98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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#define RCSID1 "$Id$"
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/*
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** Zilog z8000 machine dependent C declarations
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*/
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#define REG 1
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#define IM 2
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#define IR 4
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#define DA 8
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#define X 16
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#define RA 32
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#define BA 64
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#define BX 128
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#define TYPE_11a23 IR | DA | X
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#define TYPE_11b23 REG | IR | DA | X
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#define TYPE_12 REG | IR | DA | X
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#define TYPE_1263 REG | IR | DA | X
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#define TYPE_jp IR | DA | X
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#define TYPE_21a REG | IR | DA | X
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#define TYPE_21b REG
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#define TYPE_2151 REG | IM | IR | DA | X
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#define TYPE_pop REG | IR | DA | X
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#define TYPE_push REG | IM | IR | DA | X
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#define TYPE_ldm IR | DA | X
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#define TYPE_ld IR | DA | X
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#define DST 0
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#define SRC 1
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#define DJNZ_ 0xF000
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#define JR_ 0xE000
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#define CALR_ 0xD000
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#define low3(z) ( ((short) z) & 07 )
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#define low4(z) ( ((short) z) & 017 )
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#define low5(z) ( ((short) z) & 037 )
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#define low7(z) ( ((short) z) & 0177 )
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#define low8(z) ( ((short) z) & 0377 )
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#define low11(z) ( ((short) z) & 03777 )
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#define low12(z) ( ((short) z) & 07777 )
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#define low15(z) ( ((short) z) & 077777 )
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#define fit3(z) ( low3(z) == (z) )
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#define fit4(z) ( low4(z) == (z) )
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#define fit5(z) ( low5(z) == (z) )
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#define fit7(z) ( low7(z) == (z) )
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#define fit8(z) ( low8(z) == (z) )
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#define fits8(z) ( low7(z) == (z) || low7(-z-1) == (-z-1) )
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#define fits12(z) ( low11(z) == (z) || low11(-z-1) == (-z-1) )
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#define fits16(z) ( low15(z) == (z) || low15(-z-1) == (-z-1) )
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#define bitset(x,b) ( ((int) x) & ((int) 1<<b) ) /*bit b set in x?*/
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typedef struct address ATYPE;
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struct address
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{ short seg;
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short off;
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};
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extern expr_t displ; /* never more than 16 bits */
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extern short offset; /* never more than 16 bits */
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extern short mode;
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#ifndef extern
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extern short modetbl[ 5 ];
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#else
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short modetbl[5] = { 8, 0, 0, 4, 4 };
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/* Modes for REG, IM, IR, DA, X. e.g. modetbl[ 2log REG ]
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** is the mode if operand is of type REG.
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** No entries for RA, BA and BX are needed.
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*/
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#endif
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extern short operand;
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extern short oprtype[ 2 ];
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extern expr_t addr_inf; /* .val (address) up to 23 bits! */
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extern expr_t immed;
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#define regerr() serror("register error")
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/* Z8000 specific routines */
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void settype( int type );
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int twolog(int s);
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void setmod(int opr);
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void chtype(int opr, int typerange );
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void chreg(int opc, int reg);
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ATYPE checkaddr(valu_t addr );
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void emit_ad(expr_t ad_inf);
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void ldmcode(int wrd1,int wrd2, int num);
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valu_t adjust(valu_t absval);
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void branch(int opc,expr_t exp);
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void ldrel(int opc,expr_t exp);
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void shiftcode(int w1, int w2);
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void argerr(void);
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