11#ifndef TLAPACK_BLAS_ROTM_HH
12#define TLAPACK_BLAS_ROTM_HH
71 enable_if_t<((-2 <= flag) && (flag <= 1)),
int> = 0,
72 class T = type_t<vectorX_t>,
73 enable_if_t<is_same_v<T, real_type<T> >,
int> = 0,
74 disable_if_allow_optblas_t<pair<vectorX_t, T>, pair<vectorY_t, T> > = 0>
81 const idx_t n = size(
x);
87 for (idx_t i = 0; i < n; ++i) {
89 y[i] =
h[3] *
y[i] +
h[1] *
x[i];
94 for (idx_t i = 0; i < n; ++i) {
96 y[i] =
y[i] +
h[1] *
x[i];
100 else if (
flag == 1) {
101 for (idx_t i = 0; i < n; ++i) {
103 y[i] =
h[3] *
y[i] -
x[i];
109#ifdef TLAPACK_USE_LAPACKPP
115 enable_if_t<((-2 <= flag) && (flag <= 1)),
int> = 0,
116 class T = type_t<vectorX_t>,
117 enable_if_t<is_same_v<T, real_type<T> >,
int> = 0,
118 enable_if_allow_optblas_t<pair<vectorX_t, T>, pair<vectorY_t, T> > = 0>
119void rotm(vectorX_t& x, vectorY_t& y,
const T h[4])
122 auto x_ = legacy_vector(x);
123 auto y_ = legacy_vector(y);
126 const auto& n = x_.n;
127 const T h_[] = {(T)flag, h[0], h[1], h[2], h[3]};
129 return ::blas::rotm(n, x_.ptr, x_.inc, y_.ptr, y_.inc, h_);
#define TLAPACK_LEGACY_VECTOR
Macro for tlapack::concepts::LegacyVector compatible with C++17.
Definition concepts.hpp:954
#define TLAPACK_VECTOR
Macro for tlapack::concepts::Vector compatible with C++17.
Definition concepts.hpp:906
void rotm(vectorX_t &x, vectorY_t &y, const T h[4])
Apply modified (fast) plane rotation, H:
Definition rotm.hpp:75
#define tlapack_check_false(cond)
Throw an error if cond is true.
Definition exceptionHandling.hpp:113
typename traits::real_type_traits< Types..., int >::type real_type
The common real type of the list of types.
Definition scalar_type_traits.hpp:113