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[Patch AArch64] Use software sqrt expansion always for -mlow-precision-recip-sqrt 

gcc/

	* config/aarch64/aarch64.c (use_rsqrt_p): Always use software
	reciprocal sqrt for -mlow-precision-recip-sqrt.

From-SVN: r233462
This commit is contained in:
James Greenhalgh 2016-02-16 16:03:27 +00:00 committed by James Greenhalgh
parent 35a093b60b
commit 1a33079e17
2 changed files with 8 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-02-16 James Greenhalgh <james.greenhalgh@arm.com>
* config/aarch64/aarch64.c (use_rsqrt_p): Always use software
reciprocal sqrt for -mlow-precision-recip-sqrt.
2016-02-16 James Greenhalgh <james.greenhalgh@arm.com>
Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>

5
gcc/config/aarch64/aarch64.c
View File

@ -7468,8 +7468,9 @@ use_rsqrt_p (void)
{
return (!flag_trapping_math
&& flag_unsafe_math_optimizations
&& (aarch64_tune_params.extra_tuning_flags
& AARCH64_EXTRA_TUNE_RECIP_SQRT));
&& ((aarch64_tune_params.extra_tuning_flags
& AARCH64_EXTRA_TUNE_RECIP_SQRT)
|| flag_mrecip_low_precision_sqrt));
}
/* Function to decide when to use