/usr/include/volk/volk_16u_byteswap.h is in gnuradio-dev 3.7.2.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | #ifndef INCLUDED_volk_16u_byteswap_u_H
#define INCLUDED_volk_16u_byteswap_u_H
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
/*!
\brief Byteswaps (in-place) an unaligned vector of int16_t's.
\param intsToSwap The vector of data to byte swap
\param numDataPoints The number of data points
*/
static inline void volk_16u_byteswap_u_sse2(uint16_t* intsToSwap, unsigned int num_points){
unsigned int number = 0;
uint16_t* inputPtr = intsToSwap;
__m128i input, left, right, output;
const unsigned int eighthPoints = num_points / 8;
for(;number < eighthPoints; number++){
// Load the 16t values, increment inputPtr later since we're doing it in-place.
input = _mm_loadu_si128((__m128i*)inputPtr);
// Do the two shifts
left = _mm_slli_epi16(input, 8);
right = _mm_srli_epi16(input, 8);
// Or the left and right halves together
output = _mm_or_si128(left, right);
// Store the results
_mm_storeu_si128((__m128i*)inputPtr, output);
inputPtr += 8;
}
// Byteswap any remaining points:
number = eighthPoints*8;
for(; number < num_points; number++){
uint16_t outputVal = *inputPtr;
outputVal = (((outputVal >> 8) & 0xff) | ((outputVal << 8) & 0xff00));
*inputPtr = outputVal;
inputPtr++;
}
}
#endif /* LV_HAVE_SSE2 */
#ifdef LV_HAVE_GENERIC
/*!
\brief Byteswaps (in-place) an unaligned vector of int16_t's.
\param intsToSwap The vector of data to byte swap
\param numDataPoints The number of data points
*/
static inline void volk_16u_byteswap_generic(uint16_t* intsToSwap, unsigned int num_points){
unsigned int point;
uint16_t* inputPtr = intsToSwap;
for(point = 0; point < num_points; point++){
uint16_t output = *inputPtr;
output = (((output >> 8) & 0xff) | ((output << 8) & 0xff00));
*inputPtr = output;
inputPtr++;
}
}
#endif /* LV_HAVE_GENERIC */
#endif /* INCLUDED_volk_16u_byteswap_u_H */
#ifndef INCLUDED_volk_16u_byteswap_a_H
#define INCLUDED_volk_16u_byteswap_a_H
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
/*!
\brief Byteswaps (in-place) an aligned vector of int16_t's.
\param intsToSwap The vector of data to byte swap
\param numDataPoints The number of data points
*/
static inline void volk_16u_byteswap_a_sse2(uint16_t* intsToSwap, unsigned int num_points){
unsigned int number = 0;
uint16_t* inputPtr = intsToSwap;
__m128i input, left, right, output;
const unsigned int eighthPoints = num_points / 8;
for(;number < eighthPoints; number++){
// Load the 16t values, increment inputPtr later since we're doing it in-place.
input = _mm_load_si128((__m128i*)inputPtr);
// Do the two shifts
left = _mm_slli_epi16(input, 8);
right = _mm_srli_epi16(input, 8);
// Or the left and right halves together
output = _mm_or_si128(left, right);
// Store the results
_mm_store_si128((__m128i*)inputPtr, output);
inputPtr += 8;
}
// Byteswap any remaining points:
number = eighthPoints*8;
for(; number < num_points; number++){
uint16_t outputVal = *inputPtr;
outputVal = (((outputVal >> 8) & 0xff) | ((outputVal << 8) & 0xff00));
*inputPtr = outputVal;
inputPtr++;
}
}
#endif /* LV_HAVE_SSE2 */
#ifdef LV_HAVE_GENERIC
/*!
\brief Byteswaps (in-place) an aligned vector of int16_t's.
\param intsToSwap The vector of data to byte swap
\param numDataPoints The number of data points
*/
static inline void volk_16u_byteswap_a_generic(uint16_t* intsToSwap, unsigned int num_points){
unsigned int point;
uint16_t* inputPtr = intsToSwap;
for(point = 0; point < num_points; point++){
uint16_t output = *inputPtr;
output = (((output >> 8) & 0xff) | ((output << 8) & 0xff00));
*inputPtr = output;
inputPtr++;
}
}
#endif /* LV_HAVE_GENERIC */
#ifdef LV_HAVE_ORC
/*!
\brief Byteswaps (in-place) an aligned vector of int16_t's.
\param intsToSwap The vector of data to byte swap
\param numDataPoints The number of data points
*/
extern void volk_16u_byteswap_a_orc_impl(uint16_t* intsToSwap, unsigned int num_points);
static inline void volk_16u_byteswap_u_orc(uint16_t* intsToSwap, unsigned int num_points){
volk_16u_byteswap_a_orc_impl(intsToSwap, num_points);
}
#endif /* LV_HAVE_ORC */
#endif /* INCLUDED_volk_16u_byteswap_a_H */
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