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Control scalar execution or vector under generic. Disable Eigen vectorisation on powerpc / SUmmit

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This commit is contained in:
Peter Boyle 2018-04-12 12:32:57 -04:00
parent 6411caad67
commit a8a0bb85cc
3 changed files with 46 additions and 2 deletions
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14
configure.ac
View File

@ -234,6 +234,20 @@ AC_ARG_ENABLE([gen-simd-width],
[ac_gen_simd_width=$enable_gen_simd_width],
[ac_gen_simd_width=32])
AC_ARG_ENABLE([gen-scalar],
[AS_HELP_STRING([--enable-gen-scalar=yes|no],
[enable generic scalar implementation])],
[ac_gen_scalar=$enable_gen_scalar],
[ac_gen_scalar=no])
case ${ac_gen_scalar} in
yes)
AC_DEFINE([GENERIC_SCALAR],[1],[Use scalar data parallel loops])
;;
*)
;;
esac
##################### Compiler dependent choices
case ${CXX} in
nvcc)

30
lib/simd/Grid_generic_types.h
View File

@ -29,9 +29,10 @@ Author: Antonin Portelli <antonin.portelli@me.com>
static_assert(GEN_SIMD_WIDTH % 16u == 0, "SIMD vector size is not an integer multiple of 16 bytes");
//#define VECTOR_LOOPS
#undef VECTOR_LOOPS
// playing with compiler pragmas
#ifdef VECTOR_LOOPS
#ifdef __clang__
#define VECTOR_FOR(i, w, inc) \
@ -53,6 +54,31 @@ static_assert(GEN_SIMD_WIDTH % 16u == 0, "SIMD vector size is not an integer mul
NAMESPACE_BEGIN(Grid);
NAMESPACE_BEGIN(Optimization);
#ifdef GENERIC_SCALAR
// type traits giving the number of elements for each vector type
template <typename T> struct W;
template <> struct W<double> {
constexpr static unsigned int c = 1;
constexpr static unsigned int r = 2;
};
template <> struct W<float> {
constexpr static unsigned int c = 1;
constexpr static unsigned int r = 2;
};
template <> struct W<Integer> {
constexpr static unsigned int r = 1;
};
template <> struct W<uint16_t> {
constexpr static unsigned int c = 1;
constexpr static unsigned int r = 2;
};
// SIMD vector types
template <typename T>
struct vec {
T v[W<T>::r];
};
#else
// type traits giving the number of elements for each vector type
template <typename T> struct W;
template <> struct W<double> {
@ -70,12 +96,12 @@ template <> struct W<uint16_t> {
constexpr static unsigned int c = GEN_SIMD_WIDTH/4u;
constexpr static unsigned int r = GEN_SIMD_WIDTH/2u;
};
// SIMD vector types
template <typename T>
struct vec {
alignas(GEN_SIMD_WIDTH) T v[W<T>::r];
};
#endif
typedef vec<float> vecf;
typedef vec<double> vecd;

4
lib/simd/Grid_vector_types.h
View File

@ -138,6 +138,7 @@ public:
Vector_type v;
static accelerator_inline constexpr int Nsimd(void) {
static_assert( (sizeof(Vector_type) / sizeof(Scalar_type) >= 1), " size mismatch " );
return sizeof(Vector_type) / sizeof(Scalar_type);
}
@ -831,13 +832,16 @@ accelerator_inline void precisionChange(vComplexD *out,vComplexH *in,int nvec){
accelerator_inline void precisionChange(vComplexF *out,vComplexH *in,int nvec){ precisionChange((vRealF *)out,(vRealH *)in,nvec);}
// Check our vector types are of an appropriate size.
#if defined QPX
static_assert(2*sizeof(SIMD_Ftype) == sizeof(SIMD_Dtype), "SIMD vector lengths incorrect");
static_assert(2*sizeof(SIMD_Ftype) == sizeof(SIMD_Itype), "SIMD vector lengths incorrect");
#else
#ifndef GENERIC_SCALAR
static_assert(sizeof(SIMD_Ftype) == sizeof(SIMD_Dtype), "SIMD vector lengths incorrect");
static_assert(sizeof(SIMD_Ftype) == sizeof(SIMD_Itype), "SIMD vector lengths incorrect");
#endif
#endif
/////////////////////////////////////////
// Some traits to recognise the types