1 files changed, 53 insertions, 0 deletions
diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go
new file mode 100644
index 0000000000..02552e1fdb
--- /dev/null
+++ b/test/codegen/mathbits.go
@@ -0,0 +1,53 @@
+// asmcheck
+
+// Copyright 2018 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.
+
+package codegen
+
+import "math/bits"
+
+// --------------- //
+//    bits.Len*    //
+// --------------- //
+
+func Len(n uint) int {
+	//amd64:"BSRQ"
+	//s390x:"FLOGR"
+	//arm:"CLZ" arm64:"CLZ"
+	//mips:"CLZ"
+	return bits.Len(n)
+}
+
+func Len64(n uint64) int {
+	//amd64:"BSRQ"
+	//s390x:"FLOGR"
+	//arm:"CLZ" arm64:"CLZ"
+	//mips:"CLZ"
+	return bits.Len64(n)
+}
+
+func Len32(n uint32) int {
+	//amd64:"BSRQ"
+	//s390x:"FLOGR"
+	//arm:"CLZ" arm64:"CLZ"
+	//mips:"CLZ"
+	return bits.Len32(n)
+}
+
+func Len16(n uint16) int {
+	//amd64:"BSRQ"
+	//s390x:"FLOGR"
+	//arm:"CLZ" arm64:"CLZ"
+	//mips:"CLZ"
+	return bits.Len16(n)
+}
+
+func Len8(n uint8) int {
+	//amd64 Len8 not intrisified
+	//s390x:"FLOGR"
+	//arm:"CLZ" arm64:"CLZ"
+	//mips:"CLZ"
+	return bits.Len8(n)
+}