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1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
6 | * @(#)vax.h 5.1 (Berkeley) %G% | |
7 | */ | |
9ae42d58 KM |
8 | |
9 | /* | |
10 | * opcode of the `calls' instruction | |
11 | */ | |
12 | #define CALLS 0xfb | |
13 | ||
14 | /* | |
15 | * offset (in bytes) of the code from the entry address of a routine. | |
16 | * (see asgnsamples for use and explanation.) | |
17 | */ | |
18 | #define OFFSET_OF_CODE 2 | |
9b8e0da9 | 19 | #define UNITS_TO_CODE (OFFSET_OF_CODE / sizeof(UNIT)) |
9ae42d58 KM |
20 | |
21 | /* | |
22 | * register for pc relative addressing | |
23 | */ | |
24 | #define PC 0xf | |
25 | ||
26 | enum opermodes { | |
27 | literal, indexed, reg, regdef, autodec, autoinc, autoincdef, | |
28 | bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef, | |
29 | immediate, absolute, byterel, bytereldef, wordrel, wordreldef, | |
30 | longrel, longreldef | |
31 | }; | |
32 | typedef enum opermodes operandenum; | |
33 | ||
34 | struct modebyte { | |
35 | unsigned int regfield:4; | |
36 | unsigned int modefield:4; | |
37 | }; | |
38 |