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volk_32fc_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_conjugate_32fc_u_H
#define INCLUDED_volk_32fc_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>
static inline void volk_32fc_conjugate_32fc_u_avx(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
__m256 x;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
__m256 conjugator = _mm256_setr_ps(0, -0.f, 0, -0.f, 0, -0.f, 0, -0.f);
for (; number < quarterPoints; number++) {
x = _mm256_loadu_ps((float*)a); // Load the complex data as ar,ai,br,bi
x = _mm256_xor_ps(x, conjugator); // conjugate register
_mm256_storeu_ps((float*)c, x); // Store the results back into the C container
a += 4;
c += 4;
}
number = quarterPoints * 4;
for (; number < num_points; number++) {
*c++ = lv_conj(*a++);
}
}
#endif /* LV_HAVE_AVX */
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
static inline void volk_32fc_conjugate_32fc_u_sse3(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int halfPoints = num_points / 2;
__m128 x;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
__m128 conjugator = _mm_setr_ps(0, -0.f, 0, -0.f);
for (; number < halfPoints; number++) {
x = _mm_loadu_ps((float*)a); // Load the complex data as ar,ai,br,bi
x = _mm_xor_ps(x, conjugator); // conjugate register
_mm_storeu_ps((float*)c, x); // Store the results back into the C container
a += 2;
c += 2;
}
if ((num_points % 2) != 0) {
*c = lv_conj(*a);
}
}
#endif /* LV_HAVE_SSE3 */
#ifdef LV_HAVE_GENERIC
static inline void volk_32fc_conjugate_32fc_generic(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
lv_32fc_t* cPtr = cVector;
const lv_32fc_t* aPtr = aVector;
unsigned int number = 0;
for (number = 0; number < num_points; number++) {
*cPtr++ = lv_conj(*aPtr++);
}
}
#endif /* LV_HAVE_GENERIC */
#endif /* INCLUDED_volk_32fc_conjugate_32fc_u_H */
#ifndef INCLUDED_volk_32fc_conjugate_32fc_a_H
#define INCLUDED_volk_32fc_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>
static inline void volk_32fc_conjugate_32fc_a_avx(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
__m256 x;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
__m256 conjugator = _mm256_setr_ps(0, -0.f, 0, -0.f, 0, -0.f, 0, -0.f);
for (; number < quarterPoints; number++) {
x = _mm256_load_ps((float*)a); // Load the complex data as ar,ai,br,bi
x = _mm256_xor_ps(x, conjugator); // conjugate register
_mm256_store_ps((float*)c, x); // Store the results back into the C container
a += 4;
c += 4;
}
number = quarterPoints * 4;
for (; number < num_points; number++) {
*c++ = lv_conj(*a++);
}
}
#endif /* LV_HAVE_AVX */
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
static inline void volk_32fc_conjugate_32fc_a_sse3(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int halfPoints = num_points / 2;
__m128 x;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
__m128 conjugator = _mm_setr_ps(0, -0.f, 0, -0.f);
for (; number < halfPoints; number++) {
x = _mm_load_ps((float*)a); // Load the complex data as ar,ai,br,bi
x = _mm_xor_ps(x, conjugator); // conjugate register
_mm_store_ps((float*)c, x); // Store the results back into the C container
a += 2;
c += 2;
}
if ((num_points % 2) != 0) {
*c = lv_conj(*a);
}
}
#endif /* LV_HAVE_SSE3 */
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
static inline void volk_32fc_conjugate_32fc_a_neon(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
unsigned int number;
const unsigned int quarterPoints = num_points / 4;
float32x4x2_t x;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
for (number = 0; number < quarterPoints; number++) {
__VOLK_PREFETCH(a + 4);
x = vld2q_f32((float*)a); // Load the complex data as ar,br,cr,dr; ai,bi,ci,di
// xor the imaginary lane
x.val[1] = vnegq_f32(x.val[1]);
vst2q_f32((float*)c, x); // Store the results back into the C container
a += 4;
c += 4;
}
for (number = quarterPoints * 4; number < num_points; number++) {
*c++ = lv_conj(*a++);
}
}
#endif /* LV_HAVE_NEON */
#ifdef LV_HAVE_NEONV8
#include <arm_neon.h>
static inline void volk_32fc_conjugate_32fc_neonv8(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
unsigned int n = num_points;
lv_32fc_t* c = cVector;
const lv_32fc_t* a = aVector;
/* Sign mask to flip imaginary parts: [0, -0, 0, -0] */
const uint32x4_t sign_mask =
vreinterpretq_u32_f32((float32x4_t){ 0.0f, -0.0f, 0.0f, -0.0f });
/* Process 4 complex numbers per iteration (2x unroll) */
while (n >= 4) {
float32x4_t v0 = vld1q_f32((const float*)a);
float32x4_t v1 = vld1q_f32((const float*)(a + 2));
__VOLK_PREFETCH(a + 8);
/* XOR to flip sign of imaginary parts */
v0 = vreinterpretq_f32_u32(veorq_u32(vreinterpretq_u32_f32(v0), sign_mask));
v1 = vreinterpretq_f32_u32(veorq_u32(vreinterpretq_u32_f32(v1), sign_mask));
vst1q_f32((float*)c, v0);
vst1q_f32((float*)(c + 2), v1);
a += 4;
c += 4;
n -= 4;
}
/* Scalar tail */
while (n > 0) {
*c++ = lv_conj(*a++);
n--;
}
}
#endif /* LV_HAVE_NEONV8 */
#ifdef LV_HAVE_RVV
#include <riscv_vector.h>
static inline void volk_32fc_conjugate_32fc_rvv(lv_32fc_t* cVector,
const lv_32fc_t* aVector,
unsigned int num_points)
{
size_t n = num_points;
vuint64m8_t m = __riscv_vmv_v_x_u64m8(1ull << 63, __riscv_vsetvlmax_e64m8());
for (size_t vl; n > 0; n -= vl, aVector += vl, cVector += vl) {
vl = __riscv_vsetvl_e64m8(n);
vuint64m8_t v = __riscv_vle64_v_u64m8((const uint64_t*)aVector, vl);
__riscv_vse64((uint64_t*)cVector, __riscv_vxor(v, m, vl), vl);
}
}
#endif /*LV_HAVE_RVV*/
#endif /* INCLUDED_volk_32fc_conjugate_32fc_a_H */