usr/src/pgrm/as.tahoe/instrs.h

/*
 *      Copyright (c) 1982 Regents of the University of California
 *      @(#)instrs.h 4.5 6/9/83
 */
/*
 *      Argument data types
 *
 *      If you change these definitions, you must also change the tables
 *      in assizetab.c
 */
#define TYPB            000     /* byte integer */
#define TYPW            001     /* word integer */
#define TYPL            002     /* long integer */
#define TYPQ            003     /* quad integer */
#define TYPF            004     /* F float */
#define TYPD            005     /* D float */
#define TYPNONE         006     /* when nothing */
#define TYPLG           3       /* number of bits the above take up */

#define TYPMASK ((1<<TYPLG)-1)  /* the mask (assumes 2's comp arith) */
/*
 *      Constructors and extractors for argument access kinds and types
 */
#define A_CONS(access, type)    ((access) | (type))
#define A_ACCEXT(consed)        ((consed) & (TYPMASK << TYPLG))
#define A_TYPEXT(consed)        ((consed) & TYPMASK)

/*
 * Argument access types used to test validity of operands to operators
 */
#define ACCR    (1<<TYPLG)                      /* read */
#define ACCW    (2<<TYPLG)                      /* write */
#define ACCB    (4<<TYPLG)                      /* branch displacement */
#define ACCA    (8<<TYPLG)                      /* address only */
#define ACCM    (ACCR | ACCW)                   /* modify */
#define ACCI    (ACCB | ACCR)                   /* XFC code */

#define ACCESSMASK      (ACCA | ACCR | ACCW | ACCB)     /* the mask */

/*
 *      Construction of TYPX and ACCX, to make the instrs table
 *      easy to use and read.
 */
/*
 *      For real memory address
 */
#define A_AB    A_CONS(ACCA, TYPB)
#define A_AW    A_CONS(ACCA, TYPW)
#define A_AL    A_CONS(ACCA, TYPL)
#define A_AQ    A_CONS(ACCA, TYPQ)
#define A_AF    A_CONS(ACCA, TYPF)
#define A_AD    A_CONS(ACCA, TYPD)
/*
 *      For branch displacement
 */
#define A_BB    A_CONS(ACCB, TYPB)
#define A_BW    A_CONS(ACCB, TYPW)
/*
 *      For modification
 */
#define A_MB    A_CONS(ACCM, TYPB)
#define A_MW    A_CONS(ACCM, TYPW)
#define A_ML    A_CONS(ACCM, TYPL)
#define A_MF    A_CONS(ACCM, TYPF)
#define A_MD    A_CONS(ACCM, TYPD)
/*
 *      For reading
 */
#define A_RB    A_CONS(ACCR, TYPB)
#define A_RW    A_CONS(ACCR, TYPW)
#define A_RL    A_CONS(ACCR, TYPL)
#define A_RQ    A_CONS(ACCR, TYPQ)
#define A_RF    A_CONS(ACCR, TYPF)
#define A_RD    A_CONS(ACCR, TYPD)
/*
 *      For writing
 */
#define A_WB    A_CONS(ACCW, TYPB)
#define A_WW    A_CONS(ACCW, TYPW)
#define A_WL    A_CONS(ACCW, TYPL)
#define A_WQ    A_CONS(ACCW, TYPQ)
#define A_WF    A_CONS(ACCW, TYPF)
#define A_WD    A_CONS(ACCW, TYPD)

#ifndef INSTTAB
/*
 *      Define what the entries in the table look like.
 *      This is only used for adb and sdb; not for as.
 */
#define INSTTAB
struct insttab{
        char    *iname;
        u_char  opcode;
        char    nargs;
        u_char  argtype[6];
} insttab[];

#define OP(name,opcode,nargs,a1,a2,a3,a4,a5,a6) {name,opcode,nargs,a1,a2,a3,a4,a5,a6}

#endif INSTTAB