nlpodyssey/spago

// 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 asm64

// ScalUnitary is
//
//    for i := range x {
//        x[i] *= alpha
//    }
func ScalUnitary(alpha float64, x []float64) {
    for i := range x {
        x[i] *= alpha
    }
}

// ScalUnitaryTo is
//
//    for i, v := range x {
//        dst[i] = alpha * v
//    }
func ScalUnitaryTo(dst []float64, alpha float64, x []float64) {
    for i, v := range x {
        dst[i] = alpha * v
    }
}

// ScalInc is
//
//    var ix uintptr
//    for i := 0; i < int(n); i++ {
//        x[ix] *= alpha
//        ix += incX
//    }
func ScalInc(alpha float64, x []float64, n, incX uintptr) {
    var ix uintptr
    for i := 0; i < int(n); i++ {
        x[ix] *= alpha
        ix += incX
    }
}

// ScalIncTo is
//
//    var idst, ix uintptr
//    for i := 0; i < int(n); i++ {
//        dst[idst] = alpha * x[ix]
//        ix += incX
//        idst += incDst
//    }
func ScalIncTo(dst []float64, incDst uintptr, alpha float64, x []float64, n, incX uintptr) {
    var idst, ix uintptr
    for i := 0; i < int(n); i++ {
        dst[idst] = alpha * x[ix]
        ix += incX
        idst += incDst
    }
}