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- ;------------------------------------------------
- XmmRowSADParams STRUC
- dd ? ;1 pushed regs
- dd ? ;return address
- NewDataPtr dd ?
- RefDataPtr dd ?
- XmmRowSADParams ENDS
- ;------------------------------------------------
- INCLUDE iaxmm.inc
-
- .586
- .387
- .MODEL flat, SYSCALL, os_dos
- .MMX
- ; macros
- .DATA
- TORQ_CX_DATA SEGMENT PAGE PUBLIC USE32 'DATA'
- ALIGN 32
- .CODE
- NAME XmmRowSAD
- PUBLIC XmmRowSAD_
- PUBLIC _XmmRowSAD
-
-
- ;------------------------------------------------
- ; local vars
- LOCAL_SPACE EQU 0
- ;------------------------------------------------
- ;UINT32 XmmRowSAD( UINT8 * NewDataPtr, UINT8 * RefDataPtr)
- ;
- XmmRowSAD_:
- _XmmRowSAD:
- push ebx
- mov eax,(XmmRowSADParams PTR [esp]).NewDataPtr ; Load base addresses
- mov ebx,(XmmRowSADParams PTR [esp]).RefDataPtr
-
- ;
- ; ESP = Stack Pointer MM0 = Free
- ; ESI = Free MM1 = Free
- ; EDI = Free MM2 = Free
- ; EBP = Free MM3 = Free
- ; EBX = RefDataPtr MM4 = Free
- ; ECX = PixelsPerLine MM5 = Free
- ; EDX = PixelsPerLine + STRIDE_EXTRA MM6 = Free
- ; EAX = NewDataPtr MM7 = Free
- ;
- movq mm0, QWORD PTR [eax] ; copy eight bytes from NewDataPtr to mm0
- movq mm3, QWORD PTR [ebx] ; copy eight bytes from ReconDataPtr to mm3
-
- pxor mm1, mm1 ; clear mm1 for unpacking
- movq mm2, mm0 ; make a copy
- movq mm4, mm3 ; make a copy
- punpcklbw mm0, mm1 ; unpack the lower four bytes
- punpcklbw mm3, mm1 ; unpack the lower four bytes
- psadbw mm0, mm3 ; sum of absolute difference of four bytes
- punpckhbw mm2, mm1 ; unpack the higher four bytes
- punpckhbw mm4, mm1 ; unpack the higher four bytes
- psadbw mm2, mm4 ; sum of absolute difference of another four
- pop ebx
- pmaxsw mm0, mm2 ; get the max
- movd eax, mm0 ; return value
- ret
- ;************************************************
- END
- END
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