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

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