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84 lines
1.9 KiB
Go
84 lines
1.9 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"
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"math/rand/v2"
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"testing"
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"gonum.org/v1/gonum/floats"
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)
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type Dorgqrer interface {
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Dorg2rer
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Dorgqr(m, n, k int, a []float64, lda int, tau, work []float64, lwork int)
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}
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func DorgqrTest(t *testing.T, impl Dorgqrer) {
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rnd := rand.New(rand.NewPCG(1, 1))
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// TODO(btracey): Base tests off of nb and nx.
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for _, test := range []struct{ m, n, k, lda int }{
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{10, 10, 10, 0},
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{10, 10, 10, 20},
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{30, 10, 10, 0},
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{30, 20, 10, 20},
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{100, 100, 100, 0},
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{100, 100, 50, 0},
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{130, 100, 100, 0},
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{130, 100, 50, 0},
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{100, 100, 100, 150},
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{100, 100, 50, 150},
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{130, 100, 100, 150},
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{130, 100, 50, 150},
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{200, 200, 200, 0},
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{200, 200, 150, 0},
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{230, 200, 200, 0},
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{230, 200, 150, 0},
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{200, 200, 200, 250},
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{200, 200, 150, 250},
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{230, 200, 200, 250},
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{230, 200, 150, 250},
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} {
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m := test.m
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n := test.n
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k := test.k
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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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a := make([]float64, m*lda)
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for i := range a {
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a[i] = rnd.Float64()
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}
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work := make([]float64, 1)
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tau := make([]float64, min(m, n))
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for i := range tau {
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tau[i] = math.NaN()
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}
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// Compute QR factorization.
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impl.Dgeqrf(m, n, a, lda, tau, work, -1)
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work = make([]float64, int(work[0]))
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impl.Dgeqrf(m, n, a, lda, tau, work, len(work))
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aUnblocked := make([]float64, len(a))
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copy(aUnblocked, a)
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for i := range work {
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work[i] = math.NaN()
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}
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impl.Dorg2r(m, n, k, aUnblocked, lda, tau[:k], work)
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// make sure work isn't used before initialized
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for i := range work {
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work[i] = math.NaN()
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}
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impl.Dorgqr(m, n, k, a, lda, tau[:k], work, len(work))
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if !floats.EqualApprox(a, aUnblocked, 1e-10) {
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t.Errorf("Q Mismatch. m = %d, n = %d, k = %d, lda = %d", m, n, k, lda)
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}
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}
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}
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