1 /* 2 * Copyright (c) 1980 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 * @(#)operand.h 5.1 (Berkeley) 06/07/85 7 * 8 * operand.h -- definitions useful to VAX operand decoding 9 */ 10 11 #define opmode(op) (op & 0xf0) 12 #define opregn(op) (op & 0xf) 13 14 /* 15 * operand modes 16 */ 17 #define LITERAL0 0x00 18 #define LITERAL1 0x10 19 #define LITERAL2 0x20 20 #define LITERAL3 0x30 21 #define INDEXED 0x40 22 #define REGISTER 0x50 23 #define REGDEFERED 0x60 24 #define AUTODEC 0x70 25 #define AUTOINC 0x80 26 #define AUTOINCDEF 0x90 27 #define BYTEDISP 0xa0 28 #define BYTEDISPDEF 0xb0 29 #define WORDDISP 0xc0 30 #define WORDDISPDEF 0xd0 31 #define LONGDISP 0xe0 32 #define LONGDISPDEF 0xf0 33 /* 34 * Modes where R is PC 35 */ 36 #define IMMEDIATE 0x8f 37 #define ABSOLUTE 0x9f 38 #define BYTEREL 0xaf 39 #define BYTERELDEF 0xbf 40 #define WORDREL 0xcf 41 #define WORDRELDEF 0xdf 42 #define LONGREL 0xef 43 #define LONGRELDEF 0xff 44 45 /* 46 * register definitions 47 */ 48 #define R0 0 49 #define R1 1 50 #define R2 2 51 #define R3 3 52 #define R4 4 53 #define R5 5 54 #define R6 6 55 #define R7 7 56 #define R8 8 57 #define R9 9 58 #define R10 10 59 #define R11 11 60 #define AP 12 61 #define FP 13 62 #define SP 14 63 #define PC 15 64