runtime: fix complex division benchmarks
we can't add the division result to n during iteration, because it might
turn n into NaN or Inf.
R=golang-dev, rsc, iant, iant
CC=golang-dev
https://golang.org/cl/6197045
diff --git a/src/pkg/runtime/complex_test.go b/src/pkg/runtime/complex_test.go
index ebe2d59..f41e6a3 100644
--- a/src/pkg/runtime/complex_test.go
+++ b/src/pkg/runtime/complex_test.go
@@ -14,44 +14,54 @@
func BenchmarkComplex128DivNormal(b *testing.B) {
d := 15 + 2i
n := 32 + 3i
+ res := 0i
for i := 0; i < b.N; i++ {
- n += n / d
+ n += 0.1i
+ res += n / d
}
- result = n
+ result = res
}
func BenchmarkComplex128DivNisNaN(b *testing.B) {
d := cmplx.NaN()
n := 32 + 3i
+ res := 0i
for i := 0; i < b.N; i++ {
- n += n / d
+ n += 0.1i
+ res += n / d
}
- result = n
+ result = res
}
func BenchmarkComplex128DivDisNaN(b *testing.B) {
d := 15 + 2i
n := cmplx.NaN()
+ res := 0i
for i := 0; i < b.N; i++ {
- n += n / d
+ d += 0.1i
+ res += n / d
}
- result = n
+ result = res
}
func BenchmarkComplex128DivNisInf(b *testing.B) {
d := 15 + 2i
n := cmplx.Inf()
+ res := 0i
for i := 0; i < b.N; i++ {
- n += n / d
+ d += 0.1i
+ res += n / d
}
- result = n
+ result = res
}
func BenchmarkComplex128DivDisInf(b *testing.B) {
d := cmplx.Inf()
n := 32 + 3i
+ res := 0i
for i := 0; i < b.N; i++ {
- n += n / d
+ n += 0.1i
+ res += n / d
}
- result = n
+ result = res
}
