mirror of
https://github.com/gnif/LookingGlass.git
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[common] new sse2 memcpy improvements
This commit is contained in:
Geoffrey McRae
parent
3c77c1eb2b
commit
f63c8043af
@ -26,98 +26,150 @@ Place, Suite 330, Boston, MA 02111-1307 USA
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#include "debug.h"
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#if defined(__GNUC___) || defined(__GNUG__)
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#if defined(__GNUC__) || defined(__GNUG__)
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#define OP(...) #__VA_ARGS__ "\n\t"
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inline static void memcpySSE(void *dst, const void * src, size_t length)
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{
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#if defined(__x86_64__) || defined(__i386__)
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#if !defined(NATIVE_MEMCPY) && (defined(__x86_64__) || defined(__i386__))
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if (length == 0 || dst == src)
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return;
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#ifdef __x86_64__
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void * end = dst + (length & ~0xFF);
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size_t off = (15 - ((length & 0xFF) >> 4));
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off = (off < 8) ? off * 16 : 7 * 16 + (off - 7) * 10;
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#else
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void * end = dst + (length & ~0x7F);
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size_t rem = (7 - ((length & 0x7F) >> 4)) * 10;
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size_t off = (7 - ((length & 0x7F) >> 4)) * 10;
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#endif
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__asm__ __volatile__ (
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// save the registers we intend to alter, failure to do so causes problems
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// when gcc -O3 is used
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OP(push %[dst])
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OP(push %[src])
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OP(push %[end])
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"cmp %[dst],%[end] \n\t"
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"je Remain_%= \n\t"
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// perform 128 byte SIMD block copy
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OP(cmp %[dst],%[end])
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OP(je ramain_%=)
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OP(loop_%=:)
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OP(vmovaps 0x00(%[src]),%%xmm0)
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OP(vmovaps 0x10(%[src]),%%xmm1)
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OP(vmovaps 0x20(%[src]),%%xmm2)
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OP(vmovaps 0x30(%[src]),%%xmm3)
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OP(vmovaps 0x40(%[src]),%%xmm4)
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OP(vmovaps 0x50(%[src]),%%xmm5)
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OP(vmovaps 0x60(%[src]),%%xmm6)
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OP(vmovaps 0x70(%[src]),%%xmm7)
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OP(vmovntdq %%xmm0,0x00(%[dst]))
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OP(vmovntdq %%xmm1,0x10(%[dst]))
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OP(vmovntdq %%xmm2,0x20(%[dst]))
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OP(vmovntdq %%xmm3,0x30(%[dst]))
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OP(vmovntdq %%xmm4,0x40(%[dst]))
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OP(vmovntdq %%xmm5,0x50(%[dst]))
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OP(vmovntdq %%xmm6,0x60(%[dst]))
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OP(vmovntdq %%xmm7,0x70(%[dst]))
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OP(add $0x80,%[dst])
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OP(add $0x80,%[src])
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OP(cmp %[dst],%[end])
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OP(jne loop_%=)
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// copy any remaining 16 byte blocks
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OP(remain_%=:)
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// perform SIMD block copy
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"loop_%=: \n\t"
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"vmovaps 0x00(%[src]),%%xmm0 \n\t"
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"vmovaps 0x10(%[src]),%%xmm1 \n\t"
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"vmovaps 0x20(%[src]),%%xmm2 \n\t"
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"vmovaps 0x30(%[src]),%%xmm3 \n\t"
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"vmovaps 0x40(%[src]),%%xmm4 \n\t"
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"vmovaps 0x50(%[src]),%%xmm5 \n\t"
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"vmovaps 0x60(%[src]),%%xmm6 \n\t"
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"vmovaps 0x70(%[src]),%%xmm7 \n\t"
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#ifdef __x86_64__
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OP(leaq (%%rip), %[end])
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OP(add $10,%[end])
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#else
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OP(call .+5)
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OP(pop %[end])
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OP(add $8,%[end])
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"vmovaps 0x80(%[src]),%%xmm8 \n\t"
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"vmovaps 0x90(%[src]),%%xmm9 \n\t"
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"vmovaps 0xA0(%[src]),%%xmm10 \n\t"
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"vmovaps 0xB0(%[src]),%%xmm11 \n\t"
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"vmovaps 0xC0(%[src]),%%xmm12 \n\t"
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"vmovaps 0xD0(%[src]),%%xmm13 \n\t"
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"vmovaps 0xE0(%[src]),%%xmm14 \n\t"
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"vmovaps 0xF0(%[src]),%%xmm15 \n\t"
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#endif
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OP(add %[rem],%[end])
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OP(jmp *%[end])
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"vmovntdq %%xmm0 ,0x00(%[dst]) \n\t"
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"vmovntdq %%xmm1 ,0x10(%[dst]) \n\t"
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"vmovntdq %%xmm2 ,0x20(%[dst]) \n\t"
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"vmovntdq %%xmm3 ,0x30(%[dst]) \n\t"
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"vmovntdq %%xmm4 ,0x40(%[dst]) \n\t"
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"vmovntdq %%xmm5 ,0x50(%[dst]) \n\t"
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"vmovntdq %%xmm6 ,0x60(%[dst]) \n\t"
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"vmovntdq %%xmm7 ,0x70(%[dst]) \n\t"
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#ifdef __x86_64__
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"vmovntdq %%xmm8 ,0x80(%[dst]) \n\t"
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"vmovntdq %%xmm9 ,0x90(%[dst]) \n\t"
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"vmovntdq %%xmm10,0xA0(%[dst]) \n\t"
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"vmovntdq %%xmm11,0xB0(%[dst]) \n\t"
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"vmovntdq %%xmm12,0xC0(%[dst]) \n\t"
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"vmovntdq %%xmm13,0xD0(%[dst]) \n\t"
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"vmovntdq %%xmm14,0xE0(%[dst]) \n\t"
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"vmovntdq %%xmm15,0xF0(%[dst]) \n\t"
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// jump table
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OP(vmovaps 0x60(%[src]),%%xmm0)
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OP(vmovntdq %%xmm0,0x60(%[dst]))
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OP(vmovaps 0x50(%[src]),%%xmm1)
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OP(vmovntdq %%xmm1,0x50(%[dst]))
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OP(vmovaps 0x40(%[src]),%%xmm2)
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OP(vmovntdq %%xmm2,0x40(%[dst]))
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OP(vmovaps 0x30(%[src]),%%xmm3)
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OP(vmovntdq %%xmm3,0x30(%[dst]))
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OP(vmovaps 0x20(%[src]),%%xmm4)
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OP(vmovntdq %%xmm4,0x20(%[dst]))
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OP(vmovaps 0x10(%[src]),%%xmm5)
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OP(vmovntdq %%xmm5,0x10(%[dst]))
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OP(vmovaps 0x00(%[src]),%%xmm6)
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OP(vmovntdq %%xmm6,0x00(%[dst]))
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"add $0x100,%[dst] \n\t"
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"add $0x100,%[src] \n\t"
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#else
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"add $0x80,%[dst] \n\t"
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"add $0x80,%[src] \n\t"
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#endif
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"cmp %[dst],%[end] \n\t"
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"jne loop_%= \n\t"
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// alignment as the previous two instructions are only 4 bytes
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OP(nop)
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OP(nop)
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"Remain_%=: \n\t"
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// restore the registers
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OP(pop %[end])
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OP(pop %[src])
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OP(pop %[dst])
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:
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: [dst]"r" (dst),
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[src]"r" (src),
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[end]"c" (end),
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[rem]"d" (rem)
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: "xmm0",
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"xmm1",
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"xmm2",
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"xmm3",
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"xmm4",
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"xmm5",
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"xmm6",
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"xmm7",
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"memory"
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// copy any remaining 16 byte blocks
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#ifdef __x86_64__
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"leaq (%%rip), %[end]\n\t"
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"Offset_%=:\n\t"
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#else
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"call .+5 \n\t"
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"Offset_%=:\n\t"
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"pop %[end] \n\t"
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#endif
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"add $(BlockTable_%= - Offset_%=), %[end]\n\t"
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"add %[off],%[end] \n\t"
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"jmp *%[end] \n\t"
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"BlockTable_%=:\n\t"
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#ifdef __x86_64__
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"vmovaps 0xE0(%[src]),%%xmm14 \n\t"
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"vmovntdq %%xmm14,0xE0(%[dst]) \n\t"
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"vmovaps 0xD0(%[src]),%%xmm13 \n\t"
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"vmovntdq %%xmm13,0xD0(%[dst]) \n\t"
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"vmovaps 0xC0(%[src]),%%xmm12 \n\t"
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"vmovntdq %%xmm12,0xC0(%[dst]) \n\t"
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"vmovaps 0xB0(%[src]),%%xmm11 \n\t"
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"vmovntdq %%xmm11,0xB0(%[dst]) \n\t"
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"vmovaps 0xA0(%[src]),%%xmm10 \n\t"
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"vmovntdq %%xmm10,0xA0(%[dst]) \n\t"
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"vmovaps 0x90(%[src]),%%xmm9 \n\t"
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"vmovntdq %%xmm9 ,0x90(%[dst]) \n\t"
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"vmovaps 0x80(%[src]),%%xmm8 \n\t"
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"vmovntdq %%xmm8 ,0x80(%[dst]) \n\t"
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"vmovaps 0x70(%[src]),%%xmm7 \n\t"
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"vmovntdq %%xmm7 ,0x70(%[dst]) \n\t"
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#endif
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"vmovaps 0x60(%[src]),%%xmm6 \n\t"
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"vmovntdq %%xmm6 ,0x60(%[dst]) \n\t"
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"vmovaps 0x50(%[src]),%%xmm5 \n\t"
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"vmovntdq %%xmm5 ,0x50(%[dst]) \n\t"
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"vmovaps 0x40(%[src]),%%xmm4 \n\t"
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"vmovntdq %%xmm4 ,0x40(%[dst]) \n\t"
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"vmovaps 0x30(%[src]),%%xmm3 \n\t"
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"vmovntdq %%xmm3 ,0x30(%[dst]) \n\t"
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"vmovaps 0x20(%[src]),%%xmm2 \n\t"
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"vmovntdq %%xmm2 ,0x20(%[dst]) \n\t"
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"vmovaps 0x10(%[src]),%%xmm1 \n\t"
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"vmovntdq %%xmm1 ,0x10(%[dst]) \n\t"
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"vmovaps 0x00(%[src]),%%xmm0 \n\t"
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"vmovntdq %%xmm0 ,0x00(%[dst]) \n\t"
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"nop\n\t"
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"nop\n\t"
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: [dst]"+r" (dst),
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[src]"+r" (src),
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[end]"+r" (end)
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: [off]"r" (off)
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: "xmm0",
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"xmm1",
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"xmm2",
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"xmm3",
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"xmm4",
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"xmm5",
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"xmm6",
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"xmm7",
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#ifdef __x86_64__
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"xmm8",
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"xmm9",
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"xmm10",
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"xmm11",
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"xmm12",
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"xmm13",
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"xmm14",
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"xmm15",
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#endif
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"memory"
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);
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//copy any remaining bytes
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@ -129,5 +181,5 @@ inline static void memcpySSE(void *dst, const void * src, size_t length)
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#endif
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}
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#else
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extern "C" void __fastcall memcpySSE(void *dst, const void * src, size_t length);
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extern "C" void memcpySSE(void *dst, const void * src, size_t length);
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#endif
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