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volk_32f_s32f_stddev_32f.h
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/* -*- c++ -*- */
/*
* Copyright 2012, 2014 Free Software Foundation, Inc.
*
* This file is part of VOLK
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
#ifndef INCLUDED_volk_32f_s32f_stddev_32f_a_H
#define INCLUDED_volk_32f_s32f_stddev_32f_a_H
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
#include <volk/volk_common.h>
#ifdef LV_HAVE_SSE4_1
#include <smmintrin.h>
static inline void volk_32f_s32f_stddev_32f_a_sse4_1(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
float returnValue = 0;
if (num_points > 0) {
unsigned int number = 0;
const unsigned int sixteenthPoints = num_points / 16;
const float* aPtr = inputBuffer;
__VOLK_ATTR_ALIGNED(16) float squareBuffer[4];
__m128 squareAccumulator = _mm_setzero_ps();
__m128 aVal1, aVal2, aVal3, aVal4;
__m128 cVal1, cVal2, cVal3, cVal4;
for (; number < sixteenthPoints; number++) {
aVal1 = _mm_load_ps(aPtr);
aPtr += 4;
cVal1 = _mm_dp_ps(aVal1, aVal1, 0xF1);
aVal2 = _mm_load_ps(aPtr);
aPtr += 4;
cVal2 = _mm_dp_ps(aVal2, aVal2, 0xF2);
aVal3 = _mm_load_ps(aPtr);
aPtr += 4;
cVal3 = _mm_dp_ps(aVal3, aVal3, 0xF4);
aVal4 = _mm_load_ps(aPtr);
aPtr += 4;
cVal4 = _mm_dp_ps(aVal4, aVal4, 0xF8);
cVal1 = _mm_or_ps(cVal1, cVal2);
cVal3 = _mm_or_ps(cVal3, cVal4);
cVal1 = _mm_or_ps(cVal1, cVal3);
squareAccumulator =
_mm_add_ps(squareAccumulator, cVal1); // squareAccumulator += x^2
}
_mm_store_ps(squareBuffer,
squareAccumulator); // Store the results back into the C container
returnValue = squareBuffer[0];
returnValue += squareBuffer[1];
returnValue += squareBuffer[2];
returnValue += squareBuffer[3];
number = sixteenthPoints * 16;
for (; number < num_points; number++) {
returnValue += (*aPtr) * (*aPtr);
aPtr++;
}
returnValue /= num_points;
returnValue -= (mean * mean);
returnValue = sqrtf(returnValue);
}
*stddev = returnValue;
}
#endif /* LV_HAVE_SSE4_1 */
#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
static inline void volk_32f_s32f_stddev_32f_a_sse(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
float returnValue = 0;
if (num_points > 0) {
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
const float* aPtr = inputBuffer;
__VOLK_ATTR_ALIGNED(16) float squareBuffer[4];
__m128 squareAccumulator = _mm_setzero_ps();
__m128 aVal = _mm_setzero_ps();
for (; number < quarterPoints; number++) {
aVal = _mm_load_ps(aPtr); // aVal = x
aVal = _mm_mul_ps(aVal, aVal); // squareAccumulator += x^2
squareAccumulator = _mm_add_ps(squareAccumulator, aVal);
aPtr += 4;
}
_mm_store_ps(squareBuffer,
squareAccumulator); // Store the results back into the C container
returnValue = squareBuffer[0];
returnValue += squareBuffer[1];
returnValue += squareBuffer[2];
returnValue += squareBuffer[3];
number = quarterPoints * 4;
for (; number < num_points; number++) {
returnValue += (*aPtr) * (*aPtr);
aPtr++;
}
returnValue /= num_points;
returnValue -= (mean * mean);
returnValue = sqrtf(returnValue);
}
*stddev = returnValue;
}
#endif /* LV_HAVE_SSE */
#ifdef LV_HAVE_AVX
#include <immintrin.h>
static inline void volk_32f_s32f_stddev_32f_a_avx(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
float stdDev = 0;
if (num_points > 0) {
unsigned int number = 0;
const unsigned int thirtySecondthPoints = num_points / 32;
const float* aPtr = inputBuffer;
__VOLK_ATTR_ALIGNED(32) float squareBuffer[8];
__m256 squareAccumulator = _mm256_setzero_ps();
__m256 aVal1, aVal2, aVal3, aVal4;
__m256 cVal1, cVal2, cVal3, cVal4;
for (; number < thirtySecondthPoints; number++) {
aVal1 = _mm256_load_ps(aPtr);
aPtr += 8;
cVal1 = _mm256_dp_ps(aVal1, aVal1, 0xF1);
aVal2 = _mm256_load_ps(aPtr);
aPtr += 8;
cVal2 = _mm256_dp_ps(aVal2, aVal2, 0xF2);
aVal3 = _mm256_load_ps(aPtr);
aPtr += 8;
cVal3 = _mm256_dp_ps(aVal3, aVal3, 0xF4);
aVal4 = _mm256_load_ps(aPtr);
aPtr += 8;
cVal4 = _mm256_dp_ps(aVal4, aVal4, 0xF8);
cVal1 = _mm256_or_ps(cVal1, cVal2);
cVal3 = _mm256_or_ps(cVal3, cVal4);
cVal1 = _mm256_or_ps(cVal1, cVal3);
squareAccumulator =
_mm256_add_ps(squareAccumulator, cVal1); // squareAccumulator += x^2
}
_mm256_store_ps(squareBuffer,
squareAccumulator); // Store the results back into the C container
stdDev = squareBuffer[0];
stdDev += squareBuffer[1];
stdDev += squareBuffer[2];
stdDev += squareBuffer[3];
stdDev += squareBuffer[4];
stdDev += squareBuffer[5];
stdDev += squareBuffer[6];
stdDev += squareBuffer[7];
number = thirtySecondthPoints * 32;
for (; number < num_points; number++) {
stdDev += (*aPtr) * (*aPtr);
aPtr++;
}
stdDev /= num_points;
stdDev -= (mean * mean);
stdDev = sqrtf(stdDev);
}
*stddev = stdDev;
}
#endif /* LV_HAVE_AVX */
#ifdef LV_HAVE_GENERIC
static inline void volk_32f_s32f_stddev_32f_generic(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
float returnValue = 0;
if (num_points > 0) {
const float* aPtr = inputBuffer;
unsigned int number = 0;
for (number = 0; number < num_points; number++) {
returnValue += (*aPtr) * (*aPtr);
aPtr++;
}
returnValue /= num_points;
returnValue -= (mean * mean);
returnValue = sqrtf(returnValue);
}
*stddev = returnValue;
}
#endif /* LV_HAVE_GENERIC */
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
static inline void volk_32f_s32f_stddev_32f_neon(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
float returnValue = 0;
if (num_points > 0) {
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
const float* aPtr = inputBuffer;
float32x4_t squareAccumulator = vdupq_n_f32(0.0f);
for (; number < quarterPoints; number++) {
float32x4_t aVal = vld1q_f32(aPtr);
squareAccumulator = vmlaq_f32(squareAccumulator, aVal, aVal);
aPtr += 4;
}
// Reduce the accumulator
float32x2_t sum =
vadd_f32(vget_low_f32(squareAccumulator), vget_high_f32(squareAccumulator));
sum = vpadd_f32(sum, sum);
returnValue = vget_lane_f32(sum, 0);
number = quarterPoints * 4;
for (; number < num_points; number++) {
returnValue += (*aPtr) * (*aPtr);
aPtr++;
}
returnValue /= num_points;
returnValue -= (mean * mean);
returnValue = sqrtf(returnValue);
}
*stddev = returnValue;
}
#endif /* LV_HAVE_NEON */
#ifdef LV_HAVE_NEONV8
#include <arm_neon.h>
static inline void volk_32f_s32f_stddev_32f_neonv8(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
float returnValue = 0;
if (num_points > 0) {
unsigned int number = 0;
const unsigned int eighthPoints = num_points / 8;
const float* aPtr = inputBuffer;
float32x4_t squareAccumulator0 = vdupq_n_f32(0.0f);
float32x4_t squareAccumulator1 = vdupq_n_f32(0.0f);
for (; number < eighthPoints; number++) {
__VOLK_PREFETCH(aPtr + 16);
float32x4_t aVal0 = vld1q_f32(aPtr);
float32x4_t aVal1 = vld1q_f32(aPtr + 4);
squareAccumulator0 = vfmaq_f32(squareAccumulator0, aVal0, aVal0);
squareAccumulator1 = vfmaq_f32(squareAccumulator1, aVal1, aVal1);
aPtr += 8;
}
// Combine and reduce the accumulators
float32x4_t squareAccumulator = vaddq_f32(squareAccumulator0, squareAccumulator1);
returnValue = vaddvq_f32(squareAccumulator);
number = eighthPoints * 8;
for (; number < num_points; number++) {
returnValue += (*aPtr) * (*aPtr);
aPtr++;
}
returnValue /= num_points;
returnValue -= (mean * mean);
returnValue = sqrtf(returnValue);
}
*stddev = returnValue;
}
#endif /* LV_HAVE_NEONV8 */
#endif /* INCLUDED_volk_32f_s32f_stddev_32f_a_H */
#ifndef INCLUDED_volk_32f_s32f_stddev_32f_u_H
#define INCLUDED_volk_32f_s32f_stddev_32f_u_H
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
#include <volk/volk_common.h>
#ifdef LV_HAVE_AVX
#include <immintrin.h>
static inline void volk_32f_s32f_stddev_32f_u_avx(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
float stdDev = 0;
if (num_points > 0) {
unsigned int number = 0;
const unsigned int thirtySecondthPoints = num_points / 32;
const float* aPtr = inputBuffer;
__VOLK_ATTR_ALIGNED(32) float squareBuffer[8];
__m256 squareAccumulator = _mm256_setzero_ps();
__m256 aVal1, aVal2, aVal3, aVal4;
__m256 cVal1, cVal2, cVal3, cVal4;
for (; number < thirtySecondthPoints; number++) {
aVal1 = _mm256_loadu_ps(aPtr);
aPtr += 8;
cVal1 = _mm256_dp_ps(aVal1, aVal1, 0xF1);
aVal2 = _mm256_loadu_ps(aPtr);
aPtr += 8;
cVal2 = _mm256_dp_ps(aVal2, aVal2, 0xF2);
aVal3 = _mm256_loadu_ps(aPtr);
aPtr += 8;
cVal3 = _mm256_dp_ps(aVal3, aVal3, 0xF4);
aVal4 = _mm256_loadu_ps(aPtr);
aPtr += 8;
cVal4 = _mm256_dp_ps(aVal4, aVal4, 0xF8);
cVal1 = _mm256_or_ps(cVal1, cVal2);
cVal3 = _mm256_or_ps(cVal3, cVal4);
cVal1 = _mm256_or_ps(cVal1, cVal3);
squareAccumulator =
_mm256_add_ps(squareAccumulator, cVal1); // squareAccumulator += x^2
}
_mm256_storeu_ps(
squareBuffer,
squareAccumulator); // Store the results back into the C container
stdDev = squareBuffer[0];
stdDev += squareBuffer[1];
stdDev += squareBuffer[2];
stdDev += squareBuffer[3];
stdDev += squareBuffer[4];
stdDev += squareBuffer[5];
stdDev += squareBuffer[6];
stdDev += squareBuffer[7];
number = thirtySecondthPoints * 32;
for (; number < num_points; number++) {
stdDev += (*aPtr) * (*aPtr);
aPtr++;
}
stdDev /= num_points;
stdDev -= (mean * mean);
stdDev = sqrtf(stdDev);
}
*stddev = stdDev;
}
#endif /* LV_HAVE_AVX */
#ifdef LV_HAVE_RVV
#include <riscv_vector.h>
#include <volk/volk_rvv_intrinsics.h>
static inline void volk_32f_s32f_stddev_32f_rvv(float* stddev,
const float* inputBuffer,
const float mean,
unsigned int num_points)
{
if (num_points == 0) {
*stddev = 0;
return;
}
vfloat32m8_t vsum = __riscv_vfmv_v_f_f32m8(0, __riscv_vsetvlmax_e32m8());
size_t n = num_points;
for (size_t vl; n > 0; n -= vl, inputBuffer += vl) {
vl = __riscv_vsetvl_e32m8(n);
vfloat32m8_t v = __riscv_vle32_v_f32m8(inputBuffer, vl);
vsum = __riscv_vfmacc_tu(vsum, v, v, vl);
}
size_t vl = __riscv_vsetvlmax_e32m1();
vfloat32m1_t v = RISCV_SHRINK8(vfadd, f, 32, vsum);
v = __riscv_vfredusum(v, __riscv_vfmv_s_f_f32m1(0, vl), vl);
float sum = __riscv_vfmv_f(v);
*stddev = sqrtf((sum / num_points) - (mean * mean));
}
#endif /*LV_HAVE_RVV*/
#endif /* INCLUDED_volk_32f_s32f_stddev_32f_u_H */