mirror of
https://github.com/gonum/gonum.git
synced 2025-09-27 03:26:04 +08:00
5f0141ca4c
Changes made in dsp/fourier/internal/fftpack break the formatting used there, so these are reverted. There will be complaints in CI. [git-generate] gofmt -w . go generate gonum.org/v1/gonum/blas go generate gonum.org/v1/gonum/blas/gonum go generate gonum.org/v1/gonum/unit go generate gonum.org/v1/gonum/unit/constant go generate gonum.org/v1/gonum/graph/formats/dot go generate gonum.org/v1/gonum/graph/formats/rdf go generate gonum.org/v1/gonum/stat/card git checkout -- dsp/fourier/internal/fftpack
138 lines
2.4 KiB
Go
138 lines
2.4 KiB
Go
// Copyright ©2016 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.
|
|
|
|
//go:build !amd64 || noasm || gccgo || safe
|
|
// +build !amd64 noasm gccgo safe
|
|
|
|
package f32
|
|
|
|
// AxpyUnitary is
|
|
//
|
|
// for i, v := range x {
|
|
// y[i] += alpha * v
|
|
// }
|
|
func AxpyUnitary(alpha float32, x, y []float32) {
|
|
for i, v := range x {
|
|
y[i] += alpha * v
|
|
}
|
|
}
|
|
|
|
// AxpyUnitaryTo is
|
|
//
|
|
// for i, v := range x {
|
|
// dst[i] = alpha*v + y[i]
|
|
// }
|
|
func AxpyUnitaryTo(dst []float32, alpha float32, x, y []float32) {
|
|
for i, v := range x {
|
|
dst[i] = alpha*v + y[i]
|
|
}
|
|
}
|
|
|
|
// AxpyInc is
|
|
//
|
|
// for i := 0; i < int(n); i++ {
|
|
// y[iy] += alpha * x[ix]
|
|
// ix += incX
|
|
// iy += incY
|
|
// }
|
|
func AxpyInc(alpha float32, x, y []float32, n, incX, incY, ix, iy uintptr) {
|
|
for i := 0; i < int(n); i++ {
|
|
y[iy] += alpha * x[ix]
|
|
ix += incX
|
|
iy += incY
|
|
}
|
|
}
|
|
|
|
// AxpyIncTo is
|
|
//
|
|
// for i := 0; i < int(n); i++ {
|
|
// dst[idst] = alpha*x[ix] + y[iy]
|
|
// ix += incX
|
|
// iy += incY
|
|
// idst += incDst
|
|
// }
|
|
func AxpyIncTo(dst []float32, incDst, idst uintptr, alpha float32, x, y []float32, 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
|
|
}
|
|
}
|
|
|
|
// DotUnitary is
|
|
//
|
|
// for i, v := range x {
|
|
// sum += y[i] * v
|
|
// }
|
|
// return sum
|
|
func DotUnitary(x, y []float32) (sum float32) {
|
|
for i, v := range x {
|
|
sum += y[i] * v
|
|
}
|
|
return sum
|
|
}
|
|
|
|
// DotInc is
|
|
//
|
|
// for i := 0; i < int(n); i++ {
|
|
// sum += y[iy] * x[ix]
|
|
// ix += incX
|
|
// iy += incY
|
|
// }
|
|
// return sum
|
|
func DotInc(x, y []float32, n, incX, incY, ix, iy uintptr) (sum float32) {
|
|
for i := 0; i < int(n); i++ {
|
|
sum += y[iy] * x[ix]
|
|
ix += incX
|
|
iy += incY
|
|
}
|
|
return sum
|
|
}
|
|
|
|
// DdotUnitary is
|
|
//
|
|
// for i, v := range x {
|
|
// sum += float64(y[i]) * float64(v)
|
|
// }
|
|
// return
|
|
func DdotUnitary(x, y []float32) (sum float64) {
|
|
for i, v := range x {
|
|
sum += float64(y[i]) * float64(v)
|
|
}
|
|
return
|
|
}
|
|
|
|
// DdotInc is
|
|
//
|
|
// for i := 0; i < int(n); i++ {
|
|
// sum += float64(y[iy]) * float64(x[ix])
|
|
// ix += incX
|
|
// iy += incY
|
|
// }
|
|
// return
|
|
func DdotInc(x, y []float32, n, incX, incY, ix, iy uintptr) (sum float64) {
|
|
for i := 0; i < int(n); i++ {
|
|
sum += float64(y[iy]) * float64(x[ix])
|
|
ix += incX
|
|
iy += incY
|
|
}
|
|
return
|
|
}
|
|
|
|
// Sum is
|
|
//
|
|
// var sum float32
|
|
// for _, v := range x {
|
|
// sum += v
|
|
// }
|
|
// return sum
|
|
func Sum(x []float32) float32 {
|
|
var sum float32
|
|
for _, v := range x {
|
|
sum += v
|
|
}
|
|
return sum
|
|
}
|