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41 lines
968 B
Go
41 lines
968 B
Go
// Copyright ©2015 The gonum Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package native
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import "github.com/gonum/blas"
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// Dlacpy copies the elements of A specified by uplo into B. Uplo can specify
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// a triangular portion with blas.Upper or blas.Lower, or can specify all of the
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// elemest with blas.All.
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func (impl Implementation) Dlacpy(uplo blas.Uplo, m, n int, a []float64, lda int, b []float64, ldb int) {
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checkMatrix(m, n, a, lda)
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checkMatrix(m, n, b, ldb)
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switch uplo {
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default:
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panic(badUplo)
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case blas.Upper:
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for i := 0; i < m; i++ {
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for j := i; j < n; j++ {
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b[i*ldb+j] = a[i*lda+j]
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}
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}
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return
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case blas.Lower:
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for i := 0; i < m; i++ {
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for j := 0; j < min(i, n); j++ {
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b[i*ldb+j] = a[i*lda+j]
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}
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}
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return
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case blas.All:
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for i := 0; i < m; i++ {
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for j := 0; j < n; j++ {
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b[i*ldb+j] = a[i*lda+j]
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}
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}
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return
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}
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}
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