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// Copyright ©2014 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package testblas
import (
"testing"
"gonum.org/v1/gonum/blas"
"gonum.org/v1/gonum/floats"
)
type Dtpmver interface {
Dtpmv(ul blas.Uplo, tA blas.Transpose, d blas.Diag, n int, ap []float64, x []float64, incX int)
}
func DtpmvTest(t *testing.T, blasser Dtpmver) {
for i, test := range []struct {
n int
a [][]float64
x []float64
d blas.Diag
ul blas.Uplo
tA blas.Transpose
ans []float64
}{
{
n: 3,
a: [][]float64{
{5, 6, 7},
{0, 9, 10},
{0, 0, 13},
},
x: []float64{3, 4, 5},
d: blas.NonUnit,
ul: blas.Upper,
tA: blas.NoTrans,
ans: []float64{74, 86, 65},
},
{
n: 3,
a: [][]float64{
{5, 6, 7},
{0, 9, 10},
{0, 0, 13},
},
x: []float64{3, 4, 5},
d: blas.Unit,
ul: blas.Upper,
tA: blas.NoTrans,
ans: []float64{62, 54, 5},
},
{
n: 3,
a: [][]float64{
{5, 0, 0},
{6, 9, 0},
{7, 10, 13},
},
x: []float64{3, 4, 5},
d: blas.NonUnit,
ul: blas.Lower,
tA: blas.NoTrans,
ans: []float64{15, 54, 126},
},
{
n: 3,
a: [][]float64{
{1, 0, 0},
{6, 1, 0},
{7, 10, 1},
},
x: []float64{3, 4, 5},
d: blas.Unit,
ul: blas.Lower,
tA: blas.NoTrans,
ans: []float64{3, 22, 66},
},
{
n: 3,
a: [][]float64{
{5, 6, 7},
{0, 9, 10},
{0, 0, 13},
},
x: []float64{3, 4, 5},
d: blas.NonUnit,
ul: blas.Upper,
tA: blas.Trans,
ans: []float64{15, 54, 126},
},
{
n: 3,
a: [][]float64{
{1, 6, 7},
{0, 1, 10},
{0, 0, 1},
},
x: []float64{3, 4, 5},
d: blas.Unit,
ul: blas.Upper,
tA: blas.Trans,
ans: []float64{3, 22, 66},
},
{
n: 3,
a: [][]float64{
{5, 0, 0},
{6, 9, 0},
{7, 10, 13},
},
x: []float64{3, 4, 5},
d: blas.NonUnit,
ul: blas.Lower,
tA: blas.Trans,
ans: []float64{74, 86, 65},
},
} {
incTest := func(incX, extra int) {
aFlat := flattenTriangular(test.a, test.ul)
x := makeIncremented(test.x, incX, extra)
blasser.Dtpmv(test.ul, test.tA, test.d, test.n, aFlat, x, incX)
ans := makeIncremented(test.ans, incX, extra)
if !floats.EqualApprox(x, ans, 1e-14) {
t.Errorf("Case %v, idx %v: Want %v, got %v.", i, incX, ans, x)
}
}
incTest(1, 0)
incTest(-3, 3)
incTest(4, 3)
}
}
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