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48 lines (38 loc) · 745 Bytes
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ipx.asm
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48 lines (38 loc) · 745 Bytes
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%include "param.mac"
; GLOBAL Function*************************************************************
;*** IPX
GLOBAL _ReverseBuffBytes
; GLOBAL DATA*****************************************************************
;*** IPX
ALIGN 32
SECTION .text
[BITS 32]
;*** IPX
_ReverseBuffBytes:
ARG BuffPtr, 4, BuffSize, 4
MOVD mm0,ESI
MOVD mm1,EDI
MOVD mm2,EBX
MOV ECX,[EBP+BuffSize]
MOV ESI,[EBP+BuffPtr]
LEA EDI,[ESI+ECX-1]
CMP ECX,1
JLE .FinSwapBuff
SHR ECX,1
;ALIGN 4
.BcSwapBuff: MOV AL,[ESI]
MOV BL,[EDI]
MOV [EDI],AL
MOV [ESI],BL
DEC EDI
DEC ECX
LEA ESI,[ESI+1]
JNZ .BcSwapBuff
.FinSwapBuff:
MOVD ESI,mm0
MOVD EDI,mm1
MOVD EBX,mm2
MMX_RETURN
ALIGN 32
SECTION .data
;*** IPX data