usr/src/usr.bin/f77/libF77/operand.h

/*
 * operand.h  --  definitions useful to VAX operand decoding
 *      @(#)operand.h   1.1
 */

#define opmode(op)      (op & 0xf0)
#define opregn(op)      (op & 0xf)

/*
 * operand modes
 */
#define LITERAL0        0x00
#define LITERAL1        0x10
#define LITERAL2        0x20
#define LITERAL3        0x30
#define INDEXED         0x40
#define REGISTER        0x50
#define REGDEFERED      0x60
#define AUTODEC         0x70
#define AUTOINC         0x80
#define AUTOINCDEF      0x90
#define BYTEDISP        0xa0
#define BYTEDISPDEF     0xb0
#define WORDDISP        0xc0
#define WORDDISPDEF     0xd0
#define LONGDISP        0xe0
#define LONGDISPDEF     0xf0
/*
 * Modes where R is PC
 */
#define IMMEDIATE       0x8f
#define ABSOLUTE        0x9f
#define BYTEREL         0xaf
#define BYTERELDEF      0xbf
#define WORDREL         0xcf
#define WORDRELDEF      0xdf
#define LONGREL         0xef
#define LONGRELDEF      0xff

/*
 * register definitions
 */
#define R0      0
#define R1      1
#define R2      2
#define R3      3
#define R4      4
#define R5      5
#define R6      6
#define R7      7
#define R8      8
#define R9      9
#define R10     10
#define R11     11
#define AP      12
#define FP      13
#define SP      14
#define PC      15