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55 lines
1.1 KiB
Go
55 lines
1.1 KiB
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 testlapack
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import (
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"math/rand"
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"testing"
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)
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type Dgebd2er interface {
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Dgebd2(m, n int, a []float64, lda int, d, e, tauq, taup, work []float64)
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}
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func Dgebd2Test(t *testing.T, impl Dgebd2er) {
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rnd := rand.New(rand.NewSource(1))
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for _, test := range []struct {
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m, n, lda int
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}{
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{3, 4, 0},
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{4, 3, 0},
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{3, 4, 10},
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{4, 3, 10},
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} {
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m := test.m
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n := test.n
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lda := test.lda
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if lda == 0 {
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lda = n
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}
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nb := min(m, n) // 'nb' name parallel with Dlabrd code.
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a := make([]float64, m*lda)
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for i := range a {
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a[i] = rnd.NormFloat64()
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}
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d := nanSlice(nb)
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e := nanSlice(nb - 1)
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tauP := nanSlice(nb)
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tauQ := nanSlice(nb)
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work := nanSlice(max(m, n))
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aCopy := make([]float64, len(a))
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copy(aCopy, a)
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impl.Dgebd2(m, n, a, lda, d, e, tauQ, tauP, work)
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if m >= n && nb == n {
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tauP[n-1] = 0
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}
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if m < n && nb == m {
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tauQ[m-1] = 0
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}
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checkBidiagonal(t, m, n, nb, a, lda, d, e, tauP, tauQ, aCopy)
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}
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}
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