cosmotool/external/sharp/libsharp/sharp_complex_hacks.h

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2012-11-10 14:59:10 +01:00
/*
* This file is part of libsharp.
*
* libsharp 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.
*
* libsharp 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 libsharp; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* libsharp is being developed at the Max-Planck-Institut fuer Astrophysik
* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
* (DLR).
*/
/* \file sharp_complex_hacks.h
* support for converting vector types and complex numbers
*
* Copyright (C) 2012 Max-Planck-Society
* Author: Martin Reinecke
*/
#ifndef SHARP_COMPLEX_HACKS_H
#define SHARP_COMPLEX_HACKS_H
#ifdef __cplusplus
#error This header file cannot be included from C++, only from C
#endif
#include <math.h>
#include <complex.h>
#include "sharp_vecsupport.h"
#define UNSAFE_CODE
#if (VLEN==1)
static inline complex double vhsum_cmplx(Tv a, Tv b)
{ return a+_Complex_I*b; }
static inline void vhsum_cmplx2 (Tv a, Tv b, Tv c, Tv d,
complex double * restrict c1, complex double * restrict c2)
{ *c1 += a+_Complex_I*b; *c2 += c+_Complex_I*d; }
#endif
#if (VLEN==2)
static inline complex double vhsum_cmplx (Tv a, Tv b)
{
#if defined(__SSE3__)
Tv tmp = _mm_hadd_pd(a,b);
#else
Tv tmp = vadd(_mm_shuffle_pd(a,b,_MM_SHUFFLE2(0,1)),
_mm_shuffle_pd(a,b,_MM_SHUFFLE2(1,0)));
#endif
union {Tv v; complex double c; } u;
u.v=tmp; return u.c;
}
static inline void vhsum_cmplx2 (Tv a, Tv b, Tv c,
Tv d, complex double * restrict c1, complex double * restrict c2)
{
#ifdef UNSAFE_CODE
#if defined(__SSE3__)
vaddeq(*((__m128d *)c1),_mm_hadd_pd(a,b));
vaddeq(*((__m128d *)c2),_mm_hadd_pd(c,d));
#else
vaddeq(*((__m128d *)c1),vadd(_mm_shuffle_pd(a,b,_MM_SHUFFLE2(0,1)),
_mm_shuffle_pd(a,b,_MM_SHUFFLE2(1,0))));
vaddeq(*((__m128d *)c2),vadd(_mm_shuffle_pd(c,d,_MM_SHUFFLE2(0,1)),
_mm_shuffle_pd(c,d,_MM_SHUFFLE2(1,0))));
#endif
#else
union {Tv v; complex double c; } u1, u2;
#if defined(__SSE3__)
u1.v = _mm_hadd_pd(a,b); u2.v=_mm_hadd_pd(c,d);
#else
u1.v = vadd(_mm_shuffle_pd(a,b,_MM_SHUFFLE2(0,1)),
_mm_shuffle_pd(a,b,_MM_SHUFFLE2(1,0)));
u2.v = vadd(_mm_shuffle_pd(c,d,_MM_SHUFFLE2(0,1)),
_mm_shuffle_pd(c,d,_MM_SHUFFLE2(1,0)));
#endif
*c1+=u1.c; *c2+=u2.c;
#endif
}
#endif
#if (VLEN==4)
static inline complex double vhsum_cmplx (Tv a, Tv b)
{
Tv tmp=_mm256_hadd_pd(a,b);
Tv tmp2=_mm256_permute2f128_pd(tmp,tmp,1);
tmp=_mm256_add_pd(tmp,tmp2);
#ifdef UNSAFE_CODE
complex double ret;
*((__m128d *)&ret)=_mm256_extractf128_pd(tmp, 0);
return ret;
#else
union {Tv v; complex double c[2]; } u;
u.v=tmp; return u.c[0];
#endif
}
static inline void vhsum_cmplx2 (Tv a, Tv b, Tv c, Tv d,
complex double * restrict c1, complex double * restrict c2)
{
Tv tmp1=_mm256_hadd_pd(a,b), tmp2=_mm256_hadd_pd(c,d);
Tv tmp3=_mm256_permute2f128_pd(tmp1,tmp2,49),
tmp4=_mm256_permute2f128_pd(tmp1,tmp2,32);
tmp1=vadd(tmp3,tmp4);
#ifdef UNSAFE_CODE
*((__m128d *)c1)=_mm_add_pd(*((__m128d *)c1),_mm256_extractf128_pd(tmp1, 0));
*((__m128d *)c2)=_mm_add_pd(*((__m128d *)c2),_mm256_extractf128_pd(tmp1, 1));
#else
union {Tv v; complex double c[2]; } u;
u.v=tmp1;
*c1+=u.c[0]; *c2+=u.c[1];
#endif
}
#endif
#endif