From: Richard Sandiford <richard.sandiford@arm.com>
Date: Thu, 20 Feb 2020 14:16:12 +0000 (+0000)
Subject: aarch64: Fix inverted approx_sqrt condition
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=902d28bd838c4d3f9d28832d387812da2232e1ec;p=gcc.git

aarch64: Fix inverted approx_sqrt condition

The fix for PR80530 included an accidental flipping of the
flag_finite_math_only check, so that -ffinite-math-only (and thus
-ffast-math) disabled approximate sqrt rather than enabling it.

This is tested by later patches but seemed worth splitting out.

2020-02-21  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64.c (aarch64_emit_approx_sqrt): Fix inverted
	flag_finite_math_only condition.
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 15ce49c8c87..16a23d00944 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2020-02-21  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* config/aarch64/aarch64.c (aarch64_emit_approx_sqrt): Fix inverted
+	flag_finite_math_only condition.
+
 2020-02-20  Uroš Bizjak  <ubizjak@gmail.com>
 
 	PR target/93828
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 4a34dce5d79..6fb567ae4bf 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -12761,7 +12761,7 @@ aarch64_emit_approx_sqrt (rtx dst, rtx src, bool recp)
 		& AARCH64_APPROX_MODE (mode))))
 	return false;
 
-      if (flag_finite_math_only
+      if (!flag_finite_math_only
 	  || flag_trapping_math
 	  || !flag_unsafe_math_optimizations
 	  || optimize_function_for_size_p (cfun))