/* -*- c++ -*- */
/*
 * Copyright 2020 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_32f_s32f_add_32f
 *
 * \b Overview
 *
 * Adds a floating point scalar to a floating point vector.
 *
 * <b>Dispatcher Prototype</b>
 * \code
 * void volk_32f_s32f_add_32f(float* cVector, const float* aVector, const float scalar,
 * unsigned int num_points) \endcode
 *
 * \b Inputs
 * \li aVector: The input vector of floats.
 * \li scalar: the scalar value to add against \p aVector.
 * \li num_points: The number of data points.
 *
 * \b Outputs
 * \li cVector: The output vector of floats.
 *
 * \b Example
 * \code
 *  int N = 10;
 *   unsigned int alignment = volk_get_alignment();
 *   float* increasing = (float*)volk_malloc(sizeof(float)*N, alignment);
 *   float* out = (float*)volk_malloc(sizeof(float)*N, alignment);
 *
 *   for(unsigned int ii = 0; ii < N; ++ii){
 *       increasing[ii] = 2.f * ((float)ii / (float)N) - 1.f;
 *   }
 *
 *   // Add addshift to each entry.
 *   float addshift = 5.0f;
 *
 *   volk_32f_s32f_add_32f(out, increasing, addshift, N);
 *
 *   for(unsigned int ii = 0; ii < N; ++ii){
 *       printf("out[%u] = %f\n", ii, out[ii]);
 *   }
 *
 *   volk_free(increasing);
 *   volk_free(out);
 * \endcode
 */

#include <inttypes.h>
#include <stdio.h>

#ifdef LV_HAVE_GENERIC

static inline void volk_32f_s32f_add_32f_generic(float* cVector,
                                                 const float* aVector,
                                                 const float scalar,
                                                 unsigned int num_points)
{
    unsigned int number = 0;
    const float* inputPtr = aVector;
    float* outputPtr = cVector;
    for (number = 0; number < num_points; number++) {
        *outputPtr = (*inputPtr) + scalar;
        inputPtr++;
        outputPtr++;
    }
}

#endif /* LV_HAVE_GENERIC */
#ifndef INCLUDED_volk_32f_s32f_add_32f_u_H
#define INCLUDED_volk_32f_s32f_add_32f_u_H

#ifdef LV_HAVE_SSE
#include <xmmintrin.h>

static inline void volk_32f_s32f_add_32f_u_sse(float* cVector,
                                               const float* aVector,
                                               const float scalar,
                                               unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int quarterPoints = num_points / 4;

    float* cPtr = cVector;
    const float* aPtr = aVector;

    __m128 aVal, bVal, cVal;
    bVal = _mm_set_ps1(scalar);
    for (; number < quarterPoints; number++) {
        aVal = _mm_loadu_ps(aPtr);

        cVal = _mm_add_ps(aVal, bVal);

        _mm_storeu_ps(cPtr, cVal); // Store the results back into the C container

        aPtr += 4;
        cPtr += 4;
    }

    number = quarterPoints * 4;
    volk_32f_s32f_add_32f_generic(cPtr, aPtr, scalar, num_points - number);
}
#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_AVX
#include <immintrin.h>

static inline void volk_32f_s32f_add_32f_u_avx(float* cVector,
                                               const float* aVector,
                                               const float scalar,
                                               unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int eighthPoints = num_points / 8;

    float* cPtr = cVector;
    const float* aPtr = aVector;

    __m256 aVal, bVal, cVal;
    bVal = _mm256_set1_ps(scalar);
    for (; number < eighthPoints; number++) {

        aVal = _mm256_loadu_ps(aPtr);

        cVal = _mm256_add_ps(aVal, bVal);

        _mm256_storeu_ps(cPtr, cVal); // Store the results back into the C container

        aPtr += 8;
        cPtr += 8;
    }

    number = eighthPoints * 8;
    volk_32f_s32f_add_32f_generic(cPtr, aPtr, scalar, num_points - number);
}
#endif /* LV_HAVE_AVX */

#ifdef LV_HAVE_NEON
#include <arm_neon.h>

static inline void volk_32f_s32f_add_32f_u_neon(float* cVector,
                                                const float* aVector,
                                                const float scalar,
                                                unsigned int num_points)
{
    unsigned int number = 0;
    const float* inputPtr = aVector;
    float* outputPtr = cVector;
    const unsigned int quarterPoints = num_points / 4;

    float32x4_t aVal, cVal, scalarvec;

    scalarvec = vdupq_n_f32(scalar);

    for (number = 0; number < quarterPoints; number++) {
        aVal = vld1q_f32(inputPtr);        // Load into NEON regs
        cVal = vaddq_f32(aVal, scalarvec); // Do the add
        vst1q_f32(outputPtr, cVal);        // Store results back to output
        inputPtr += 4;
        outputPtr += 4;
    }

    number = quarterPoints * 4;
    volk_32f_s32f_add_32f_generic(outputPtr, inputPtr, scalar, num_points - number);
}
#endif /* LV_HAVE_NEON */


#endif /* INCLUDED_volk_32f_s32f_add_32f_u_H */


#ifndef INCLUDED_volk_32f_s32f_add_32f_a_H
#define INCLUDED_volk_32f_s32f_add_32f_a_H

#ifdef LV_HAVE_SSE
#include <xmmintrin.h>

static inline void volk_32f_s32f_add_32f_a_sse(float* cVector,
                                               const float* aVector,
                                               const float scalar,
                                               unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int quarterPoints = num_points / 4;

    float* cPtr = cVector;
    const float* aPtr = aVector;

    __m128 aVal, bVal, cVal;
    bVal = _mm_set_ps1(scalar);
    for (; number < quarterPoints; number++) {
        aVal = _mm_load_ps(aPtr);

        cVal = _mm_add_ps(aVal, bVal);

        _mm_store_ps(cPtr, cVal); // Store the results back into the C container

        aPtr += 4;
        cPtr += 4;
    }

    number = quarterPoints * 4;
    volk_32f_s32f_add_32f_generic(cPtr, aPtr, scalar, num_points - number);
}
#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_AVX
#include <immintrin.h>

static inline void volk_32f_s32f_add_32f_a_avx(float* cVector,
                                               const float* aVector,
                                               const float scalar,
                                               unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int eighthPoints = num_points / 8;

    float* cPtr = cVector;
    const float* aPtr = aVector;

    __m256 aVal, bVal, cVal;
    bVal = _mm256_set1_ps(scalar);
    for (; number < eighthPoints; number++) {
        aVal = _mm256_load_ps(aPtr);

        cVal = _mm256_add_ps(aVal, bVal);

        _mm256_store_ps(cPtr, cVal); // Store the results back into the C container

        aPtr += 8;
        cPtr += 8;
    }

    number = eighthPoints * 8;
    volk_32f_s32f_add_32f_generic(cPtr, aPtr, scalar, num_points - number);
}
#endif /* LV_HAVE_AVX */

#ifdef LV_HAVE_ORC

extern void volk_32f_s32f_add_32f_a_orc_impl(float* dst,
                                             const float* src,
                                             const float scalar,
                                             unsigned int num_points);

static inline void volk_32f_s32f_add_32f_u_orc(float* cVector,
                                               const float* aVector,
                                               const float scalar,
                                               unsigned int num_points)
{
    volk_32f_s32f_add_32f_a_orc_impl(cVector, aVector, scalar, num_points);
}
#endif /* LV_HAVE_ORC */

#endif /* INCLUDED_volk_32f_s32f_add_32f_a_H */
