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// 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 and optimizations on float types.
// For codegen tests on integer types, see arithmetic.go.
// --------------------- //
// Strength-reduce //
// --------------------- //
func Mul2(f float64) float64 {
// 386/sse2:"ADDSD",-"MULSD"
// 386/387:"FADDDP",-"FMULDP"
// amd64:"ADDSD",-"MULSD"
// arm/7:"ADDD",-"MULD"
// arm64:"FADDD",-"FMULD"
return f * 2.0
}
func DivPow2(f1, f2, f3 float64) (float64, float64, float64) {
// 386/sse2:"MULSD",-"DIVSD"
// 386/387:"FMULDP",-"FDIVDP"
// amd64:"MULSD",-"DIVSD"
// arm/7:"MULD",-"DIVD"
// arm64:"FMULD",-"FDIVD"
x := f1 / 16.0
// 386/sse2:"MULSD",-"DIVSD"
// 386/387:"FMULDP",-"FDIVDP"
// amd64:"MULSD",-"DIVSD"
// arm/7:"MULD",-"DIVD"
// arm64:"FMULD",-"FDIVD"
y := f2 / 0.125
// 386/sse2:"ADDSD",-"DIVSD",-"MULSD"
// 386/387:"FADDDP",-"FDIVDP",-"FMULDP"
// amd64:"ADDSD",-"DIVSD",-"MULSD"
// arm/7:"ADDD",-"MULD",-"DIVD"
// arm64:"FADDD",-"FMULD",-"FDIVD"
z := f3 / 0.5
return x, y, z
}
// ----------- //
// Fused //
// ----------- //
func FusedAdd32(x, y, z float32) float32 {
// s390x:"FMADDS\t"
// ppc64le:"FMADDS\t"
return x*y + z
}
func FusedSub32(x, y, z float32) float32 {
// s390x:"FMSUBS\t"
// ppc64le:"FMSUBS\t"
return x*y - z
}
func FusedAdd64(x, y, z float64) float64 {
// s390x:"FMADD\t"
// ppc64le:"FMADD\t"
return x*y + z
}
func FusedSub64(x, y, z float64) float64 {
// s390x:"FMSUB\t"
// ppc64le:"FMSUB\t"
return x*y - z
}
// ---------------- //
// Non-floats //
// ---------------- //
// We should make sure that the compiler doesn't generate floating point
// instructions for non-float operations on Plan 9, because floating point
// operations are not allowed in the note handler.
func ArrayZero() [16]byte {
// amd64:"MOVUPS"
// plan9/amd64/:-"MOVUPS"
var a [16]byte
return a
}
func ArrayCopy(a [16]byte) (b [16]byte) {
// amd64:"MOVUPS"
// plan9/amd64/:-"MOVUPS"
b = a
return
}
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