mirror of
https://github.com/paboyle/Grid.git
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338 lines
8.7 KiB
C++
338 lines
8.7 KiB
C++
//----------------------------------------------------------------------
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/*! @file Grid_sse4.h
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@brief Optimization libraries for SSE4 instructions set
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Using intrinsics
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*/
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// Time-stamp: <2015-05-27 12:02:07 neo>
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//----------------------------------------------------------------------
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#include <pmmintrin.h>
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namespace Optimization {
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struct Vsplat{
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//Complex float
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inline __m128 operator()(float a, float b){
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return _mm_set_ps(b,a,b,a);
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}
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// Real float
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inline __m128 operator()(float a){
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return _mm_set_ps(a,a,a,a);
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}
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//Complex double
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inline __m128d operator()(double a, double b){
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return _mm_set_pd(b,a);
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}
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//Real double
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inline __m128d operator()(double a){
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return _mm_set_pd(a,a);
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}
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//Integer
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inline __m128i operator()(Integer a){
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return _mm_set1_epi32(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()(__m128 a, float* F){
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_mm_store_ps(F,a);
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}
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//Double
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inline void operator()(__m128d a, double* D){
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_mm_store_pd(D,a);
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}
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//Integer
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inline void operator()(__m128i a, Integer* I){
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_mm_store_si128((__m128i *)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, __m128 b){
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_mm_stream_ps(a,b);
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}
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//Double
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inline void operator()(double * a, __m128d b){
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_mm_stream_pd(a,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 __m128 operator()(Grid::ComplexF *a){
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return _mm_set_ps(a[1].imag(), a[1].real(),a[0].imag(),a[0].real());
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}
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// Complex double
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inline __m128d operator()(Grid::ComplexD *a){
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return _mm_set_pd(a[0].imag(),a[0].real());
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}
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// Real float
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inline __m128 operator()(float *a){
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return _mm_set_ps(a[3],a[2],a[1],a[0]);
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}
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// Real double
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inline __m128d operator()(double *a){
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return _mm_set_pd(a[1],a[0]);
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}
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// Integer
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inline __m128i operator()(Integer *a){
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return _mm_set_epi32(a[0],a[1],a[2],a[3]);
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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 __m128 operator()(__m128 a, __m128 b){
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return _mm_add_ps(a,b);
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}
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//Complex/Real double
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inline __m128d operator()(__m128d a, __m128d b){
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return _mm_add_pd(a,b);
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}
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//Integer
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inline __m128i operator()(__m128i a, __m128i b){
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return _mm_add_epi32(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 __m128 operator()(__m128 a, __m128 b){
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return _mm_sub_ps(a,b);
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}
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//Complex/Real double
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inline __m128d operator()(__m128d a, __m128d b){
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return _mm_sub_pd(a,b);
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}
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//Integer
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inline __m128i operator()(__m128i a, __m128i b){
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return _mm_sub_epi32(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 __m128 operator()(__m128 a, __m128 b){
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__m128 ymm0,ymm1,ymm2;
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ymm0 = _mm_shuffle_ps(a,a,_MM_SHUFFLE(2,2,0,0)); // ymm0 <- ar ar,
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ymm0 = _mm_mul_ps(ymm0,b); // ymm0 <- ar bi, ar br
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ymm1 = _mm_shuffle_ps(b,b,_MM_SHUFFLE(2,3,0,1)); // ymm1 <- br,bi
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ymm2 = _mm_shuffle_ps(a,a,_MM_SHUFFLE(3,3,1,1)); // ymm2 <- ai,ai
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ymm1 = _mm_mul_ps(ymm1,ymm2); // ymm1 <- br ai, ai bi
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return _mm_addsub_ps(ymm0,ymm1);
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}
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// Complex double
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inline __m128d operator()(__m128d a, __m128d b){
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__m128d ymm0,ymm1,ymm2;
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ymm0 = _mm_shuffle_pd(a,a,0x0); // ymm0 <- ar ar,
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ymm0 = _mm_mul_pd(ymm0,b); // ymm0 <- ar bi, ar br
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ymm1 = _mm_shuffle_pd(b,b,0x1); // ymm1 <- br,bi b01
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ymm2 = _mm_shuffle_pd(a,a,0x3); // ymm2 <- ai,ai b11
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ymm1 = _mm_mul_pd(ymm1,ymm2); // ymm1 <- br ai, ai bi
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return _mm_addsub_pd(ymm0,ymm1);
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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 __m128 operator()(__m128 a, __m128 b){
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return _mm_mul_ps(a,b);
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}
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// Real double
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inline __m128d operator()(__m128d a, __m128d b){
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return _mm_mul_pd(a,b);
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}
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// Integer
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inline __m128i operator()(__m128i a, __m128i b){
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return _mm_mul_epi32(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 __m128 operator()(__m128 in){
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return _mm_xor_ps(_mm_addsub_ps(_mm_setzero_ps(),in), _mm_set1_ps(-0.f));
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}
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// Complex double
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inline __m128d operator()(__m128d in){
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return _mm_xor_pd(_mm_addsub_pd(_mm_setzero_pd(),in), _mm_set1_pd(-0.f));//untested
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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 __m128 operator()(__m128 in, __m128 ret){
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__m128 tmp =_mm_addsub_ps(_mm_setzero_ps(),in); // r,-i
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return _mm_shuffle_ps(tmp,tmp,_MM_SHUFFLE(2,3,0,1));
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}
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//Complex double
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inline __m128d operator()(__m128d in, __m128d ret){
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__m128d tmp =_mm_addsub_pd(_mm_setzero_pd(),in); // r,-i
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return _mm_shuffle_pd(tmp,tmp,0x1);
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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 __m128 operator()(__m128 in, __m128 ret){
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__m128 tmp =_mm_shuffle_ps(in,in,_MM_SHUFFLE(2,3,0,1));
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return _mm_addsub_ps(_mm_setzero_ps(),tmp); // r,-i
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}
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//Complex double
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inline __m128d operator()(__m128d in, __m128d ret){
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__m128d tmp = _mm_shuffle_pd(in,in,0x1);
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return _mm_addsub_pd(_mm_setzero_pd(),tmp); // r,-i
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}
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};
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//////////////////////////////////////////////
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// Some Template specialization
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//Complex float Reduce
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template<>
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inline Grid::ComplexF Reduce<Grid::ComplexF, __m128>::operator()(__m128 in){
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union {
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__m128 v1;
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float f[4];
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} u128;
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u128.v1 = _mm_add_ps(in, _mm_shuffle_ps(in,in, 0b01001110)); // FIXME Prefer to use _MM_SHUFFLE macros
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return Grid::ComplexF(u128.f[0], u128.f[1]);
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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, __m128>::operator()(__m128 in){
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// FIXME Hack
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const Grid::RealF * ptr = (const Grid::RealF *) ∈
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Grid::RealF ret = 0;
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for(int i=0;i< 4 ;i++){ // 4 number of simd lanes for float
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ret = ret+ptr[i];
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}
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return ret;
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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, __m128d>::operator()(__m128d in){
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printf("Reduce : Missing good complex double implementation -> FIX\n");
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return Grid::ComplexD(in[0], in[1]); // inefficient
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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, __m128d>::operator()(__m128d in){
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// FIXME Hack
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const Grid::RealD * ptr =(const Grid::RealD *) ∈
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Grid::RealD ret = 0;
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for(int i=0;i< 2 ;i++){// 2 number of simd lanes for float
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ret = ret+ptr[i];
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}
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return ret;
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}
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//Integer Reduce
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template<>
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inline Integer Reduce<Integer, __m128i>::operator()(__m128i 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 __m128 SIMD_Ftype; // Single precision type
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typedef __m128d SIMD_Dtype; // Double precision type
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typedef __m128i SIMD_Itype; // Integer type
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inline void v_prefetch0(int size, const char *ptr){}; // prefetch utilities
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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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union {
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__m128 f;
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decltype(VectorSIMD::v) v;
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} conv;
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conv.v = b.v;
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switch(perm){
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case 3: break; //empty for SSE4
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case 2: break; //empty for SSE4
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case 1: conv.f = _mm_shuffle_ps(conv.f,conv.f,_MM_SHUFFLE(2,3,0,1)); break;
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case 0: conv.f = _mm_shuffle_ps(conv.f,conv.f,_MM_SHUFFLE(1,0,3,2)); break;
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default: assert(0); break;
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}
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y.v=conv.v;
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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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