From 28f3c8143b2f7e6178e5baaf81d15c65cbe6f06b Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Thu, 1 Feb 2018 21:05:20 +0000
Subject: math: adjust compilation flags, use them when testing

    We were using special compilation flags for the math package, but we
    weren't using them when testing.  That meant that our tests were not
    checking the real code we were providing.  Fix that.

    Fixing that revealed that we were not using a good set of flags, or at
    least were not using flags that let the tests pass.  Adjust the flags
    to stop using -funsafe-math-optimizations on x86.  Instead always use
    -ffp-contract=off -fno-math-errno -fno-trapping-math for all targets.

    Fixes golang/go#23647

    Reviewed-on: https://go-review.googlesource.com/91355

From-SVN: r257312
---
 libgo/go/math/all_test.go | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'libgo/go')

diff --git a/libgo/go/math/all_test.go b/libgo/go/math/all_test.go
index 6682395..98437b0 100644
--- a/libgo/go/math/all_test.go
+++ b/libgo/go/math/all_test.go
@@ -128,7 +128,7 @@ var cbrt = []float64{
 var ceil = []float64{
 	5.0000000000000000e+00,
 	8.0000000000000000e+00,
-	0.0000000000000000e+00,
+	Copysign(0, -1),
 	-5.0000000000000000e+00,
 	1.0000000000000000e+01,
 	3.0000000000000000e+00,
@@ -644,7 +644,7 @@ var tanh = []float64{
 var trunc = []float64{
 	4.0000000000000000e+00,
 	7.0000000000000000e+00,
-	-0.0000000000000000e+00,
+	Copysign(0, -1),
 	-5.0000000000000000e+00,
 	9.0000000000000000e+00,
 	2.0000000000000000e+00,
@@ -2134,7 +2134,7 @@ func TestCbrt(t *testing.T) {
 
 func TestCeil(t *testing.T) {
 	for i := 0; i < len(vf); i++ {
-		if f := Ceil(vf[i]); ceil[i] != f {
+		if f := Ceil(vf[i]); !alike(ceil[i], f) {
 			t.Errorf("Ceil(%g) = %g, want %g", vf[i], f, ceil[i])
 		}
 	}
@@ -2361,7 +2361,7 @@ func TestDim(t *testing.T) {
 
 func TestFloor(t *testing.T) {
 	for i := 0; i < len(vf); i++ {
-		if f := Floor(vf[i]); floor[i] != f {
+		if f := Floor(vf[i]); !alike(floor[i], f) {
 			t.Errorf("Floor(%g) = %g, want %g", vf[i], f, floor[i])
 		}
 	}
@@ -2884,7 +2884,7 @@ func TestTanh(t *testing.T) {
 
 func TestTrunc(t *testing.T) {
 	for i := 0; i < len(vf); i++ {
-		if f := Trunc(vf[i]); trunc[i] != f {
+		if f := Trunc(vf[i]); !alike(trunc[i], f) {
 			t.Errorf("Trunc(%g) = %g, want %g", vf[i], f, trunc[i])
 		}
 	}
-- 
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