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ReorderingMTGS: Linux asm memcpy fixes. (untested) 

git-svn-id: http://pcsx2.googlecode.com/svn/branches/ReorderingMTGS@3488 96395faa-99c1-11dd-bbfe-3dabce05a288
This commit is contained in:
Jake.Stine 2010-07-14 14:23:59 +00:00
parent 6ded71561c
commit e793f91993
1 changed files with 36 additions and 36 deletions
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72
common/include/Utilities/MemcpyFast.h
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@ -48,62 +48,62 @@
//"mov ecx, [%[dest]]\n"
//"mov edx, [%[src]]\n"
//"mov eax, [%[qwc]]\n" // keep a copy of count
"shr %[qwc], 1\n"
"jz memcpy_qwc_1\n" // only one 16 byte block to copy?
"cmp %[qwc], 1\n"
"jbe memcpy_qwc_1\n" // only one 16 byte block to copy?
"cmp %[qwc], 64\n" // "IN_CACHE_COPY/32"
"jb memcpy_qwc_loop1\n" // small copies should be cached (definite speedup --air)
"cmp %[qwc], 128\n" // "IN_CACHE_COPY/16"
"jb memcpy_qwc_loop1\n" // small copies should be cached (definite speedup --air)
"memcpy_qwc_loop2:\n" // 32-byte blocks, uncached copy
"prefetchnta [%[src] + 568]\n" // start reading ahead (tested: it helps! --air)
"memcpy_qwc_loop2:\n" // 32-byte blocks, uncached copy
"prefetchnta [%[src] + 568]\n" // start reading ahead (tested: it helps! --air)
"movq mm0,[%[src]+0]\n" // read 64 bits
"movq mm1,[%[src]+8]\n"
"movq mm2,[%[src]+16]\n"
"movntq [%[dest]+0], mm0\n" // write 64 bits, bypassing the cache
"movntq [%[dest]+8], mm1\n"
"movq mm3,[%[src]+24]\n"
"movntq [%[dest]+16], mm2\n"
"movntq [%[dest]+24], mm3\n"
"movq mm0,[%[src]+0]\n" // read 64 bits
"movq mm1,[%[src]+8]\n"
"movq mm2,[%[src]+16]\n"
"movntq [%[dest]+0], mm0\n" // write 64 bits, bypassing the cache
"movntq [%[dest]+8], mm1\n"
"movq mm3,[%[src]+24]\n"
"movntq [%[dest]+16], mm2\n"
"movntq [%[dest]+24], mm3\n"
"add %[src],32\n" // update source pointer
"add %[dest],32\n" // update destination pointer
"sub %[qwc],1\n"
"jnz memcpy_qwc_loop2\n" // last 64-byte block?
"sfence\n" // flush the write buffer
"sub %[qwc],2\n"
"jnz memcpy_qwc_loop2\n" // last 64-byte block?
"sfence\n" // flush the write buffer
"jmp memcpy_qwc_1\n"
// 32-byte blocks, cached!
// This *is* important. Removing this and using exclusively non-temporal stores
// results in noticable speed loss!
// results in noticeable speed loss!
"memcpy_qwc_loop1:\n"
"prefetchnta [%[src] + 568]\n" // start reading ahead (tested: it helps! --air)
"prefetchnta [%[src] + 568]\n" // start reading ahead (tested: it helps! --air)
"movq mm0,[%[src]+0]\n" // read 64 bits
"movq mm1,[%[src]+8]\n"
"movq mm2,[%[src]+16]\n"
"movq [%[dest]+0], mm0\n" // write 64 bits, bypassing the cache
"movq [%[dest]+8], mm1\n"
"movq mm3,[%[src]+24]\n"
"movq [%[dest]+16], mm2\n"
"movq [%[dest]+24], mm3\n"
"movq mm0,[%[src]+0]\n" // read 64 bits
"movq mm1,[%[src]+8]\n"
"movq mm2,[%[src]+16]\n"
"movq [%[dest]+0], mm0\n" // write 64 bits, bypassing the cache
"movq [%[dest]+8], mm1\n"
"movq mm3,[%[src]+24]\n"
"movq [%[dest]+16], mm2\n"
"movq [%[dest]+24], mm3\n"
"add %[src],32\n" // update source pointer
"add %[dest],32\n" // update destination pointer
"sub %[qwc],1\n"
"jnz memcpy_qwc_loop1\n" // last 64-byte block?
"sub %[qwc],2\n"
"jnz memcpy_qwc_loop1\n" // last 64-byte block?
"memcpy_qwc_1:\n"
"test [%[qwc]],dword ptr 1\n"
"jz memcpy_qwc_final\n"
"movq mm0,[%[src]]\n"
"movq mm1,[%[src]+8]\n"
"movq [%[dest]], mm0\n"
"movq [%[dest]+8], mm1\n"
"test [%qwc],1\n"
"jz memcpy_qwc_final\n"
"movq mm0,[%[src]]\n"
"movq mm1,[%[src]+8]\n"
"movq [%[dest]], mm0\n"
"movq [%[dest]+8], mm1\n"
"memcpy_qwc_final:\n"
"emms\n" // clean up the MMX state
"emms\n" // clean up the MMX state
".att_syntax\n"
: "=&r"(dest), "=&r"(src), "=&r"(qwc)
: [dest]"0"(dest), [src]"1"(src), [qwc]"2"(qwc)