) /* FNEG. */ *cost += extra_cost->fp[mode == DFmode].neg; |