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Assembly Source File  |  1992-06-10  |  2.0 KB  |  65 lines
  1. ;[]-----------------------------------------------------------------[]
  2. ;|      H_SPUSH.ASM -- struct argument routine                       |
  3. ;[]-----------------------------------------------------------------[]
  4.  
  5. ;
  6. ;       C/C++ Run Time Library - Version 5.0
  7. ; 
  8. ;       Copyright (c) 1987, 1992 by Borland International
  9. ;       All Rights Reserved.
  10. ; 
  11.  
  12.                 INCLUDE RULES.ASI
  13.  
  14. ; calls to this routine are generated by the compiler to copy
  15. ; a "struct" argument to the stack
  16. ;
  17. ; DX:AX = address of struct to copy to stack
  18. ; CX    = size of struct, in bytes
  19. ;
  20.  
  21. _TEXT           SEGMENT BYTE PUBLIC 'CODE'
  22.                 ASSUME  CS:_TEXT
  23.  
  24.                 PUBLIC  SPUSH@
  25.                 PUBLIC  F_SPUSH@
  26.                 PUBLIC  N_SPUSH@
  27.  
  28. N_SPUSH@:
  29.                 pop     bx              ;fetch return address off stack
  30.                 sub     sp,cx           ;make room on stack for struct
  31.                 push    cs              ;save return address back on stack
  32.                 jmp     short PUSHIT
  33. SPUSH@:
  34. F_SPUSH@:
  35.                 pop     bx              ;fetch return address off stack
  36.                 pop     es
  37.                 sub     sp,cx           ;make room on stack for struct
  38.                 push    es              ;save return address back on stack
  39. PUSHIT:
  40.                 push    bx
  41.  
  42.                 push    di              ;save regs
  43.                 push    ds
  44.  
  45.                 mov     di,sp           ;set up di for move
  46.                 add     di,8
  47.                 mov     bx,ss           ;es = ss for move
  48.                 mov     es,bx
  49.                 mov     ds,dx           ;set up ds for move
  50.                 xchg    ax,si           ;set up si for move (also saves si)
  51.  
  52.                 cld
  53.                 shr     cx,1
  54.                 rep     movsw
  55.                 adc     cx,cx
  56.                 rep     movsb
  57.  
  58.                 xchg    si,ax           ;restore si
  59.                 pop     ds
  60.                 pop     di
  61.                 retf
  62. _TEXT           ENDS
  63.                 END
  64.  
  65.