github.com/jingcheng-WU/gonum@v0.9.1-0.20210323123734-f1a2a11a8f7b/blas/testblas/zhpmv.go (about)

     1  // Copyright ©2017 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/jingcheng-WU/gonum/blas"
    11  )
    12  
    13  type Zhpmver interface {
    14  	Zhpmv(uplo blas.Uplo, n int, alpha complex128, ap []complex128, x []complex128, incX int, beta complex128, y []complex128, incY int)
    15  }
    16  
    17  func ZhpmvTest(t *testing.T, impl Zhpmver) {
    18  	for tc, test := range zhemvTestCases {
    19  		uplo := test.uplo
    20  		n := len(test.x)
    21  		alpha := test.alpha
    22  		beta := test.beta
    23  		for _, incX := range []int{-11, -2, -1, 1, 2, 7} {
    24  			for _, incY := range []int{-11, -2, -1, 1, 2, 7} {
    25  				x := makeZVector(test.x, incX)
    26  				xCopy := make([]complex128, len(x))
    27  				copy(xCopy, x)
    28  
    29  				y := makeZVector(test.y, incY)
    30  
    31  				ap := zPack(uplo, n, test.a, n)
    32  				apCopy := make([]complex128, len(ap))
    33  				copy(apCopy, ap)
    34  
    35  				impl.Zhpmv(test.uplo, n, alpha, ap, x, incX, beta, y, incY)
    36  
    37  				if !zsame(x, xCopy) {
    38  					t.Errorf("Case %v (incX=%v,incY=%v): unexpected modification of x", tc, incX, incY)
    39  				}
    40  				if !zsame(ap, apCopy) {
    41  					t.Errorf("Case %v (incX=%v,incY=%v): unexpected modification of A", tc, incX, incY)
    42  				}
    43  
    44  				var want []complex128
    45  				switch {
    46  				case incX > 0 && incY > 0:
    47  					want = makeZVector(test.want, incY)
    48  				case incX < 0 && incY > 0:
    49  					want = makeZVector(test.wantXNeg, incY)
    50  				case incX > 0 && incY < 0:
    51  					want = makeZVector(test.wantYNeg, incY)
    52  				default:
    53  					want = makeZVector(test.wantXYNeg, incY)
    54  				}
    55  				if !zsame(y, want) {
    56  					t.Errorf("Case %v (incX=%v,incY=%v): unexpected result\nwant %v\ngot  %v", tc, incX, incY, want, y)
    57  				}
    58  			}
    59  		}
    60  	}
    61  }