From c007ce824d9a4fccb148f9204e04c23ed2984b71 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Mon, 8 Sep 2014 00:08:51 -0400 Subject: build: move package sources from src/pkg to src Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg. --- src/runtime/vlop_arm_test.go | 70 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 src/runtime/vlop_arm_test.go (limited to 'src/runtime/vlop_arm_test.go') diff --git a/src/runtime/vlop_arm_test.go b/src/runtime/vlop_arm_test.go new file mode 100644 index 0000000000..cd28419adf --- /dev/null +++ b/src/runtime/vlop_arm_test.go @@ -0,0 +1,70 @@ +// Copyright 2012 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 runtime_test + +import "testing" + +// arm soft division benchmarks adapted from +// http://ridiculousfish.com/files/division_benchmarks.tar.gz + +const numeratorsSize = 1 << 21 + +var numerators = randomNumerators() + +type randstate struct { + hi, lo uint32 +} + +func (r *randstate) rand() uint32 { + r.hi = r.hi<<16 + r.hi>>16 + r.hi += r.lo + r.lo += r.hi + return r.hi +} + +func randomNumerators() []uint32 { + numerators := make([]uint32, numeratorsSize) + random := &randstate{2147483563, 2147483563 ^ 0x49616E42} + for i := range numerators { + numerators[i] = random.rand() + } + return numerators +} + +func bmUint32Div(divisor uint32, b *testing.B) { + var sum uint32 + for i := 0; i < b.N; i++ { + sum += numerators[i&(numeratorsSize-1)] / divisor + } +} + +func BenchmarkUint32Div7(b *testing.B) { bmUint32Div(7, b) } +func BenchmarkUint32Div37(b *testing.B) { bmUint32Div(37, b) } +func BenchmarkUint32Div123(b *testing.B) { bmUint32Div(123, b) } +func BenchmarkUint32Div763(b *testing.B) { bmUint32Div(763, b) } +func BenchmarkUint32Div1247(b *testing.B) { bmUint32Div(1247, b) } +func BenchmarkUint32Div9305(b *testing.B) { bmUint32Div(9305, b) } +func BenchmarkUint32Div13307(b *testing.B) { bmUint32Div(13307, b) } +func BenchmarkUint32Div52513(b *testing.B) { bmUint32Div(52513, b) } +func BenchmarkUint32Div60978747(b *testing.B) { bmUint32Div(60978747, b) } +func BenchmarkUint32Div106956295(b *testing.B) { bmUint32Div(106956295, b) } + +func bmUint32Mod(divisor uint32, b *testing.B) { + var sum uint32 + for i := 0; i < b.N; i++ { + sum += numerators[i&(numeratorsSize-1)] % divisor + } +} + +func BenchmarkUint32Mod7(b *testing.B) { bmUint32Mod(7, b) } +func BenchmarkUint32Mod37(b *testing.B) { bmUint32Mod(37, b) } +func BenchmarkUint32Mod123(b *testing.B) { bmUint32Mod(123, b) } +func BenchmarkUint32Mod763(b *testing.B) { bmUint32Mod(763, b) } +func BenchmarkUint32Mod1247(b *testing.B) { bmUint32Mod(1247, b) } +func BenchmarkUint32Mod9305(b *testing.B) { bmUint32Mod(9305, b) } +func BenchmarkUint32Mod13307(b *testing.B) { bmUint32Mod(13307, b) } +func BenchmarkUint32Mod52513(b *testing.B) { bmUint32Mod(52513, b) } +func BenchmarkUint32Mod60978747(b *testing.B) { bmUint32Mod(60978747, b) } +func BenchmarkUint32Mod106956295(b *testing.B) { bmUint32Mod(106956295, b) } -- cgit v1.2.1