volk_32f_x2_interleave_32fc.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_x2_interleave_32fc_a_H
#define INCLUDED_volk_32f_x2_interleave_32fc_a_H
 
#include <inttypes.h>
#include <stdio.h>
 
#ifdef LV_HAVE_AVX
#include <immintrin.h>
 
static inline void volk_32f_x2_interleave_32fc_a_avx(lv_32fc_t* complexVector,
                                                     const float* iBuffer,
                                                     const float* qBuffer,
                                                     unsigned int num_points)
{
    unsigned int number = 0;
    float* complexVectorPtr = (float*)complexVector;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
 
    const uint64_t eighthPoints = num_points / 8;
 
    __m256 iValue, qValue, cplxValue1, cplxValue2, cplxValue;
    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);
        // Interleaves the upper two values in the i and q variables into one buffer
        cplxValue2 = _mm256_unpackhi_ps(iValue, qValue);
 
        cplxValue = _mm256_permute2f128_ps(cplxValue1, cplxValue2, 0x20);
        _mm256_store_ps(complexVectorPtr, cplxValue);
        complexVectorPtr += 8;
 
        cplxValue = _mm256_permute2f128_ps(cplxValue1, cplxValue2, 0x31);
        _mm256_store_ps(complexVectorPtr, cplxValue);
        complexVectorPtr += 8;
 
        iBufferPtr += 8;
        qBufferPtr += 8;
    }
 
    number = eighthPoints * 8;
    for (; number < num_points; number++) {
        *complexVectorPtr++ = *iBufferPtr++;
        *complexVectorPtr++ = *qBufferPtr++;
    }
}
 
#endif /* LV_HAV_AVX */
 
#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
 
static inline void volk_32f_x2_interleave_32fc_a_sse(lv_32fc_t* complexVector,
                                                     const float* iBuffer,
                                                     const float* qBuffer,
                                                     unsigned int num_points)
{
    unsigned int number = 0;
    float* complexVectorPtr = (float*)complexVector;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
 
    const uint64_t quarterPoints = num_points / 4;
 
    __m128 iValue, qValue, cplxValue;
    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);
        _mm_store_ps(complexVectorPtr, cplxValue);
        complexVectorPtr += 4;
 
        // Interleaves the upper two values in the i and q variables into one buffer
        cplxValue = _mm_unpackhi_ps(iValue, qValue);
        _mm_store_ps(complexVectorPtr, cplxValue);
        complexVectorPtr += 4;
 
        iBufferPtr += 4;
        qBufferPtr += 4;
    }
 
    number = quarterPoints * 4;
    for (; number < num_points; number++) {
        *complexVectorPtr++ = *iBufferPtr++;
        *complexVectorPtr++ = *qBufferPtr++;
    }
}
#endif /* LV_HAVE_SSE */
 
 
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
 
static inline void volk_32f_x2_interleave_32fc_neon(lv_32fc_t* complexVector,
                                                    const float* iBuffer,
                                                    const float* qBuffer,
                                                    unsigned int num_points)
{
    unsigned int quarter_points = num_points / 4;
    unsigned int number;
    float* complexVectorPtr = (float*)complexVector;
 
    float32x4x2_t complex_vec;
    for (number = 0; number < quarter_points; ++number) {
        complex_vec.val[0] = vld1q_f32(iBuffer);
        complex_vec.val[1] = vld1q_f32(qBuffer);
        vst2q_f32(complexVectorPtr, complex_vec);
        iBuffer += 4;
        qBuffer += 4;
        complexVectorPtr += 8;
    }
 
    for (number = quarter_points * 4; number < num_points; ++number) {
        *complexVectorPtr++ = *iBuffer++;
        *complexVectorPtr++ = *qBuffer++;
    }
}
#endif /* LV_HAVE_NEON */
 
#ifdef LV_HAVE_NEONV8
#include <arm_neon.h>
 
static inline void volk_32f_x2_interleave_32fc_neonv8(lv_32fc_t* complexVector,
                                                      const float* iBuffer,
                                                      const float* qBuffer,
                                                      unsigned int num_points)
{
    const unsigned int eighthPoints = num_points / 8;
 
    float* outPtr = (float*)complexVector;
    const float* iPtr = iBuffer;
    const float* qPtr = qBuffer;
 
    for (unsigned int number = 0; number < eighthPoints; number++) {
        float32x4x2_t cplx0, cplx1;
        cplx0.val[0] = vld1q_f32(iPtr);
        cplx0.val[1] = vld1q_f32(qPtr);
        cplx1.val[0] = vld1q_f32(iPtr + 4);
        cplx1.val[1] = vld1q_f32(qPtr + 4);
        __VOLK_PREFETCH(iPtr + 16);
        __VOLK_PREFETCH(qPtr + 16);
 
        vst2q_f32(outPtr, cplx0);
        vst2q_f32(outPtr + 8, cplx1);
 
        iPtr += 8;
        qPtr += 8;
        outPtr += 16;
    }
 
    for (unsigned int number = eighthPoints * 8; number < num_points; number++) {
        *outPtr++ = *iPtr++;
        *outPtr++ = *qPtr++;
    }
}
#endif /* LV_HAVE_NEONV8 */
 
 
#ifdef LV_HAVE_GENERIC
 
static inline void volk_32f_x2_interleave_32fc_generic(lv_32fc_t* complexVector,
                                                       const float* iBuffer,
                                                       const float* qBuffer,
                                                       unsigned int num_points)
{
    float* complexVectorPtr = (float*)complexVector;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
    unsigned int number;
 
    for (number = 0; number < num_points; number++) {
        *complexVectorPtr++ = *iBufferPtr++;
        *complexVectorPtr++ = *qBufferPtr++;
    }
}
#endif /* LV_HAVE_GENERIC */
 
 
#endif /* INCLUDED_volk_32f_x2_interleave_32fc_a_H */
 
#ifndef INCLUDED_volk_32f_x2_interleave_32fc_u_H
#define INCLUDED_volk_32f_x2_interleave_32fc_u_H
 
#include <inttypes.h>
#include <stdio.h>
 
#ifdef LV_HAVE_AVX
#include <immintrin.h>
 
static inline void volk_32f_x2_interleave_32fc_u_avx(lv_32fc_t* complexVector,
                                                     const float* iBuffer,
                                                     const float* qBuffer,
                                                     unsigned int num_points)
{
    unsigned int number = 0;
    float* complexVectorPtr = (float*)complexVector;
    const float* iBufferPtr = iBuffer;
    const float* qBufferPtr = qBuffer;
 
    const uint64_t eighthPoints = num_points / 8;
 
    __m256 iValue, qValue, cplxValue1, cplxValue2, cplxValue;
    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);
        // Interleaves the upper two values in the i and q variables into one buffer
        cplxValue2 = _mm256_unpackhi_ps(iValue, qValue);
 
        cplxValue = _mm256_permute2f128_ps(cplxValue1, cplxValue2, 0x20);
        _mm256_storeu_ps(complexVectorPtr, cplxValue);
        complexVectorPtr += 8;
 
        cplxValue = _mm256_permute2f128_ps(cplxValue1, cplxValue2, 0x31);
        _mm256_storeu_ps(complexVectorPtr, cplxValue);
        complexVectorPtr += 8;
 
        iBufferPtr += 8;
        qBufferPtr += 8;
    }
 
    number = eighthPoints * 8;
    for (; number < num_points; number++) {
        *complexVectorPtr++ = *iBufferPtr++;
        *complexVectorPtr++ = *qBufferPtr++;
    }
}
#endif /* LV_HAVE_AVX */
 
#ifdef LV_HAVE_RVV
#include <riscv_vector.h>
 
static inline void volk_32f_x2_interleave_32fc_rvv(lv_32fc_t* complexVector,
                                                   const float* iBuffer,
                                                   const float* qBuffer,
                                                   unsigned int num_points)
{
    uint64_t* out = (uint64_t*)complexVector;
    size_t n = num_points;
    for (size_t vl; n > 0; n -= vl, out += vl, iBuffer += vl, qBuffer += vl) {
        vl = __riscv_vsetvl_e32m4(n);
        vuint32m4_t vr = __riscv_vle32_v_u32m4((const uint32_t*)iBuffer, vl);
        vuint32m4_t vi = __riscv_vle32_v_u32m4((const uint32_t*)qBuffer, vl);
        vuint64m8_t vc =
            __riscv_vwmaccu(__riscv_vwaddu_vv(vr, vi, vl), 0xFFFFFFFF, vi, vl);
        __riscv_vse64(out, vc, vl);
    }
}
#endif /*LV_HAVE_RVV*/
 
#ifdef LV_HAVE_RVVSEG
#include <riscv_vector.h>
 
static inline void volk_32f_x2_interleave_32fc_rvvseg(lv_32fc_t* complexVector,
                                                      const float* iBuffer,
                                                      const float* qBuffer,
                                                      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_e32m4(n);
        vfloat32m4_t vr = __riscv_vle32_v_f32m4(iBuffer, vl);
        vfloat32m4_t vi = __riscv_vle32_v_f32m4(qBuffer, vl);
        __riscv_vsseg2e32((float*)complexVector, __riscv_vcreate_v_f32m4x2(vr, vi), vl);
    }
}
#endif /*LV_HAVE_RVVSEG*/
 
#endif /* INCLUDED_volk_32f_x2_interleave_32fc_u_H */