volk_32f_x2_s32f_interleave_16ic.h

Go to the documentation of this file.

/* -*- 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_x2_s32f_interleave_16ic_a_H
#define INCLUDED_volk_32f_x2_s32f_interleave_16ic_a_H
 
#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_common.h>
 
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_a_avx2(lv_16sc_t* complexVector,
                                                           const float* iBuffer,
                                                           const float* qBuffer,
                                                           const float scalar,
                                                           unsigned int num_points)
{
    unsigned int number = 0;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
 
    __m256 vScalar = _mm256_set1_ps(scalar);
 
    const unsigned int eighthPoints = num_points / 8;
 
    __m256 iValue, qValue, cplxValue1, cplxValue2;
    __m256i intValue1, intValue2;
 
    int16_t* complexVectorPtr = (int16_t*)complexVector;
 
    for (; number < eighthPoints; number++) {
        iValue = _mm256_load_ps(iBufferPtr);
        qValue = _mm256_load_ps(qBufferPtr);
 
        // Interleaves the lower two values in the i and q variables into one buffer
        cplxValue1 = _mm256_unpacklo_ps(iValue, qValue);
        cplxValue1 = _mm256_mul_ps(cplxValue1, vScalar);
 
        // Interleaves the upper two values in the i and q variables into one buffer
        cplxValue2 = _mm256_unpackhi_ps(iValue, qValue);
        cplxValue2 = _mm256_mul_ps(cplxValue2, vScalar);
 
        intValue1 = _mm256_cvtps_epi32(cplxValue1);
        intValue2 = _mm256_cvtps_epi32(cplxValue2);
 
        intValue1 = _mm256_packs_epi32(intValue1, intValue2);
 
        _mm256_store_si256((__m256i*)complexVectorPtr, intValue1);
        complexVectorPtr += 16;
 
        iBufferPtr += 8;
        qBufferPtr += 8;
    }
 
    number = eighthPoints * 8;
    complexVectorPtr = (int16_t*)(&complexVector[number]);
    for (; number < num_points; number++) {
        *complexVectorPtr++ = (int16_t)rintf(*iBufferPtr++ * scalar);
        *complexVectorPtr++ = (int16_t)rintf(*qBufferPtr++ * scalar);
    }
}
#endif /* LV_HAVE_AVX2 */
 
 
#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_a_sse2(lv_16sc_t* complexVector,
                                                           const float* iBuffer,
                                                           const float* qBuffer,
                                                           const float scalar,
                                                           unsigned int num_points)
{
    unsigned int number = 0;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
 
    __m128 vScalar = _mm_set_ps1(scalar);
 
    const unsigned int quarterPoints = num_points / 4;
 
    __m128 iValue, qValue, cplxValue1, cplxValue2;
    __m128i intValue1, intValue2;
 
    int16_t* complexVectorPtr = (int16_t*)complexVector;
 
    for (; number < quarterPoints; number++) {
        iValue = _mm_load_ps(iBufferPtr);
        qValue = _mm_load_ps(qBufferPtr);
 
        // Interleaves the lower two values in the i and q variables into one buffer
        cplxValue1 = _mm_unpacklo_ps(iValue, qValue);
        cplxValue1 = _mm_mul_ps(cplxValue1, vScalar);
 
        // Interleaves the upper two values in the i and q variables into one buffer
        cplxValue2 = _mm_unpackhi_ps(iValue, qValue);
        cplxValue2 = _mm_mul_ps(cplxValue2, vScalar);
 
        intValue1 = _mm_cvtps_epi32(cplxValue1);
        intValue2 = _mm_cvtps_epi32(cplxValue2);
 
        intValue1 = _mm_packs_epi32(intValue1, intValue2);
 
        _mm_store_si128((__m128i*)complexVectorPtr, intValue1);
        complexVectorPtr += 8;
 
        iBufferPtr += 4;
        qBufferPtr += 4;
    }
 
    number = quarterPoints * 4;
    complexVectorPtr = (int16_t*)(&complexVector[number]);
    for (; number < num_points; number++) {
        *complexVectorPtr++ = (int16_t)rintf(*iBufferPtr++ * scalar);
        *complexVectorPtr++ = (int16_t)rintf(*qBufferPtr++ * scalar);
    }
}
#endif /* LV_HAVE_SSE2 */
 
 
#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_a_sse(lv_16sc_t* complexVector,
                                                          const float* iBuffer,
                                                          const float* qBuffer,
                                                          const float scalar,
                                                          unsigned int num_points)
{
    unsigned int number = 0;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
 
    __m128 vScalar = _mm_set_ps1(scalar);
 
    const unsigned int quarterPoints = num_points / 4;
 
    __m128 iValue, qValue, cplxValue;
 
    int16_t* complexVectorPtr = (int16_t*)complexVector;
 
    __VOLK_ATTR_ALIGNED(16) float floatBuffer[4];
 
    for (; number < quarterPoints; number++) {
        iValue = _mm_load_ps(iBufferPtr);
        qValue = _mm_load_ps(qBufferPtr);
 
        // Interleaves the lower two values in the i and q variables into one buffer
        cplxValue = _mm_unpacklo_ps(iValue, qValue);
        cplxValue = _mm_mul_ps(cplxValue, vScalar);
 
        _mm_store_ps(floatBuffer, cplxValue);
 
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[0]);
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[1]);
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[2]);
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[3]);
 
        // Interleaves the upper two values in the i and q variables into one buffer
        cplxValue = _mm_unpackhi_ps(iValue, qValue);
        cplxValue = _mm_mul_ps(cplxValue, vScalar);
 
        _mm_store_ps(floatBuffer, cplxValue);
 
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[0]);
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[1]);
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[2]);
        *complexVectorPtr++ = (int16_t)rintf(floatBuffer[3]);
 
        iBufferPtr += 4;
        qBufferPtr += 4;
    }
 
    number = quarterPoints * 4;
    complexVectorPtr = (int16_t*)(&complexVector[number]);
    for (; number < num_points; number++) {
        *complexVectorPtr++ = (int16_t)rintf(*iBufferPtr++ * scalar);
        *complexVectorPtr++ = (int16_t)rintf(*qBufferPtr++ * scalar);
    }
}
#endif /* LV_HAVE_SSE */
 
 
#ifdef LV_HAVE_GENERIC
 
static inline void volk_32f_x2_s32f_interleave_16ic_generic(lv_16sc_t* complexVector,
                                                            const float* iBuffer,
                                                            const float* qBuffer,
                                                            const float scalar,
                                                            unsigned int num_points)
{
    int16_t* complexVectorPtr = (int16_t*)complexVector;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
    unsigned int number = 0;
 
    for (number = 0; number < num_points; number++) {
        *complexVectorPtr++ = (int16_t)rintf(*iBufferPtr++ * scalar);
        *complexVectorPtr++ = (int16_t)rintf(*qBufferPtr++ * scalar);
    }
}
#endif /* LV_HAVE_GENERIC */
 
 
#endif /* INCLUDED_volk_32f_x2_s32f_interleave_16ic_a_H */
 
#ifndef INCLUDED_volk_32f_x2_s32f_interleave_16ic_u_H
#define INCLUDED_volk_32f_x2_s32f_interleave_16ic_u_H
 
#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_common.h>
 
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_u_avx2(lv_16sc_t* complexVector,
                                                           const float* iBuffer,
                                                           const float* qBuffer,
                                                           const float scalar,
                                                           unsigned int num_points)
{
    unsigned int number = 0;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
 
    __m256 vScalar = _mm256_set1_ps(scalar);
 
    const unsigned int eighthPoints = num_points / 8;
 
    __m256 iValue, qValue, cplxValue1, cplxValue2;
    __m256i intValue1, intValue2;
 
    int16_t* complexVectorPtr = (int16_t*)complexVector;
 
    for (; number < eighthPoints; number++) {
        iValue = _mm256_loadu_ps(iBufferPtr);
        qValue = _mm256_loadu_ps(qBufferPtr);
 
        // Interleaves the lower two values in the i and q variables into one buffer
        cplxValue1 = _mm256_unpacklo_ps(iValue, qValue);
        cplxValue1 = _mm256_mul_ps(cplxValue1, vScalar);
 
        // Interleaves the upper two values in the i and q variables into one buffer
        cplxValue2 = _mm256_unpackhi_ps(iValue, qValue);
        cplxValue2 = _mm256_mul_ps(cplxValue2, vScalar);
 
        intValue1 = _mm256_cvtps_epi32(cplxValue1);
        intValue2 = _mm256_cvtps_epi32(cplxValue2);
 
        intValue1 = _mm256_packs_epi32(intValue1, intValue2);
 
        _mm256_storeu_si256((__m256i*)complexVectorPtr, intValue1);
        complexVectorPtr += 16;
 
        iBufferPtr += 8;
        qBufferPtr += 8;
    }
 
    number = eighthPoints * 8;
    complexVectorPtr = (int16_t*)(&complexVector[number]);
    for (; number < num_points; number++) {
        *complexVectorPtr++ = (int16_t)rintf(*iBufferPtr++ * scalar);
        *complexVectorPtr++ = (int16_t)rintf(*qBufferPtr++ * scalar);
    }
}
#endif /* LV_HAVE_AVX2 */
 
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_neon(lv_16sc_t* complexVector,
                                                         const float* iBuffer,
                                                         const float* qBuffer,
                                                         const float scalar,
                                                         unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int quarter_points = num_points / 4;
 
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
    int16_t* complexVectorPtr = (int16_t*)complexVector;
 
    float32x4_t vScalar = vdupq_n_f32(scalar);
    float32x4_t half = vdupq_n_f32(0.5f);
    float32x4_t neg_half = vdupq_n_f32(-0.5f);
    float32x4_t zero = vdupq_n_f32(0.0f);
 
    for (; number < quarter_points; number++) {
        float32x4_t iValue = vld1q_f32(iBufferPtr);
        float32x4_t qValue = vld1q_f32(qBufferPtr);
 
        iValue = vmulq_f32(iValue, vScalar);
        qValue = vmulq_f32(qValue, vScalar);
 
        // Round to nearest: add copysign(0.5, x) before truncating
        uint32x4_t iNeg = vcltq_f32(iValue, zero);
        uint32x4_t qNeg = vcltq_f32(qValue, zero);
        iValue = vaddq_f32(iValue, vbslq_f32(iNeg, neg_half, half));
        qValue = vaddq_f32(qValue, vbslq_f32(qNeg, neg_half, half));
 
        int32x4_t iInt = vcvtq_s32_f32(iValue);
        int32x4_t qInt = vcvtq_s32_f32(qValue);
 
        int16x4_t iShort = vqmovn_s32(iInt);
        int16x4_t qShort = vqmovn_s32(qInt);
 
        int16x4x2_t interleaved;
        interleaved.val[0] = iShort;
        interleaved.val[1] = qShort;
        vst2_s16(complexVectorPtr, interleaved);
 
        complexVectorPtr += 8;
        iBufferPtr += 4;
        qBufferPtr += 4;
    }
 
    number = quarter_points * 4;
    complexVectorPtr = (int16_t*)(&complexVector[number]);
    for (; number < num_points; number++) {
        *complexVectorPtr++ = (int16_t)rintf(*iBufferPtr++ * scalar);
        *complexVectorPtr++ = (int16_t)rintf(*qBufferPtr++ * scalar);
    }
}
#endif /* LV_HAVE_NEON */
 
#ifdef LV_HAVE_NEONV8
#include <arm_neon.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_neonv8(lv_16sc_t* complexVector,
                                                           const float* iBuffer,
                                                           const float* qBuffer,
                                                           const float scalar,
                                                           unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int eighth_points = num_points / 8;
 
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
    int16_t* complexVectorPtr = (int16_t*)complexVector;
 
    float32x4_t vScalar = vdupq_n_f32(scalar);
 
    for (; number < eighth_points; number++) {
        float32x4_t iValue0 = vld1q_f32(iBufferPtr);
        float32x4_t iValue1 = vld1q_f32(iBufferPtr + 4);
        float32x4_t qValue0 = vld1q_f32(qBufferPtr);
        float32x4_t qValue1 = vld1q_f32(qBufferPtr + 4);
        __VOLK_PREFETCH(iBufferPtr + 8);
        __VOLK_PREFETCH(qBufferPtr + 8);
 
        iValue0 = vmulq_f32(iValue0, vScalar);
        iValue1 = vmulq_f32(iValue1, vScalar);
        qValue0 = vmulq_f32(qValue0, vScalar);
        qValue1 = vmulq_f32(qValue1, vScalar);
 
        int32x4_t iInt0 = vcvtnq_s32_f32(iValue0);
        int32x4_t iInt1 = vcvtnq_s32_f32(iValue1);
        int32x4_t qInt0 = vcvtnq_s32_f32(qValue0);
        int32x4_t qInt1 = vcvtnq_s32_f32(qValue1);
 
        int16x4_t iShort0 = vqmovn_s32(iInt0);
        int16x4_t iShort1 = vqmovn_s32(iInt1);
        int16x4_t qShort0 = vqmovn_s32(qInt0);
        int16x4_t qShort1 = vqmovn_s32(qInt1);
 
        int16x4x2_t interleaved0, interleaved1;
        interleaved0.val[0] = iShort0;
        interleaved0.val[1] = qShort0;
        interleaved1.val[0] = iShort1;
        interleaved1.val[1] = qShort1;
 
        vst2_s16(complexVectorPtr, interleaved0);
        vst2_s16(complexVectorPtr + 8, interleaved1);
 
        complexVectorPtr += 16;
        iBufferPtr += 8;
        qBufferPtr += 8;
    }
 
    number = eighth_points * 8;
    complexVectorPtr = (int16_t*)(&complexVector[number]);
    for (; number < num_points; number++) {
        *complexVectorPtr++ = (int16_t)rintf(*iBufferPtr++ * scalar);
        *complexVectorPtr++ = (int16_t)rintf(*qBufferPtr++ * scalar);
    }
}
#endif /* LV_HAVE_NEONV8 */
 
#ifdef LV_HAVE_RVV
#include <riscv_vector.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_rvv(lv_16sc_t* complexVector,
                                                        const float* iBuffer,
                                                        const float* qBuffer,
                                                        const float scalar,
                                                        unsigned int num_points)
{
    uint32_t* out = (uint32_t*)complexVector;
    size_t n = num_points;
    for (size_t vl; n > 0; n -= vl, out += vl, iBuffer += vl, qBuffer += vl) {
        vl = __riscv_vsetvl_e32m8(n);
        vfloat32m8_t vrf = __riscv_vle32_v_f32m8(iBuffer, vl);
        vfloat32m8_t vif = __riscv_vle32_v_f32m8(qBuffer, vl);
        vint16m4_t vri = __riscv_vfncvt_x(__riscv_vfmul(vrf, scalar, vl), vl);
        vint16m4_t vii = __riscv_vfncvt_x(__riscv_vfmul(vif, scalar, vl), vl);
        vuint16m4_t vr = __riscv_vreinterpret_u16m4(vri);
        vuint16m4_t vi = __riscv_vreinterpret_u16m4(vii);
        vuint32m8_t vc = __riscv_vwmaccu(__riscv_vwaddu_vv(vr, vi, vl), 0xFFFF, vi, vl);
        __riscv_vse32(out, vc, vl);
    }
}
#endif /*LV_HAVE_RVV*/
 
#ifdef LV_HAVE_RVVSEG
#include <riscv_vector.h>
 
static inline void volk_32f_x2_s32f_interleave_16ic_rvvseg(lv_16sc_t* complexVector,
                                                           const float* iBuffer,
                                                           const float* qBuffer,
                                                           const float scalar,
                                                           unsigned int num_points)
{
    size_t n = num_points;
    for (size_t vl; n > 0; n -= vl, complexVector += vl, iBuffer += vl, qBuffer += vl) {
        vl = __riscv_vsetvl_e32m8(n);
        vfloat32m8_t vrf = __riscv_vle32_v_f32m8(iBuffer, vl);
        vfloat32m8_t vif = __riscv_vle32_v_f32m8(qBuffer, vl);
        vint16m4_t vri = __riscv_vfncvt_x(__riscv_vfmul(vrf, scalar, vl), vl);
        vint16m4_t vii = __riscv_vfncvt_x(__riscv_vfmul(vif, scalar, vl), vl);
        __riscv_vsseg2e16(
            (int16_t*)complexVector, __riscv_vcreate_v_i16m4x2(vri, vii), vl);
    }
}
#endif /*LV_HAVE_RVVSEG*/
 
#endif /* INCLUDED_volk_32f_x2_s32f_interleave_16ic_u_H */