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-rw-r--r--test/fixedbugs/issue17005.go46
1 files changed, 46 insertions, 0 deletions
diff --git a/test/fixedbugs/issue17005.go b/test/fixedbugs/issue17005.go
new file mode 100644
index 0000000..e539519
--- /dev/null
+++ b/test/fixedbugs/issue17005.go
@@ -0,0 +1,46 @@
+// compile
+
+// 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 tickles (a version of) the PPC64 back end to
+// emit a BVS instruction.
+
+package foo
+
+type Flag int
+
+const (
+ Identity Flag = iota - 2 // H is the identity matrix; no rotation is needed.
+ Rescaling // H specifies rescaling.
+)
+
+type DrotmParams struct {
+ Flag
+}
+
+func Drotmg(d1, d2, x1, y1 float64) (p DrotmParams, rd1, rd2, rx1 float64) {
+
+ const (
+ gam = 4.0
+ gamsq = 16.0
+ rgamsq = 5e-8
+ )
+
+ if d1 < 0 {
+ p.Flag = Rescaling
+ return
+ }
+
+ for rd1 <= rgamsq || rd1 >= gamsq {
+ if rd1 <= rgamsq {
+ rd1 *= gam * gam
+ rx1 /= gam
+ } else {
+ rd1 /= gam * gam
+ rx1 *= gam
+ }
+ }
+ return
+}