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 15ce49c..16a23d0 100644 (file)
--- 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 4a34dce..6fb567a 100644 (file)
--- 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))