?? memcpy.asm
字號:
;********************************************************************
;
; (c) Freescale Semiconductor
; 2004 All Rights Reserved
;
;
;********************************************************************
;
; File Name: memcpy.asm
;
; Description: Contains code for copying X memory to X memory.
;
; Modules
; Included: FmemMemcpy
;
;********************************************************************
SECTION rtlib
include "portasm.h"
GLOBAL FmemMemcpy
;********************************************************************
;
; void *memcpy( void *dest, const void *src, size_t count );
; #pragma interrupt /* Can be called from a pragma interrupt ISR */
;
; Register usage:
; R2 - dest
; R3 - src
; Y0 - count/temp
;
;********************************************************************
ORG P:
FmemMemcpy:
tst.w Y0
beq EndDo
nop
nop
if CODEWARRIOR_WORKAROUND==1
do Y0,>>EndDo
else
do Y0,EndDo
endif
move.bp X:(R3)+,Y0
move.bp Y0,X:(R2)+
EndDo:
; R2 - Contains *dest return value
rts
ENDSEC
END
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