lapack/testlapack: fix test for Dpbcon
@@ -45,8 +45,6 @@ func dpbconTest(t *testing.T, impl Dpbconer, uplo blas.Uplo, n, kd, ldab int, rn
// Generate a random symmetric positive definite band matrix.
ab := randSymBand(uplo, n, kd, ldab, rnd)
- abCopy := make([]float64, len(ab))
- copy(abCopy, ab)
// Compute the Cholesky decomposition of A.
abFac := make([]float64, len(ab))
@@ -62,9 +60,11 @@ func dpbconTest(t *testing.T, impl Dpbconer, uplo blas.Uplo, n, kd, ldab int, rn
// Compute an estimate of rCond.
iwork := make([]int, n)
- rCondGot := impl.Dpbcon(uplo, n, kd, ab, ldab, aNorm, work, iwork)
+ abFacCopy := make([]float64, len(abFac))
+ copy(abFacCopy, abFac)
+ rCondGot := impl.Dpbcon(uplo, n, kd, abFac, ldab, aNorm, work, iwork)
- if !floats.Equal(ab, abCopy) {
+ if !floats.Equal(abFac, abFacCopy) {
t.Errorf("%v: unexpected modification of ab", name)
}
@@ -75,7 +75,7 @@ func dpbconTest(t *testing.T, impl Dpbconer, uplo blas.Uplo, n, kd, ldab int, rn
for i := 0; i < n; i++ {
aInv[i*lda+i] = 1
}
- impl.Dpbtrs(uplo, n, kd, n, ab, ldab, aInv, lda)
+ impl.Dpbtrs(uplo, n, kd, n, abFac, ldab, aInv, lda)
aInvNorm := impl.Dlange(lapack.MaxColumnSum, n, n, aInv, lda, work)
rCondWant := 1.0
if aNorm > 0 && aInvNorm > 0 {
