From: James Greenhalgh <james.greenhalgh@arm.com>
Date: Tue, 16 Feb 2016 16:03:27 +0000 (+0000)
Subject: [Patch AArch64] Use software sqrt expansion always for -mlow-precision-recip-sqrt
X-Git-Tag: basepoints/gcc-7~916
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a33079e170834f17a8c923037bb07c4d1fe8660;p=thirdparty%2Fgcc.git

[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
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 08b3f0d43ee3..52494880bda6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -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>
 
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 974a789721b5..f1e8d42b5889 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -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