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gnss-sdr/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_8u_x2_multiply_8u.h
Carles Fernandez 7308745f05
Apply more concise file header format 
Re-license CMake scripts with BSD-3-Clause
2020-12-30 13:35:06 +01:00

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/*!
* \file volk_gnsssdr_8u_x2_multiply_8u.h
* \brief VOLK_GNSSSDR kernel: multiplies unsigned char values.
* \authors <ul>
* <li> Andres Cecilia, 2014. a.cecilia.luque(at)gmail.com
* </ul>
*
* VOLK_GNSSSDR kernel that multiplies unsigned char values (8 bits data)
*
* -----------------------------------------------------------------------------
*
* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
* This file is part of GNSS-SDR.
*
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
* SPDX-License-Identifier: GPL-3.0-or-later
*
* -----------------------------------------------------------------------------
*/
/*!
* \page volk_gnsssdr_8u_x2_multiply_8u
*
* \b Overview
*
* Multiplies two input vectors of unsigned char, point-by-point, storing the result in the third vector
*
* <b>Dispatcher Prototype</b>
* \code
* void volk_gnsssdr_8u_x2_multiply_8u(unsigned char* cChar, const unsigned char* aChar, const unsigned char* bChar, unsigned int num_points);
* \endcode
*
* \b Inputs
* \li aChar: One of the vectors to be multiplied
* \li bChar: The other vector to be multiplied
* \li num_points: The number of complex data points.
*
* \b Outputs
* \li cChar: The vector where the result will be stored
*
*/
#ifndef INCLUDED_volk_gnsssdr_8u_x2_multiply_8u_H
#define INCLUDED_volk_gnsssdr_8u_x2_multiply_8u_H
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_gnsssdr_8u_x2_multiply_8u_u_avx2(unsigned char* cChar, const unsigned char* aChar, const unsigned char* bChar, unsigned int num_points)
{
const unsigned int avx2_iters = num_points / 32;
unsigned int number;
unsigned int i;
__m256i x, y, x1, x2, y1, y2, mult1, x1_mult_y1, x2_mult_y2, tmp, tmp1, tmp2, totalc;
unsigned char* c = cChar;
const unsigned char* a = aChar;
const unsigned char* b = bChar;
for (number = 0; number < avx2_iters; number++)
{
x = _mm256_loadu_si256((__m256i*)a);
y = _mm256_loadu_si256((__m256i*)b);
mult1 = _mm256_set_epi8(0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF);
x1 = _mm256_srli_si256(x, 1);
x1 = _mm256_and_si256(x1, mult1);
x2 = _mm256_and_si256(x, mult1);
y1 = _mm256_srli_si256(y, 1);
y1 = _mm256_and_si256(y1, mult1);
y2 = _mm256_and_si256(y, mult1);
x1_mult_y1 = _mm256_mullo_epi16(x1, y1);
x2_mult_y2 = _mm256_mullo_epi16(x2, y2);
tmp = _mm256_and_si256(x1_mult_y1, mult1);
tmp1 = _mm256_slli_si256(tmp, 1);
tmp2 = _mm256_and_si256(x2_mult_y2, mult1);
totalc = _mm256_or_si256(tmp1, tmp2);
_mm256_storeu_si256((__m256i*)c, totalc);
a += 32;
b += 32;
c += 32;
}
for (i = avx2_iters * 32; i < num_points; ++i)
{
*c++ = (*a++) * (*b++);
}
}
#endif /* LV_HAVE_SSE3 */
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
static inline void volk_gnsssdr_8u_x2_multiply_8u_u_sse3(unsigned char* cChar, const unsigned char* aChar, const unsigned char* bChar, unsigned int num_points)
{
const unsigned int sse_iters = num_points / 16;
unsigned int number;
unsigned int i;
__m128i x, y, x1, x2, y1, y2, mult1, x1_mult_y1, x2_mult_y2, tmp, tmp1, tmp2, totalc;
unsigned char* c = cChar;
const unsigned char* a = aChar;
const unsigned char* b = bChar;
for (number = 0; number < sse_iters; number++)
{
x = _mm_lddqu_si128((__m128i*)a);
y = _mm_lddqu_si128((__m128i*)b);
mult1 = _mm_set_epi8(0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF);
x1 = _mm_srli_si128(x, 1);
x1 = _mm_and_si128(x1, mult1);
x2 = _mm_and_si128(x, mult1);
y1 = _mm_srli_si128(y, 1);
y1 = _mm_and_si128(y1, mult1);
y2 = _mm_and_si128(y, mult1);
x1_mult_y1 = _mm_mullo_epi16(x1, y1);
x2_mult_y2 = _mm_mullo_epi16(x2, y2);
tmp = _mm_and_si128(x1_mult_y1, mult1);
tmp1 = _mm_slli_si128(tmp, 1);
tmp2 = _mm_and_si128(x2_mult_y2, mult1);
totalc = _mm_or_si128(tmp1, tmp2);
_mm_storeu_si128((__m128i*)c, totalc);
a += 16;
b += 16;
c += 16;
}
for (i = sse_iters * 16; i < num_points; ++i)
{
*c++ = (*a++) * (*b++);
}
}
#endif /* LV_HAVE_SSE3 */
#ifdef LV_HAVE_GENERIC
static inline void volk_gnsssdr_8u_x2_multiply_8u_generic(unsigned char* cChar, const unsigned char* aChar, const unsigned char* bChar, unsigned int num_points)
{
unsigned char* cPtr = cChar;
const unsigned char* aPtr = aChar;
const unsigned char* bPtr = bChar;
unsigned int number;
for (number = 0; number < num_points; number++)
{
*cPtr++ = (*aPtr++) * (*bPtr++);
}
}
#endif /* LV_HAVE_GENERIC */
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
static inline void volk_gnsssdr_8u_x2_multiply_8u_a_sse3(unsigned char* cChar, const unsigned char* aChar, const unsigned char* bChar, unsigned int num_points)
{
const unsigned int sse_iters = num_points / 16;
unsigned int number;
unsigned int i;
__m128i x, y, x1, x2, y1, y2, mult1, x1_mult_y1, x2_mult_y2, tmp, tmp1, tmp2, totalc;
unsigned char* c = cChar;
const unsigned char* a = aChar;
const unsigned char* b = bChar;
for (number = 0; number < sse_iters; number++)
{
x = _mm_load_si128((__m128i*)a);
y = _mm_load_si128((__m128i*)b);
mult1 = _mm_set_epi8(0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF);
x1 = _mm_srli_si128(x, 1);
x1 = _mm_and_si128(x1, mult1);
x2 = _mm_and_si128(x, mult1);
y1 = _mm_srli_si128(y, 1);
y1 = _mm_and_si128(y1, mult1);
y2 = _mm_and_si128(y, mult1);
x1_mult_y1 = _mm_mullo_epi16(x1, y1);
x2_mult_y2 = _mm_mullo_epi16(x2, y2);
tmp = _mm_and_si128(x1_mult_y1, mult1);
tmp1 = _mm_slli_si128(tmp, 1);
tmp2 = _mm_and_si128(x2_mult_y2, mult1);
totalc = _mm_or_si128(tmp1, tmp2);
_mm_store_si128((__m128i*)c, totalc);
a += 16;
b += 16;
c += 16;
}
for (i = sse_iters * 16; i < num_points; ++i)
{
*c++ = (*a++) * (*b++);
}
}
#endif /* LV_HAVE_SSE */
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_gnsssdr_8u_x2_multiply_8u_a_avx2(unsigned char* cChar, const unsigned char* aChar, const unsigned char* bChar, unsigned int num_points)
{
const unsigned int avx2_iters = num_points / 32;
unsigned int number;
unsigned int i;
__m256i x, y, x1, x2, y1, y2, mult1, x1_mult_y1, x2_mult_y2, tmp, tmp1, tmp2, totalc;
unsigned char* c = cChar;
const unsigned char* a = aChar;
const unsigned char* b = bChar;
for (number = 0; number < avx2_iters; number++)
{
x = _mm256_load_si256((__m256i*)a);
y = _mm256_load_si256((__m256i*)b);
mult1 = _mm256_set_epi8(0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF);
x1 = _mm256_srli_si256(x, 1);
x1 = _mm256_and_si256(x1, mult1);
x2 = _mm256_and_si256(x, mult1);
y1 = _mm256_srli_si256(y, 1);
y1 = _mm256_and_si256(y1, mult1);
y2 = _mm256_and_si256(y, mult1);
x1_mult_y1 = _mm256_mullo_epi16(x1, y1);
x2_mult_y2 = _mm256_mullo_epi16(x2, y2);
tmp = _mm256_and_si256(x1_mult_y1, mult1);
tmp1 = _mm256_slli_si256(tmp, 1);
tmp2 = _mm256_and_si256(x2_mult_y2, mult1);
totalc = _mm256_or_si256(tmp1, tmp2);
_mm256_store_si256((__m256i*)c, totalc);
a += 32;
b += 32;
c += 32;
}
for (i = avx2_iters * 32; i < num_points; ++i)
{
*c++ = (*a++) * (*b++);
}
}
#endif /* LV_HAVE_SSE3 */
#ifdef LV_HAVE_ORC
extern void volk_gnsssdr_8u_x2_multiply_8u_a_orc_impl(unsigned char* cVector, const unsigned char* aVector, const unsigned char* bVector, unsigned int num_points);
static inline void volk_gnsssdr_8u_x2_multiply_8u_u_orc(unsigned char* cVector, const unsigned char* aVector, const unsigned char* bVector, unsigned int num_points)
{
volk_gnsssdr_8u_x2_multiply_8u_a_orc_impl(cVector, aVector, bVector, num_points);
}
#endif /* LV_HAVE_ORC */
#endif /* INCLUDED_volk_gnsssdr_8u_x2_multiply_8u_H */
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