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volk_32fc_x2_multiply_conjugate_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_32fc_x2_multiply_conjugate_32fc_u_H
#define INCLUDED_volk_32fc_x2_multiply_conjugate_32fc_u_H
#include <float.h>
#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
#ifdef LV_HAVE_AVX
#include <immintrin.h>
#include <volk/volk_avx_intrinsics.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_u_avx(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
__m256 x, y, z;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
const lv_32fc_t* b = bVector;
for (; number < quarterPoints; number++) {
x = _mm256_loadu_ps(
(float*)a); // Load the ar + ai, br + bi ... as ar,ai,br,bi ...
y = _mm256_loadu_ps(
(float*)b); // Load the cr + ci, dr + di ... as cr,ci,dr,di ...
z = _mm256_complexconjugatemul_ps(x, y);
_mm256_storeu_ps((float*)c, z); // Store the results back into the C container
a += 4;
b += 4;
c += 4;
}
number = quarterPoints * 4;
for (; number < num_points; number++) {
*c++ = (*a++) * lv_conj(*b++);
}
}
#endif /* LV_HAVE_AVX */
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
#include <volk/volk_sse3_intrinsics.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_u_sse3(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int halfPoints = num_points / 2;
__m128 x, y, z;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
const lv_32fc_t* b = bVector;
for (; number < halfPoints; number++) {
x = _mm_loadu_ps((float*)a); // Load the ar + ai, br + bi as ar,ai,br,bi
y = _mm_loadu_ps((float*)b); // Load the cr + ci, dr + di as cr,ci,dr,di
z = _mm_complexconjugatemul_ps(x, y);
_mm_storeu_ps((float*)c, z); // Store the results back into the C container
a += 2;
b += 2;
c += 2;
}
if ((num_points % 2) != 0) {
*c = (*a) * lv_conj(*b);
}
}
#endif /* LV_HAVE_SSE */
#ifdef LV_HAVE_GENERIC
static inline void volk_32fc_x2_multiply_conjugate_32fc_generic(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
lv_32fc_t* cPtr = cVector;
const lv_32fc_t* aPtr = aVector;
const lv_32fc_t* bPtr = bVector;
unsigned int number = 0;
for (number = 0; number < num_points; number++) {
*cPtr++ = (*aPtr++) * lv_conj(*bPtr++);
}
}
#endif /* LV_HAVE_GENERIC */
#endif /* INCLUDED_volk_32fc_x2_multiply_conjugate_32fc_u_H */
#ifndef INCLUDED_volk_32fc_x2_multiply_conjugate_32fc_a_H
#define INCLUDED_volk_32fc_x2_multiply_conjugate_32fc_a_H
#include <float.h>
#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
#ifdef LV_HAVE_AVX
#include <immintrin.h>
#include <volk/volk_avx_intrinsics.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_a_avx(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
__m256 x, y, z;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
const lv_32fc_t* b = bVector;
for (; number < quarterPoints; number++) {
x = _mm256_load_ps((float*)a); // Load the ar + ai, br + bi ... as ar,ai,br,bi ...
y = _mm256_load_ps((float*)b); // Load the cr + ci, dr + di ... as cr,ci,dr,di ...
z = _mm256_complexconjugatemul_ps(x, y);
_mm256_store_ps((float*)c, z); // Store the results back into the C container
a += 4;
b += 4;
c += 4;
}
number = quarterPoints * 4;
for (; number < num_points; number++) {
*c++ = (*a++) * lv_conj(*b++);
}
}
#endif /* LV_HAVE_AVX */
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
#include <volk/volk_sse3_intrinsics.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_a_sse3(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int halfPoints = num_points / 2;
__m128 x, y, z;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
const lv_32fc_t* b = bVector;
for (; number < halfPoints; number++) {
x = _mm_load_ps((float*)a); // Load the ar + ai, br + bi as ar,ai,br,bi
y = _mm_load_ps((float*)b); // Load the cr + ci, dr + di as cr,ci,dr,di
z = _mm_complexconjugatemul_ps(x, y);
_mm_store_ps((float*)c, z); // Store the results back into the C container
a += 2;
b += 2;
c += 2;
}
if ((num_points % 2) != 0) {
*c = (*a) * lv_conj(*b);
}
}
#endif /* LV_HAVE_SSE */
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_neon(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
lv_32fc_t* a_ptr = (lv_32fc_t*)aVector;
lv_32fc_t* b_ptr = (lv_32fc_t*)bVector;
unsigned int quarter_points = num_points / 4;
float32x4x2_t a_val, b_val, c_val;
float32x4x2_t tmp_real, tmp_imag;
unsigned int number = 0;
for (number = 0; number < quarter_points; ++number) {
a_val = vld2q_f32((float*)a_ptr); // a0r|a1r|a2r|a3r || a0i|a1i|a2i|a3i
b_val = vld2q_f32((float*)b_ptr); // b0r|b1r|b2r|b3r || b0i|b1i|b2i|b3i
b_val.val[1] = vnegq_f32(b_val.val[1]);
__VOLK_PREFETCH(a_ptr + 4);
__VOLK_PREFETCH(b_ptr + 4);
// multiply the real*real and imag*imag to get real result
// a0r*b0r|a1r*b1r|a2r*b2r|a3r*b3r
tmp_real.val[0] = vmulq_f32(a_val.val[0], b_val.val[0]);
// a0i*b0i|a1i*b1i|a2i*b2i|a3i*b3i
tmp_real.val[1] = vmulq_f32(a_val.val[1], b_val.val[1]);
// Multiply cross terms to get the imaginary result
// a0r*b0i|a1r*b1i|a2r*b2i|a3r*b3i
tmp_imag.val[0] = vmulq_f32(a_val.val[0], b_val.val[1]);
// a0i*b0r|a1i*b1r|a2i*b2r|a3i*b3r
tmp_imag.val[1] = vmulq_f32(a_val.val[1], b_val.val[0]);
// store the results
c_val.val[0] = vsubq_f32(tmp_real.val[0], tmp_real.val[1]);
c_val.val[1] = vaddq_f32(tmp_imag.val[0], tmp_imag.val[1]);
vst2q_f32((float*)cVector, c_val);
a_ptr += 4;
b_ptr += 4;
cVector += 4;
}
for (number = quarter_points * 4; number < num_points; number++) {
*cVector++ = (*a_ptr++) * conj(*b_ptr++);
}
}
#endif /* LV_HAVE_NEON */
#ifdef LV_HAVE_NEONV8
#include <arm_neon.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_neonv8(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
const lv_32fc_t* a_ptr = aVector;
const lv_32fc_t* b_ptr = bVector;
unsigned int quarter_points = num_points / 4;
float32x4x2_t a_val, b_val, c_val;
unsigned int number = 0;
for (number = 0; number < quarter_points; ++number) {
a_val = vld2q_f32((float*)a_ptr);
b_val = vld2q_f32((float*)b_ptr);
__VOLK_PREFETCH(a_ptr + 8);
__VOLK_PREFETCH(b_ptr + 8);
/* Conjugate b: negate imaginary part */
/* real = ar*br + ai*bi (using FMA) */
c_val.val[0] =
vfmaq_f32(vmulq_f32(a_val.val[0], b_val.val[0]), a_val.val[1], b_val.val[1]);
/* imag = ai*br - ar*bi (using FMS) */
c_val.val[1] =
vfmsq_f32(vmulq_f32(a_val.val[1], b_val.val[0]), a_val.val[0], b_val.val[1]);
vst2q_f32((float*)cVector, c_val);
a_ptr += 4;
b_ptr += 4;
cVector += 4;
}
for (number = quarter_points * 4; number < num_points; number++) {
*cVector++ = (*a_ptr++) * lv_conj(*b_ptr++);
}
}
#endif /* LV_HAVE_NEONV8 */
#ifdef LV_HAVE_RVV
#include <riscv_vector.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_rvv(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
size_t n = num_points;
for (size_t vl; n > 0; n -= vl, aVector += vl, bVector += vl, cVector += vl) {
vl = __riscv_vsetvl_e32m4(n);
vuint64m8_t va = __riscv_vle64_v_u64m8((const uint64_t*)aVector, vl);
vuint64m8_t vb = __riscv_vle64_v_u64m8((const uint64_t*)bVector, vl);
vfloat32m4_t var = __riscv_vreinterpret_f32m4(__riscv_vnsrl(va, 0, vl));
vfloat32m4_t vbr = __riscv_vreinterpret_f32m4(__riscv_vnsrl(vb, 0, vl));
vfloat32m4_t vai = __riscv_vreinterpret_f32m4(__riscv_vnsrl(va, 32, vl));
vfloat32m4_t vbi = __riscv_vreinterpret_f32m4(__riscv_vnsrl(vb, 32, vl));
vfloat32m4_t vr = __riscv_vfmacc(__riscv_vfmul(var, vbr, vl), vai, vbi, vl);
vfloat32m4_t vi = __riscv_vfnmsac(__riscv_vfmul(vai, vbr, vl), var, vbi, vl);
vuint32m4_t vru = __riscv_vreinterpret_u32m4(vr);
vuint32m4_t viu = __riscv_vreinterpret_u32m4(vi);
vuint64m8_t v =
__riscv_vwmaccu(__riscv_vwaddu_vv(vru, viu, vl), 0xFFFFFFFF, viu, vl);
__riscv_vse64((uint64_t*)cVector, v, vl);
}
}
#endif /*LV_HAVE_RVV*/
#ifdef LV_HAVE_RVVSEG
#include <riscv_vector.h>
static inline void volk_32fc_x2_multiply_conjugate_32fc_rvvseg(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
const lv_32fc_t* bVector,
unsigned int num_points)
{
size_t n = num_points;
for (size_t vl; n > 0; n -= vl, aVector += vl, bVector += vl, cVector += vl) {
vl = __riscv_vsetvl_e32m4(n);
vfloat32m4x2_t va = __riscv_vlseg2e32_v_f32m4x2((const float*)aVector, vl);
vfloat32m4x2_t vb = __riscv_vlseg2e32_v_f32m4x2((const float*)bVector, vl);
vfloat32m4_t var = __riscv_vget_f32m4(va, 0), vai = __riscv_vget_f32m4(va, 1);
vfloat32m4_t vbr = __riscv_vget_f32m4(vb, 0), vbi = __riscv_vget_f32m4(vb, 1);
vfloat32m4_t vr = __riscv_vfmacc(__riscv_vfmul(var, vbr, vl), vai, vbi, vl);
vfloat32m4_t vi = __riscv_vfnmsac(__riscv_vfmul(vai, vbr, vl), var, vbi, vl);
__riscv_vsseg2e32_v_f32m4x2(
(float*)cVector, __riscv_vcreate_v_f32m4x2(vr, vi), vl);
}
}
#endif /*LV_HAVE_RVVSEG*/
#endif /* INCLUDED_volk_32fc_x2_multiply_conjugate_32fc_a_H */