test/codegen: port 2^n muls tests to codegen harness

And delete them from the asm_test.go file.

Change-Id: I124c8c352299646ec7db0968cdb0fe59a3b5d83d
Reviewed-on: https://go-review.googlesource.com/99475
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go
new file mode 100644
index 0000000000..c09fad60c8
--- /dev/null
+++ b/test/codegen/arithmetic.go
@@ -0,0 +1,26 @@
+// 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
+
+// This file contains codegen tests related to arithmetic
+// simplifications/optimizations.
+
+func Pow2Muls(n1, n2 int) (int, int) {
+	// amd64:"SHLQ\t[$]5",-"IMULQ"
+	// 386:"SHLL\t[$]5",-"IMULL"
+	// arm:"SLL\t[$]5",-"MUL"
+	// arm64:"LSL\t[$]5",-"MUL"
+	a := n1 * 32
+
+	// amd64:"SHLQ\t[$]6",-"IMULQ"
+	// 386:"SHLL\t[$]6",-"IMULL"
+	// arm:"SLL\t[$]6",-"MUL"
+	// arm64:"LSL\t[$]6",-"MUL"
+	b := -64 * n2
+
+	return a, b
+}