mirror of
https://github.com/gnif/LookingGlass.git
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NASM version of a SSE2 memcpy
This commit is contained in:
Geoffrey McRae
parent
ffec6c2014
commit
3c77c1eb2b
312
common/memcpySSE.asm
Normal file
312
common/memcpySSE.asm
Normal file
@ -0,0 +1,312 @@
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.code
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memcpySSE proc
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; dst = rcx
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; src = rdx
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; len = r8
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test r8 , r8
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jne OK
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ret
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OK:
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; void * end = dst + (length & ~0x100);
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; end = r10
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mov r9 , r8
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and r9 , -0100h
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mov r10, rcx
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add r10, r9
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; size_t rem = (length & 0xFF) >> 4);
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; rem = r11
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mov r11, r8
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and r11, 0FFh
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shr r11, 4
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sub rsp, 8 + 10*16 + 4*8
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movdqa oword ptr [rsp + 4*8 + 00 ], xmm6
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movdqa oword ptr [rsp + 4*8 + 16 ], xmm7
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movdqa oword ptr [rsp + 4*8 + 32 ], xmm8
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movdqa oword ptr [rsp + 4*8 + 48 ], xmm9
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movdqa oword ptr [rsp + 4*8 + 64 ], xmm10
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movdqa oword ptr [rsp + 4*8 + 80 ], xmm11
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movdqa oword ptr [rsp + 4*8 + 96 ], xmm12
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movdqa oword ptr [rsp + 4*8 + 112], xmm13
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movdqa oword ptr [rsp + 4*8 + 128], xmm14
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movdqa oword ptr [rsp + 4*8 + 144], xmm15
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cmp rcx, r10
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je RemainingBlocks
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FullLoop:
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vmovaps xmm0 , xmmword ptr [rdx + 000h]
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vmovaps xmm1 , xmmword ptr [rdx + 010h]
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vmovaps xmm2 , xmmword ptr [rdx + 020h]
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vmovaps xmm3 , xmmword ptr [rdx + 030h]
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vmovaps xmm4 , xmmword ptr [rdx + 040h]
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vmovaps xmm5 , xmmword ptr [rdx + 050h]
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vmovaps xmm6 , xmmword ptr [rdx + 060h]
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vmovaps xmm7 , xmmword ptr [rdx + 070h]
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vmovaps xmm8 , xmmword ptr [rdx + 080h]
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vmovaps xmm9 , xmmword ptr [rdx + 090h]
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vmovaps xmm10, xmmword ptr [rdx + 0A0h]
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vmovaps xmm11, xmmword ptr [rdx + 0B0h]
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vmovaps xmm12, xmmword ptr [rdx + 0C0h]
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vmovaps xmm13, xmmword ptr [rdx + 0D0h]
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vmovaps xmm14, xmmword ptr [rdx + 0E0h]
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vmovaps xmm15, xmmword ptr [rdx + 0F0h]
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vmovntdq xmmword ptr [rcx + 000h], xmm0
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vmovntdq xmmword ptr [rcx + 010h], xmm1
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vmovntdq xmmword ptr [rcx + 020h], xmm2
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vmovntdq xmmword ptr [rcx + 030h], xmm3
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vmovntdq xmmword ptr [rcx + 040h], xmm4
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vmovntdq xmmword ptr [rcx + 050h], xmm5
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vmovntdq xmmword ptr [rcx + 060h], xmm6
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vmovntdq xmmword ptr [rcx + 070h], xmm7
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vmovntdq xmmword ptr [rcx + 080h], xmm8
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vmovntdq xmmword ptr [rcx + 090h], xmm9
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vmovntdq xmmword ptr [rcx + 0A0h], xmm10
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vmovntdq xmmword ptr [rcx + 0B0h], xmm11
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vmovntdq xmmword ptr [rcx + 0C0h], xmm12
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vmovntdq xmmword ptr [rcx + 0D0h], xmm13
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vmovntdq xmmword ptr [rcx + 0E0h], xmm14
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vmovntdq xmmword ptr [rcx + 0F0h], xmm15
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add rdx, 0100h
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add rcx, 0100h
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cmp rcx, r10
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jne FullLoop
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RemainingBlocks:
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lea r9 , JumpTable
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mov r10, 15
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sub r10, r11
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imul r10, 5
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add r9 , r10
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jmp r9
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JumpTable:
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jmp Block15
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jmp Block14
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jmp Block13
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jmp Block12
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jmp Block11
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jmp Block10
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jmp Block9
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jmp Block8
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jmp Block7
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jmp Block6
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jmp Block5
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jmp Block4
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jmp Block3
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jmp Block2
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jmp Block1
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jmp Block0
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; ensure we generate near jumps
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padding1 db 127 dup(090h)
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Block15:
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vmovaps xmm14, xmmword ptr [rdx + 0E0h]
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vmovntdq xmmword ptr [rcx + 0E0h], xmm14
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Block14:
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vmovaps xmm13, xmmword ptr [rdx + 0D0h]
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vmovntdq xmmword ptr [rcx + 0D0h], xmm13
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Block13:
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vmovaps xmm12, xmmword ptr [rdx + 0C0h]
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vmovntdq xmmword ptr [rcx + 0C0h], xmm12
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Block12:
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vmovaps xmm11, xmmword ptr [rdx + 0B0h]
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vmovntdq xmmword ptr [rcx + 0B0h], xmm11
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Block11:
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vmovaps xmm10, xmmword ptr [rdx + 0A0h]
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vmovntdq xmmword ptr [rcx + 0A0h], xmm10
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Block10:
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vmovaps xmm9 , xmmword ptr [rdx + 090h]
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vmovntdq xmmword ptr [rcx + 090h], xmm9
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Block9:
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vmovaps xmm8 , xmmword ptr [rdx + 080h]
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vmovntdq xmmword ptr [rcx + 080h], xmm8
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Block8:
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vmovaps xmm7 , xmmword ptr [rdx + 070h]
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vmovntdq xmmword ptr [rcx + 070h], xmm7
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Block7:
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vmovaps xmm6 , xmmword ptr [rdx + 060h]
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vmovntdq xmmword ptr [rcx + 060h], xmm6
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Block6:
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vmovaps xmm5 , xmmword ptr [rdx + 050h]
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vmovntdq xmmword ptr [rcx + 050h], xmm5
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Block5:
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vmovaps xmm4 , xmmword ptr [rdx + 040h]
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vmovntdq xmmword ptr [rcx + 040h], xmm4
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Block4:
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vmovaps xmm3 , xmmword ptr [rdx + 030h]
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vmovntdq xmmword ptr [rcx + 030h], xmm3
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Block3:
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vmovaps xmm2 , xmmword ptr [rdx + 020h]
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vmovntdq xmmword ptr [rcx + 020h], xmm2
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Block2:
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vmovaps xmm1 , xmmword ptr [rdx + 010h]
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vmovntdq xmmword ptr [rcx + 010h], xmm1
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Block1:
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vmovaps xmm0 , xmmword ptr [rdx + 000h]
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vmovntdq xmmword ptr [rcx + 000h], xmm0
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imul r11, 16
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add rdx, r11
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add rcx, r11
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Block0:
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movdqa xmm6 , oword ptr [rsp + 4*8 + 00 ]
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movdqa xmm7 , oword ptr [rsp + 4*8 + 16 ]
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movdqa xmm8 , oword ptr [rsp + 4*8 + 32 ]
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movdqa xmm9 , oword ptr [rsp + 4*8 + 48 ]
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movdqa xmm10, oword ptr [rsp + 4*8 + 64 ]
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movdqa xmm11, oword ptr [rsp + 4*8 + 80 ]
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movdqa xmm12, oword ptr [rsp + 4*8 + 96 ]
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movdqa xmm13, oword ptr [rsp + 4*8 + 112]
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movdqa xmm14, oword ptr [rsp + 4*8 + 128]
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movdqa xmm15, oword ptr [rsp + 4*8 + 144]
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add rsp, 8 + 10*16 + 4*8
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and r8, 0Fh
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imul r8, 5
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lea r9, CopyTable
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add r9, r8
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jmp r9
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CopyTable:
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ret
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nop
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nop
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nop
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nop
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jmp Copy1
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jmp Copy2
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jmp Copy3
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jmp Copy4
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jmp Copy5
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jmp Copy6
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jmp Copy7
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jmp Copy8
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jmp Copy9
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jmp Copy10
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jmp Copy11
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jmp Copy12
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jmp Copy13
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jmp Copy14
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; copy 15
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mov r8 , qword ptr [rdx + 00h]
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mov r9d , dword ptr [rdx + 08h]
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mov r10w, word ptr [rdx + 0Ch]
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mov al , byte ptr [rdx + 0Eh]
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mov qword ptr [rcx + 00h], r8
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mov dword ptr [rcx + 08h], r9d
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mov word ptr [rcx + 0Ch], r10w
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mov byte ptr [rcx + 0Eh], al
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ret
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; ensure we generate near jumps
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padding2 db 127 dup(090h)
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Copy1:
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mov al, byte ptr [rdx]
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mov byte ptr [rcx], al
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ret
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Copy2:
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mov r10w, word ptr [rdx]
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mov word ptr [rcx], r10w
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ret
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Copy3:
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mov r10w, word ptr [rdx]
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mov word ptr [rcx], r10w
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mov al, byte ptr [rdx + 02h]
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mov byte ptr [rcx + 02h], al
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ret
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Copy4:
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mov r9d , dword ptr [rdx]
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mov dword ptr [rcx], r9d
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ret
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Copy5:
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mov r9d , dword ptr [rdx]
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mov dword ptr [rcx], r9d
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mov al, byte ptr [rdx + 04h]
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mov byte ptr [rcx + 04h], al
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ret
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Copy6:
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mov r9d , dword ptr [rdx]
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mov dword ptr [rcx], r9d
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mov r10w, word ptr [rdx + 04h]
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mov word ptr [rcx + 04h], r10w
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ret
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Copy7:
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mov r9d , dword ptr [rdx]
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mov dword ptr [rcx], r9d
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mov r10w, word ptr [rdx + 04h]
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mov word ptr [rcx + 04h], r10w
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mov al, byte ptr [rdx + 06h]
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mov byte ptr [rcx + 06h], al
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ret
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Copy8:
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mov r8, qword ptr [rdx]
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mov qword ptr [rcx], r8
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ret
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Copy9:
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mov r8, qword ptr [rdx]
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mov qword ptr [rcx], r8
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mov al, byte ptr [rdx + 08h]
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mov byte ptr [rcx + 08h], al
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ret
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Copy10:
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mov r8, qword ptr [rdx]
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mov qword ptr [rcx], r8
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mov r10w, word ptr [rdx + 08h]
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mov word ptr [rcx + 08h], r10w
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ret
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Copy11:
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mov r8, qword ptr [rdx]
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mov qword ptr [rcx], r8
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mov r10w, word ptr [rdx + 08h]
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mov word ptr [rcx + 08h], r10w
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mov al, byte ptr [rdx + 0Ah]
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mov byte ptr [rcx + 0Ah], al
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ret
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Copy12:
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mov r8, qword ptr [rdx]
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mov qword ptr [rcx], r8
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mov r9d , dword ptr [rdx + 08h]
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mov dword ptr [rcx + 08h], r9d
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ret
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Copy13:
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mov r8, qword ptr [rdx]
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mov qword ptr [rcx], r8
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mov r9d , dword ptr [rdx + 08h]
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mov dword ptr [rcx + 08h], r9d
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mov al, byte ptr [rdx + 0Ch]
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mov byte ptr [rcx + 0Ch], al
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ret
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Copy14:
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mov r8 , qword ptr [rdx ]
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mov r9d , dword ptr [rdx + 08h]
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mov r10w, word ptr [rdx + 0Ch]
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mov qword ptr [rcx ], r8
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mov dword ptr [rcx + 08h], r9d
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mov word ptr [rcx + 0Ch], r10w
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ret
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memcpySSE endp
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end
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@ -26,6 +26,7 @@ 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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#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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@ -79,7 +80,7 @@ inline static void memcpySSE(void *dst, const void * src, size_t length)
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OP(add %[rem],%[end])
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OP(jmp *%[end])
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// jump table
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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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@ -95,28 +96,28 @@ inline static void memcpySSE(void *dst, const void * src, size_t length)
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OP(vmovaps 0x00(%[src]),%%xmm6)
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OP(vmovntdq %%xmm6,0x00(%[dst]))
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// alignment as the previous two instructions are only 4 bytes
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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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// restore the registers
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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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:
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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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);
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//copy any remaining bytes
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@ -126,4 +127,7 @@ inline static void memcpySSE(void *dst, const void * src, size_t length)
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#else
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memcpy(dst, src, length);
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#endif
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}
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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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#endif
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