Rotg: implementation of BLAS level1 rotg

blas/CMakeLists.txt

@@ -248,6 +248,13 @@ KOKKOSKERNELS_GENERATE_ETI(Blas1_reciprocal_mv reciprocal
   TYPE_LISTS  FLOATS LAYOUTS DEVICES
 )
 
+KOKKOSKERNELS_GENERATE_ETI(Blas1_rotg rotg
+  COMPONENTS  blas
+  HEADER_LIST ETI_HEADERS
+  SOURCE_LIST SOURCES
+  TYPE_LISTS  FLOATS
+)
+
 KOKKOSKERNELS_GENERATE_ETI(Blas2_gemv gemv
   COMPONENTS  blas
   HEADER_LIST ETI_HEADERS

blas/eti/generated_specializations_cpp/rotg/KokkosBlas1_rotg_eti_spec_inst.cpp.in

@@ -0,0 +1,54 @@
+/*
+//@HEADER
+// ************************************************************************
+//
+//                        Kokkos v. 3.0
+//       Copyright (2020) National Technology & Engineering
+//               Solutions of Sandia, LLC (NTESS).
+//
+// Under the terms of Contract DE-NA0003525 with NTESS,
+// the U.S. Government retains certain rights in this software.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// 3. Neither the name of the Corporation nor the names of the
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY NTESS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NTESS OR THE
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Questions? Contact Siva Rajamanickam (srajama@sandia.gov)
+//
+// ************************************************************************
+//@HEADER
+*/
+
+
+#define KOKKOSKERNELS_IMPL_COMPILE_LIBRARY true
+#include "KokkosKernels_config.h"
+#include "KokkosBlas1_rotg_spec.hpp"
+
+namespace KokkosBlas {
+namespace Impl {
+@BLAS1_ROTG_ETI_INST_BLOCK@
+} //IMPL 
+} //Kokkos

blas/eti/generated_specializations_hpp/KokkosBlas1_rotg_eti_spec_avail.hpp.in

@@ -0,0 +1,51 @@
+/*
+//@HEADER
+// ************************************************************************
+//
+//               KokkosKernels 0.9: Linear Algebra and Graph Kernels
+//                 Copyright 2017 Sandia Corporation
+//
+// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
+// the U.S. Government retains certain rights in this software.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// 3. Neither the name of the Corporation nor the names of the
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Questions? Contact Siva Rajamanickam (srajama@sandia.gov)
+//
+// ************************************************************************
+//@HEADER
+*/
+#ifndef KOKKOSBLAS1_ROTG_ETI_SPEC_AVAIL_HPP_
+#define KOKKOSBLAS1_ROTG_ETI_SPEC_AVAIL_HPP_
+
+namespace KokkosBlas {
+namespace Impl {
+@BLAS1_ROTG_ETI_AVAIL_BLOCK@
+  } //IMPL 
+} //Kokkos
+#endif

blas/eti/generated_specializations_hpp/KokkosBlas1_rotg_eti_spec_decl.hpp.in

@@ -0,0 +1,51 @@
+/*
+//@HEADER
+// ************************************************************************
+//
+//               KokkosKernels 0.9: Linear Algebra and Graph Kernels
+//                 Copyright 2017 Sandia Corporation
+//
+// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
+// the U.S. Government retains certain rights in this software.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// 3. Neither the name of the Corporation nor the names of the
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Questions? Contact Siva Rajamanickam (srajama@sandia.gov)
+//
+// ************************************************************************
+//@HEADER
+*/
+#ifndef KOKKOSBLAS1_ROTG_ETI_SPEC_DECL_HPP_
+#define KOKKOSBLAS1_ROTG_ETI_SPEC_DECL_HPP_
+
+namespace KokkosBlas {
+namespace Impl {
+@BLAS1_ROTG_ETI_DECL_BLOCK@
+  } //IMPL 
+} //Kokkos
+#endif

blas/impl/KokkosBlas1_rotg_impl.hpp

@@ -0,0 +1,122 @@
+/*
+//@HEADER
+// ************************************************************************
+//
+//                        Kokkos v. 3.0
+//       Copyright (2020) National Technology & Engineering
+//               Solutions of Sandia, LLC (NTESS).
+//
+// Under the terms of Contract DE-NA0003525 with NTESS,
+// the U.S. Government retains certain rights in this software.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// 3. Neither the name of the Corporation nor the names of the
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY NTESS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NTESS OR THE
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Questions? Contact Siva Rajamanickam (srajama@sandia.gov)
+//
+// ************************************************************************
+//@HEADER
+*/
+#ifndef KOKKOSBLAS1_ROTG_IMPL_HPP_
+#define KOKKOSBLAS1_ROTG_IMPL_HPP_
+
+#include <KokkosKernels_config.h>
+#include <Kokkos_Core.hpp>
+#include <KokkosBlas1_rotg_spec.hpp>
+
+namespace KokkosBlas {
+namespace Impl {
+
+/// \brief Compute Givens rotation coefficients.
+template <class Scalar,
+          typename std::enable_if<!Kokkos::ArithTraits<Scalar>::is_complex,
+                                  bool>::type = true>
+void Rotg_Invoke(Scalar& a, Scalar& b, Scalar& c, Scalar& s) {
+  const Scalar one  = Kokkos::ArithTraits<Scalar>::one();
+  const Scalar zero = Kokkos::ArithTraits<Scalar>::zero();
+
+  const Scalar numerical_scaling = Kokkos::abs(a) + Kokkos::abs(b);
+  if (numerical_scaling == zero) {
+    c = one;
+    s = zero;
+    a = zero;
+    b = zero;
+  } else {
+    const Scalar scaled_a = a / numerical_scaling;
+    const Scalar scaled_b = b / numerical_scaling;
+    Scalar norm = Kokkos::sqrt(scaled_a * scaled_a + scaled_b * scaled_b) *
+                  numerical_scaling;
+    Scalar sign = Kokkos::abs(a) > Kokkos::abs(b) ? a : b;
+    norm        = Kokkos::copysign(norm, sign);
+    c           = a / norm;
+    s           = b / norm;
+
+    Scalar z = one;
+    if (Kokkos::abs(a) > Kokkos::abs(b)) {
+      z = s;
+    }
+    if ((Kokkos::abs(b) >= Kokkos::abs(a)) && (c != zero)) {
+      z = one / c;
+    }
+    a = norm;
+    b = z;
+  }
+}
+
+template <class Scalar,
+          typename std::enable_if<Kokkos::ArithTraits<Scalar>::is_complex,
+                                  bool>::type = true>
+void Rotg_Invoke(Scalar& a, Scalar& b,
+                 typename Kokkos::ArithTraits<Scalar>::mag_type& c, Scalar& s) {
+  using mag_type = typename Kokkos::ArithTraits<Scalar>::mag_type;
+
+  const Scalar one        = Kokkos::ArithTraits<Scalar>::one();
+  const Scalar zero       = Kokkos::ArithTraits<Scalar>::zero();
+  const mag_type mag_zero = Kokkos::ArithTraits<mag_type>::zero();
+
+  const mag_type numerical_scaling = Kokkos::abs(a) + Kokkos::abs(b);
+  if (Kokkos::abs(a) == zero) {
+    c = mag_zero;
+    s = one;
+    a = b;
+  } else {
+    const Scalar scaled_a = Kokkos::abs(a / numerical_scaling);
+    const Scalar scaled_b = Kokkos::abs(b / numerical_scaling);
+    mag_type norm =
+        Kokkos::abs(Kokkos::sqrt(scaled_a * scaled_a + scaled_b * scaled_b)) *
+        numerical_scaling;
+    Scalar unit_a = a / Kokkos::abs(a);
+    c             = Kokkos::abs(a) / norm;
+    s             = unit_a * Kokkos::conj(b) / norm;
+    a             = unit_a * norm;
+  }
+}
+
+}  // namespace Impl
+}  // namespace KokkosBlas
+
+#endif  // KOKKOSBLAS1_ROTG_IMPL_HPP_