内联汇编优化的TAlpha::Mask 部分汇编

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内联汇编优化版

 #ifdef _calpha_using_inlineasm_    i = Height - 1;    if (i < 0)     return;    __asm     {      mov ecx, Width      mov eax, ptrDest      mov edx, ptrSrc      mov esi, idPixelAdd      @2:      mov edi, ecx      @1:      mov bl, byte ptr [eax]      cmp bl, bmaskr      je short @3      mov bl, byte ptr [edx]      cmp bl, bmaskb      je short @4      inc edx      mov byte ptr [eax], bl      inc eax      mov bx, word ptr [edx]      mov word ptr [eax], bx      add eax, esi      add edx, isPixelAdd      jmp short @5      @4:      add eax, ld      add edx, ls      jmp short @5      @3:      mov bl, byte ptr [edx]      inc edx      mov byte ptr [eax], bl      inc eax      mov bx, word ptr [edx]      mov word ptr [eax], bx      add eax, esi      add edx, isPixelAdd      @5:      dec edi      test edi, edi      jge short @1      add eax, idLineAdd      add edx, isLineAdd      dec i      cmp i, 00000000      jge short @2     }

汇编代码

:004252C5 48          dec eax:004252C6 8945DC      mov dword ptr [ebp-24], eax ; dword ptr [ebp-24] = i:004252C9 8B4DF4      mov ecx, dword ptr [ebp-0C] ; ecx = Width:004252CC 8B45F0      mov eax, dword ptr [ebp-10] ; eax = ptrDest:004252CF 8B55EC      mov edx, dword ptr [ebp-14] ; edx = ptrSrc:004252D2 8B7514      mov esi, dword ptr [ebp+14] ; esi = idPixelAdd:004252D5 89CF        mov edi, ecx ; edi = j:004252D7 8A18        mov bl, byte ptr [eax]:004252D9 3A5DE3      cmp bl, byte ptr [ebp-1D]:004252DC 7420        je 004252FE:004252DE 8A1A        mov bl, byte ptr [edx]:004252E0 3A5DE2      cmp bl, byte ptr [ebp-1E]:004252E3 7411        je 004252F6:004252E5 42          inc edx ; ptrSrc++:004252E6 8818        mov byte ptr [eax], bl:004252E8 40          inc eax ; ptrDest++:004252E9 668B1A      mov bx, word ptr [edx]:004252EC 668918      mov word ptr [eax], bx:004252EF 01F0        add eax, esi ; ptrDest += idPixelAdd:004252F1 035510      add edx, dword ptr [ebp+10] ; ptrSrc += isPixelAdd:004252F4 EB19        jmp 0042530F:004252F6 0345E8      add eax, dword ptr [ebp-18] ; ptrDest += ld:004252F9 0355E4      add edx, dword ptr [ebp-1C] ; ptrSrc += ls:004252FC EB11        jmp 0042530F:004252FE 8A1A        mov bl, byte ptr [edx]:00425300 42          inc edx:00425301 8818        mov byte ptr [eax], bl:00425303 40          inc eax:00425304 668B1A      mov bx, word ptr [edx]:00425307 668918      mov word ptr [eax], bx:0042530A 01F0        add eax, esi:0042530C 035510      add edx, dword ptr [ebp+10]:0042530F 4F          dec edi ; j--:00425310 85FF        test edi, edi:00425312 7DC3        jge 004252D7:00425314 03451C      add eax, dword ptr [ebp+1C] ; ptrDest += idLineAdd:00425317 035518      add edx, dword ptr [ebp+18] ; ptrSrc += isLineAdd:0042531A FF4DDC      dec [ebp-24] ; i--:0042531D 837DDC00    cmp dword ptr [ebp-24], 00000000:00425321 7DB2        jge 004252D5:00425323 E98F020000  jmp 004255B7

c++代码

   #else      for (i = Height - 1; i >= 0; i--)       {        register int j = Width;        do         {          if (*ptrDest != bmaskr) //bmaskrgb[0]:Dest background color[blue part]           {            if (*ptrSrc != bmaskb) //bmaskb:Src background color[blue part]             {              *ptrDest = *ptrSrc;              ptrDest++;              ptrSrc++;              *((unsigned short int *)(ptrDest)) = *((unsigned short int *)(ptrSrc));              ptrDest += idPixelAdd;              ptrSrc += isPixelAdd;             }            else             {              ptrDest += ld;              ptrSrc += ls;             }           }          else           {            *ptrDest = *ptrSrc;            ptrDest++;            ptrSrc++;            *((unsigned short int *)(ptrDest)) = *((unsigned short int *)(ptrSrc));            ptrDest += idPixelAdd;            ptrSrc += isPixelAdd;           }          j--;         }while(j >= 0);        ptrDest += idLineAdd;        ptrSrc += isLineAdd;       }   #endif

汇编代码

:004252B8 4B            dec ebx ; i = Height - 1:004252B9 895DE8        mov dword ptr [ebp-18], ebx ; dword ptr [ebp-18] = i:004252BC 837DE800      cmp dword ptr [ebp-18], 00000000 ; for 的判断, inline asm 去掉了:004252C0 0F8C90020000  jl 00425556:004252C6 8BF9          mov edi, ecx ; j = Width:004252C8 8A18          mov bl, byte ptr [eax]:004252CA 3A5DEF        cmp bl, byte ptr [ebp-11]:004252CD 7422          je 004252F1:004252CF 8A1A          mov bl, byte ptr [edx]:004252D1 3A5DEE        cmp bl, byte ptr [ebp-12]:004252D4 7413          je 004252E9:004252D6 8A1A          mov bl, byte ptr [edx] ; 重复, inline asm 去掉了:004252D8 42            inc edx:004252D9 8818          mov byte ptr [eax], bl:004252DB 40            inc eax:004252DC 668B1A        mov bx, word ptr [edx]:004252DF 668918        mov word ptr [eax], bx:004252E2 03C6          add eax, esi:004252E4 035510        add edx, dword ptr [ebp+10]:004252E7 EB19          jmp 00425302:004252E9 0345F4        add eax, dword ptr [ebp-0C]:004252EC 0355F0        add edx, dword ptr [ebp-10]:004252EF EB11          jmp 00425302:004252F1 8A1A          mov bl, byte ptr [edx]:004252F3 42            inc edx:004252F4 8818          mov byte ptr [eax], bl:004252F6 40            inc eax:004252F7 668B1A        mov bx, word ptr [edx]:004252FA 668918        mov word ptr [eax], bx:004252FD 03C6          add eax, esi:004252FF 035510        add edx, dword ptr [ebp+10]:00425302 4F            dec edi ; j--:00425303 85FF          test edi, edi:00425305 7DC1          jge 004252C8:00425307 03451C        add eax, dword ptr [ebp+1C]:0042530A 035518        add edx, dword ptr [ebp+18]:0042530D FF4DE8        dec [ebp-18] ; i--:00425310 837DE800      cmp dword ptr [ebp-18], 00000000:00425314 7DB0          jge 004252C6:00425316 E93B020000    jmp 00425556