mirror of
https://github.com/paboyle/Grid.git
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342 lines
8.7 KiB
C++
342 lines
8.7 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/simd/Grid_neon.h
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Copyright (C) 2015
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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Author: neo <cossu@post.kek.jp>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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//----------------------------------------------------------------------
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/*! @file Grid_sse4.h
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@brief Optimization libraries for NEON (ARM) instructions set ARMv8
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Experimental - Using intrinsics - DEVELOPING!
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*/
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// Time-stamp: <2015-07-10 17:45:09 neo>
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//----------------------------------------------------------------------
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#include <arm_neon.h>
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// ARMv8 supports double precision
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namespace Optimization {
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template<class vtype>
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union uconv {
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float32x4_t f;
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vtype v;
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};
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union u128f {
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float32x4_t v;
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float f[4];
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};
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union u128d {
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float64x2_t v;
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double f[4];
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};
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struct Vsplat{
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//Complex float
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inline float32x4_t operator()(float a, float b){
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float tmp[4]={a,b,a,b};
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return vld1q_f32(tmp);
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}
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// Real float
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inline float32x4_t operator()(float a){
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return vld1q_dup_f32(&a);
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}
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//Complex double
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inline float32x4_t operator()(double a, double b){
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float tmp[4]={(float)a,(float)b,(float)a,(float)b};
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return vld1q_f32(tmp);
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}
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//Real double
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inline float32x4_t operator()(double a){
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return vld1q_dup_f32(&a);
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}
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//Integer
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inline uint32x4_t operator()(Integer a){
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return vld1q_dup_u32(&a);
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}
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};
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struct Vstore{
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//Float
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inline void operator()(float32x4_t a, float* F){
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vst1q_f32(F, a);
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}
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//Double
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inline void operator()(float32x4_t a, double* D){
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vst1q_f32((float*)D, a);
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}
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//Integer
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inline void operator()(uint32x4_t a, Integer* I){
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vst1q_u32(I, a);
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}
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};
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struct Vstream{
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//Float
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inline void operator()(float * a, float32x4_t b){
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}
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//Double
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inline void operator()(double * a, float32x4_t b){
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}
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};
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struct Vset{
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// Complex float
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inline float32x4_t operator()(Grid::ComplexF *a){
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float32x4_t foo;
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return foo;
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}
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// Complex double
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inline float32x4_t operator()(Grid::ComplexD *a){
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float32x4_t foo;
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return foo;
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}
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// Real float
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inline float32x4_t operator()(float *a){
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float32x4_t foo;
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return foo;
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}
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// Real double
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inline float32x4_t operator()(double *a){
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float32x4_t foo;
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return foo;
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}
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// Integer
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inline uint32x4_t operator()(Integer *a){
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uint32x4_t foo;
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return foo;
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}
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};
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template <typename Out_type, typename In_type>
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struct Reduce{
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//Need templated class to overload output type
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//General form must generate error if compiled
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inline Out_type operator()(In_type in){
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printf("Error, using wrong Reduce function\n");
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exit(1);
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return 0;
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}
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};
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/////////////////////////////////////////////////////
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// Arithmetic operations
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/////////////////////////////////////////////////////
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struct Sum{
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//Complex/Real float
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inline float32x4_t operator()(float32x4_t a, float32x4_t b){
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return vaddq_f32(a,b);
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}
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//Complex/Real double
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inline float64x2_t operator()(float64x2_t a, float64x2_t b){
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return vaddq_f64(a,b);
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}
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//Integer
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inline uint32x4_t operator()(uint32x4_t a, uint32x4_t b){
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return vaddq_u32(a,b);
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}
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};
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struct Sub{
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//Complex/Real float
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inline float32x4_t operator()(float32x4_t a, float32x4_t b){
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return vsubq_f32(a,b);
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}
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//Complex/Real double
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inline float64x2_t operator()(float64x2_t a, float64x2_t b){
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return vsubq_f64(a,b);
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}
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//Integer
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inline uint32x4_t operator()(uint32x4_t a, uint32x4_t b){
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return vsubq_u32(a,b);
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}
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};
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struct MultComplex{
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// Complex float
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inline float32x4_t operator()(float32x4_t a, float32x4_t b){
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float32x4_t foo;
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return foo;
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}
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// Complex double
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inline float64x2_t operator()(float64x2_t a, float64x2_t b){
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float32x4_t foo;
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return foo;
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}
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};
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struct Mult{
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// Real float
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inline float32x4_t mac(float32x4_t a, float32x4_t b, float32x4_t c){
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return vaddq_f32(vmulq_f32(b,c),a);
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}
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inline float64x2_t mac(float64x2_t a, float64x2_t b, float64x2_t c){
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return vaddq_f64(vmulq_f64(b,c),a);
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}
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inline float32x4_t operator()(float32x4_t a, float32x4_t b){
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return vmulq_f32(a,b);
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}
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// Real double
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inline float64x2_t operator()(float64x2_t a, float64x2_t b){
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return vmulq_f64(a,b);
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}
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// Integer
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inline uint32x4_t operator()(uint32x4_t a, uint32x4_t b){
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return vmulq_u32(a,b);
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}
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};
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struct Conj{
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// Complex single
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inline float32x4_t operator()(float32x4_t in){
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return in;
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}
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// Complex double
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//inline float32x4_t operator()(float32x4_t in){
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// return 0;
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//}
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// do not define for integer input
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};
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struct TimesMinusI{
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//Complex single
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inline float32x4_t operator()(float32x4_t in, float32x4_t ret){
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return in;
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}
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//Complex double
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//inline float32x4_t operator()(float32x4_t in, float32x4_t ret){
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// return in;
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//}
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};
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struct TimesI{
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//Complex single
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inline float32x4_t operator()(float32x4_t in, float32x4_t ret){
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//need shuffle
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return in;
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}
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//Complex double
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//inline float32x4_t operator()(float32x4_t in, float32x4_t ret){
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// return 0;
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//}
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};
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//////////////////////////////////////////////
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// Some Template specialization
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template < typename vtype >
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void permute(vtype &a, vtype b, int perm) {
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};
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//Complex float Reduce
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template<>
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inline Grid::ComplexF Reduce<Grid::ComplexF, float32x4_t>::operator()(float32x4_t in){
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return 0;
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}
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//Real float Reduce
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template<>
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inline Grid::RealF Reduce<Grid::RealF, float32x4_t>::operator()(float32x4_t in){
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float32x2_t high = vget_high_f32(in);
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float32x2_t low = vget_low_f32(in);
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float32x2_t tmp = vadd_f32(low, high);
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float32x2_t sum = vpadd_f32(tmp, tmp);
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return vget_lane_f32(sum,0);
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}
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//Complex double Reduce
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template<>
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inline Grid::ComplexD Reduce<Grid::ComplexD, float64x2_t>::operator()(float64x2_t in){
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return 0;
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}
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//Real double Reduce
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template<>
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inline Grid::RealD Reduce<Grid::RealD, float64x2_t>::operator()(float64x2_t in){
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float64x2_t sum = vpaddq_f64(in, in);
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return vgetq_lane_f64(sum,0);
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}
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//Integer Reduce
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template<>
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inline Integer Reduce<Integer, uint32x4_t>::operator()(uint32x4_t in){
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// FIXME unimplemented
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printf("Reduce : Missing integer implementation -> FIX\n");
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assert(0);
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}
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}
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//////////////////////////////////////////////////////////////////////////////////////
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// Here assign types
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namespace Grid {
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typedef float32x4_t SIMD_Ftype; // Single precision type
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typedef float64x2_t SIMD_Dtype; // Double precision type
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typedef uint32x4_t SIMD_Itype; // Integer type
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inline void v_prefetch0(int size, const char *ptr){}; // prefetch utilities
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inline void prefetch_HINT_T0(const char *ptr){};
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// Gpermute function
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template < typename VectorSIMD >
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inline void Gpermute(VectorSIMD &y,const VectorSIMD &b, int perm ) {
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Optimization::permute(y.v,b.v,perm);
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}
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// Function name aliases
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typedef Optimization::Vsplat VsplatSIMD;
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typedef Optimization::Vstore VstoreSIMD;
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typedef Optimization::Vset VsetSIMD;
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typedef Optimization::Vstream VstreamSIMD;
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template <typename S, typename T> using ReduceSIMD = Optimization::Reduce<S,T>;
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// Arithmetic operations
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typedef Optimization::Sum SumSIMD;
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typedef Optimization::Sub SubSIMD;
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typedef Optimization::Mult MultSIMD;
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typedef Optimization::MultComplex MultComplexSIMD;
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typedef Optimization::Conj ConjSIMD;
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typedef Optimization::TimesMinusI TimesMinusISIMD;
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typedef Optimization::TimesI TimesISIMD;
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}
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