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2959128dc5
mips64 softfloat support is based on mips implementation and introduces
new enviroment variable GOMIPS64.
GOMIPS64 is a GOARCH=mips64{,le} specific option, for a choice between
hard-float and soft-float. Valid values are 'hardfloat' (default) and
'softfloat'. It is passed to the assembler as
'GOMIPS64_{hardfloat,softfloat}'.
Change-Id: I7f73078627f7cb37c588a38fb5c997fe09c56134
Reviewed-on: https://go-review.googlesource.com/108475
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
147 lines
3.8 KiB
Go
147 lines
3.8 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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var sink64 [8]float64
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func approx(x float64) {
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// s390x:"FIDBR\t[$]6"
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// arm64:"FRINTPD"
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// ppc64le:"FRIP"
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sink64[0] = math.Ceil(x)
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// s390x:"FIDBR\t[$]7"
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// arm64:"FRINTMD"
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// ppc64le:"FRIM"
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sink64[1] = math.Floor(x)
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// s390x:"FIDBR\t[$]1"
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// arm64:"FRINTAD"
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// ppc64le:"FRIN"
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sink64[2] = math.Round(x)
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// s390x:"FIDBR\t[$]5"
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// arm64:"FRINTZD"
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// ppc64le:"FRIZ"
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sink64[3] = math.Trunc(x)
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// s390x:"FIDBR\t[$]4"
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sink64[4] = math.RoundToEven(x)
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}
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func sqrt(x float64) float64 {
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// amd64:"SQRTSD"
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// 386/387:"FSQRT" 386/sse2:"SQRTSD"
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// arm64:"FSQRTD"
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// arm/7:"SQRTD"
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// mips/hardfloat:"SQRTD" mips/softfloat:-"SQRTD"
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// mips64/hardfloat:"SQRTD" mips64/softfloat:-"SQRTD"
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return math.Sqrt(x)
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}
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// Check that it's using integer registers
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func abs(x, y float64) {
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// amd64:"BTRQ\t[$]63"
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// s390x:"LPDFR\t",-"MOVD\t" (no integer load/store)
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// ppc64le:"FABS\t"
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sink64[0] = math.Abs(x)
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// amd64:"BTRQ\t[$]63","PXOR" (TODO: this should be BTSQ)
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// s390x:"LNDFR\t",-"MOVD\t" (no integer load/store)
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// ppc64le:"FNABS\t"
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sink64[1] = -math.Abs(y)
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}
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// Check that it's using integer registers
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func abs32(x float32) float32 {
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// s390x:"LPDFR",-"LDEBR",-"LEDBR" (no float64 conversion)
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return float32(math.Abs(float64(x)))
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}
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// Check that it's using integer registers
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func copysign(a, b, c float64) {
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// amd64:"BTRQ\t[$]63","SHRQ\t[$]63","SHLQ\t[$]63","ORQ"
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// s390x:"CPSDR",-"MOVD" (no integer load/store)
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// ppc64le:"FCPSGN"
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sink64[0] = math.Copysign(a, b)
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// amd64:"BTSQ\t[$]63"
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// s390x:"LNDFR\t",-"MOVD\t" (no integer load/store)
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// ppc64le:"FCPSGN"
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sink64[1] = math.Copysign(c, -1)
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// Like math.Copysign(c, -1), but with integer operations. Useful
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// for platforms that have a copysign opcode to see if it's detected.
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// s390x:"LNDFR\t",-"MOVD\t" (no integer load/store)
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sink64[2] = math.Float64frombits(math.Float64bits(a) | 1<<63)
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// amd64:-"SHLQ\t[$]1",-"SHRQ\t[$]1","SHRQ\t[$]63","SHLQ\t[$]63","ORQ"
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// s390x:"CPSDR\t",-"MOVD\t" (no integer load/store)
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// ppc64le:"FCPSGN"
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sink64[3] = math.Copysign(-1, c)
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}
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func fromFloat64(f64 float64) uint64 {
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// amd64:"MOVQ\tX.*, [^X].*"
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return math.Float64bits(f64+1) + 1
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}
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func fromFloat32(f32 float32) uint32 {
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// amd64:"MOVL\tX.*, [^X].*"
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return math.Float32bits(f32+1) + 1
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}
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func toFloat64(u64 uint64) float64 {
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// amd64:"MOVQ\t[^X].*, X.*"
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return math.Float64frombits(u64+1) + 1
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}
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func toFloat32(u32 uint32) float32 {
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// amd64:"MOVL\t[^X].*, X.*"
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return math.Float32frombits(u32+1) + 1
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}
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// Test that comparisons with constants converted to float
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// are evaluated at compile-time
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func constantCheck64() bool {
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// amd64:"MOVB\t[$]0",-"FCMP",-"MOVB\t[$]1"
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// s390x:"MOV(B|BZ|D)\t[$]0,",-"FCMPU",-"MOV(B|BZ|D)\t[$]1,"
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return 0.5 == float64(uint32(1)) || 1.5 > float64(uint64(1<<63)) || math.NaN() == math.NaN()
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}
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func constantCheck32() bool {
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// amd64:"MOVB\t[$]1",-"FCMP",-"MOVB\t[$]0"
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// s390x:"MOV(B|BZ|D)\t[$]1,",-"FCMPU",-"MOV(B|BZ|D)\t[$]0,"
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return float32(0.5) <= float32(int64(1)) && float32(1.5) >= float32(int32(-1<<31)) && float32(math.NaN()) != float32(math.NaN())
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}
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// Test that integer constants are converted to floating point constants
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// at compile-time
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func constantConvert32(x float32) float32 {
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// amd64:"MOVSS\t[$]f32.3f800000\\(SB\\)"
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// s390x:"FMOVS\t[$]f32.3f800000\\(SB\\)"
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// ppc64le:"FMOVS\t[$]f32.3f800000\\(SB\\)"
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if x > math.Float32frombits(0x3f800000) {
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return -x
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}
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return x
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}
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func constantConvertInt32(x uint32) uint32 {
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// amd64:-"MOVSS"
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// s390x:-"FMOVS"
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// ppc64le:-"FMOVS"
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if x > math.Float32bits(1) {
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return -x
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}
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return x
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}
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