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e03220a594
FLDPI pushes the constant pi to 387's register stack, which is more efficient than MOVSSconst/MOVSDconst. 1. This optimization reduces 0.3KB of the total size of pkg/linux_386 (exlcuding cmd/compile). 2. There is little regression in the go1 benchmark. name old time/op new time/op delta BinaryTree17-4 3.30s ± 3% 3.30s ± 2% ~ (p=0.759 n=40+39) Fannkuch11-4 3.53s ± 1% 3.54s ± 1% ~ (p=0.168 n=40+40) FmtFprintfEmpty-4 45.5ns ± 3% 45.6ns ± 3% ~ (p=0.553 n=40+40) FmtFprintfString-4 78.4ns ± 3% 78.3ns ± 3% ~ (p=0.593 n=40+40) FmtFprintfInt-4 88.8ns ± 2% 89.9ns ± 2% ~ (p=0.083 n=40+33) FmtFprintfIntInt-4 140ns ± 4% 140ns ± 4% ~ (p=0.656 n=40+40) FmtFprintfPrefixedInt-4 180ns ± 2% 181ns ± 3% +0.53% (p=0.050 n=40+40) FmtFprintfFloat-4 408ns ± 4% 411ns ± 3% ~ (p=0.112 n=40+40) FmtManyArgs-4 599ns ± 3% 602ns ± 3% ~ (p=0.784 n=40+40) GobDecode-4 7.24ms ± 6% 7.30ms ± 5% ~ (p=0.171 n=40+40) GobEncode-4 6.98ms ± 5% 6.89ms ± 8% ~ (p=0.107 n=40+40) Gzip-4 396ms ± 4% 396ms ± 3% ~ (p=0.852 n=40+40) Gunzip-4 41.3ms ± 3% 41.5ms ± 4% ~ (p=0.221 n=40+40) HTTPClientServer-4 63.4µs ± 3% 63.4µs ± 2% ~ (p=0.895 n=39+40) JSONEncode-4 17.5ms ± 2% 17.5ms ± 3% ~ (p=0.090 n=40+40) JSONDecode-4 60.6ms ± 3% 60.1ms ± 4% ~ (p=0.184 n=40+40) Mandelbrot200-4 7.80ms ± 3% 7.78ms ± 2% ~ (p=0.512 n=40+40) GoParse-4 3.30ms ± 3% 3.28ms ± 2% -0.61% (p=0.034 n=40+40) RegexpMatchEasy0_32-4 104ns ± 4% 103ns ± 4% ~ (p=0.118 n=40+40) RegexpMatchEasy0_1K-4 850ns ± 2% 848ns ± 2% ~ (p=0.370 n=40+40) RegexpMatchEasy1_32-4 112ns ± 4% 112ns ± 4% ~ (p=0.848 n=40+40) RegexpMatchEasy1_1K-4 1.04µs ± 4% 1.03µs ± 4% ~ (p=0.333 n=40+40) RegexpMatchMedium_32-4 132ns ± 4% 131ns ± 3% ~ (p=0.527 n=40+40) RegexpMatchMedium_1K-4 43.4µs ± 3% 43.5µs ± 3% ~ (p=0.111 n=40+40) RegexpMatchHard_32-4 2.24µs ± 4% 2.24µs ± 4% ~ (p=0.441 n=40+40) RegexpMatchHard_1K-4 67.9µs ± 3% 68.0µs ± 3% ~ (p=0.095 n=40+40) Revcomp-4 1.84s ± 2% 1.84s ± 2% ~ (p=0.677 n=40+40) Template-4 68.4ms ± 3% 68.6ms ± 3% ~ (p=0.345 n=40+40) TimeParse-4 433ns ± 3% 433ns ± 3% ~ (p=0.403 n=40+40) TimeFormat-4 407ns ± 3% 406ns ± 3% ~ (p=0.900 n=40+40) [Geo mean] 67.1µs 67.2µs +0.04% name old speed new speed delta GobDecode-4 106MB/s ± 5% 105MB/s ± 5% ~ (p=0.173 n=40+40) GobEncode-4 110MB/s ± 5% 112MB/s ± 9% ~ (p=0.104 n=40+40) Gzip-4 49.0MB/s ± 4% 49.1MB/s ± 4% ~ (p=0.836 n=40+40) Gunzip-4 471MB/s ± 3% 468MB/s ± 4% ~ (p=0.218 n=40+40) JSONEncode-4 111MB/s ± 2% 111MB/s ± 3% ~ (p=0.090 n=40+40) JSONDecode-4 32.0MB/s ± 3% 32.3MB/s ± 4% ~ (p=0.194 n=40+40) GoParse-4 17.6MB/s ± 3% 17.7MB/s ± 2% +0.62% (p=0.035 n=40+40) RegexpMatchEasy0_32-4 307MB/s ± 4% 309MB/s ± 4% +0.70% (p=0.041 n=40+40) RegexpMatchEasy0_1K-4 1.20GB/s ± 3% 1.21GB/s ± 2% ~ (p=0.353 n=40+40) RegexpMatchEasy1_32-4 285MB/s ± 3% 284MB/s ± 4% ~ (p=0.384 n=40+40) RegexpMatchEasy1_1K-4 988MB/s ± 4% 992MB/s ± 3% ~ (p=0.335 n=40+40) RegexpMatchMedium_32-4 7.56MB/s ± 4% 7.57MB/s ± 4% ~ (p=0.314 n=40+40) RegexpMatchMedium_1K-4 23.6MB/s ± 3% 23.6MB/s ± 3% ~ (p=0.107 n=40+40) RegexpMatchHard_32-4 14.3MB/s ± 4% 14.3MB/s ± 4% ~ (p=0.429 n=40+40) RegexpMatchHard_1K-4 15.1MB/s ± 3% 15.1MB/s ± 3% ~ (p=0.099 n=40+40) Revcomp-4 138MB/s ± 2% 138MB/s ± 2% ~ (p=0.658 n=40+40) Template-4 28.4MB/s ± 3% 28.3MB/s ± 3% ~ (p=0.331 n=40+40) [Geo mean] 80.8MB/s 80.8MB/s +0.09% Change-Id: I0cb715eead68ade097a302e7fb80ccbd1d1b511e Reviewed-on: https://go-review.googlesource.com/130975 Run-TryBot: Ben Shi <powerman1st@163.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
107 lines
2.2 KiB
Go
107 lines
2.2 KiB
Go
// asmcheck
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package codegen
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import "math"
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// This file contains codegen tests related to arithmetic
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// simplifications and optimizations on float types.
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// For codegen tests on integer types, see arithmetic.go.
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// --------------------- //
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// Strength-reduce //
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// --------------------- //
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func Mul2(f float64) float64 {
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// 386/sse2:"ADDSD",-"MULSD"
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// 386/387:"FADDDP",-"FMULDP"
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// amd64:"ADDSD",-"MULSD"
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// arm/7:"ADDD",-"MULD"
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// arm64:"FADDD",-"FMULD"
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return f * 2.0
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}
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func DivPow2(f1, f2, f3 float64) (float64, float64, float64) {
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// 386/sse2:"MULSD",-"DIVSD"
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// 386/387:"FMULDP",-"FDIVDP"
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// amd64:"MULSD",-"DIVSD"
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// arm/7:"MULD",-"DIVD"
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// arm64:"FMULD",-"FDIVD"
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x := f1 / 16.0
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// 386/sse2:"MULSD",-"DIVSD"
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// 386/387:"FMULDP",-"FDIVDP"
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// amd64:"MULSD",-"DIVSD"
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// arm/7:"MULD",-"DIVD"
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// arm64:"FMULD",-"FDIVD"
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y := f2 / 0.125
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// 386/sse2:"ADDSD",-"DIVSD",-"MULSD"
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// 386/387:"FADDDP",-"FDIVDP",-"FMULDP"
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// amd64:"ADDSD",-"DIVSD",-"MULSD"
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// arm/7:"ADDD",-"MULD",-"DIVD"
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// arm64:"FADDD",-"FMULD",-"FDIVD"
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z := f3 / 0.5
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return x, y, z
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}
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func getPi() float64 {
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// 386/387:"FLDPI"
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return math.Pi
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}
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// ----------- //
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// Fused //
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// ----------- //
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func FusedAdd32(x, y, z float32) float32 {
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// s390x:"FMADDS\t"
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// ppc64le:"FMADDS\t"
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return x*y + z
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}
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func FusedSub32(x, y, z float32) float32 {
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// s390x:"FMSUBS\t"
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// ppc64le:"FMSUBS\t"
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return x*y - z
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}
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func FusedAdd64(x, y, z float64) float64 {
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// s390x:"FMADD\t"
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// ppc64le:"FMADD\t"
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return x*y + z
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}
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func FusedSub64(x, y, z float64) float64 {
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// s390x:"FMSUB\t"
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// ppc64le:"FMSUB\t"
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return x*y - z
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}
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// ---------------- //
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// Non-floats //
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// ---------------- //
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// We should make sure that the compiler doesn't generate floating point
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// instructions for non-float operations on Plan 9, because floating point
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// operations are not allowed in the note handler.
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func ArrayZero() [16]byte {
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// amd64:"MOVUPS"
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// plan9/amd64/:-"MOVUPS"
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var a [16]byte
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return a
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}
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func ArrayCopy(a [16]byte) (b [16]byte) {
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// amd64:"MOVUPS"
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// plan9/amd64/:-"MOVUPS"
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b = a
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return
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}
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