1// Copyright ©2015 The Gonum Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// +build !amd64 noasm appengine safe
6
7package f64
8
9// AxpyUnitary is
10//  for i, v := range x {
11//  	y[i] += alpha * v
12//  }
13func AxpyUnitary(alpha float64, x, y []float64) {
14	for i, v := range x {
15		y[i] += alpha * v
16	}
17}
18
19// AxpyUnitaryTo is
20//  for i, v := range x {
21//  	dst[i] = alpha*v + y[i]
22//  }
23func AxpyUnitaryTo(dst []float64, alpha float64, x, y []float64) {
24	for i, v := range x {
25		dst[i] = alpha*v + y[i]
26	}
27}
28
29// AxpyInc is
30//  for i := 0; i < int(n); i++ {
31//  	y[iy] += alpha * x[ix]
32//  	ix += incX
33//  	iy += incY
34//  }
35func AxpyInc(alpha float64, x, y []float64, n, incX, incY, ix, iy uintptr) {
36	for i := 0; i < int(n); i++ {
37		y[iy] += alpha * x[ix]
38		ix += incX
39		iy += incY
40	}
41}
42
43// AxpyIncTo is
44//  for i := 0; i < int(n); i++ {
45//  	dst[idst] = alpha*x[ix] + y[iy]
46//  	ix += incX
47//  	iy += incY
48//  	idst += incDst
49//  }
50func AxpyIncTo(dst []float64, incDst, idst uintptr, alpha float64, x, y []float64, n, incX, incY, ix, iy uintptr) {
51	for i := 0; i < int(n); i++ {
52		dst[idst] = alpha*x[ix] + y[iy]
53		ix += incX
54		iy += incY
55		idst += incDst
56	}
57}
58