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// Copyright ©2017 The Gonum 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 f64_test
import (
"fmt"
"testing"
. "gonum.org/v1/gonum/internal/asm/f64"
)
const testLen = 50e5
var (
a = 2.0
x = make([]float64, testLen)
y = make([]float64, testLen)
z = make([]float64, testLen)
)
func init() {
for n := range x {
x[n] = float64(n)
y[n] = float64(n)
}
}
func BenchmarkAxpyUnitary(t *testing.B) {
naiveaxpyu := func(a float64, x, y []float64) {
for i, v := range x {
y[i] += a * v
}
}
tests := []struct {
name string
f func(a float64, x, y []float64)
}{
{"AxpyUnitary", AxpyUnitary},
{"NaiveAxpyUnitary", naiveaxpyu},
}
for _, test := range tests {
for _, ln := range []uintptr{1, 3, 10, 30, 1e2, 3e2, 1e3, 3e3, 1e4, 3e4, 1e5} {
t.Run(fmt.Sprintf("%s-%d", test.name, ln), func(b *testing.B) {
b.SetBytes(int64(64 * ln))
x, y := x[:ln], y[:ln]
b.ResetTimer()
for i := 0; i < b.N; i++ {
test.f(a, x, y)
}
})
}
}
}
func BenchmarkAxpyUnitaryTo(t *testing.B) {
naiveaxpyut := func(d []float64, a float64, x, y []float64) {
for i, v := range x {
d[i] = y[i] + a*v
}
}
tests := []struct {
name string
f func(z []float64, a float64, x, y []float64)
}{
{"AxpyUnitaryTo", AxpyUnitaryTo},
{"NaiveAxpyUnitaryTo", naiveaxpyut},
}
for _, test := range tests {
for _, ln := range []uintptr{1, 3, 10, 30, 1e2, 3e2, 1e3, 3e3, 1e4, 3e4, 1e5} {
t.Run(fmt.Sprintf("%s-%d", test.name, ln), func(b *testing.B) {
b.SetBytes(int64(64 * ln))
x, y, z := x[:ln], y[:ln], z[:ln]
b.ResetTimer()
for i := 0; i < b.N; i++ {
test.f(z, a, x, y)
}
})
}
}
}
var incsAxpy = []struct {
len uintptr
inc []int
}{
{1, []int{1}},
{2, []int{1, 2, 4, 10}},
{3, []int{1, 2, 4, 10}},
{4, []int{1, 2, 4, 10}},
{5, []int{1, 2, 4, 10}},
{10, []int{1, 2, 4, 10}},
{500, []int{1, 2, 4, 10}},
{1e3, []int{1, 2, 4, 10}},
{1e4, []int{1, 2, 4, 10, -1, -2, -4, -10}},
}
func BenchmarkAxpyInc(t *testing.B) {
naiveaxpyinc := func(alpha float64, x, y []float64, n, incX, incY, ix, iy uintptr) {
for i := 0; i < int(n); i++ {
y[iy] += alpha * x[ix]
ix += incX
iy += incY
}
}
tests := []struct {
name string
f func(alpha float64, x, y []float64, n, incX, incY, ix, iy uintptr)
}{
{"AxpyInc", AxpyInc},
{"NaiveAxpyInc", naiveaxpyinc},
}
for _, test := range tests {
for _, tt := range incsAxpy {
for _, inc := range tt.inc {
t.Run(fmt.Sprintf("%s-%d-inc(%d)", test.name, tt.len, inc), func(b *testing.B) {
b.SetBytes(int64(64 * tt.len))
var idx, tstInc uintptr = 0, uintptr(inc)
if inc < 0 {
idx = uintptr((-int(tt.len) + 1) * inc)
}
for i := 0; i < b.N; i++ {
test.f(a, x, y, uintptr(tt.len), tstInc, tstInc, idx, idx)
}
})
}
}
}
}
func BenchmarkAxpyIncTo(t *testing.B) {
naiveaxpyincto := func(dst []float64, incDst, idst uintptr, alpha float64, x, y []float64, n, incX, incY, ix, iy uintptr) {
for i := 0; i < int(n); i++ {
dst[idst] = alpha*x[ix] + y[iy]
ix += incX
iy += incY
idst += incDst
}
}
tests := []struct {
name string
f func(dst []float64, incDst, idst uintptr, alpha float64, x, y []float64, n, incX, incY, ix, iy uintptr)
}{
{"AxpyIncTo", AxpyIncTo},
{"NaiveAxpyIncTo", naiveaxpyincto},
}
for _, test := range tests {
for _, tt := range incsAxpy {
for _, inc := range tt.inc {
t.Run(fmt.Sprintf("%s-%d-inc(%d)", test.name, tt.len, inc), func(b *testing.B) {
b.SetBytes(int64(64 * tt.len))
var idx, tstInc uintptr = 0, uintptr(inc)
if inc < 0 {
idx = uintptr((-int(tt.len) + 1) * inc)
}
for i := 0; i < b.N; i++ {
test.f(z, tstInc, idx, a, x, y, uintptr(tt.len),
tstInc, tstInc, idx, idx)
}
})
}
}
}
}
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