gonum.org/v1/gonum@v0.14.0/internal/asm/f64/scal.go (about)

     1  // Copyright ©2016 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  //go:build !amd64 || noasm || gccgo || safe
     6  // +build !amd64 noasm gccgo safe
     7  
     8  package f64
     9  
    10  // ScalUnitary is
    11  //
    12  //	for i := range x {
    13  //		x[i] *= alpha
    14  //	}
    15  func ScalUnitary(alpha float64, x []float64) {
    16  	for i := range x {
    17  		x[i] *= alpha
    18  	}
    19  }
    20  
    21  // ScalUnitaryTo is
    22  //
    23  //	for i, v := range x {
    24  //		dst[i] = alpha * v
    25  //	}
    26  func ScalUnitaryTo(dst []float64, alpha float64, x []float64) {
    27  	for i, v := range x {
    28  		dst[i] = alpha * v
    29  	}
    30  }
    31  
    32  // ScalInc is
    33  //
    34  //	var ix uintptr
    35  //	for i := 0; i < int(n); i++ {
    36  //		x[ix] *= alpha
    37  //		ix += incX
    38  //	}
    39  func ScalInc(alpha float64, x []float64, n, incX uintptr) {
    40  	var ix uintptr
    41  	for i := 0; i < int(n); i++ {
    42  		x[ix] *= alpha
    43  		ix += incX
    44  	}
    45  }
    46  
    47  // ScalIncTo is
    48  //
    49  //	var idst, ix uintptr
    50  //	for i := 0; i < int(n); i++ {
    51  //		dst[idst] = alpha * x[ix]
    52  //		ix += incX
    53  //		idst += incDst
    54  //	}
    55  func ScalIncTo(dst []float64, incDst uintptr, alpha float64, x []float64, n, incX uintptr) {
    56  	var idst, ix uintptr
    57  	for i := 0; i < int(n); i++ {
    58  		dst[idst] = alpha * x[ix]
    59  		ix += incX
    60  		idst += incDst
    61  	}
    62  }