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[common] unroll the framebuffer write loop and increase the chunk size
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parent
9e3a42cb62
commit
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2 changed files with 35 additions and 7 deletions
2
VERSION
2
VERSION
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@ -1 +1 @@
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B2-rc2-16-g62d1bd1ea2+1
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B2-rc2-17-gaa32c5ffad+1
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@ -25,7 +25,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
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#include <emmintrin.h>
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#include <emmintrin.h>
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#include <smmintrin.h>
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#include <smmintrin.h>
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#define FB_CHUNK_SIZE 1024
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#define FB_CHUNK_SIZE 1048576
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struct stFrameBuffer
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struct stFrameBuffer
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{
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{
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@ -112,22 +112,50 @@ void framebuffer_prepare(FrameBuffer * frame)
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bool framebuffer_write(FrameBuffer * frame, const void * src, size_t size)
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bool framebuffer_write(FrameBuffer * frame, const void * src, size_t size)
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{
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{
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__m128i * s = (__m128i *)src;
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__m128i * s = (__m128i *)src;
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__m128i * d = (__m128i *)frame->data;
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size_t wp = 0;
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size_t wp = 0;
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/* copy in chunks */
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/* copy in chunks */
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while(size > 15)
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while(size > 63)
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{
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{
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_mm_stream_si128((__m128i *)(frame->data + wp), _mm_stream_load_si128(s++));
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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size -= 16;
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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wp += 16;
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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size -= 64;
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wp += 64;
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if (wp % FB_CHUNK_SIZE == 0)
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if (wp % FB_CHUNK_SIZE == 0)
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atomic_store_explicit(&frame->wp, wp, memory_order_release);
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atomic_store_explicit(&frame->wp, wp, memory_order_release);
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}
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}
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if (size > 47)
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{
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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size -= 48;
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wp += 48;
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}
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if (size > 31)
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{
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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size -= 32;
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wp += 32;
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}
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if (size > 15)
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{
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_mm_stream_si128(d++, _mm_stream_load_si128(s++));
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size -= 16;
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wp += 16;
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}
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if(size)
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if(size)
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{
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{
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memcpy(frame->data + frame->wp, s, size);
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memcpy(frame->data + wp, s, size);
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wp += size;
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wp += size;
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}
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}
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