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Grid/lib/simd/Grid_imci.h
Antonin Portelli 97cddda49e Merge branch 'feature/gen-simd' into feature/doxygen 
# Conflicts:
#	Makefile.am
#	configure.ac
2016-11-19 13:11:13 +01:00

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./lib/simd/Grid_imci.h
Copyright (C) 2015
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: paboyle <paboyle@ph.ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#include <immintrin.h>
#include <zmmintrin.h>
namespace Grid{
namespace Optimization {
struct Vsplat{
//Complex float
inline __m512 operator()(float a, float b){
return _mm512_set_ps(b,a,b,a,b,a,b,a,b,a,b,a,b,a,b,a);
}
// Real float
inline __m512 operator()(float a){
return _mm512_set1_ps(a);
}
//Complex double
inline __m512d operator()(double a, double b){
return _mm512_set_pd(b,a,b,a,b,a,b,a);
}
//Real double
inline __m512d operator()(double a){
return _mm512_set1_pd(a);
}
//Integer
inline __m512i operator()(Integer a){
return _mm512_set1_epi32(a);
}
};
struct Vstore{
//Float
inline void operator()(__m512 a, float* F){
_mm512_store_ps(F,a);
}
//Double
inline void operator()(__m512d a, double* D){
_mm512_store_pd(D,a);
}
//Integer
inline void operator()(__m512i a, Integer* I){
_mm512_store_si512((__m512i *)I,a);
}
};
struct Vstream{
//Float
inline void operator()(float * a, __m512 b){
_mm512_storenrngo_ps(a,b);
}
//Double
inline void operator()(double * a, __m512d b){
_mm512_storenrngo_pd(a,b);
}
};
struct Vset{
// Complex float
inline __m512 operator()(Grid::ComplexF *a){
return _mm512_set_ps(a[7].imag(),a[7].real(),a[6].imag(),a[6].real(),
a[5].imag(),a[5].real(),a[4].imag(),a[4].real(),
a[3].imag(),a[3].real(),a[2].imag(),a[2].real(),
a[1].imag(),a[1].real(),a[0].imag(),a[0].real());
}
// Complex double
inline __m512d operator()(Grid::ComplexD *a){
return _mm512_set_pd(a[3].imag(),a[3].real(),a[2].imag(),a[2].real(),
a[1].imag(),a[1].real(),a[0].imag(),a[0].real());
}
// Real float
inline __m512 operator()(float *a){
return _mm512_set_ps( a[15],a[14],a[13],a[12],a[11],a[10],a[9],a[8],
a[7],a[6],a[5],a[4],a[3],a[2],a[1],a[0]);
}
// Real double
inline __m512d operator()(double *a){
return _mm512_set_pd(a[7],a[6],a[5],a[4],a[3],a[2],a[1],a[0]);
}
// Integer
inline __m512i operator()(Integer *a){
return _mm512_set_epi32( a[15],a[14],a[13],a[12],a[11],a[10],a[9],a[8],
a[7],a[6],a[5],a[4],a[3],a[2],a[1],a[0]);
}
};
template <typename Out_type, typename In_type>
struct Reduce{
//Need templated class to overload output type
//General form must generate error if compiled
inline Out_type operator()(In_type in){
printf("Error, using wrong Reduce function\n");
exit(1);
return 0;
}
};
/////////////////////////////////////////////////////
// Arithmetic operations
/////////////////////////////////////////////////////
struct Sum{
//Complex/Real float
inline __m512 operator()(__m512 a, __m512 b){
return _mm512_add_ps(a,b);
}
//Complex/Real double
inline __m512d operator()(__m512d a, __m512d b){
return _mm512_add_pd(a,b);
}
//Integer
inline __m512i operator()(__m512i a, __m512i b){
return _mm512_add_epi32(a,b);
}
};
struct Sub{
//Complex/Real float
inline __m512 operator()(__m512 a, __m512 b){
return _mm512_sub_ps(a,b);
}
//Complex/Real double
inline __m512d operator()(__m512d a, __m512d b){
return _mm512_sub_pd(a,b);
}
//Integer
inline __m512i operator()(__m512i a, __m512i b){
return _mm512_sub_epi32(a,b);
}
};
struct MultComplex{
// Complex float
inline __m512 operator()(__m512 a, __m512 b){
__m512 vzero,ymm0,ymm1,real, imag;
vzero = _mm512_setzero_ps();
ymm0 = _mm512_swizzle_ps(a, _MM_SWIZ_REG_CDAB); //
real = (__m512)_mm512_mask_or_epi32((__m512i)a, 0xAAAA,(__m512i)vzero,(__m512i)ymm0);
imag = _mm512_mask_sub_ps(a, 0x5555,vzero, ymm0);
ymm1 = _mm512_mul_ps(real, b);
ymm0 = _mm512_swizzle_ps(b, _MM_SWIZ_REG_CDAB); // OK
return _mm512_fmadd_ps(ymm0,imag,ymm1);
}
// Complex double
inline __m512d operator()(__m512d a, __m512d b){
/* This is from
* Automatic SIMD Vectorization of Fast Fourier Transforms for the Larrabee and AVX Instruction Sets
* @inproceedings{McFarlin:2011:ASV:1995896.1995938,
* author = {McFarlin, Daniel S. and Arbatov, Volodymyr and Franchetti, Franz and P\"{u}schel, Markus},
* title = {Automatic SIMD Vectorization of Fast Fourier Transforms for the Larrabee and AVX Instruction Sets},
* booktitle = {Proceedings of the International Conference on Supercomputing},
* series = {ICS '11},
* year = {2011},
* isbn = {978-1-4503-0102-2},
* location = {Tucson, Arizona, USA},
* pages = {265--274},
* numpages = {10},
* url = {http://doi.acm.org/10.1145/1995896.1995938},
* doi = {10.1145/1995896.1995938},
* acmid = {1995938},
* publisher = {ACM},
* address = {New York, NY, USA},
* keywords = {autovectorization, fourier transform, program generation, simd, super-optimization},
* }
*/
__m512d vzero,ymm0,ymm1,real,imag;
vzero =_mm512_setzero_pd();
ymm0 = _mm512_swizzle_pd(a, _MM_SWIZ_REG_CDAB); //
real =(__m512d)_mm512_mask_or_epi64((__m512i)a, 0xAA,(__m512i)vzero,(__m512i) ymm0);
imag = _mm512_mask_sub_pd(a, 0x55,vzero, ymm0);
ymm1 = _mm512_mul_pd(real, b);
ymm0 = _mm512_swizzle_pd(b, _MM_SWIZ_REG_CDAB); // OK
return _mm512_fmadd_pd(ymm0,imag,ymm1);
}
};
struct Mult{
inline void mac(__m512 &a, __m512 b, __m512 c){
a= _mm512_fmadd_ps( b, c, a);
}
inline void mac(__m512d &a, __m512d b, __m512d c){
a= _mm512_fmadd_pd( b, c, a);
}
// Real float
inline __m512 operator()(__m512 a, __m512 b){
return _mm512_mul_ps(a,b);
}
// Real double
inline __m512d operator()(__m512d a, __m512d b){
return _mm512_mul_pd(a,b);
}
// Integer
inline __m512i operator()(__m512i a, __m512i b){
return _mm512_mullo_epi32(a,b);
}
};
struct Div{
// Real float
inline __m512 operator()(__m512 a, __m512 b){
return _mm512_div_ps(a,b);
}
// Real double
inline __m512d operator()(__m512d a, __m512d b){
return _mm512_div_pd(a,b);
}
};
struct Conj{
// Complex single
inline __m512 operator()(__m512 in){
return _mm512_mask_sub_ps(in,0xaaaa,_mm512_setzero_ps(),in); // Zero out 0+real 0-imag
}
// Complex double
inline __m512d operator()(__m512d in){
return _mm512_mask_sub_pd(in, 0xaa,_mm512_setzero_pd(), in);
}
// do not define for integer input
};
struct TimesMinusI{
//Complex single
inline __m512 operator()(__m512 in, __m512 ret){
__m512 tmp = _mm512_mask_sub_ps(in,0xaaaa,_mm512_setzero_ps(),in); // real -imag
return _mm512_swizzle_ps(tmp, _MM_SWIZ_REG_CDAB);// OK
}
//Complex double
inline __m512d operator()(__m512d in, __m512d ret){
__m512d tmp = _mm512_mask_sub_pd(in,0xaa,_mm512_setzero_pd(),in); // real -imag
return _mm512_swizzle_pd(tmp, _MM_SWIZ_REG_CDAB);// OK
}
};
struct TimesI{
//Complex single
inline __m512 operator()(__m512 in, __m512 ret){
__m512 tmp = _mm512_swizzle_ps(in, _MM_SWIZ_REG_CDAB);// OK
return _mm512_mask_sub_ps(tmp,0xaaaa,_mm512_setzero_ps(),tmp); // real -imag
}
//Complex double
inline __m512d operator()(__m512d in, __m512d ret){
__m512d tmp = _mm512_swizzle_pd(in, _MM_SWIZ_REG_CDAB);// OK
return _mm512_mask_sub_pd(tmp,0xaa,_mm512_setzero_pd(),tmp); // real -imag
}
};
struct Permute{
static inline __m512 Permute0(__m512 in){
return _mm512_permute4f128_ps(in,(_MM_PERM_ENUM)_MM_SELECT_FOUR_FOUR(1,0,3,2));
};
static inline __m512 Permute1(__m512 in){
return _mm512_permute4f128_ps(in,(_MM_PERM_ENUM)_MM_SELECT_FOUR_FOUR(2,3,0,1));
};
static inline __m512 Permute2(__m512 in){
return _mm512_swizzle_ps(in,_MM_SWIZ_REG_BADC);
};
static inline __m512 Permute3(__m512 in){
return _mm512_swizzle_ps(in,_MM_SWIZ_REG_CDAB);
};
static inline __m512d Permute0(__m512d in){// Hack no intrinsic for 256 swaps of __m512d
return (__m512d)_mm512_permute4f128_ps((__m512)in,(_MM_PERM_ENUM)_MM_SELECT_FOUR_FOUR(1,0,3,2));
};
static inline __m512d Permute1(__m512d in){
return _mm512_swizzle_pd(in,_MM_SWIZ_REG_BADC);
};
static inline __m512d Permute2(__m512d in){
return _mm512_swizzle_pd(in,_MM_SWIZ_REG_CDAB);
};
static inline __m512d Permute3(__m512d in){
return in;
};
};
struct Rotate{
static inline __m512 rotate(__m512 in,int n){
switch(n){
case 0: return tRotate<0>(in);break;
case 1: return tRotate<1>(in);break;
case 2: return tRotate<2>(in);break;
case 3: return tRotate<3>(in);break;
case 4: return tRotate<4>(in);break;
case 5: return tRotate<5>(in);break;
case 6: return tRotate<6>(in);break;
case 7: return tRotate<7>(in);break;
case 8 : return tRotate<8>(in);break;
case 9 : return tRotate<9>(in);break;
case 10: return tRotate<10>(in);break;
case 11: return tRotate<11>(in);break;
case 12: return tRotate<12>(in);break;
case 13: return tRotate<13>(in);break;
case 14: return tRotate<14>(in);break;
case 15: return tRotate<15>(in);break;
default: assert(0);
}
}
static inline __m512d rotate(__m512d in,int n){
switch(n){
case 0: return tRotate<0>(in);break;
case 1: return tRotate<1>(in);break;
case 2: return tRotate<2>(in);break;
case 3: return tRotate<3>(in);break;
case 4: return tRotate<4>(in);break;
case 5: return tRotate<5>(in);break;
case 6: return tRotate<6>(in);break;
case 7: return tRotate<7>(in);break;
default: assert(0);
}
}
template<int n> static inline __m512 tRotate(__m512 in){
return (__m512)_mm512_alignr_epi32((__m512i)in,(__m512i)in,n);
};
template<int n> static inline __m512d tRotate(__m512d in){
return (__m512d)_mm512_alignr_epi32((__m512i)in,(__m512i)in,2*n);
};
};
//////////////////////////////////////////////
// Some Template specialization
//Complex float Reduce
template<>
inline Grid::ComplexF Reduce<Grid::ComplexF, __m512>::operator()(__m512 in){
return Grid::ComplexF(_mm512_mask_reduce_add_ps(0x5555, in),_mm512_mask_reduce_add_ps(0xAAAA, in));
}
//Real float Reduce
template<>
inline Grid::RealF Reduce<Grid::RealF, __m512>::operator()(__m512 in){
return _mm512_reduce_add_ps(in);
}
//Complex double Reduce
template<>
inline Grid::ComplexD Reduce<Grid::ComplexD, __m512d>::operator()(__m512d in){
return Grid::ComplexD(_mm512_mask_reduce_add_pd(0x55, in),_mm512_mask_reduce_add_pd(0xAA, in));
}
//Real double Reduce
template<>
inline Grid::RealD Reduce<Grid::RealD, __m512d>::operator()(__m512d in){
return _mm512_reduce_add_pd(in);
}
//Integer Reduce
template<>
inline Integer Reduce<Integer, __m512i>::operator()(__m512i in){
// FIXME unimplemented
printf("Reduce : Missing integer implementation -> FIX\n");
assert(0);
}
}
//////////////////////////////////////////////////////////////////////////////////////
// Here assign types
typedef __m512 SIMD_Ftype; // Single precision type
typedef __m512d SIMD_Dtype; // Double precision type
typedef __m512i SIMD_Itype; // Integer type
// prefecth
inline void v_prefetch0(int size, const char *ptr){
for(int i=0;i<size;i+=64){ // Define L1 linesize above
_mm_prefetch(ptr+i+4096,_MM_HINT_T1);
_mm_prefetch(ptr+i+512,_MM_HINT_T0);
}
}
inline void prefetch_HINT_T0(const char *ptr){
_mm_prefetch(ptr,_MM_HINT_T0);
}
// Function name aliases
typedef Optimization::Vsplat VsplatSIMD;
typedef Optimization::Vstore VstoreSIMD;
typedef Optimization::Vset VsetSIMD;
typedef Optimization::Vstream VstreamSIMD;
template <typename S, typename T> using ReduceSIMD = Optimization::Reduce<S,T>;
// Arithmetic operations
typedef Optimization::Sum SumSIMD;
typedef Optimization::Sub SubSIMD;
typedef Optimization::Div DivSIMD;
typedef Optimization::Mult MultSIMD;
typedef Optimization::MultComplex MultComplexSIMD;
typedef Optimization::Conj ConjSIMD;
typedef Optimization::TimesMinusI TimesMinusISIMD;
typedef Optimization::TimesI TimesISIMD;
}
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