Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/test/fixedbugs/issue14553.go b/test/fixedbugs/issue14553.go
new file mode 100644
index 0000000..d7ebb12
--- /dev/null
+++ b/test/fixedbugs/issue14553.go
@@ -0,0 +1,45 @@
+// run
+
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This test checks if the compiler's internal constant
+// arithmetic correctly rounds denormal float32 values.
+
+package main
+
+import (
+	"fmt"
+	"math"
+)
+
+func main() {
+	for _, t := range []struct {
+		value float32
+		bits  uint32
+	}{
+		{0e+00, 0x00000000},
+		{1e-46, 0x00000000},
+		{0.5e-45, 0x00000000},
+		{0.8e-45, 0x00000001},
+		{1e-45, 0x00000001},
+		{2e-45, 0x00000001},
+		{3e-45, 0x00000002},
+		{4e-45, 0x00000003},
+		{5e-45, 0x00000004},
+		{6e-45, 0x00000004},
+		{7e-45, 0x00000005},
+		{8e-45, 0x00000006},
+		{9e-45, 0x00000006},
+		{1.0e-44, 0x00000007},
+		{1.1e-44, 0x00000008},
+		{1.2e-44, 0x00000009},
+	} {
+		got := math.Float32bits(t.value)
+		want := t.bits
+		if got != want {
+			panic(fmt.Sprintf("bits(%g) = 0x%08x; want 0x%08x", t.value, got, want))
+		}
+	}
+}