github.com/gopherd/gonum@v0.0.4/blas/testblas/dtpmv.go (about)

     1  // Copyright ©2014 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  package testblas
     6  
     7  import (
     8  	"testing"
     9  
    10  	"github.com/gopherd/gonum/blas"
    11  	"github.com/gopherd/gonum/floats"
    12  )
    13  
    14  type Dtpmver interface {
    15  	Dtpmv(ul blas.Uplo, tA blas.Transpose, d blas.Diag, n int, ap []float64, x []float64, incX int)
    16  }
    17  
    18  func DtpmvTest(t *testing.T, blasser Dtpmver) {
    19  	for i, test := range []struct {
    20  		n   int
    21  		a   [][]float64
    22  		x   []float64
    23  		d   blas.Diag
    24  		ul  blas.Uplo
    25  		tA  blas.Transpose
    26  		ans []float64
    27  	}{
    28  		{
    29  			n: 3,
    30  			a: [][]float64{
    31  				{5, 6, 7},
    32  				{0, 9, 10},
    33  				{0, 0, 13},
    34  			},
    35  			x:   []float64{3, 4, 5},
    36  			d:   blas.NonUnit,
    37  			ul:  blas.Upper,
    38  			tA:  blas.NoTrans,
    39  			ans: []float64{74, 86, 65},
    40  		},
    41  		{
    42  			n: 3,
    43  			a: [][]float64{
    44  				{5, 6, 7},
    45  				{0, 9, 10},
    46  				{0, 0, 13},
    47  			},
    48  			x:   []float64{3, 4, 5},
    49  			d:   blas.Unit,
    50  			ul:  blas.Upper,
    51  			tA:  blas.NoTrans,
    52  			ans: []float64{62, 54, 5},
    53  		},
    54  		{
    55  			n: 3,
    56  			a: [][]float64{
    57  				{5, 0, 0},
    58  				{6, 9, 0},
    59  				{7, 10, 13},
    60  			},
    61  			x:   []float64{3, 4, 5},
    62  			d:   blas.NonUnit,
    63  			ul:  blas.Lower,
    64  			tA:  blas.NoTrans,
    65  			ans: []float64{15, 54, 126},
    66  		},
    67  		{
    68  			n: 3,
    69  			a: [][]float64{
    70  				{1, 0, 0},
    71  				{6, 1, 0},
    72  				{7, 10, 1},
    73  			},
    74  			x:   []float64{3, 4, 5},
    75  			d:   blas.Unit,
    76  			ul:  blas.Lower,
    77  			tA:  blas.NoTrans,
    78  			ans: []float64{3, 22, 66},
    79  		},
    80  		{
    81  			n: 3,
    82  			a: [][]float64{
    83  				{5, 6, 7},
    84  				{0, 9, 10},
    85  				{0, 0, 13},
    86  			},
    87  			x:   []float64{3, 4, 5},
    88  			d:   blas.NonUnit,
    89  			ul:  blas.Upper,
    90  			tA:  blas.Trans,
    91  			ans: []float64{15, 54, 126},
    92  		},
    93  		{
    94  			n: 3,
    95  			a: [][]float64{
    96  				{1, 6, 7},
    97  				{0, 1, 10},
    98  				{0, 0, 1},
    99  			},
   100  			x:   []float64{3, 4, 5},
   101  			d:   blas.Unit,
   102  			ul:  blas.Upper,
   103  			tA:  blas.Trans,
   104  			ans: []float64{3, 22, 66},
   105  		},
   106  		{
   107  			n: 3,
   108  			a: [][]float64{
   109  				{5, 0, 0},
   110  				{6, 9, 0},
   111  				{7, 10, 13},
   112  			},
   113  			x:   []float64{3, 4, 5},
   114  			d:   blas.NonUnit,
   115  			ul:  blas.Lower,
   116  			tA:  blas.Trans,
   117  			ans: []float64{74, 86, 65},
   118  		},
   119  	} {
   120  		incTest := func(incX, extra int) {
   121  			aFlat := flattenTriangular(test.a, test.ul)
   122  			x := makeIncremented(test.x, incX, extra)
   123  			blasser.Dtpmv(test.ul, test.tA, test.d, test.n, aFlat, x, incX)
   124  			ans := makeIncremented(test.ans, incX, extra)
   125  			if !floats.EqualApprox(x, ans, 1e-14) {
   126  				t.Errorf("Case %v, idx %v: Want %v, got %v.", i, incX, ans, x)
   127  			}
   128  		}
   129  		incTest(1, 0)
   130  		incTest(-3, 3)
   131  		incTest(4, 3)
   132  	}
   133  }