go source for verification 2026-05-22

test/simd/bug1.go

@@ -0,0 +1,81 @@
+// compile
+
+//go:build amd64 && goexperiment.simd
+
+// Copyright 2025 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.
+
+// Test case for ICE on picking the wrong type for the spill slot.
+
+package p
+
+import (
+	"simd/archsimd"
+	"unsafe"
+)
+
+func F(
+	dst *[2][4][4]float32,
+	tos *[2][4][4]float32,
+	blend int,
+) {
+	tiny := archsimd.BroadcastFloat32x8(0)
+	for {
+		dstCol12 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[0][0:]))))
+		dstCol34 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[0][2:]))))
+		dstCol56 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[1][0:]))))
+		dstCol78 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[1][2:]))))
+
+		tosCol12 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(tos[0][0:]))))
+		tosCol34 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(tos[0][2:]))))
+		tosCol56 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(tos[1][0:]))))
+		tosCol78 := archsimd.LoadFloat32x8((*[8]float32)(unsafe.Pointer((*[2][4]float32)(tos[1][2:]))))
+
+		var Cr0, Cr1, Cr2 archsimd.Float32x8
+		if blend != 0 {
+			invas := tosCol78.Max(tiny)
+			invad := dstCol78.Max(tiny)
+			Cd0 := dstCol12.Mul(invad)
+			Cd1 := dstCol34.Mul(invad)
+			Cd2 := dstCol56.Mul(invad)
+			Cs0 := tosCol12.Mul(invas)
+			Cs1 := tosCol34.Mul(invas)
+			Cs2 := tosCol56.Mul(invas)
+			var Cm0, Cm1, Cm2 archsimd.Float32x8
+			switch blend {
+			case 4:
+			case 10:
+			case 11:
+			case 8:
+			case 5:
+			case 1:
+			case 0:
+				Cm1 = Cs1
+			case 2:
+				Cm0 = Cd0.Add(Cs0)
+				Cm1 = Cd1.Add(Cs1)
+				Cm2 = Cd2.Add(Cs2)
+			}
+			Cr0 = dstCol78.Mul(Cs0).Mul(Cm0)
+			Cr1 = dstCol78.Mul(Cs1).Mul(Cm1)
+			Cr2 = dstCol78.Mul(Cs2).Mul(Cm2)
+		}
+		var resR, resG, resB, resA archsimd.Float32x8
+		if blend == 0 {
+			resR = tosCol12
+			resG = tosCol34
+			resB = tosCol56
+			resA = tosCol78
+		} else {
+			resR = Cr0.Add(dstCol12)
+			resG = Cr1.Add(dstCol34)
+			resB = Cr2.Add(dstCol56)
+		}
+
+		resR.Store((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[0][0:2]))))
+		resG.Store((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[0][2:4]))))
+		resB.Store((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[1][0:2]))))
+		resA.Store((*[8]float32)(unsafe.Pointer((*[2][4]float32)(dst[1][2:4]))))
+	}
+}

test/simd/bug2.go

@@ -0,0 +1,69 @@
+// compile
+
+//go:build amd64 && goexperiment.simd
+
+// Copyright 2025 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.
+
+// Test case for rematerialization ignoring the register constraint
+// during regalloc's shuffle phase.
+
+package p
+
+import (
+	"simd/archsimd"
+)
+
+func PackComplex(b bool) {
+	for {
+		if b {
+			var indices [4]uint32
+			archsimd.Uint32x4{}.ShiftAllRight(20).Store(&indices)
+			_ = indices[indices[0]]
+		}
+	}
+}
+
+func PackComplex2(x0 uint16, src [][4]float32, b, b2 bool) {
+	var out [][4]byte
+	if b2 {
+		for y := range x0 {
+			row := out[:x0]
+			for x := range row {
+				px := &src[y]
+				if b {
+					var indices [4]uint32
+					fu := archsimd.LoadFloat32x4(px).AsUint32x4()
+					fu.ShiftAllRight(0).Store(nil)
+					entry := archsimd.LoadUint32x4(&[4]uint32{
+						toSrgbTable[indices[0]],
+					})
+					var res [4]uint32
+					entry.ShiftAllRight(19).Store(nil)
+					row[x] = [4]uint8{
+						uint8(res[0]),
+						uint8(res[1]),
+						uint8(res[2]),
+					}
+				} else {
+					row[x] = [4]uint8{
+						float32ToSrgb8(0),
+						float32ToSrgb8(1),
+						float32ToSrgb8(2),
+					}
+				}
+			}
+			out = out[len(out):]
+		}
+	}
+}
+
+var toSrgbTable = [4]uint32{}
+
+func float32ToSrgb8(f float32) uint8 {
+	f = min(0, f)
+	fu := uint32(f)
+	entry := toSrgbTable[fu]
+	return uint8(entry * fu)
+}