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move _histogram.h to _shared/vectorized_ops.h, and copyright info to CONTRIBUTORS.txt

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Thouis (Ray) Jones
2013-02-19 21:44:06 -05:00
parent 4af05245ed
commit ba1d27b357
3 changed files with 4 additions and 11 deletions
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skimage/_shared/vectorized_ops.h
+109
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@@ -0,0 +1,109 @@
/* Intrinsic declarations */
#if defined(__SSE2__)
#include <emmintrin.h>
#elif defined(__MMX__)
#include <mmintrin.h>
#elif defined(__ALTIVEC__)
#include <altivec.h>
#endif
/* Compiler peculiarities */
#if defined(__GNUC__)
#include <stdint.h>
#elif defined(_MSC_VER)
#define inline __inline
#endif
/**
* Add 16 unsigned 16-bit integers using SSE2, MMX or Altivec, if
* available.
*/
#if defined(__SSE2__)
static inline void add16(uint16_t *dest, uint16_t *src)
{
__m128i *d, *s;
d = (__m128i *) dest;
s = (__m128i *) src;
*d = _mm_add_epi16(*d, *s);
d++; s++;
*d = _mm_add_epi16(*d, *s);
}
#elif defined(__MMX__)
static inline void add16(uint16_t *dest, uint16_t *src)
{
__m64 *d, *s;
d = (__m64 *) dest;
s = (__m64 *) src;
*d = _mm_add_pi16(*d, *s);
d++; s++;
*d = _mm_add_pi16(*d, *s);
d++; s++;
*d = _mm_add_pi16(*d, *s);
d++; s++;
*d = _mm_add_pi16(*d, *s);
}
#elif defined(__ALTIVEC__)
static inline void add16(uint16_t *dest, uint16_t *src)
{
vector unsigned short *d, *s;
d = (vector unsigned short *) dest;
s = (vector unsigned short *) src;
*d = vec_add(*d, *s);
d++; s++;
*d = vec_add(*d, *s);
}
#else
static inline void add16(uint16_t *dest, uint16_t *src)
{
int i;
for (i = 0; i < 16; i++) dest[i] += src[i];
}
#endif
/**
* Subtract 16 unsigned 16-bit integers using SSE2, MMX or Altivec, if
* available.
*/
#if defined(__SSE2__)
static inline void sub16(uint16_t *dest, uint16_t *src)
{
__m128i *d, *s;
d = (__m128i *) dest;
s = (__m128i *) src;
*d = _mm_sub_epi16(*d, *s);
d++; s++;
*d = _mm_sub_epi16(*d, *s);
}
#elif defined(__MMX__)
static inline void sub16(uint16_t *dest, uint16_t *src)
{
__m64 *d, *s;
d = (__m64 *) dest;
s = (__m64 *) src;
*d = _mm_sub_pi16(*d, *s);
d++; s++;
*d = _mm_sub_pi16(*d, *s);
d++; s++;
*d = _mm_sub_pi16(*d, *s);
d++; s++;
*d = _mm_sub_pi16(*d, *s);
}
#elif defined(__ALTIVEC__)
static inline void sub16(uint16_t *dest, uint16_t *src)
{
vector unsigned short *d, *s;
d = (vector unsigned short *) dest;
s = (vector unsigned short *) src;
*d = vec_sub(*d, *s);
d++; s++;
*d = vec_sub(*d, *s);
}
#else
static inline void sub16(uint16_t *dest, uint16_t *src)
{
int i;
for (i = 0; i < 16; i++) dest[i] -= src[i];
}
#endif