mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-28 02:30:57 +08:00
Jan Margeta
111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
/* Intrinsic declarations */
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#if defined(__SSE2__)
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#include <emmintrin.h>
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#elif defined(__MMX__)
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#include <mmintrin.h>
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#elif defined(__ALTIVEC__)
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#include <altivec.h>
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#endif
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/* Compiler peculiarities */
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#if defined(__GNUC__)
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#include <stdint.h>
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#elif defined(_MSC_VER)
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#define inline __inline
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typedef unsigned __int16 uint16_t;
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#endif
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/**
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* Add 16 unsigned 16-bit integers using SSE2, MMX or Altivec, if
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* available.
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*/
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#if defined(__SSE2__)
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static inline void add16(uint16_t *dest, uint16_t *src)
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{
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__m128i *d, *s;
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d = (__m128i *) dest;
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s = (__m128i *) src;
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*d = _mm_add_epi16(*d, *s);
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d++; s++;
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*d = _mm_add_epi16(*d, *s);
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}
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#elif defined(__MMX__)
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static inline void add16(uint16_t *dest, uint16_t *src)
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{
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__m64 *d, *s;
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d = (__m64 *) dest;
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s = (__m64 *) src;
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*d = _mm_add_pi16(*d, *s);
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d++; s++;
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*d = _mm_add_pi16(*d, *s);
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d++; s++;
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*d = _mm_add_pi16(*d, *s);
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d++; s++;
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*d = _mm_add_pi16(*d, *s);
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}
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#elif defined(__ALTIVEC__)
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static inline void add16(uint16_t *dest, uint16_t *src)
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{
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vector unsigned short *d, *s;
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d = (vector unsigned short *) dest;
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s = (vector unsigned short *) src;
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*d = vec_add(*d, *s);
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d++; s++;
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*d = vec_add(*d, *s);
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}
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#else
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static inline void add16(uint16_t *dest, uint16_t *src)
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{
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int i;
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for (i = 0; i < 16; i++) dest[i] += src[i];
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}
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#endif
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/**
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* Subtract 16 unsigned 16-bit integers using SSE2, MMX or Altivec, if
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* available.
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*/
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#if defined(__SSE2__)
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static inline void sub16(uint16_t *dest, uint16_t *src)
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{
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__m128i *d, *s;
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d = (__m128i *) dest;
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s = (__m128i *) src;
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*d = _mm_sub_epi16(*d, *s);
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d++; s++;
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*d = _mm_sub_epi16(*d, *s);
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}
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#elif defined(__MMX__)
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static inline void sub16(uint16_t *dest, uint16_t *src)
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{
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__m64 *d, *s;
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d = (__m64 *) dest;
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s = (__m64 *) src;
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*d = _mm_sub_pi16(*d, *s);
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d++; s++;
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*d = _mm_sub_pi16(*d, *s);
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d++; s++;
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*d = _mm_sub_pi16(*d, *s);
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d++; s++;
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*d = _mm_sub_pi16(*d, *s);
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}
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#elif defined(__ALTIVEC__)
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static inline void sub16(uint16_t *dest, uint16_t *src)
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{
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vector unsigned short *d, *s;
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d = (vector unsigned short *) dest;
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s = (vector unsigned short *) src;
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*d = vec_sub(*d, *s);
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d++; s++;
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*d = vec_sub(*d, *s);
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}
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#else
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static inline void sub16(uint16_t *dest, uint16_t *src)
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{
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int i;
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for (i = 0; i < 16; i++) dest[i] -= src[i];
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}
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#endif
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