mirror of
https://github.com/paboyle/Grid.git
synced 2024-11-16 02:35:36 +00:00
531 lines
12 KiB
C++
531 lines
12 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/simd/Grid_generic.h
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Copyright (C) 2015
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Copyright (C) 2017
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Author: Antonin Portelli <antonin.portelli@me.com>
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Andrew Lawson <andrew.lawson1991@gmail.com>
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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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#include "Grid_generic_types.h"
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namespace Grid {
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namespace Optimization {
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struct Vsplat{
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// Complex
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template <typename T>
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inline vec<T> operator()(T a, T b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::r, 2)
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{
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out.v[i] = a;
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out.v[i+1] = b;
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}
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return out;
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}
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// Real
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template <typename T>
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inline vec<T> operator()(T a){
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vec<T> out;
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VECTOR_FOR(i, W<T>::r, 1)
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{
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out.v[i] = a;
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}
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return out;
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}
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};
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struct Vstore{
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// Real
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template <typename T>
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inline void operator()(vec<T> a, T *D){
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*((vec<T> *)D) = a;
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}
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};
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struct Vstream{
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// Real
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template <typename T>
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inline void operator()(T * a, vec<T> b){
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*((vec<T> *)a) = b;
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}
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};
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struct Vset{
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// Complex
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template <typename T>
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inline vec<T> operator()(std::complex<T> *a){
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vec<T> out;
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VECTOR_FOR(i, W<T>::c, 1)
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{
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out.v[2*i] = a[i].real();
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out.v[2*i+1] = a[i].imag();
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}
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return out;
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}
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// Real
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template <typename T>
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inline vec<T> operator()(T *a){
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vec<T> out;
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out = *((vec<T> *)a);
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return out;
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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
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::r, 1)
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{
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out.v[i] = a.v[i] + b.v[i];
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}
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return out;
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}
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};
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struct Sub{
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// Complex/Real
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::r, 1)
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{
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out.v[i] = a.v[i] - b.v[i];
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}
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return out;
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}
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};
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struct Mult{
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// Real
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::r, 1)
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{
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out.v[i] = a.v[i]*b.v[i];
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}
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return out;
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}
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};
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#define cmul(a, b, c, i)\
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c[i] = a[i]*b[i] - a[i+1]*b[i+1];\
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c[i+1] = a[i]*b[i+1] + a[i+1]*b[i];
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struct MultRealPart{
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::c, 1)
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{
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out.v[2*i] = a.v[2*i]*b.v[2*i];
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out.v[2*i+1] = a.v[2*i]*b.v[2*i+1];
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}
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return out;
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}
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};
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struct MaddRealPart{
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b, vec<T> c){
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vec<T> out;
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VECTOR_FOR(i, W<T>::c, 1)
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{
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out.v[2*i] = a.v[2*i]*b.v[2*i] + c.v[2*i];
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out.v[2*i+1] = a.v[2*i]*b.v[2*i+1] + c.v[2*i+1];
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}
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return out;
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}
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};
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struct MultComplex{
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// Complex
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::c, 1)
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{
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cmul(a.v, b.v, out.v, 2*i);
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}
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return out;
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}
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};
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#undef cmul
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struct Div{
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// Real
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::r, 1)
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{
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out.v[i] = a.v[i]/b.v[i];
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}
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return out;
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}
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};
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#define conj(a, b, i)\
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b[i] = a[i];\
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b[i+1] = -a[i+1];
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struct Conj{
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// Complex
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template <typename T>
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inline vec<T> operator()(vec<T> a){
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vec<T> out;
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VECTOR_FOR(i, W<T>::c, 1)
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{
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conj(a.v, out.v, 2*i);
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}
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return out;
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}
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};
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#undef conj
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#define timesmi(a, b, i)\
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b[i] = a[i+1];\
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b[i+1] = -a[i];
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struct TimesMinusI{
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// Complex
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::c, 1)
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{
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timesmi(a.v, out.v, 2*i);
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}
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return out;
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}
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};
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#undef timesmi
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#define timesi(a, b, i)\
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b[i] = -a[i+1];\
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b[i+1] = a[i];
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struct TimesI{
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// Complex
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template <typename T>
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inline vec<T> operator()(vec<T> a, vec<T> b){
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vec<T> out;
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VECTOR_FOR(i, W<T>::c, 1)
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{
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timesi(a.v, out.v, 2*i);
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}
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return out;
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}
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};
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#undef timesi
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struct PrecisionChange {
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static inline vech StoH (const vecf &a,const vecf &b) {
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vech ret;
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#ifdef USE_FP16
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vech *ha = (vech *)&a;
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vech *hb = (vech *)&b;
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const int nf = W<float>::r;
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// VECTOR_FOR(i, nf,1){ ret.v[i] = ( (uint16_t *) &a.v[i])[1] ; }
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// VECTOR_FOR(i, nf,1){ ret.v[i+nf] = ( (uint16_t *) &b.v[i])[1] ; }
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VECTOR_FOR(i, nf,1){ ret.v[i] = ha->v[2*i+1]; }
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VECTOR_FOR(i, nf,1){ ret.v[i+nf] = hb->v[2*i+1]; }
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#else
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assert(0);
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#endif
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return ret;
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}
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static inline void HtoS (vech h,vecf &sa,vecf &sb) {
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#ifdef USE_FP16
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const int nf = W<float>::r;
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const int nh = W<uint16_t>::r;
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vech *ha = (vech *)&sa;
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vech *hb = (vech *)&sb;
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VECTOR_FOR(i, nf, 1){ sb.v[i]= sa.v[i] = 0; }
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// VECTOR_FOR(i, nf, 1){ ( (uint16_t *) (&sa.v[i]))[1] = h.v[i];}
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// VECTOR_FOR(i, nf, 1){ ( (uint16_t *) (&sb.v[i]))[1] = h.v[i+nf];}
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VECTOR_FOR(i, nf, 1){ ha->v[2*i+1]=h.v[i]; }
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VECTOR_FOR(i, nf, 1){ hb->v[2*i+1]=h.v[i+nf]; }
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#else
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assert(0);
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#endif
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}
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static inline vecf DtoS (vecd a,vecd b) {
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const int nd = W<double>::r;
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const int nf = W<float>::r;
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vecf ret;
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VECTOR_FOR(i, nd,1){ ret.v[i] = a.v[i] ; }
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VECTOR_FOR(i, nd,1){ ret.v[i+nd] = b.v[i] ; }
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return ret;
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}
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static inline void StoD (vecf s,vecd &a,vecd &b) {
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const int nd = W<double>::r;
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VECTOR_FOR(i, nd,1){ a.v[i] = s.v[i] ; }
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VECTOR_FOR(i, nd,1){ b.v[i] = s.v[i+nd] ; }
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}
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static inline vech DtoH (vecd a,vecd b,vecd c,vecd d) {
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vecf sa,sb;
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sa = DtoS(a,b);
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sb = DtoS(c,d);
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return StoH(sa,sb);
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}
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static inline void HtoD (vech h,vecd &a,vecd &b,vecd &c,vecd &d) {
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vecf sa,sb;
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HtoS(h,sa,sb);
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StoD(sa,a,b);
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StoD(sb,c,d);
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}
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};
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//////////////////////////////////////////////
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// Exchange support
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struct Exchange{
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template <typename T,int n>
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static inline void ExchangeN(vec<T> &out1,vec<T> &out2,vec<T> &in1,vec<T> &in2){
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const int w = W<T>::r;
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unsigned int mask = w >> (n + 1);
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// std::cout << " Exchange "<<n<<" nsimd "<<w<<" mask 0x" <<std::hex<<mask<<std::dec<<std::endl;
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VECTOR_FOR(i, w, 1) {
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int j1 = i&(~mask);
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if ( (i&mask) == 0 ) { out1.v[i]=in1.v[j1];}
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else { out1.v[i]=in2.v[j1];}
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int j2 = i|mask;
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if ( (i&mask) == 0 ) { out2.v[i]=in1.v[j2];}
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else { out2.v[i]=in2.v[j2];}
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}
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}
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template <typename T>
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static inline void Exchange0(vec<T> &out1,vec<T> &out2,vec<T> &in1,vec<T> &in2){
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ExchangeN<T,0>(out1,out2,in1,in2);
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};
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template <typename T>
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static inline void Exchange1(vec<T> &out1,vec<T> &out2,vec<T> &in1,vec<T> &in2){
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ExchangeN<T,1>(out1,out2,in1,in2);
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};
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template <typename T>
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static inline void Exchange2(vec<T> &out1,vec<T> &out2,vec<T> &in1,vec<T> &in2){
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ExchangeN<T,2>(out1,out2,in1,in2);
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};
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template <typename T>
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static inline void Exchange3(vec<T> &out1,vec<T> &out2,vec<T> &in1,vec<T> &in2){
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ExchangeN<T,3>(out1,out2,in1,in2);
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};
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};
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//////////////////////////////////////////////
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// Some Template specialization
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#define perm(a, b, n, w)\
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unsigned int _mask = w >> (n + 1);\
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VECTOR_FOR(i, w, 1)\
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{\
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b[i] = a[i^_mask];\
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}
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#define DECL_PERMUTE_N(n)\
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template <typename T>\
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static inline vec<T> Permute##n(vec<T> in) {\
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vec<T> out;\
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perm(in.v, out.v, n, W<T>::r);\
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return out;\
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}
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struct Permute{
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DECL_PERMUTE_N(0);
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DECL_PERMUTE_N(1);
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DECL_PERMUTE_N(2);
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DECL_PERMUTE_N(3);
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};
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#undef perm
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#undef DECL_PERMUTE_N
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#define rot(a, b, n, w)\
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VECTOR_FOR(i, w, 1)\
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{\
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b[i] = a[(i + n)%w];\
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}
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struct Rotate{
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template <int n, typename T> static inline vec<T> tRotate(vec<T> in){
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return rotate(in, n);
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}
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template <typename T>
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static inline vec<T> rotate(vec<T> in, int n){
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vec<T> out;
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rot(in.v, out.v, n, W<T>::r);
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return out;
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}
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};
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#undef rot
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#define acc(v, a, off, step, n)\
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for (unsigned int i = off; i < n; i += step)\
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{\
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a += v[i];\
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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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//Complex float Reduce
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template <>
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inline Grid::ComplexF Reduce<Grid::ComplexF, vecf>::operator()(vecf in){
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float a = 0.f, b = 0.f;
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acc(in.v, a, 0, 2, W<float>::r);
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acc(in.v, b, 1, 2, W<float>::r);
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return Grid::ComplexF(a, b);
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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, vecf>::operator()(vecf in){
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float a = 0.;
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acc(in.v, a, 0, 1, W<float>::r);
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return a;
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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, vecd>::operator()(vecd in){
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double a = 0., b = 0.;
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acc(in.v, a, 0, 2, W<double>::r);
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acc(in.v, b, 1, 2, W<double>::r);
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return Grid::ComplexD(a, b);
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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, vecd>::operator()(vecd in){
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double a = 0.f;
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acc(in.v, a, 0, 1, W<double>::r);
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return a;
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}
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//Integer Reduce
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template<>
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inline Integer Reduce<Integer, veci>::operator()(veci in){
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Integer a = 0;
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acc(in.v, a, 0, 1, W<Integer>::r);
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return a;
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}
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#undef acc // EIGEN compatibility
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}
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//////////////////////////////////////////////////////////////////////////////////////
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// Here assign types
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typedef Optimization::vech SIMD_Htype; // Reduced precision type
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typedef Optimization::vecf SIMD_Ftype; // Single precision type
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typedef Optimization::vecd SIMD_Dtype; // Double precision type
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typedef Optimization::veci SIMD_Itype; // Integer type
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// prefetch utilities
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inline void v_prefetch0(int size, const char *ptr){};
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inline void prefetch_HINT_T0(const char *ptr){};
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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::Div DivSIMD;
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typedef Optimization::Mult MultSIMD;
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typedef Optimization::MultComplex MultComplexSIMD;
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typedef Optimization::MultRealPart MultRealPartSIMD;
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typedef Optimization::MaddRealPart MaddRealPartSIMD;
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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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