Category : C++ Source Code
Archive   : VCCRT2.ZIP
Filename : MODEL.H

/***
*model.h - defined model declarations for use by .asm files
*
* Copyright (c) 1987-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file has model declarations for use by .asm files.
*
****/

/* Small Model Definitions */

#ifdef M_I86SM
#define DAT_ADDR_SZ 2 /* 2 byte data addr */
#define TXT_ADDR_SZ 2 /* 2 byte text addr */
#define TXT_SEG_ADDR(txtaddr) ERROR /* segment part of text addr */
#define DAT_SEG_ADDR(dataddr) ERROR /* segment part of data addr */
#define CALL call /* short call */
#define RET ret /* short return */
#define JMP jmp /* short jump */
#endif M_I86SM


/* Middle Model Definitions */

#ifdef M_I86MM
#define DAT_ADDR_SZ 2 /* 2 byte data addr */
#define TXT_ADDR_SZ 4 /* 4 byte text addr */
#define TXT_SEG_ADDR(txtaddr) 2+txtaddr /* segment part of text addr */
#define DAT_SEG_ADDR(dataddr) ERROR /* segment part of data addr */
#define CALL calli /* long call */
#define RET iret /* long return */
#define JMP jmpi /* long jump */
#define PROCDIST far /* far procs */
#endif M_I86MM

/* Compact Model Definitions */

#ifdef M_I86CM
#define DAT_ADDR_SZ 4 /* 4 byte data addr */
#define TXT_ADDR_SZ 2 /* 2 byte text addr */
#define TXT_SEG_ADDR(txtaddr) ERROR /* segment part of text addr */
#define DAT_SEG_ADDR(dataddr) 2+dataddr /* segment part of data addr */
#define CALL call /* near call */
#define RET ret /* near return */
#define JMP jmp /* near jump */
#endif M_I86CM


/* Long Model Definitions */

#ifdef M_I86LM
#define DAT_ADDR_SZ 4 /* 4 byte data addr */
#define TXT_ADDR_SZ 4 /* 4 byte text addr */
#define TXT_SEG_ADDR(txtaddr) 2+txtaddr /* segment part of text addr */
#define DAT_SEG_ADDR(dataddr) 2+dataddr /* segment part of data addr */
#define CALL calli /* long call */
#define RET reti /* long return */
#define JMP jmpi /* long jump */
#define PROCDIST far /* far procs */
#endif M_I86LM


/* Big/Little Endian Definitions for longs */

#ifdef M_I86LE /* Little Endian (low word at low addr) */
#define LOWORD(dataddr) 0+dataddr /* addr of low order word of long */
#define HIWORD(dataddr) 2+dataddr /* addr of hi order word of long */
#endif M_I86LE

#ifdef M_I86BE /* Big Endian (hi word at low addr) */
#define LOWORD(dataddr) 2+dataddr /* addr of low order word of long */
#define HIWORD(dataddr) 0+dataddr /* addr of hi order word of long */
#endif M_I86BE


/* All Model Definitions */

#define BPARGBAS TXT_ADDR_SZ+2 /* offset of first arg from bp */
#define BXARGBAS TXT_ADDR_SZ /* offset of first arg from bx */

#define TXT_OFF_ADDR(txtaddr) 0+txtaddr
#define DAT_OFF_ADDR(dataddr) 0+dataddr