complex divide: match C99 implementation

R=iant, ken2, r, r2, ken3
CC=golang-dev
https://golang.org/cl/1686044

1 files changed, 43 insertions, 0 deletions

diff --git a/test/cmplxdivide.go b/test/cmplxdivide.go
new file mode 100644
index 0000000000..ac4730d647
--- /dev/null
+++ b/test/cmplxdivide.go
@@ -0,0 +1,43 @@
+// $G $D/$F.go $D/cmplxdivide1.go && $L $D/$F.$A && ./$A.out
+
+// Copyright 2010 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.
+
+// Driver for complex division table defined in cmplxdivide1.go
+
+package main
+
+import (
+	"cmath"
+	"fmt"
+	"math"
+)
+
+type Test struct{
+	f, g	complex128
+	out	complex128
+}
+
+var nan = math.NaN()
+var inf = math.Inf(1)
+var negzero = math.Copysign(0, -1)
+
+func calike(a, b complex128) bool {
+	switch {
+	case cmath.IsInf(a) && cmath.IsInf(b):
+		return true
+	case cmath.IsNaN(a) && cmath.IsNaN(b):
+		return true
+	}
+	return a == b
+}
+
+func main() {
+	for _, t := range tests {
+		x := t.f/t.g
+		if !calike(x, t.out) {
+			fmt.Printf("%v/%v: expected %v error; got %v\n", t.f, t.g, t.out, x)
+		}
+	}
+}