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volk_64u_byteswap.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_64u_byteswap_u_H
#define INCLUDED_volk_64u_byteswap_u_H
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
static inline void volk_64u_byteswap_u_sse2(uint64_t* intsToSwap, unsigned int num_points)
{
uint32_t* inputPtr = (uint32_t*)intsToSwap;
__m128i input, byte1, byte2, byte3, byte4, output;
__m128i byte2mask = _mm_set1_epi32(0x00FF0000);
__m128i byte3mask = _mm_set1_epi32(0x0000FF00);
uint64_t number = 0;
const unsigned int halfPoints = num_points / 2;
for (; number < halfPoints; number++) {
// Load the 32t values, increment inputPtr later since we're doing it in-place.
input = _mm_loadu_si128((__m128i*)inputPtr);
// Do the four shifts
byte1 = _mm_slli_epi32(input, 24);
byte2 = _mm_slli_epi32(input, 8);
byte3 = _mm_srli_epi32(input, 8);
byte4 = _mm_srli_epi32(input, 24);
// Or bytes together
output = _mm_or_si128(byte1, byte4);
byte2 = _mm_and_si128(byte2, byte2mask);
output = _mm_or_si128(output, byte2);
byte3 = _mm_and_si128(byte3, byte3mask);
output = _mm_or_si128(output, byte3);
// Reorder the two words
output = _mm_shuffle_epi32(output, _MM_SHUFFLE(2, 3, 0, 1));
// Store the results
_mm_storeu_si128((__m128i*)inputPtr, output);
inputPtr += 4;
}
// Byteswap any remaining points:
number = halfPoints * 2;
for (; number < num_points; number++) {
uint32_t output1 = *inputPtr;
uint32_t output2 = inputPtr[1];
output1 = (((output1 >> 24) & 0xff) | ((output1 >> 8) & 0x0000ff00) |
((output1 << 8) & 0x00ff0000) | ((output1 << 24) & 0xff000000));
output2 = (((output2 >> 24) & 0xff) | ((output2 >> 8) & 0x0000ff00) |
((output2 << 8) & 0x00ff0000) | ((output2 << 24) & 0xff000000));
*inputPtr++ = output2;
*inputPtr++ = output1;
}
}
#endif /* LV_HAVE_SSE2 */
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
static inline void volk_64u_byteswap_neon(uint64_t* intsToSwap, unsigned int num_points)
{
uint8_t* inputPtr = (uint8_t*)intsToSwap;
unsigned int number = 0;
const unsigned int eighth_points = num_points / 8;
for (; number < eighth_points; number++) {
uint8x16_t input0 = vld1q_u8(inputPtr);
uint8x16_t input1 = vld1q_u8(inputPtr + 16);
uint8x16_t input2 = vld1q_u8(inputPtr + 32);
uint8x16_t input3 = vld1q_u8(inputPtr + 48);
// Reverse bytes within each 64-bit element
uint8x16_t output0 = vrev64q_u8(input0);
uint8x16_t output1 = vrev64q_u8(input1);
uint8x16_t output2 = vrev64q_u8(input2);
uint8x16_t output3 = vrev64q_u8(input3);
vst1q_u8(inputPtr, output0);
vst1q_u8(inputPtr + 16, output1);
vst1q_u8(inputPtr + 32, output2);
vst1q_u8(inputPtr + 48, output3);
inputPtr += 64;
}
// Handle remaining points
number = eighth_points * 8;
uint32_t* intPtr = (uint32_t*)(intsToSwap + number);
for (; number < num_points; number++) {
uint32_t output1 = *intPtr;
uint32_t output2 = intPtr[1];
output1 = (((output1 >> 24) & 0xff) | ((output1 >> 8) & 0x0000ff00) |
((output1 << 8) & 0x00ff0000) | ((output1 << 24) & 0xff000000));
output2 = (((output2 >> 24) & 0xff) | ((output2 >> 8) & 0x0000ff00) |
((output2 << 8) & 0x00ff0000) | ((output2 << 24) & 0xff000000));
*intPtr++ = output2;
*intPtr++ = output1;
}
}
#endif /* LV_HAVE_NEON */
#ifdef LV_HAVE_GENERIC
static inline void volk_64u_byteswap_generic(uint64_t* intsToSwap,
unsigned int num_points)
{
uint32_t* inputPtr = (uint32_t*)intsToSwap;
unsigned int point;
for (point = 0; point < num_points; point++) {
uint32_t output1 = *inputPtr;
uint32_t output2 = inputPtr[1];
output1 = (((output1 >> 24) & 0xff) | ((output1 >> 8) & 0x0000ff00) |
((output1 << 8) & 0x00ff0000) | ((output1 << 24) & 0xff000000));
output2 = (((output2 >> 24) & 0xff) | ((output2 >> 8) & 0x0000ff00) |
((output2 << 8) & 0x00ff0000) | ((output2 << 24) & 0xff000000));
*inputPtr++ = output2;
*inputPtr++ = output1;
}
}
#endif /* LV_HAVE_GENERIC */
#if LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_64u_byteswap_a_avx2(uint64_t* intsToSwap, unsigned int num_points)
{
unsigned int number = 0;
const unsigned int nPerSet = 4;
const uint64_t nSets = num_points / nPerSet;
uint32_t* inputPtr = (uint32_t*)intsToSwap;
const uint8_t shuffleVector[32] = { 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13,
12, 11, 10, 9, 8, 23, 22, 21, 20, 19, 18,
17, 16, 31, 30, 29, 28, 27, 26, 25, 24 };
const __m256i myShuffle = _mm256_loadu_si256((__m256i*)&shuffleVector[0]);
for (; number < nSets; number++) {
// Load the 32t values, increment inputPtr later since we're doing it in-place.
const __m256i input = _mm256_load_si256((__m256i*)inputPtr);
const __m256i output = _mm256_shuffle_epi8(input, myShuffle);
// Store the results
_mm256_store_si256((__m256i*)inputPtr, output);
/* inputPtr is 32bit so increment twice */
inputPtr += 2 * nPerSet;
}
// Byteswap any remaining points:
for (number = nSets * nPerSet; number < num_points; ++number) {
uint32_t output1 = *inputPtr;
uint32_t output2 = inputPtr[1];
uint32_t out1 =
((((output1) >> 24) & 0x000000ff) | (((output1) >> 8) & 0x0000ff00) |
(((output1) << 8) & 0x00ff0000) | (((output1) << 24) & 0xff000000));
uint32_t out2 =
((((output2) >> 24) & 0x000000ff) | (((output2) >> 8) & 0x0000ff00) |
(((output2) << 8) & 0x00ff0000) | (((output2) << 24) & 0xff000000));
*inputPtr++ = out2;
*inputPtr++ = out1;
}
}
#endif /* LV_HAVE_AVX2 */
#if LV_HAVE_SSSE3
#include <tmmintrin.h>
static inline void volk_64u_byteswap_a_ssse3(uint64_t* intsToSwap,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int nPerSet = 2;
const uint64_t nSets = num_points / nPerSet;
uint32_t* inputPtr = (uint32_t*)intsToSwap;
uint8_t shuffleVector[16] = { 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8 };
const __m128i myShuffle = _mm_loadu_si128((__m128i*)&shuffleVector);
for (; number < nSets; number++) {
// Load the 32t values, increment inputPtr later since we're doing it in-place.
const __m128i input = _mm_load_si128((__m128i*)inputPtr);
const __m128i output = _mm_shuffle_epi8(input, myShuffle);
// Store the results
_mm_store_si128((__m128i*)inputPtr, output);
/* inputPtr is 32bit so increment twice */
inputPtr += 2 * nPerSet;
}
// Byteswap any remaining points:
for (number = nSets * nPerSet; number < num_points; ++number) {
uint32_t output1 = *inputPtr;
uint32_t output2 = inputPtr[1];
uint32_t out1 =
((((output1) >> 24) & 0x000000ff) | (((output1) >> 8) & 0x0000ff00) |
(((output1) << 8) & 0x00ff0000) | (((output1) << 24) & 0xff000000));
uint32_t out2 =
((((output2) >> 24) & 0x000000ff) | (((output2) >> 8) & 0x0000ff00) |
(((output2) << 8) & 0x00ff0000) | (((output2) << 24) & 0xff000000));
*inputPtr++ = out2;
*inputPtr++ = out1;
}
}
#endif /* LV_HAVE_SSSE3 */
#endif /* INCLUDED_volk_64u_byteswap_u_H */
#ifndef INCLUDED_volk_64u_byteswap_a_H
#define INCLUDED_volk_64u_byteswap_a_H
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
static inline void volk_64u_byteswap_a_sse2(uint64_t* intsToSwap, unsigned int num_points)
{
uint32_t* inputPtr = (uint32_t*)intsToSwap;
__m128i input, byte1, byte2, byte3, byte4, output;
__m128i byte2mask = _mm_set1_epi32(0x00FF0000);
__m128i byte3mask = _mm_set1_epi32(0x0000FF00);
uint64_t number = 0;
const unsigned int halfPoints = num_points / 2;
for (; number < halfPoints; number++) {
// Load the 32t values, increment inputPtr later since we're doing it in-place.
input = _mm_load_si128((__m128i*)inputPtr);
// Do the four shifts
byte1 = _mm_slli_epi32(input, 24);
byte2 = _mm_slli_epi32(input, 8);
byte3 = _mm_srli_epi32(input, 8);
byte4 = _mm_srli_epi32(input, 24);
// Or bytes together
output = _mm_or_si128(byte1, byte4);
byte2 = _mm_and_si128(byte2, byte2mask);
output = _mm_or_si128(output, byte2);
byte3 = _mm_and_si128(byte3, byte3mask);
output = _mm_or_si128(output, byte3);
// Reorder the two words
output = _mm_shuffle_epi32(output, _MM_SHUFFLE(2, 3, 0, 1));
// Store the results
_mm_store_si128((__m128i*)inputPtr, output);
inputPtr += 4;
}
// Byteswap any remaining points:
number = halfPoints * 2;
for (; number < num_points; number++) {
uint32_t output1 = *inputPtr;
uint32_t output2 = inputPtr[1];
output1 = (((output1 >> 24) & 0xff) | ((output1 >> 8) & 0x0000ff00) |
((output1 << 8) & 0x00ff0000) | ((output1 << 24) & 0xff000000));
output2 = (((output2 >> 24) & 0xff) | ((output2 >> 8) & 0x0000ff00) |
((output2 << 8) & 0x00ff0000) | ((output2 << 24) & 0xff000000));
*inputPtr++ = output2;
*inputPtr++ = output1;
}
}
#endif /* LV_HAVE_SSE2 */
#if LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_64u_byteswap_u_avx2(uint64_t* intsToSwap, unsigned int num_points)
{
unsigned int number = 0;
const unsigned int nPerSet = 4;
const uint64_t nSets = num_points / nPerSet;
uint32_t* inputPtr = (uint32_t*)intsToSwap;
const uint8_t shuffleVector[32] = { 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13,
12, 11, 10, 9, 8, 23, 22, 21, 20, 19, 18,
17, 16, 31, 30, 29, 28, 27, 26, 25, 24 };
const __m256i myShuffle = _mm256_loadu_si256((__m256i*)&shuffleVector[0]);
for (; number < nSets; number++) {
// Load the 32t values, increment inputPtr later since we're doing it in-place.
const __m256i input = _mm256_loadu_si256((__m256i*)inputPtr);
const __m256i output = _mm256_shuffle_epi8(input, myShuffle);
// Store the results
_mm256_storeu_si256((__m256i*)inputPtr, output);
/* inputPtr is 32bit so increment twice */
inputPtr += 2 * nPerSet;
}
// Byteswap any remaining points:
for (number = nSets * nPerSet; number < num_points; ++number) {
uint32_t output1 = *inputPtr;
uint32_t output2 = inputPtr[1];
uint32_t out1 =
((((output1) >> 24) & 0x000000ff) | (((output1) >> 8) & 0x0000ff00) |
(((output1) << 8) & 0x00ff0000) | (((output1) << 24) & 0xff000000));
uint32_t out2 =
((((output2) >> 24) & 0x000000ff) | (((output2) >> 8) & 0x0000ff00) |
(((output2) << 8) & 0x00ff0000) | (((output2) << 24) & 0xff000000));
*inputPtr++ = out2;
*inputPtr++ = out1;
}
}
#endif /* LV_HAVE_AVX2 */
#if LV_HAVE_SSSE3
#include <tmmintrin.h>
static inline void volk_64u_byteswap_u_ssse3(uint64_t* intsToSwap,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int nPerSet = 2;
const uint64_t nSets = num_points / nPerSet;
uint32_t* inputPtr = (uint32_t*)intsToSwap;
uint8_t shuffleVector[16] = { 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8 };
const __m128i myShuffle = _mm_loadu_si128((__m128i*)&shuffleVector);
for (; number < nSets; number++) {
// Load the 32t values, increment inputPtr later since we're doing it in-place.
const __m128i input = _mm_loadu_si128((__m128i*)inputPtr);
const __m128i output = _mm_shuffle_epi8(input, myShuffle);
// Store the results
_mm_storeu_si128((__m128i*)inputPtr, output);
/* inputPtr is 32bit so increment twice */
inputPtr += 2 * nPerSet;
}
// Byteswap any remaining points:
for (number = nSets * nPerSet; number < num_points; ++number) {
uint32_t output1 = *inputPtr;
uint32_t output2 = inputPtr[1];
uint32_t out1 =
((((output1) >> 24) & 0x000000ff) | (((output1) >> 8) & 0x0000ff00) |
(((output1) << 8) & 0x00ff0000) | (((output1) << 24) & 0xff000000));
uint32_t out2 =
((((output2) >> 24) & 0x000000ff) | (((output2) >> 8) & 0x0000ff00) |
(((output2) << 8) & 0x00ff0000) | (((output2) << 24) & 0xff000000));
*inputPtr++ = out2;
*inputPtr++ = out1;
}
}
#endif /* LV_HAVE_SSSE3 */
#ifdef LV_HAVE_RVV
#include <riscv_vector.h>
static inline void volk_64u_byteswap_rvv(uint64_t* intsToSwap, unsigned int num_points)
{
size_t n = num_points;
size_t vlmax = __riscv_vsetvlmax_e8m1();
if (vlmax <= 256) {
vuint8m1_t vidx = __riscv_vreinterpret_u8m1(
__riscv_vsub(__riscv_vreinterpret_u64m1(__riscv_vid_v_u8m1(vlmax)),
0x0706050403020100 - 0x1020304050607,
vlmax / 8));
for (size_t vl; n > 0; n -= vl, intsToSwap += vl) {
vl = __riscv_vsetvl_e64m8(n);
vuint8m8_t v =
__riscv_vreinterpret_u8m8(__riscv_vle64_v_u64m8(intsToSwap, vl));
v = RISCV_PERM8(__riscv_vrgather, v, vidx);
__riscv_vse64(intsToSwap, __riscv_vreinterpret_u64m8(v), vl);
}
} else {
vuint16m2_t vid = __riscv_vid_v_u16m2(vlmax);
vuint16m2_t voff1 = __riscv_vand(vid, 0x7, vlmax);
vuint16m2_t voff2 = __riscv_vrsub(voff1, 0x7, vlmax);
vuint16m2_t vidx = __riscv_vadd(__riscv_vsub(vid, voff1, vlmax), voff2, vlmax);
for (size_t vl; n > 0; n -= vl, intsToSwap += vl) {
vl = __riscv_vsetvl_e64m8(n);
vuint8m8_t v =
__riscv_vreinterpret_u8m8(__riscv_vle64_v_u64m8(intsToSwap, vl));
v = RISCV_PERM8(__riscv_vrgatherei16, v, vidx);
__riscv_vse64(intsToSwap, __riscv_vreinterpret_u64m8(v), vl);
}
}
}
#endif /* LV_HAVE_RVV */
#ifdef LV_HAVE_RVA23
#include <riscv_vector.h>
static inline void volk_64u_byteswap_rva23(uint64_t* intsToSwap, unsigned int num_points)
{
size_t n = num_points;
for (size_t vl; n > 0; n -= vl, intsToSwap += vl) {
vl = __riscv_vsetvl_e64m8(n);
vuint64m8_t v = __riscv_vle64_v_u64m8(intsToSwap, vl);
__riscv_vse64(intsToSwap, __riscv_vrev8(v, vl), vl);
}
}
#endif /* LV_HAVE_RVA23 */
#endif /* INCLUDED_volk_64u_byteswap_a_H */