1 files changed, 253 insertions, 0 deletions
diff --git a/test/codegen/math.go b/test/codegen/math.go
new file mode 100644
index 0000000..331ebbe
--- /dev/null
+++ b/test/codegen/math.go
@@ -0,0 +1,253 @@
+// 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
+
+import "math"
+
+var sink64 [8]float64
+
+func approx(x float64) {
+	// amd64/v2:-".*x86HasSSE41" amd64/v3:-".*x86HasSSE41"
+	// amd64:"ROUNDSD\t[$]2"
+	// s390x:"FIDBR\t[$]6"
+	// arm64:"FRINTPD"
+	// ppc64x:"FRIP"
+	// wasm:"F64Ceil"
+	sink64[0] = math.Ceil(x)
+
+	// amd64/v2:-".*x86HasSSE41" amd64/v3:-".*x86HasSSE41"
+	// amd64:"ROUNDSD\t[$]1"
+	// s390x:"FIDBR\t[$]7"
+	// arm64:"FRINTMD"
+	// ppc64x:"FRIM"
+	// wasm:"F64Floor"
+	sink64[1] = math.Floor(x)
+
+	// s390x:"FIDBR\t[$]1"
+	// arm64:"FRINTAD"
+	// ppc64x:"FRIN"
+	sink64[2] = math.Round(x)
+
+	// amd64/v2:-".*x86HasSSE41" amd64/v3:-".*x86HasSSE41"
+	// amd64:"ROUNDSD\t[$]3"
+	// s390x:"FIDBR\t[$]5"
+	// arm64:"FRINTZD"
+	// ppc64x:"FRIZ"
+	// wasm:"F64Trunc"
+	sink64[3] = math.Trunc(x)
+
+	// amd64/v2:-".*x86HasSSE41" amd64/v3:-".*x86HasSSE41"
+	// amd64:"ROUNDSD\t[$]0"
+	// s390x:"FIDBR\t[$]4"
+	// arm64:"FRINTND"
+	// wasm:"F64Nearest"
+	sink64[4] = math.RoundToEven(x)
+}
+
+func sqrt(x float64) float64 {
+	// amd64:"SQRTSD"
+	// 386/sse2:"SQRTSD" 386/softfloat:-"SQRTD"
+	// arm64:"FSQRTD"
+	// arm/7:"SQRTD"
+	// mips/hardfloat:"SQRTD" mips/softfloat:-"SQRTD"
+	// mips64/hardfloat:"SQRTD" mips64/softfloat:-"SQRTD"
+	// wasm:"F64Sqrt"
+	// ppc64x:"FSQRT"
+	// riscv64: "FSQRTD"
+	return math.Sqrt(x)
+}
+
+func sqrt32(x float32) float32 {
+	// amd64:"SQRTSS"
+	// 386/sse2:"SQRTSS" 386/softfloat:-"SQRTS"
+	// arm64:"FSQRTS"
+	// arm/7:"SQRTF"
+	// mips/hardfloat:"SQRTF" mips/softfloat:-"SQRTF"
+	// mips64/hardfloat:"SQRTF" mips64/softfloat:-"SQRTF"
+	// wasm:"F32Sqrt"
+	// ppc64x:"FSQRTS"
+	// riscv64: "FSQRTS"
+	return float32(math.Sqrt(float64(x)))
+}
+
+// Check that it's using integer registers
+func abs(x, y float64) {
+	// amd64:"BTRQ\t[$]63"
+	// arm64:"FABSD\t"
+	// s390x:"LPDFR\t",-"MOVD\t"     (no integer load/store)
+	// ppc64x:"FABS\t"
+	// riscv64:"FABSD\t"
+	// wasm:"F64Abs"
+	// arm/6:"ABSD\t"
+	// mips64/hardfloat:"ABSD\t"
+	// mips/hardfloat:"ABSD\t"
+	sink64[0] = math.Abs(x)
+
+	// amd64:"BTRQ\t[$]63","PXOR"    (TODO: this should be BTSQ)
+	// s390x:"LNDFR\t",-"MOVD\t"     (no integer load/store)
+	// ppc64x:"FNABS\t"
+	sink64[1] = -math.Abs(y)
+}
+
+// Check that it's using integer registers
+func abs32(x float32) float32 {
+	// s390x:"LPDFR",-"LDEBR",-"LEDBR"     (no float64 conversion)
+	return float32(math.Abs(float64(x)))
+}
+
+// Check that it's using integer registers
+func copysign(a, b, c float64) {
+	// amd64:"BTRQ\t[$]63","ANDQ","ORQ"
+	// s390x:"CPSDR",-"MOVD"         (no integer load/store)
+	// ppc64x:"FCPSGN"
+	// riscv64:"FSGNJD"
+	// wasm:"F64Copysign"
+	sink64[0] = math.Copysign(a, b)
+
+	// amd64:"BTSQ\t[$]63"
+	// s390x:"LNDFR\t",-"MOVD\t"     (no integer load/store)
+	// ppc64x:"FCPSGN"
+	// riscv64:"FSGNJD"
+	// arm64:"ORR", -"AND"
+	sink64[1] = math.Copysign(c, -1)
+
+	// Like math.Copysign(c, -1), but with integer operations. Useful
+	// for platforms that have a copysign opcode to see if it's detected.
+	// s390x:"LNDFR\t",-"MOVD\t"     (no integer load/store)
+	sink64[2] = math.Float64frombits(math.Float64bits(a) | 1<<63)
+
+	// amd64:"ANDQ","ORQ"
+	// s390x:"CPSDR\t",-"MOVD\t"     (no integer load/store)
+	// ppc64x:"FCPSGN"
+	// riscv64:"FSGNJD"
+	sink64[3] = math.Copysign(-1, c)
+}
+
+func fma(x, y, z float64) float64 {
+	// amd64/v3:-".*x86HasFMA"
+	// amd64:"VFMADD231SD"
+	// arm/6:"FMULAD"
+	// arm64:"FMADDD"
+	// s390x:"FMADD"
+	// ppc64x:"FMADD"
+	// riscv64:"FMADDD"
+	return math.FMA(x, y, z)
+}
+
+func fms(x, y, z float64) float64 {
+	// riscv64:"FMSUBD"
+	return math.FMA(x, y, -z)
+}
+
+func fnms(x, y, z float64) float64 {
+	// riscv64:"FNMSUBD",-"FNMADDD"
+	return math.FMA(-x, y, z)
+}
+
+func fnma(x, y, z float64) float64 {
+	// riscv64:"FNMADDD",-"FNMSUBD"
+	return math.FMA(x, -y, -z)
+}
+
+func fromFloat64(f64 float64) uint64 {
+	// amd64:"MOVQ\tX.*, [^X].*"
+	// arm64:"FMOVD\tF.*, R.*"
+	// ppc64x:"MFVSRD"
+	// mips64/hardfloat:"MOVV\tF.*, R.*"
+	return math.Float64bits(f64+1) + 1
+}
+
+func fromFloat32(f32 float32) uint32 {
+	// amd64:"MOVL\tX.*, [^X].*"
+	// arm64:"FMOVS\tF.*, R.*"
+	// mips64/hardfloat:"MOVW\tF.*, R.*"
+	return math.Float32bits(f32+1) + 1
+}
+
+func toFloat64(u64 uint64) float64 {
+	// amd64:"MOVQ\t[^X].*, X.*"
+	// arm64:"FMOVD\tR.*, F.*"
+	// ppc64x:"MTVSRD"
+	// mips64/hardfloat:"MOVV\tR.*, F.*"
+	return math.Float64frombits(u64+1) + 1
+}
+
+func toFloat32(u32 uint32) float32 {
+	// amd64:"MOVL\t[^X].*, X.*"
+	// arm64:"FMOVS\tR.*, F.*"
+	// mips64/hardfloat:"MOVW\tR.*, F.*"
+	return math.Float32frombits(u32+1) + 1
+}
+
+// Test that comparisons with constants converted to float
+// are evaluated at compile-time
+
+func constantCheck64() bool {
+	// amd64:"(MOVB\t[$]0)|(XORL\t[A-Z][A-Z0-9]+, [A-Z][A-Z0-9]+)",-"FCMP",-"MOVB\t[$]1"
+	// s390x:"MOV(B|BZ|D)\t[$]0,",-"FCMPU",-"MOV(B|BZ|D)\t[$]1,"
+	return 0.5 == float64(uint32(1)) || 1.5 > float64(uint64(1<<63))
+}
+
+func constantCheck32() bool {
+	// amd64:"MOV(B|L)\t[$]1",-"FCMP",-"MOV(B|L)\t[$]0"
+	// s390x:"MOV(B|BZ|D)\t[$]1,",-"FCMPU",-"MOV(B|BZ|D)\t[$]0,"
+	return float32(0.5) <= float32(int64(1)) && float32(1.5) >= float32(int32(-1<<31))
+}
+
+// Test that integer constants are converted to floating point constants
+// at compile-time
+
+func constantConvert32(x float32) float32 {
+	// amd64:"MOVSS\t[$]f32.3f800000\\(SB\\)"
+	// s390x:"FMOVS\t[$]f32.3f800000\\(SB\\)"
+	// ppc64x:"FMOVS\t[$]f32.3f800000\\(SB\\)"
+	// arm64:"FMOVS\t[$]\\(1.0\\)"
+	if x > math.Float32frombits(0x3f800000) {
+		return -x
+	}
+	return x
+}
+
+func constantConvertInt32(x uint32) uint32 {
+	// amd64:-"MOVSS"
+	// s390x:-"FMOVS"
+	// ppc64x:-"FMOVS"
+	// arm64:-"FMOVS"
+	if x > math.Float32bits(1) {
+		return -x
+	}
+	return x
+}
+
+func nanGenerate64() float64 {
+	// Test to make sure we don't generate a NaN while constant propagating.
+	// See issue 36400.
+	zero := 0.0
+	// amd64:-"DIVSD"
+	inf := 1 / zero // +inf. We can constant propagate this one.
+	negone := -1.0
+
+	// amd64:"DIVSD"
+	z0 := zero / zero
+	// amd64:"MULSD"
+	z1 := zero * inf
+	// amd64:"SQRTSD"
+	z2 := math.Sqrt(negone)
+	return z0 + z1 + z2
+}
+
+func nanGenerate32() float32 {
+	zero := float32(0.0)
+	// amd64:-"DIVSS"
+	inf := 1 / zero // +inf. We can constant propagate this one.
+
+	// amd64:"DIVSS"
+	z0 := zero / zero
+	// amd64:"MULSS"
+	z1 := zero * inf
+	return z0 + z1
+}