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volk_8i_s32f_convert_32f.h
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volk_8i_s32f_convert_32f.h
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/* -*- c++ -*- */
/*
* Copyright 2012, 2014 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
/*!
* \page volk_8i_s32f_convert_32f
*
* \b Overview
*
* Convert the input vector of 8-bit chars to a vector of floats. The
* floats are then divided by the scalar factor. shorts.
*
* <b>Dispatcher Prototype</b>
* \code
* void volk_8i_s32f_convert_32f(float* outputVector, const int8_t* inputVector, const
* float scalar, unsigned int num_points) \endcode
*
* \b Inputs
* \li inputVector: The input vector of 8-bit chars.
* \li scalar: the scaling factor used to divide the results of the conversion.
* \li num_points: The number of values.
*
* \b Outputs
* \li outputVector: The output 16-bit shorts.
*
* \b Example
* \code
* int N = 10000;
*
* volk_8i_s32f_convert_32f();
*
* volk_free(x);
* \endcode
*/
#ifndef INCLUDED_volk_8i_s32f_convert_32f_u_H
#define INCLUDED_volk_8i_s32f_convert_32f_u_H
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_8i_s32f_convert_32f_u_avx2(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int sixteenthPoints = num_points / 16;
float* outputVectorPtr = outputVector;
const float iScalar = 1.0 / scalar;
__m256 invScalar = _mm256_set1_ps(iScalar);
const int8_t* inputVectorPtr = inputVector;
__m256 ret;
__m128i inputVal128;
__m256i interimVal;
for (; number < sixteenthPoints; number++) {
inputVal128 = _mm_loadu_si128((__m128i*)inputVectorPtr);
interimVal = _mm256_cvtepi8_epi32(inputVal128);
ret = _mm256_cvtepi32_ps(interimVal);
ret = _mm256_mul_ps(ret, invScalar);
_mm256_storeu_ps(outputVectorPtr, ret);
outputVectorPtr += 8;
inputVal128 = _mm_srli_si128(inputVal128, 8);
interimVal = _mm256_cvtepi8_epi32(inputVal128);
ret = _mm256_cvtepi32_ps(interimVal);
ret = _mm256_mul_ps(ret, invScalar);
_mm256_storeu_ps(outputVectorPtr, ret);
outputVectorPtr += 8;
inputVectorPtr += 16;
}
number = sixteenthPoints * 16;
for (; number < num_points; number++) {
outputVector[number] = (float)(inputVector[number]) * iScalar;
}
}
#endif /* LV_HAVE_AVX2 */
#ifdef LV_HAVE_SSE4_1
#include <smmintrin.h>
static inline void volk_8i_s32f_convert_32f_u_sse4_1(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int sixteenthPoints = num_points / 16;
float* outputVectorPtr = outputVector;
const float iScalar = 1.0 / scalar;
__m128 invScalar = _mm_set_ps1(iScalar);
const int8_t* inputVectorPtr = inputVector;
__m128 ret;
__m128i inputVal;
__m128i interimVal;
for (; number < sixteenthPoints; number++) {
inputVal = _mm_loadu_si128((__m128i*)inputVectorPtr);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_storeu_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVal = _mm_srli_si128(inputVal, 4);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_storeu_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVal = _mm_srli_si128(inputVal, 4);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_storeu_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVal = _mm_srli_si128(inputVal, 4);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_storeu_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVectorPtr += 16;
}
number = sixteenthPoints * 16;
for (; number < num_points; number++) {
outputVector[number] = (float)(inputVector[number]) * iScalar;
}
}
#endif /* LV_HAVE_SSE4_1 */
#ifdef LV_HAVE_GENERIC
static inline void volk_8i_s32f_convert_32f_generic(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
float* outputVectorPtr = outputVector;
const int8_t* inputVectorPtr = inputVector;
unsigned int number = 0;
const float iScalar = 1.0 / scalar;
for (number = 0; number < num_points; number++) {
*outputVectorPtr++ = ((float)(*inputVectorPtr++)) * iScalar;
}
}
#endif /* LV_HAVE_GENERIC */
#endif /* INCLUDED_VOLK_8s_CONVERT_32f_UNALIGNED8_H */
#ifndef INCLUDED_volk_8i_s32f_convert_32f_a_H
#define INCLUDED_volk_8i_s32f_convert_32f_a_H
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_8i_s32f_convert_32f_a_avx2(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int sixteenthPoints = num_points / 16;
float* outputVectorPtr = outputVector;
const float iScalar = 1.0 / scalar;
__m256 invScalar = _mm256_set1_ps(iScalar);
const int8_t* inputVectorPtr = inputVector;
__m256 ret;
__m128i inputVal128;
__m256i interimVal;
for (; number < sixteenthPoints; number++) {
inputVal128 = _mm_load_si128((__m128i*)inputVectorPtr);
interimVal = _mm256_cvtepi8_epi32(inputVal128);
ret = _mm256_cvtepi32_ps(interimVal);
ret = _mm256_mul_ps(ret, invScalar);
_mm256_store_ps(outputVectorPtr, ret);
outputVectorPtr += 8;
inputVal128 = _mm_srli_si128(inputVal128, 8);
interimVal = _mm256_cvtepi8_epi32(inputVal128);
ret = _mm256_cvtepi32_ps(interimVal);
ret = _mm256_mul_ps(ret, invScalar);
_mm256_store_ps(outputVectorPtr, ret);
outputVectorPtr += 8;
inputVectorPtr += 16;
}
number = sixteenthPoints * 16;
for (; number < num_points; number++) {
outputVector[number] = (float)(inputVector[number]) * iScalar;
}
}
#endif /* LV_HAVE_AVX2 */
#ifdef LV_HAVE_SSE4_1
#include <smmintrin.h>
static inline void volk_8i_s32f_convert_32f_a_sse4_1(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int sixteenthPoints = num_points / 16;
float* outputVectorPtr = outputVector;
const float iScalar = 1.0 / scalar;
__m128 invScalar = _mm_set_ps1(iScalar);
const int8_t* inputVectorPtr = inputVector;
__m128 ret;
__m128i inputVal;
__m128i interimVal;
for (; number < sixteenthPoints; number++) {
inputVal = _mm_load_si128((__m128i*)inputVectorPtr);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_store_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVal = _mm_srli_si128(inputVal, 4);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_store_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVal = _mm_srli_si128(inputVal, 4);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_store_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVal = _mm_srli_si128(inputVal, 4);
interimVal = _mm_cvtepi8_epi32(inputVal);
ret = _mm_cvtepi32_ps(interimVal);
ret = _mm_mul_ps(ret, invScalar);
_mm_store_ps(outputVectorPtr, ret);
outputVectorPtr += 4;
inputVectorPtr += 16;
}
number = sixteenthPoints * 16;
for (; number < num_points; number++) {
outputVector[number] = (float)(inputVector[number]) * iScalar;
}
}
#endif /* LV_HAVE_SSE4_1 */
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
static inline void volk_8i_s32f_convert_32f_neon(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
float* outputVectorPtr = outputVector;
const int8_t* inputVectorPtr = inputVector;
const float iScalar = 1.0 / scalar;
const float32x4_t qiScalar = vdupq_n_f32(iScalar);
int8x16_t inputVal;
int16x8_t lower;
int16x8_t higher;
float32x4_t outputFloat;
unsigned int number = 0;
const unsigned int sixteenthPoints = num_points / 16;
for (; number < sixteenthPoints; number++) {
inputVal = vld1q_s8(inputVectorPtr);
inputVectorPtr += 16;
lower = vmovl_s8(vget_low_s8(inputVal));
higher = vmovl_s8(vget_high_s8(inputVal));
outputFloat = vmulq_f32(vcvtq_f32_s32(vmovl_s16(vget_low_s16(lower))), qiScalar);
vst1q_f32(outputVectorPtr, outputFloat);
outputVectorPtr += 4;
outputFloat = vmulq_f32(vcvtq_f32_s32(vmovl_s16(vget_high_s16(lower))), qiScalar);
vst1q_f32(outputVectorPtr, outputFloat);
outputVectorPtr += 4;
outputFloat = vmulq_f32(vcvtq_f32_s32(vmovl_s16(vget_low_s16(higher))), qiScalar);
vst1q_f32(outputVectorPtr, outputFloat);
outputVectorPtr += 4;
outputFloat =
vmulq_f32(vcvtq_f32_s32(vmovl_s16(vget_high_s16(higher))), qiScalar);
vst1q_f32(outputVectorPtr, outputFloat);
outputVectorPtr += 4;
}
for (number = sixteenthPoints * 16; number < num_points; number++) {
*outputVectorPtr++ = ((float)(*inputVectorPtr++)) * iScalar;
}
}
#endif /* LV_HAVE_NEON */
#ifdef LV_HAVE_GENERIC
static inline void volk_8i_s32f_convert_32f_a_generic(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
float* outputVectorPtr = outputVector;
const int8_t* inputVectorPtr = inputVector;
unsigned int number = 0;
const float iScalar = 1.0 / scalar;
for (number = 0; number < num_points; number++) {
*outputVectorPtr++ = ((float)(*inputVectorPtr++)) * iScalar;
}
}
#endif /* LV_HAVE_GENERIC */
#ifdef LV_HAVE_ORC
extern void volk_8i_s32f_convert_32f_a_orc_impl(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points);
static inline void volk_8i_s32f_convert_32f_u_orc(float* outputVector,
const int8_t* inputVector,
const float scalar,
unsigned int num_points)
{
float invscalar = 1.0 / scalar;
volk_8i_s32f_convert_32f_a_orc_impl(outputVector, inputVector, invscalar, num_points);
}
#endif /* LV_HAVE_ORC */
#endif /* INCLUDED_VOLK_8s_CONVERT_32f_ALIGNED8_H */