mirror of
https://github.com/ClickHouse/ClickHouse.git
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692 lines
20 KiB
C++
692 lines
20 KiB
C++
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//=====================================================================
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//
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// FastMemcpy.c - skywind3000@163.com, 2015
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//
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// feature:
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// 50% speed up in avg. vs standard memcpy (tested in vc2012/gcc5.1)
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//
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//=====================================================================
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#ifndef __FAST_MEMCPY_H__
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#define __FAST_MEMCPY_H__
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#include <stddef.h>
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#include <stdint.h>
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#include <emmintrin.h>
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//---------------------------------------------------------------------
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// force inline for compilers
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//---------------------------------------------------------------------
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#ifndef INLINE
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#ifdef __GNUC__
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#if (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1))
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#define INLINE __inline__ __attribute__((always_inline))
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#else
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#define INLINE __inline__
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#endif
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#elif defined(_MSC_VER)
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#define INLINE __forceinline
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#elif (defined(__BORLANDC__) || defined(__WATCOMC__))
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#define INLINE __inline
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#else
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#define INLINE
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#endif
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#endif
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typedef __attribute__((__aligned__(1))) uint16_t uint16_unaligned_t;
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typedef __attribute__((__aligned__(1))) uint32_t uint32_unaligned_t;
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typedef __attribute__((__aligned__(1))) uint64_t uint64_unaligned_t;
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//---------------------------------------------------------------------
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// fast copy for different sizes
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//---------------------------------------------------------------------
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static INLINE void memcpy_sse2_16(void *dst, const void *src) {
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__m128i m0 = _mm_loadu_si128(((const __m128i*)src) + 0);
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_mm_storeu_si128(((__m128i*)dst) + 0, m0);
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}
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static INLINE void memcpy_sse2_32(void *dst, const void *src) {
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__m128i m0 = _mm_loadu_si128(((const __m128i*)src) + 0);
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__m128i m1 = _mm_loadu_si128(((const __m128i*)src) + 1);
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_mm_storeu_si128(((__m128i*)dst) + 0, m0);
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_mm_storeu_si128(((__m128i*)dst) + 1, m1);
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}
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static INLINE void memcpy_sse2_64(void *dst, const void *src) {
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__m128i m0 = _mm_loadu_si128(((const __m128i*)src) + 0);
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__m128i m1 = _mm_loadu_si128(((const __m128i*)src) + 1);
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__m128i m2 = _mm_loadu_si128(((const __m128i*)src) + 2);
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__m128i m3 = _mm_loadu_si128(((const __m128i*)src) + 3);
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_mm_storeu_si128(((__m128i*)dst) + 0, m0);
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_mm_storeu_si128(((__m128i*)dst) + 1, m1);
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_mm_storeu_si128(((__m128i*)dst) + 2, m2);
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_mm_storeu_si128(((__m128i*)dst) + 3, m3);
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}
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static INLINE void memcpy_sse2_128(void *dst, const void *src) {
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__m128i m0 = _mm_loadu_si128(((const __m128i*)src) + 0);
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__m128i m1 = _mm_loadu_si128(((const __m128i*)src) + 1);
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__m128i m2 = _mm_loadu_si128(((const __m128i*)src) + 2);
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__m128i m3 = _mm_loadu_si128(((const __m128i*)src) + 3);
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__m128i m4 = _mm_loadu_si128(((const __m128i*)src) + 4);
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__m128i m5 = _mm_loadu_si128(((const __m128i*)src) + 5);
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__m128i m6 = _mm_loadu_si128(((const __m128i*)src) + 6);
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__m128i m7 = _mm_loadu_si128(((const __m128i*)src) + 7);
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_mm_storeu_si128(((__m128i*)dst) + 0, m0);
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_mm_storeu_si128(((__m128i*)dst) + 1, m1);
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_mm_storeu_si128(((__m128i*)dst) + 2, m2);
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_mm_storeu_si128(((__m128i*)dst) + 3, m3);
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_mm_storeu_si128(((__m128i*)dst) + 4, m4);
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_mm_storeu_si128(((__m128i*)dst) + 5, m5);
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_mm_storeu_si128(((__m128i*)dst) + 6, m6);
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_mm_storeu_si128(((__m128i*)dst) + 7, m7);
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}
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//---------------------------------------------------------------------
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// tiny memory copy with jump table optimized
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//---------------------------------------------------------------------
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static INLINE void *memcpy_tiny(void *dst, const void *src, size_t size) {
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unsigned char *dd = ((unsigned char*)dst) + size;
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const unsigned char *ss = ((const unsigned char*)src) + size;
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switch (size) {
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case 64:
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memcpy_sse2_64(dd - 64, ss - 64);
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case 0:
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break;
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case 65:
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memcpy_sse2_64(dd - 65, ss - 65);
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case 1:
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dd[-1] = ss[-1];
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break;
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case 66:
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memcpy_sse2_64(dd - 66, ss - 66);
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case 2:
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*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
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break;
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case 67:
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memcpy_sse2_64(dd - 67, ss - 67);
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case 3:
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*((uint16_unaligned_t*)(dd - 3)) = *((uint16_unaligned_t*)(ss - 3));
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dd[-1] = ss[-1];
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break;
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case 68:
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memcpy_sse2_64(dd - 68, ss - 68);
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case 4:
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 69:
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memcpy_sse2_64(dd - 69, ss - 69);
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case 5:
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*((uint32_unaligned_t*)(dd - 5)) = *((uint32_unaligned_t*)(ss - 5));
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dd[-1] = ss[-1];
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break;
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case 70:
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memcpy_sse2_64(dd - 70, ss - 70);
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case 6:
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*((uint32_unaligned_t*)(dd - 6)) = *((uint32_unaligned_t*)(ss - 6));
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*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
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break;
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case 71:
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memcpy_sse2_64(dd - 71, ss - 71);
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case 7:
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*((uint32_unaligned_t*)(dd - 7)) = *((uint32_unaligned_t*)(ss - 7));
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 72:
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memcpy_sse2_64(dd - 72, ss - 72);
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case 8:
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*((uint64_unaligned_t*)(dd - 8)) = *((uint64_unaligned_t*)(ss - 8));
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break;
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case 73:
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memcpy_sse2_64(dd - 73, ss - 73);
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case 9:
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*((uint64_unaligned_t*)(dd - 9)) = *((uint64_unaligned_t*)(ss - 9));
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dd[-1] = ss[-1];
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break;
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case 74:
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memcpy_sse2_64(dd - 74, ss - 74);
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case 10:
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*((uint64_unaligned_t*)(dd - 10)) = *((uint64_unaligned_t*)(ss - 10));
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*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
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break;
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case 75:
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memcpy_sse2_64(dd - 75, ss - 75);
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case 11:
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*((uint64_unaligned_t*)(dd - 11)) = *((uint64_unaligned_t*)(ss - 11));
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 76:
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memcpy_sse2_64(dd - 76, ss - 76);
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case 12:
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*((uint64_unaligned_t*)(dd - 12)) = *((uint64_unaligned_t*)(ss - 12));
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 77:
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memcpy_sse2_64(dd - 77, ss - 77);
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case 13:
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*((uint64_unaligned_t*)(dd - 13)) = *((uint64_unaligned_t*)(ss - 13));
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*((uint32_unaligned_t*)(dd - 5)) = *((uint32_unaligned_t*)(ss - 5));
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dd[-1] = ss[-1];
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break;
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case 78:
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memcpy_sse2_64(dd - 78, ss - 78);
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case 14:
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*((uint64_unaligned_t*)(dd - 14)) = *((uint64_unaligned_t*)(ss - 14));
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*((uint64_unaligned_t*)(dd - 8)) = *((uint64_unaligned_t*)(ss - 8));
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break;
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case 79:
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memcpy_sse2_64(dd - 79, ss - 79);
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case 15:
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*((uint64_unaligned_t*)(dd - 15)) = *((uint64_unaligned_t*)(ss - 15));
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*((uint64_unaligned_t*)(dd - 8)) = *((uint64_unaligned_t*)(ss - 8));
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break;
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case 80:
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memcpy_sse2_64(dd - 80, ss - 80);
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case 16:
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 81:
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memcpy_sse2_64(dd - 81, ss - 81);
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case 17:
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memcpy_sse2_16(dd - 17, ss - 17);
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dd[-1] = ss[-1];
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break;
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case 82:
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memcpy_sse2_64(dd - 82, ss - 82);
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case 18:
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memcpy_sse2_16(dd - 18, ss - 18);
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*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
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break;
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case 83:
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memcpy_sse2_64(dd - 83, ss - 83);
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case 19:
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memcpy_sse2_16(dd - 19, ss - 19);
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*((uint16_unaligned_t*)(dd - 3)) = *((uint16_unaligned_t*)(ss - 3));
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dd[-1] = ss[-1];
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break;
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case 84:
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memcpy_sse2_64(dd - 84, ss - 84);
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case 20:
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memcpy_sse2_16(dd - 20, ss - 20);
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 85:
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memcpy_sse2_64(dd - 85, ss - 85);
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case 21:
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memcpy_sse2_16(dd - 21, ss - 21);
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*((uint32_unaligned_t*)(dd - 5)) = *((uint32_unaligned_t*)(ss - 5));
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dd[-1] = ss[-1];
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break;
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case 86:
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memcpy_sse2_64(dd - 86, ss - 86);
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case 22:
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memcpy_sse2_16(dd - 22, ss - 22);
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*((uint32_unaligned_t*)(dd - 6)) = *((uint32_unaligned_t*)(ss - 6));
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*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
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break;
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case 87:
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memcpy_sse2_64(dd - 87, ss - 87);
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case 23:
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memcpy_sse2_16(dd - 23, ss - 23);
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*((uint32_unaligned_t*)(dd - 7)) = *((uint32_unaligned_t*)(ss - 7));
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 88:
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memcpy_sse2_64(dd - 88, ss - 88);
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case 24:
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memcpy_sse2_16(dd - 24, ss - 24);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 89:
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memcpy_sse2_64(dd - 89, ss - 89);
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case 25:
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memcpy_sse2_16(dd - 25, ss - 25);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 90:
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memcpy_sse2_64(dd - 90, ss - 90);
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case 26:
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memcpy_sse2_16(dd - 26, ss - 26);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 91:
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memcpy_sse2_64(dd - 91, ss - 91);
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case 27:
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memcpy_sse2_16(dd - 27, ss - 27);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 92:
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memcpy_sse2_64(dd - 92, ss - 92);
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case 28:
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memcpy_sse2_16(dd - 28, ss - 28);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 93:
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memcpy_sse2_64(dd - 93, ss - 93);
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case 29:
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memcpy_sse2_16(dd - 29, ss - 29);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 94:
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memcpy_sse2_64(dd - 94, ss - 94);
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case 30:
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memcpy_sse2_16(dd - 30, ss - 30);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 95:
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memcpy_sse2_64(dd - 95, ss - 95);
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case 31:
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memcpy_sse2_16(dd - 31, ss - 31);
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memcpy_sse2_16(dd - 16, ss - 16);
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break;
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case 96:
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memcpy_sse2_64(dd - 96, ss - 96);
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case 32:
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memcpy_sse2_32(dd - 32, ss - 32);
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break;
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case 97:
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memcpy_sse2_64(dd - 97, ss - 97);
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case 33:
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memcpy_sse2_32(dd - 33, ss - 33);
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dd[-1] = ss[-1];
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break;
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case 98:
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memcpy_sse2_64(dd - 98, ss - 98);
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case 34:
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memcpy_sse2_32(dd - 34, ss - 34);
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*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
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break;
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case 99:
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memcpy_sse2_64(dd - 99, ss - 99);
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case 35:
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memcpy_sse2_32(dd - 35, ss - 35);
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*((uint16_unaligned_t*)(dd - 3)) = *((uint16_unaligned_t*)(ss - 3));
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dd[-1] = ss[-1];
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break;
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case 100:
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memcpy_sse2_64(dd - 100, ss - 100);
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case 36:
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memcpy_sse2_32(dd - 36, ss - 36);
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 101:
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memcpy_sse2_64(dd - 101, ss - 101);
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case 37:
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memcpy_sse2_32(dd - 37, ss - 37);
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*((uint32_unaligned_t*)(dd - 5)) = *((uint32_unaligned_t*)(ss - 5));
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dd[-1] = ss[-1];
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break;
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case 102:
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memcpy_sse2_64(dd - 102, ss - 102);
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case 38:
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memcpy_sse2_32(dd - 38, ss - 38);
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*((uint32_unaligned_t*)(dd - 6)) = *((uint32_unaligned_t*)(ss - 6));
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*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
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break;
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case 103:
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memcpy_sse2_64(dd - 103, ss - 103);
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case 39:
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memcpy_sse2_32(dd - 39, ss - 39);
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*((uint32_unaligned_t*)(dd - 7)) = *((uint32_unaligned_t*)(ss - 7));
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*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
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break;
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case 104:
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memcpy_sse2_64(dd - 104, ss - 104);
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case 40:
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memcpy_sse2_32(dd - 40, ss - 40);
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*((uint64_unaligned_t*)(dd - 8)) = *((uint64_unaligned_t*)(ss - 8));
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break;
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case 105:
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memcpy_sse2_64(dd - 105, ss - 105);
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|
case 41:
|
||
|
memcpy_sse2_32(dd - 41, ss - 41);
|
||
|
*((uint64_unaligned_t*)(dd - 9)) = *((uint64_unaligned_t*)(ss - 9));
|
||
|
dd[-1] = ss[-1];
|
||
|
break;
|
||
|
|
||
|
case 106:
|
||
|
memcpy_sse2_64(dd - 106, ss - 106);
|
||
|
case 42:
|
||
|
memcpy_sse2_32(dd - 42, ss - 42);
|
||
|
*((uint64_unaligned_t*)(dd - 10)) = *((uint64_unaligned_t*)(ss - 10));
|
||
|
*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
|
||
|
break;
|
||
|
|
||
|
case 107:
|
||
|
memcpy_sse2_64(dd - 107, ss - 107);
|
||
|
case 43:
|
||
|
memcpy_sse2_32(dd - 43, ss - 43);
|
||
|
*((uint64_unaligned_t*)(dd - 11)) = *((uint64_unaligned_t*)(ss - 11));
|
||
|
*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
|
||
|
break;
|
||
|
|
||
|
case 108:
|
||
|
memcpy_sse2_64(dd - 108, ss - 108);
|
||
|
case 44:
|
||
|
memcpy_sse2_32(dd - 44, ss - 44);
|
||
|
*((uint64_unaligned_t*)(dd - 12)) = *((uint64_unaligned_t*)(ss - 12));
|
||
|
*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
|
||
|
break;
|
||
|
|
||
|
case 109:
|
||
|
memcpy_sse2_64(dd - 109, ss - 109);
|
||
|
case 45:
|
||
|
memcpy_sse2_32(dd - 45, ss - 45);
|
||
|
*((uint64_unaligned_t*)(dd - 13)) = *((uint64_unaligned_t*)(ss - 13));
|
||
|
*((uint32_unaligned_t*)(dd - 5)) = *((uint32_unaligned_t*)(ss - 5));
|
||
|
dd[-1] = ss[-1];
|
||
|
break;
|
||
|
|
||
|
case 110:
|
||
|
memcpy_sse2_64(dd - 110, ss - 110);
|
||
|
case 46:
|
||
|
memcpy_sse2_32(dd - 46, ss - 46);
|
||
|
*((uint64_unaligned_t*)(dd - 14)) = *((uint64_unaligned_t*)(ss - 14));
|
||
|
*((uint64_unaligned_t*)(dd - 8)) = *((uint64_unaligned_t*)(ss - 8));
|
||
|
break;
|
||
|
|
||
|
case 111:
|
||
|
memcpy_sse2_64(dd - 111, ss - 111);
|
||
|
case 47:
|
||
|
memcpy_sse2_32(dd - 47, ss - 47);
|
||
|
*((uint64_unaligned_t*)(dd - 15)) = *((uint64_unaligned_t*)(ss - 15));
|
||
|
*((uint64_unaligned_t*)(dd - 8)) = *((uint64_unaligned_t*)(ss - 8));
|
||
|
break;
|
||
|
|
||
|
case 112:
|
||
|
memcpy_sse2_64(dd - 112, ss - 112);
|
||
|
case 48:
|
||
|
memcpy_sse2_32(dd - 48, ss - 48);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 113:
|
||
|
memcpy_sse2_64(dd - 113, ss - 113);
|
||
|
case 49:
|
||
|
memcpy_sse2_32(dd - 49, ss - 49);
|
||
|
memcpy_sse2_16(dd - 17, ss - 17);
|
||
|
dd[-1] = ss[-1];
|
||
|
break;
|
||
|
|
||
|
case 114:
|
||
|
memcpy_sse2_64(dd - 114, ss - 114);
|
||
|
case 50:
|
||
|
memcpy_sse2_32(dd - 50, ss - 50);
|
||
|
memcpy_sse2_16(dd - 18, ss - 18);
|
||
|
*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
|
||
|
break;
|
||
|
|
||
|
case 115:
|
||
|
memcpy_sse2_64(dd - 115, ss - 115);
|
||
|
case 51:
|
||
|
memcpy_sse2_32(dd - 51, ss - 51);
|
||
|
memcpy_sse2_16(dd - 19, ss - 19);
|
||
|
*((uint16_unaligned_t*)(dd - 3)) = *((uint16_unaligned_t*)(ss - 3));
|
||
|
dd[-1] = ss[-1];
|
||
|
break;
|
||
|
|
||
|
case 116:
|
||
|
memcpy_sse2_64(dd - 116, ss - 116);
|
||
|
case 52:
|
||
|
memcpy_sse2_32(dd - 52, ss - 52);
|
||
|
memcpy_sse2_16(dd - 20, ss - 20);
|
||
|
*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
|
||
|
break;
|
||
|
|
||
|
case 117:
|
||
|
memcpy_sse2_64(dd - 117, ss - 117);
|
||
|
case 53:
|
||
|
memcpy_sse2_32(dd - 53, ss - 53);
|
||
|
memcpy_sse2_16(dd - 21, ss - 21);
|
||
|
*((uint32_unaligned_t*)(dd - 5)) = *((uint32_unaligned_t*)(ss - 5));
|
||
|
dd[-1] = ss[-1];
|
||
|
break;
|
||
|
|
||
|
case 118:
|
||
|
memcpy_sse2_64(dd - 118, ss - 118);
|
||
|
case 54:
|
||
|
memcpy_sse2_32(dd - 54, ss - 54);
|
||
|
memcpy_sse2_16(dd - 22, ss - 22);
|
||
|
*((uint32_unaligned_t*)(dd - 6)) = *((uint32_unaligned_t*)(ss - 6));
|
||
|
*((uint16_unaligned_t*)(dd - 2)) = *((uint16_unaligned_t*)(ss - 2));
|
||
|
break;
|
||
|
|
||
|
case 119:
|
||
|
memcpy_sse2_64(dd - 119, ss - 119);
|
||
|
case 55:
|
||
|
memcpy_sse2_32(dd - 55, ss - 55);
|
||
|
memcpy_sse2_16(dd - 23, ss - 23);
|
||
|
*((uint32_unaligned_t*)(dd - 7)) = *((uint32_unaligned_t*)(ss - 7));
|
||
|
*((uint32_unaligned_t*)(dd - 4)) = *((uint32_unaligned_t*)(ss - 4));
|
||
|
break;
|
||
|
|
||
|
case 120:
|
||
|
memcpy_sse2_64(dd - 120, ss - 120);
|
||
|
case 56:
|
||
|
memcpy_sse2_32(dd - 56, ss - 56);
|
||
|
memcpy_sse2_16(dd - 24, ss - 24);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 121:
|
||
|
memcpy_sse2_64(dd - 121, ss - 121);
|
||
|
case 57:
|
||
|
memcpy_sse2_32(dd - 57, ss - 57);
|
||
|
memcpy_sse2_16(dd - 25, ss - 25);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 122:
|
||
|
memcpy_sse2_64(dd - 122, ss - 122);
|
||
|
case 58:
|
||
|
memcpy_sse2_32(dd - 58, ss - 58);
|
||
|
memcpy_sse2_16(dd - 26, ss - 26);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 123:
|
||
|
memcpy_sse2_64(dd - 123, ss - 123);
|
||
|
case 59:
|
||
|
memcpy_sse2_32(dd - 59, ss - 59);
|
||
|
memcpy_sse2_16(dd - 27, ss - 27);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 124:
|
||
|
memcpy_sse2_64(dd - 124, ss - 124);
|
||
|
case 60:
|
||
|
memcpy_sse2_32(dd - 60, ss - 60);
|
||
|
memcpy_sse2_16(dd - 28, ss - 28);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 125:
|
||
|
memcpy_sse2_64(dd - 125, ss - 125);
|
||
|
case 61:
|
||
|
memcpy_sse2_32(dd - 61, ss - 61);
|
||
|
memcpy_sse2_16(dd - 29, ss - 29);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 126:
|
||
|
memcpy_sse2_64(dd - 126, ss - 126);
|
||
|
case 62:
|
||
|
memcpy_sse2_32(dd - 62, ss - 62);
|
||
|
memcpy_sse2_16(dd - 30, ss - 30);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 127:
|
||
|
memcpy_sse2_64(dd - 127, ss - 127);
|
||
|
case 63:
|
||
|
memcpy_sse2_32(dd - 63, ss - 63);
|
||
|
memcpy_sse2_16(dd - 31, ss - 31);
|
||
|
memcpy_sse2_16(dd - 16, ss - 16);
|
||
|
break;
|
||
|
|
||
|
case 128:
|
||
|
memcpy_sse2_128(dd - 128, ss - 128);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return dst;
|
||
|
}
|
||
|
|
||
|
|
||
|
//---------------------------------------------------------------------
|
||
|
// main routine
|
||
|
//---------------------------------------------------------------------
|
||
|
static void* memcpy_fast(void *destination, const void *source, size_t size)
|
||
|
{
|
||
|
unsigned char *dst = (unsigned char*)destination;
|
||
|
const unsigned char *src = (const unsigned char*)source;
|
||
|
static size_t cachesize = 0x200000; // L2-cache size
|
||
|
size_t padding;
|
||
|
|
||
|
// small memory copy
|
||
|
if (size <= 128) {
|
||
|
return memcpy_tiny(dst, src, size);
|
||
|
}
|
||
|
|
||
|
// align destination to 16 bytes boundary
|
||
|
padding = (16 - (((size_t)dst) & 15)) & 15;
|
||
|
|
||
|
if (padding > 0) {
|
||
|
__m128i head = _mm_loadu_si128((const __m128i*)src);
|
||
|
_mm_storeu_si128((__m128i*)dst, head);
|
||
|
dst += padding;
|
||
|
src += padding;
|
||
|
size -= padding;
|
||
|
}
|
||
|
|
||
|
// medium size copy
|
||
|
if (size <= cachesize) {
|
||
|
__m128i c0, c1, c2, c3, c4, c5, c6, c7;
|
||
|
|
||
|
for (; size >= 128; size -= 128) {
|
||
|
c0 = _mm_loadu_si128(((const __m128i*)src) + 0);
|
||
|
c1 = _mm_loadu_si128(((const __m128i*)src) + 1);
|
||
|
c2 = _mm_loadu_si128(((const __m128i*)src) + 2);
|
||
|
c3 = _mm_loadu_si128(((const __m128i*)src) + 3);
|
||
|
c4 = _mm_loadu_si128(((const __m128i*)src) + 4);
|
||
|
c5 = _mm_loadu_si128(((const __m128i*)src) + 5);
|
||
|
c6 = _mm_loadu_si128(((const __m128i*)src) + 6);
|
||
|
c7 = _mm_loadu_si128(((const __m128i*)src) + 7);
|
||
|
_mm_prefetch((const char*)(src + 256), _MM_HINT_NTA);
|
||
|
src += 128;
|
||
|
_mm_store_si128((((__m128i*)dst) + 0), c0);
|
||
|
_mm_store_si128((((__m128i*)dst) + 1), c1);
|
||
|
_mm_store_si128((((__m128i*)dst) + 2), c2);
|
||
|
_mm_store_si128((((__m128i*)dst) + 3), c3);
|
||
|
_mm_store_si128((((__m128i*)dst) + 4), c4);
|
||
|
_mm_store_si128((((__m128i*)dst) + 5), c5);
|
||
|
_mm_store_si128((((__m128i*)dst) + 6), c6);
|
||
|
_mm_store_si128((((__m128i*)dst) + 7), c7);
|
||
|
dst += 128;
|
||
|
}
|
||
|
}
|
||
|
else { // big memory copy
|
||
|
__m128i c0, c1, c2, c3, c4, c5, c6, c7;
|
||
|
|
||
|
_mm_prefetch((const char*)(src), _MM_HINT_NTA);
|
||
|
|
||
|
if ((((size_t)src) & 15) == 0) { // source aligned
|
||
|
for (; size >= 128; size -= 128) {
|
||
|
c0 = _mm_load_si128(((const __m128i*)src) + 0);
|
||
|
c1 = _mm_load_si128(((const __m128i*)src) + 1);
|
||
|
c2 = _mm_load_si128(((const __m128i*)src) + 2);
|
||
|
c3 = _mm_load_si128(((const __m128i*)src) + 3);
|
||
|
c4 = _mm_load_si128(((const __m128i*)src) + 4);
|
||
|
c5 = _mm_load_si128(((const __m128i*)src) + 5);
|
||
|
c6 = _mm_load_si128(((const __m128i*)src) + 6);
|
||
|
c7 = _mm_load_si128(((const __m128i*)src) + 7);
|
||
|
_mm_prefetch((const char*)(src + 256), _MM_HINT_NTA);
|
||
|
src += 128;
|
||
|
_mm_stream_si128((((__m128i*)dst) + 0), c0);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 1), c1);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 2), c2);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 3), c3);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 4), c4);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 5), c5);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 6), c6);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 7), c7);
|
||
|
dst += 128;
|
||
|
}
|
||
|
}
|
||
|
else { // source unaligned
|
||
|
for (; size >= 128; size -= 128) {
|
||
|
c0 = _mm_loadu_si128(((const __m128i*)src) + 0);
|
||
|
c1 = _mm_loadu_si128(((const __m128i*)src) + 1);
|
||
|
c2 = _mm_loadu_si128(((const __m128i*)src) + 2);
|
||
|
c3 = _mm_loadu_si128(((const __m128i*)src) + 3);
|
||
|
c4 = _mm_loadu_si128(((const __m128i*)src) + 4);
|
||
|
c5 = _mm_loadu_si128(((const __m128i*)src) + 5);
|
||
|
c6 = _mm_loadu_si128(((const __m128i*)src) + 6);
|
||
|
c7 = _mm_loadu_si128(((const __m128i*)src) + 7);
|
||
|
_mm_prefetch((const char*)(src + 256), _MM_HINT_NTA);
|
||
|
src += 128;
|
||
|
_mm_stream_si128((((__m128i*)dst) + 0), c0);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 1), c1);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 2), c2);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 3), c3);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 4), c4);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 5), c5);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 6), c6);
|
||
|
_mm_stream_si128((((__m128i*)dst) + 7), c7);
|
||
|
dst += 128;
|
||
|
}
|
||
|
}
|
||
|
_mm_sfence();
|
||
|
}
|
||
|
|
||
|
memcpy_tiny(dst, src, size);
|
||
|
|
||
|
return destination;
|
||
|
}
|
||
|
|
||
|
|
||
|
#endif
|