volk_32f_sqrt_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_sqrt_32f_a_H
#define INCLUDED_volk_32f_sqrt_32f_a_H
 
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
 
#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
 
static inline void
volk_32f_sqrt_32f_a_sse(float* cVector, const float* aVector, unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int quarterPoints = num_points / 4;
 
    float* cPtr = cVector;
    const float* aPtr = aVector;
 
    __m128 aVal, cVal;
    for (; number < quarterPoints; number++) {
        aVal = _mm_load_ps(aPtr);
 
        cVal = _mm_sqrt_ps(aVal);
 
        _mm_store_ps(cPtr, cVal); // Store the results back into the C container
 
        aPtr += 4;
        cPtr += 4;
    }
 
    number = quarterPoints * 4;
    for (; number < num_points; number++) {
        *cPtr++ = sqrtf(*aPtr++);
    }
}
 
#endif /* LV_HAVE_SSE */
 
#ifdef LV_HAVE_AVX
#include <immintrin.h>
 
static inline void
volk_32f_sqrt_32f_a_avx(float* cVector, const float* aVector, unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int eighthPoints = num_points / 8;
 
    float* cPtr = cVector;
    const float* aPtr = aVector;
 
    __m256 aVal, cVal;
    for (; number < eighthPoints; number++) {
        aVal = _mm256_load_ps(aPtr);
 
        cVal = _mm256_sqrt_ps(aVal);
 
        _mm256_store_ps(cPtr, cVal); // Store the results back into the C container
 
        aPtr += 8;
        cPtr += 8;
    }
 
    number = eighthPoints * 8;
    for (; number < num_points; number++) {
        *cPtr++ = sqrtf(*aPtr++);
    }
}
 
#endif /* LV_HAVE_AVX */
 
 
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
 
static inline void
volk_32f_sqrt_32f_neon(float* cVector, const float* aVector, unsigned int num_points)
{
    float* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;
    unsigned int quarter_points = num_points / 4;
    float32x4_t in_vec, out_vec;
 
    for (number = 0; number < quarter_points; number++) {
        in_vec = vld1q_f32(aPtr);
        // note that armv8 has vsqrt_f32 which will be much better
        out_vec = vrecpeq_f32(vrsqrteq_f32(in_vec));
        vst1q_f32(cPtr, out_vec);
        aPtr += 4;
        cPtr += 4;
    }
 
    for (number = quarter_points * 4; number < num_points; number++) {
        *cPtr++ = sqrtf(*aPtr++);
    }
}
 
#endif /* LV_HAVE_NEON */
 
 
#ifdef LV_HAVE_GENERIC
 
static inline void
volk_32f_sqrt_32f_generic(float* cVector, const float* aVector, unsigned int num_points)
{
    float* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;
 
    for (number = 0; number < num_points; number++) {
        *cPtr++ = sqrtf(*aPtr++);
    }
}
 
#endif /* LV_HAVE_GENERIC */
 
 
#ifdef LV_HAVE_ORC
 
extern void volk_32f_sqrt_32f_a_orc_impl(float*, const float*, unsigned int);
 
static inline void
volk_32f_sqrt_32f_u_orc(float* cVector, const float* aVector, unsigned int num_points)
{
    volk_32f_sqrt_32f_a_orc_impl(cVector, aVector, num_points);
}
 
#endif /* LV_HAVE_ORC */
 
#endif /* INCLUDED_volk_32f_sqrt_32f_a_H */
 
#ifndef INCLUDED_volk_32f_sqrt_32f_u_H
#define INCLUDED_volk_32f_sqrt_32f_u_H
 
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
#ifdef LV_HAVE_AVX
#include <immintrin.h>
 
static inline void
volk_32f_sqrt_32f_u_avx(float* cVector, const float* aVector, unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int eighthPoints = num_points / 8;
 
    float* cPtr = cVector;
    const float* aPtr = aVector;
 
    __m256 aVal, cVal;
    for (; number < eighthPoints; number++) {
        aVal = _mm256_loadu_ps(aPtr);
 
        cVal = _mm256_sqrt_ps(aVal);
 
        _mm256_storeu_ps(cPtr, cVal); // Store the results back into the C container
 
        aPtr += 8;
        cPtr += 8;
    }
 
    number = eighthPoints * 8;
    for (; number < num_points; number++) {
        *cPtr++ = sqrtf(*aPtr++);
    }
}
 
#endif /* LV_HAVE_AVX */
#endif /* INCLUDED_volk_32f_sqrt_32f_u_H */