mirror of https://github.com/gnss-sdr/gnss-sdr
206 lines
6.7 KiB
C
206 lines
6.7 KiB
C
/*!
|
|
* \file volk_gnsssdr_8ic_s8ic_multiply_8ic.h
|
|
* \brief VOLK_GNSSSDR kernel: multiplies a group of 16 bits vectors by one constant vector.
|
|
* \authors <ul>
|
|
* <li> Andres Cecilia, 2014. a.cecilia.luque(at)gmail.com
|
|
* </ul>
|
|
*
|
|
* VOLK_GNSSSDR kernel that multiplies a group of 16 bits vectors
|
|
* (8 bits the real part and 8 bits the imaginary part) by one constant vector
|
|
*
|
|
* -----------------------------------------------------------------------------
|
|
*
|
|
* 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_8ic_s8ic_multiply_8ic
|
|
*
|
|
* \b Overview
|
|
*
|
|
* Multiplies the input vector by a scalar and stores the results in the third vector
|
|
*
|
|
* <b>Dispatcher Prototype</b>
|
|
* \code
|
|
* void volk_gnsssdr_8ic_s8ic_multiply_8ic(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points);
|
|
* \endcode
|
|
*
|
|
* \b Inputs
|
|
* \li aVector: The vector to be multiplied.
|
|
* \li scalar The complex scalar to multiply \p aVector
|
|
* \li num_points: The number of complex values in \p aVector to be multiplied by \p scalar and stored into \p cVector.
|
|
*
|
|
* \b Outputs
|
|
* \li cVector: The vector where the results will be stored
|
|
*
|
|
*/
|
|
|
|
#ifndef INCLUDED_volk_gnsssdr_8ic_s8ic_multiply_8ic_H
|
|
#define INCLUDED_volk_gnsssdr_8ic_s8ic_multiply_8ic_H
|
|
|
|
#include <volk_gnsssdr/volk_gnsssdr_complex.h>
|
|
|
|
#ifdef LV_HAVE_SSE3
|
|
#include <pmmintrin.h>
|
|
|
|
static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_u_sse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points)
|
|
{
|
|
unsigned int number = 0;
|
|
const unsigned int sse_iters = num_points / 8;
|
|
|
|
__m128i x, y, mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, realc, imagc, totalc;
|
|
|
|
lv_8sc_t* c = cVector;
|
|
const lv_8sc_t* a = aVector;
|
|
|
|
mult1 = _mm_set_epi8(0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF);
|
|
|
|
y = _mm_set1_epi16(*(short*)&scalar);
|
|
imagy = _mm_srli_si128(y, 1);
|
|
imagy = _mm_and_si128(imagy, mult1);
|
|
realy = _mm_and_si128(y, mult1);
|
|
|
|
for (; number < sse_iters; number++)
|
|
{
|
|
x = _mm_lddqu_si128((__m128i*)a);
|
|
|
|
imagx = _mm_srli_si128(x, 1);
|
|
imagx = _mm_and_si128(imagx, mult1);
|
|
realx = _mm_and_si128(x, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16(realx, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16(imagx, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16(realx, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16(imagx, realy);
|
|
|
|
realc = _mm_sub_epi16(realx_mult_realy, imagx_mult_imagy);
|
|
realc = _mm_and_si128(realc, mult1);
|
|
imagc = _mm_add_epi16(realx_mult_imagy, imagx_mult_realy);
|
|
imagc = _mm_and_si128(imagc, mult1);
|
|
imagc = _mm_slli_si128(imagc, 1);
|
|
|
|
totalc = _mm_or_si128(realc, imagc);
|
|
|
|
_mm_storeu_si128((__m128i*)c, totalc);
|
|
|
|
a += 8;
|
|
c += 8;
|
|
}
|
|
|
|
for (number = sse_iters * 8; number < num_points; ++number)
|
|
{
|
|
*c++ = (*a++) * scalar;
|
|
}
|
|
}
|
|
#endif /* LV_HAVE_SSE3 */
|
|
|
|
|
|
#ifdef LV_HAVE_GENERIC
|
|
|
|
static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_generic(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points)
|
|
{
|
|
/*lv_8sc_t* cPtr = cVector;
|
|
const lv_8sc_t* aPtr = aVector;
|
|
|
|
for (int i = 0; i<num_points; ++i)
|
|
{
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
}*/
|
|
|
|
lv_8sc_t* cPtr = cVector;
|
|
const lv_8sc_t* aPtr = aVector;
|
|
unsigned int number = num_points;
|
|
|
|
// unwrap loop
|
|
while (number >= 8)
|
|
{
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
*cPtr++ = (*aPtr++) * scalar;
|
|
number -= 8;
|
|
}
|
|
|
|
// clean up any remaining
|
|
while (number-- > 0)
|
|
*cPtr++ = *aPtr++ * scalar;
|
|
}
|
|
#endif /* LV_HAVE_GENERIC */
|
|
|
|
|
|
#ifdef LV_HAVE_SSE3
|
|
#include <pmmintrin.h>
|
|
|
|
static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_a_sse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points)
|
|
{
|
|
unsigned int number = 0;
|
|
const unsigned int sse_iters = num_points / 8;
|
|
|
|
__m128i x, y, mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, realc, imagc, totalc;
|
|
|
|
lv_8sc_t* c = cVector;
|
|
const lv_8sc_t* a = aVector;
|
|
|
|
mult1 = _mm_set_epi8(0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF);
|
|
|
|
y = _mm_set1_epi16(*(short*)&scalar);
|
|
imagy = _mm_srli_si128(y, 1);
|
|
imagy = _mm_and_si128(imagy, mult1);
|
|
realy = _mm_and_si128(y, mult1);
|
|
|
|
for (; number < sse_iters; number++)
|
|
{
|
|
x = _mm_load_si128((__m128i*)a);
|
|
|
|
imagx = _mm_srli_si128(x, 1);
|
|
imagx = _mm_and_si128(imagx, mult1);
|
|
realx = _mm_and_si128(x, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16(realx, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16(imagx, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16(realx, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16(imagx, realy);
|
|
|
|
realc = _mm_sub_epi16(realx_mult_realy, imagx_mult_imagy);
|
|
realc = _mm_and_si128(realc, mult1);
|
|
imagc = _mm_add_epi16(realx_mult_imagy, imagx_mult_realy);
|
|
imagc = _mm_and_si128(imagc, mult1);
|
|
imagc = _mm_slli_si128(imagc, 1);
|
|
|
|
totalc = _mm_or_si128(realc, imagc);
|
|
|
|
_mm_store_si128((__m128i*)c, totalc);
|
|
|
|
a += 8;
|
|
c += 8;
|
|
}
|
|
|
|
for (number = sse_iters * 8; number < num_points; ++number)
|
|
{
|
|
*c++ = (*a++) * scalar;
|
|
}
|
|
}
|
|
#endif /* LV_HAVE_SSE3 */
|
|
|
|
|
|
#ifdef LV_HAVE_ORC
|
|
|
|
extern void volk_gnsssdr_8ic_s8ic_multiply_8ic_a_orc_impl(lv_8sc_t* cVector, const lv_8sc_t* aVector, const char scalarreal, const char scalarimag, unsigned int num_points);
|
|
static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_u_orc(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points)
|
|
{
|
|
volk_gnsssdr_8ic_s8ic_multiply_8ic_a_orc_impl(cVector, aVector, lv_creal(scalar), lv_cimag(scalar), num_points);
|
|
}
|
|
#endif /* LV_HAVE_ORC */
|
|
|
|
#endif /* INCLUDED_volk_gnsssdr_32fc_x2_multiply_32fc_H */
|