Florian Kaltenberger
8c5e8126df
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7543 818b1a75-f10b-46b9-bf7c-635c3b92a50f
133 lines
5.4 KiB
C
Executable File
133 lines
5.4 KiB
C
Executable File
/*******************************************************************************
|
|
OpenAirInterface
|
|
Copyright(c) 1999 - 2014 Eurecom
|
|
|
|
OpenAirInterface 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
|
|
OpenAirInterface 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 OpenAirInterface.The full GNU General Public License is
|
|
included in this distribution in the file called "COPYING". If not,
|
|
see <http://www.gnu.org/licenses/>.
|
|
|
|
Contact Information
|
|
OpenAirInterface Admin: openair_admin@eurecom.fr
|
|
OpenAirInterface Tech : openair_tech@eurecom.fr
|
|
OpenAirInterface Dev : openair4g-devel@eurecom.fr
|
|
|
|
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
|
|
|
|
*******************************************************************************/
|
|
#include "defs.h"
|
|
//#include "MAC_INTERFACE/extern.h"
|
|
#ifdef USER_MODE
|
|
#include <stdio.h>
|
|
#endif
|
|
|
|
#if defined(__x86_64__) || defined(__i386__)
|
|
int16_t conjug[8]__attribute__((aligned(16))) = {-1,1,-1,1,-1,1,-1,1} ;
|
|
#define simd_q15_t __m128i
|
|
#define simdshort_q15_t __m64
|
|
#elif defined(__arm__)
|
|
int16_t conjug[4]__attribute__((aligned(16))) = {-1,1,-1,1} ;
|
|
#define simd_q15_t int16x8_t
|
|
#define simdshort_q15_t int16x4_t
|
|
#define _mm_empty()
|
|
#define _m_empty()
|
|
#endif
|
|
|
|
int mult_cpx_conj_vector(int16_t *x1,
|
|
int16_t *x2,
|
|
int16_t *y,
|
|
uint32_t N,
|
|
int output_shift)
|
|
{
|
|
// Multiply elementwise two complex vectors of N elements with repeated formatted output
|
|
// x1 - input 1 in the format |Re0 Im0 Re1 Im1|,......,|Re(N-2) Im(N-2) Re(N-1) Im(N-1)|
|
|
// We assume x1 with a dinamic of 15 bit maximum
|
|
//
|
|
// x2 - input 2 in the format |Re0 Im0 Re1 Im1|,......,|Re(N-2) Im(N-2) Re(N-1) Im(N-1)|
|
|
// We assume x2 with a dinamic of 14 bit maximum
|
|
///
|
|
// y - output in the format |Re0 Im0 Re1 Im1|,......,|Re(N-2) Im(N-2) Re(N-1) Im(N-1)|
|
|
//
|
|
// N - the size f the vectors (this function does N cpx mpy. WARNING: N>=4;
|
|
//
|
|
// output_shift - shift to be applied to generate output
|
|
|
|
uint32_t i; // loop counter
|
|
|
|
simd_q15_t *x1_128;
|
|
simd_q15_t *x2_128;
|
|
simd_q15_t *y_128;
|
|
#if defined(__x86_64__) || defined(__i386__)
|
|
simd_q15_t tmp_re,tmp_im;
|
|
simd_q15_t tmpy0,tmpy1;
|
|
#elif defined(__arm__)
|
|
int32x4_t tmp_re,tmp_im;
|
|
int32x4_t tmp_re1,tmp_im1;
|
|
int16x4x2_t tmpy;
|
|
int32x4_t shift = vdupq_n_s32(-output_shift);
|
|
#endif
|
|
|
|
x1_128 = (simd_q15_t *)&x1[0];
|
|
x2_128 = (simd_q15_t *)&x2[0];
|
|
y_128 = (simd_q15_t *)&y[0];
|
|
|
|
|
|
// we compute 4 cpx multiply for each loop
|
|
for(i=0; i<(N>>2); i++) {
|
|
#if defined(__x86_64__) || defined(__i386__)
|
|
tmp_re = _mm_madd_epi16(*x1_128,*x2_128);
|
|
tmp_im = _mm_shufflelo_epi16(*x1_128,_MM_SHUFFLE(2,3,0,1));
|
|
tmp_im = _mm_shufflehi_epi16(tmp_im,_MM_SHUFFLE(2,3,0,1));
|
|
tmp_im = _mm_sign_epi16(tmp_im,*(__m128i*)&conjug[0]);
|
|
tmp_im = _mm_madd_epi16(tmp_im,*x1_128);
|
|
tmp_re = _mm_srai_epi32(tmp_re,output_shift);
|
|
tmp_im = _mm_srai_epi32(tmp_im,output_shift);
|
|
tmpy0 = _mm_unpacklo_epi32(tmp_re,tmp_im);
|
|
tmpy1 = _mm_unpackhi_epi32(tmp_re,tmp_im);
|
|
*y_128 = _mm_packs_epi32(tmpy0,tmpy1);
|
|
#elif defined(__arm__)
|
|
|
|
tmp_re = vmull_s16(((simdshort_q15_t *)x1_128)[0], ((simdshort_q15_t*)x2_128)[0]);
|
|
//tmp_re = [Re(x1[0])Re(x2[0]) Im(x1[0])Im(x2[0]) Re(x1[1])Re(x2[1]) Im(x1[1])Im(x2[1])]
|
|
tmp_re1 = vmull_s16(((simdshort_q15_t *)x1_128)[1], ((simdshort_q15_t*)x2_128)[1]);
|
|
//tmp_re1 = [Re(x1[1])Re(x2[1]) Im(x1[1])Im(x2[1]) Re(x1[1])Re(x2[2]) Im(x1[1])Im(x2[2])]
|
|
tmp_re = vcombine_s32(vpadd_s32(vget_low_s32(tmp_re),vget_high_s32(tmp_re)),
|
|
vpadd_s32(vget_low_s32(tmp_re1),vget_high_s32(tmp_re1)));
|
|
//tmp_re = [Re(ch[0])Re(rx[0])+Im(ch[0])Im(ch[0]) Re(ch[1])Re(rx[1])+Im(ch[1])Im(ch[1]) Re(ch[2])Re(rx[2])+Im(ch[2]) Im(ch[2]) Re(ch[3])Re(rx[3])+Im(ch[3])Im(ch[3])]
|
|
|
|
tmp_im = vmull_s16(vrev32_s16(vmul_s16(((simdshort_q15_t*)x2_128)[0],*(simdshort_q15_t*)conjug)), ((simdshort_q15_t*)x1_128)[0]);
|
|
//tmp_im = [-Im(ch[0])Re(rx[0]) Re(ch[0])Im(rx[0]) -Im(ch[1])Re(rx[1]) Re(ch[1])Im(rx[1])]
|
|
tmp_im1 = vmull_s16(vrev32_s16(vmul_s16(((simdshort_q15_t*)x2_128)[1],*(simdshort_q15_t*)conjug)), ((simdshort_q15_t*)x1_128)[1]);
|
|
//tmp_im1 = [-Im(ch[2])Re(rx[2]) Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3]) Re(ch[3])Im(rx[3])]
|
|
tmp_im = vcombine_s32(vpadd_s32(vget_low_s32(tmp_im),vget_high_s32(tmp_im)),
|
|
vpadd_s32(vget_low_s32(tmp_im1),vget_high_s32(tmp_im1)));
|
|
//tmp_im = [-Im(ch[0])Re(rx[0])+Re(ch[0])Im(rx[0]) -Im(ch[1])Re(rx[1])+Re(ch[1])Im(rx[1]) -Im(ch[2])Re(rx[2])+Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3])+Re(ch[3])Im(rx[3])]
|
|
|
|
tmp_re = vqshlq_s32(tmp_re,shift);
|
|
tmp_im = vqshlq_s32(tmp_im,shift);
|
|
tmpy = vzip_s16(vmovn_s32(tmp_re),vmovn_s32(tmp_im));
|
|
*y_128 = vcombine_s16(tmpy.val[0],tmpy.val[1]);
|
|
#endif
|
|
x1_128++;
|
|
x2_128++;
|
|
y_128++;
|
|
}
|
|
|
|
|
|
_mm_empty();
|
|
_m_empty();
|
|
|
|
return(0);
|
|
}
|