| 1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that: (1) source distributions retain this entire copyright |
| 7 | * notice and comment, and (2) distributions including binaries display |
| 8 | * the following acknowledgement: ``This product includes software |
| 9 | * developed by the University of California, Berkeley and its contributors'' |
| 10 | * in the documentation or other materials provided with the distribution |
| 11 | * and in all advertising materials mentioning features or use of this |
| 12 | * software. Neither the name of the University nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 18 | * |
| 19 | * @(#)vax.h 5.4 (Berkeley) 6/1/90 |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * opcode of the `calls' instruction |
| 24 | */ |
| 25 | #define CALLS 0xfb |
| 26 | |
| 27 | /* |
| 28 | * offset (in bytes) of the code from the entry address of a routine. |
| 29 | * (see asgnsamples for use and explanation.) |
| 30 | */ |
| 31 | #define OFFSET_TO_CODE 2 |
| 32 | #define UNITS_TO_CODE (OFFSET_TO_CODE / sizeof(UNIT)) |
| 33 | |
| 34 | /* |
| 35 | * register for pc relative addressing |
| 36 | */ |
| 37 | #define PC 0xf |
| 38 | |
| 39 | enum opermodes |
| 40 | { |
| 41 | literal, indexed, reg, regdef, autodec, autoinc, autoincdef, |
| 42 | bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef, |
| 43 | immediate, absolute, byterel, bytereldef, wordrel, wordreldef, |
| 44 | longrel, longreldef |
| 45 | }; |
| 46 | typedef enum opermodes operandenum; |
| 47 | |
| 48 | struct modebyte |
| 49 | { |
| 50 | unsigned int regfield:4; |
| 51 | unsigned int modefield:4; |
| 52 | }; |