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836e929565
Grid/lib/simd/Grid_sse4.h
paboyle 836e929565 Divide handling improved
2016-09-26 09:42:22 +01:00

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./lib/simd/Grid_sse4.h
Copyright (C) 2015
Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: neo <cossu@post.kek.jp>
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 */
//----------------------------------------------------------------------
/*! @file Grid_sse4.h
@brief Optimization libraries for SSE4 instructions set
Using intrinsics
*/
// Time-stamp: <2015-06-16 23:27:54 neo>
//----------------------------------------------------------------------
#include <pmmintrin.h>
namespace Grid {
namespace Optimization {
template<class vtype>
union uconv {
__m128 f;
vtype v;
};
union u128f {
__m128 v;
float f[4];
};
union u128d {
__m128d v;
double f[2];
};
struct Vsplat{
//Complex float
inline __m128 operator()(float a, float b){
return _mm_set_ps(b,a,b,a);
}
// Real float
inline __m128 operator()(float a){
return _mm_set_ps(a,a,a,a);
}
//Complex double
inline __m128d operator()(double a, double b){
return _mm_set_pd(b,a);
}
//Real double
inline __m128d operator()(double a){
return _mm_set_pd(a,a);
}
//Integer
inline __m128i operator()(Integer a){
return _mm_set1_epi32(a);
}
};
struct Vstore{
//Float
inline void operator()(__m128 a, float* F){
_mm_store_ps(F,a);
}
//Double
inline void operator()(__m128d a, double* D){
_mm_store_pd(D,a);
}
//Integer
inline void operator()(__m128i a, Integer* I){
_mm_store_si128((__m128i *)I,a);
}
};
struct Vstream{
//Float
inline void operator()(float * a, __m128 b){
_mm_stream_ps(a,b);
}
//Double
inline void operator()(double * a, __m128d b){
_mm_stream_pd(a,b);
}
};
struct Vset{
// Complex float
inline __m128 operator()(Grid::ComplexF *a){
return _mm_set_ps(a[1].imag(), a[1].real(),a[0].imag(),a[0].real());
}
// Complex double
inline __m128d operator()(Grid::ComplexD *a){
return _mm_set_pd(a[0].imag(),a[0].real());
}
// Real float
inline __m128 operator()(float *a){
return _mm_set_ps(a[3],a[2],a[1],a[0]);
}
// Real double
inline __m128d operator()(double *a){
return _mm_set_pd(a[1],a[0]);
}
// Integer
inline __m128i operator()(Integer *a){
return _mm_set_epi32(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 __m128 operator()(__m128 a, __m128 b){
return _mm_add_ps(a,b);
}
//Complex/Real double
inline __m128d operator()(__m128d a, __m128d b){
return _mm_add_pd(a,b);
}
//Integer
inline __m128i operator()(__m128i a, __m128i b){
return _mm_add_epi32(a,b);
}
};
struct Sub{
//Complex/Real float
inline __m128 operator()(__m128 a, __m128 b){
return _mm_sub_ps(a,b);
}
//Complex/Real double
inline __m128d operator()(__m128d a, __m128d b){
return _mm_sub_pd(a,b);
}
//Integer
inline __m128i operator()(__m128i a, __m128i b){
return _mm_sub_epi32(a,b);
}
};
struct MultComplex{
// Complex float
inline __m128 operator()(__m128 a, __m128 b){
__m128 ymm0,ymm1,ymm2;
ymm0 = _mm_shuffle_ps(a,a,_MM_SELECT_FOUR_FOUR(2,2,0,0)); // ymm0 <- ar ar,
ymm0 = _mm_mul_ps(ymm0,b); // ymm0 <- ar bi, ar br
ymm1 = _mm_shuffle_ps(b,b,_MM_SELECT_FOUR_FOUR(2,3,0,1)); // ymm1 <- br,bi
ymm2 = _mm_shuffle_ps(a,a,_MM_SELECT_FOUR_FOUR(3,3,1,1)); // ymm2 <- ai,ai
ymm1 = _mm_mul_ps(ymm1,ymm2); // ymm1 <- br ai, ai bi
return _mm_addsub_ps(ymm0,ymm1);
}
// Complex double
inline __m128d operator()(__m128d a, __m128d b){
__m128d ymm0,ymm1,ymm2;
ymm0 = _mm_shuffle_pd(a,a,0x0); // ymm0 <- ar ar,
ymm0 = _mm_mul_pd(ymm0,b); // ymm0 <- ar bi, ar br
ymm1 = _mm_shuffle_pd(b,b,0x1); // ymm1 <- br,bi b01
ymm2 = _mm_shuffle_pd(a,a,0x3); // ymm2 <- ai,ai b11
ymm1 = _mm_mul_pd(ymm1,ymm2); // ymm1 <- br ai, ai bi
return _mm_addsub_pd(ymm0,ymm1);
}
};
struct Mult{
inline void mac(__m128 &a, __m128 b, __m128 c){
a= _mm_add_ps(_mm_mul_ps(b,c),a);
}
inline void mac(__m128d &a, __m128d b, __m128d c){
a= _mm_add_pd(_mm_mul_pd(b,c),a);
}
// Real float
inline __m128 operator()(__m128 a, __m128 b){
return _mm_mul_ps(a,b);
}
// Real double
inline __m128d operator()(__m128d a, __m128d b){
return _mm_mul_pd(a,b);
}
// Integer
inline __m128i operator()(__m128i a, __m128i b){
return _mm_mullo_epi32(a,b);
}
};
struct Div{
// Real float
inline __m128 operator()(__m128 a, __m128 b){
return _mm_div_ps(a,b);
}
// Real double
inline __m128d operator()(__m128d a, __m128d b){
return _mm_div_pd(a,b);
}
};
struct Conj{
// Complex single
inline __m128 operator()(__m128 in){
return _mm_xor_ps(_mm_addsub_ps(_mm_setzero_ps(),in), _mm_set1_ps(-0.f));
}
// Complex double
inline __m128d operator()(__m128d in){
return _mm_xor_pd(_mm_addsub_pd(_mm_setzero_pd(),in), _mm_set1_pd(-0.f));//untested
}
// do not define for integer input
};
struct TimesMinusI{
//Complex single
inline __m128 operator()(__m128 in, __m128 ret){
__m128 tmp =_mm_addsub_ps(_mm_setzero_ps(),in); // r,-i
return _mm_shuffle_ps(tmp,tmp,_MM_SELECT_FOUR_FOUR(2,3,0,1));
}
//Complex double
inline __m128d operator()(__m128d in, __m128d ret){
__m128d tmp =_mm_addsub_pd(_mm_setzero_pd(),in); // r,-i
return _mm_shuffle_pd(tmp,tmp,0x1);
}
};
struct TimesI{
//Complex single
inline __m128 operator()(__m128 in, __m128 ret){
__m128 tmp =_mm_shuffle_ps(in,in,_MM_SELECT_FOUR_FOUR(2,3,0,1));
return _mm_addsub_ps(_mm_setzero_ps(),tmp); // r,-i
}
//Complex double
inline __m128d operator()(__m128d in, __m128d ret){
__m128d tmp = _mm_shuffle_pd(in,in,0x1);
return _mm_addsub_pd(_mm_setzero_pd(),tmp); // r,-i
}
};
struct Permute{
static inline __m128 Permute0(__m128 in){
return _mm_shuffle_ps(in,in,_MM_SELECT_FOUR_FOUR(1,0,3,2)); //AB CD -> CD AB
};
static inline __m128 Permute1(__m128 in){
return _mm_shuffle_ps(in,in,_MM_SELECT_FOUR_FOUR(2,3,0,1)); //AB CD -> BA DC
};
static inline __m128 Permute2(__m128 in){
return in;
};
static inline __m128 Permute3(__m128 in){
return in;
};
static inline __m128d Permute0(__m128d in){ //AB -> BA
return _mm_shuffle_pd(in,in,0x1);
};
static inline __m128d Permute1(__m128d in){
return in;
};
static inline __m128d Permute2(__m128d in){
return in;
};
static inline __m128d Permute3(__m128d in){
return in;
};
};
struct Rotate{
static inline __m128 rotate(__m128 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;
default: assert(0);
}
}
static inline __m128d rotate(__m128d in,int n){
switch(n){
case 0: return tRotate<0>(in);break;
case 1: return tRotate<1>(in);break;
default: assert(0);
}
}
#define _mm_alignr_epi32(a,b,n) _mm_alignr_epi8(a,b,(n*4)%16)
#define _mm_alignr_epi64(a,b,n) _mm_alignr_epi8(a,b,(n*8)%16)
template<int n> static inline __m128 tRotate(__m128 in){ return (__m128)_mm_alignr_epi32((__m128i)in,(__m128i)in,n); };
template<int n> static inline __m128d tRotate(__m128d in){ return (__m128d)_mm_alignr_epi64((__m128i)in,(__m128i)in,n); };
};
//////////////////////////////////////////////
// Some Template specialization
//Complex float Reduce
template<>
inline Grid::ComplexF Reduce<Grid::ComplexF, __m128>::operator()(__m128 in){
__m128 v1; // two complex
v1= Optimization::Permute::Permute0(in);
v1= _mm_add_ps(v1,in);
u128f conv; conv.v=v1;
return Grid::ComplexF(conv.f[0],conv.f[1]);
}
//Real float Reduce
template<>
inline Grid::RealF Reduce<Grid::RealF, __m128>::operator()(__m128 in){
__m128 v1,v2; // quad single
v1= Optimization::Permute::Permute0(in);
v1= _mm_add_ps(v1,in);
v2= Optimization::Permute::Permute1(v1);
v1 = _mm_add_ps(v1,v2);
u128f conv; conv.v=v1;
return conv.f[0];
}
//Complex double Reduce
template<>
inline Grid::ComplexD Reduce<Grid::ComplexD, __m128d>::operator()(__m128d in){
u128d conv; conv.v = in;
return Grid::ComplexD(conv.f[0],conv.f[1]);
}
//Real double Reduce
template<>
inline Grid::RealD Reduce<Grid::RealD, __m128d>::operator()(__m128d in){
__m128d v1;
v1 = Optimization::Permute::Permute0(in);
v1 = _mm_add_pd(v1,in);
u128d conv; conv.v = v1;
return conv.f[0];
}
//Integer Reduce
template<>
inline Integer Reduce<Integer, __m128i>::operator()(__m128i in){
// FIXME unimplemented
printf("Reduce : Missing integer implementation -> FIX\n");
assert(0);
}
}
//////////////////////////////////////////////////////////////////////////////////////
// Here assign types
typedef __m128 SIMD_Ftype; // Single precision type
typedef __m128d SIMD_Dtype; // Double precision type
typedef __m128i SIMD_Itype; // Integer type
// prefetch utilities
inline void v_prefetch0(int size, const char *ptr){};
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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