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63a09d6d3d
This CL fixes a condition for the previous fix CL 704056. Change-Id: I1f1f8c6f72870403cb3dff14755c43385dc0c933 Reviewed-on: https://go-review.googlesource.com/c/go/+/705499 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
// compile
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//go:build amd64 && goexperiment.simd
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// Copyright 2025 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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// Test case for rematerialization ignoring the register constraint
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// during regalloc's shuffle phase.
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package p
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import (
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"simd"
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)
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func PackComplex(b bool) {
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for {
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if b {
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var indices [4]uint32
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simd.Uint32x4{}.ShiftAllRight(20).Store(&indices)
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_ = indices[indices[0]]
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}
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}
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}
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func PackComplex2(x0 uint16, src [][4]float32, b, b2 bool) {
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var out [][4]byte
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if b2 {
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for y := range x0 {
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row := out[:x0]
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for x := range row {
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px := &src[y]
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if b {
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var indices [4]uint32
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fu := simd.LoadFloat32x4(px).AsUint32x4()
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fu.ShiftAllRight(0).Store(nil)
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entry := simd.LoadUint32x4(&[4]uint32{
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toSrgbTable[indices[0]],
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})
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var res [4]uint32
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entry.ShiftAllRight(19).Store(nil)
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row[x] = [4]uint8{
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uint8(res[0]),
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uint8(res[1]),
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uint8(res[2]),
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}
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} else {
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row[x] = [4]uint8{
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float32ToSrgb8(0),
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float32ToSrgb8(1),
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float32ToSrgb8(2),
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}
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}
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}
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out = out[len(out):]
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}
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}
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}
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var toSrgbTable = [4]uint32{}
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func float32ToSrgb8(f float32) uint8 {
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f = min(0, f)
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fu := uint32(f)
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entry := toSrgbTable[fu]
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return uint8(entry * fu)
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}
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