ops.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

#define O_BITB 0x93		/* bit test byte */
#define O_CLRB 0x94		/* clear byte */
#define O_TSTB 0x95		/* test byte */
#define O_INCB 0x96		/* increment byte */
#define O_DECB 0x97		/* decrement byte */
#define O_CVTBL 0x98		/* convert byte to long */
#define O_CVTBW 0x99		/* convert byte to word */
#define O_MOVZBL 0x9A		/* move zero-extended byte to long */
#define O_MOVZBW 0x9B		/* move zero-extended byte to word */
#define O_ROTL 0x9C		/* rotate long */
#define O_ACBB 0x9D		/* add compare and branch byte */
#define O_MOVAB 0x9E		/* move address of byte */
#define O_PUSHAB 0x9F		/* push address of byte */
#define O_ADDW2 0xA0		/* add word 2 operand */
#define O_ADDW3 0xA1		/* add word 3 operand */
#define O_SUBW2 0xA2		/* subtract word 2 operand */
#define O_SUBW3 0xA3		/* subtract word 3 operand */
#define O_MULW2 0xA4		/* multiply word 2 operand */
#define O_MULW3 0xA5		/* multiply word 3 operand */
#define O_DIVW2 0xA6		/* divide word 2 operand */
#define O_DIVW3 0xA7		/* divide word 3 operand */
#define O_BISW2 0xA8		/* bit set word 2 operand */
#define O_BISW3 0xA9		/* bit set word 3 operand */
#define O_BICW2 0xAA		/* bit clear word 2 operand */
#define O_BICW3 0xAB		/* bit clear word 3 operand */
#define O_XORW2 0xAC		/* exclusive or word 2 operand */
#define O_XORW3 0xAD		/* exclusive or word 3 operand */
#define O_MNEGW 0xAE		/* move negated word */
#define O_CASEW 0xAF		/* case word */
#define O_MOVW 0xB0		/* move word */
#define O_CMPW 0xB1		/* compare word */
#define O_MCOMW 0xB2		/* move complemented word */
#define O_BITW 0xB3		/* bit test word */
#define O_CLRW 0xB4		/* clear word */
#define O_TSTW 0xB5		/* test word */
#define O_INCW 0xB6		/* increment word */
#define O_DECW 0xB7		/* decrement word */
#define O_BISPSW 0xB8		/* bit set processor status word */
#define O_BICPSW 0xB9		/* bit clear processor status word */
#define O_POPR 0xBA		/* pop register */
#define O_PUSHR 0xBB		/* push register */
#define O_CHMK 0xBC		/* change mode to kernel */
#define O_CHME 0xBD		/* change mode to executive */
#define O_CHMS 0xBE		/* change mode to supervisor */
#define O_CHMU 0xBF		/* change mode to user */
#define O_ADDL2 0xC0		/* add long 2 operand */
#define O_ADDL3 0xC1		/* add long 3 operand */
#define O_SUBL2 0xC2		/* subtract long 2 operand */
#define O_SUBL3 0xC3		/* subtract long 3 operand */
#define O_MULL2 0xC4		/* multiply long 2 operand */
#define O_MULL3 0xC5		/* multiply long 3 operand */
#define O_DIVL2 0xC6		/* divide long 2 operand */
#define O_DIVL3 0xC7		/* divide long 3 operand */
#define O_BISL2 0xC8		/* bit set long 2 operand */
#define O_BISL3 0xC9		/* bit set long 3 operand */
#define O_BICL2 0xCA		/* bit clear long 2 operand */
#define O_BICL3 0xCB		/* bit clear long 3 operand */
#define O_XORL2 0xCC		/* exclusive or long 2 operand */
#define O_XORL3 0xCD		/* exclusive or long 3 operand */
#define O_MNEGL 0xCE		/* move negated long */
#define O_CASEL 0xCF		/* case long */
#define O_MOVL 0xD0		/* move long */
#define O_CMPL 0xD1		/* compare long */
#define O_MCOML 0xD2		/* move complemented long */
#define O_BITL 0xD3		/* bit test long */
#define O_CLRL 0xD4		/* clear long (also CLRF) */
#define O_TSTL 0xD5		/* test long */
#define O_INCL 0xD6		/* increment long */
#define O_DECL 0xD7		/* decrement long */
#define O_ADWC 0xD8		/* add with carry */
#define O_SBWC 0xD9		/* subtrace with carry */
#define O_MTPR 0xDA		/* move to processor register */
#define O_MFPR 0xDB		/* move from processor register */
#define O_MOVPSL 0xDC		/* move processor status longword */
#define O_PUSHL 0xDD		/* push long */
#define O_MOVAL 0xDE		/* move address of long (also MOVAF) */
#define O_PUSHAL 0xDF		/* push address of long (also PUSHAF) */
#define O_BBS 0xE0		/* branch on bit set */
#define O_BBC 0xE1		/* branch on bit clear */
#define O_BBSS 0xE2		/* branch on bit set and set */
#define O_BBCS 0xE3		/* branch on bit clear and set */
#define O_BBSC 0xE4		/* branch on bit set and clear */
#define O_BBCC 0xE5		/* branch on bit clear and clear */
#define O_BBSSI 0xE6		/* branch on bit set and set interlocked */
#define O_BBCCI 0xE7		/* branch on bit clear and clear interlocked */
#define O_BLBS 0xE8		/* branch on low bit set */
#define O_BLBC 0xE9		/* branch on low bit clear */
#define O_FFS 0xEA		/* find first set bit */
#define O_FFC 0xEB		/* find first clear bit */
#define O_CMPV 0xEC		/* compare field */
#define O_CMPZV 0xED		/* compare zero-extended field */
#define O_EXTV 0xEE		/* extract field */
#define O_EXTZV 0xEF		/* extract zero-extended field */
#define O_INSV 0xF0		/* insert field */
#define O_ACBL 0xF1		/* add compare and branch long */
#define O_AOBLSS 0xF2		/* add one and branch on less */
#define O_AOBLEQ 0xF3		/* add one and branch on less or equal */
#define O_SOBGEQ 0xF4		/* subtract one and branch on gtr or equal */
#define O_SOBGTR 0xF5		/* subtract one and branch on greater */
#define O_CVTLB 0xF6		/* convert long to byte */
#define O_CVTLW 0xF7		/* convert long to word */
#define O_ASHP 0xF8		/* arithmetic shift and round packed */
#define O_CVTLP 0xF9		/* convert long to packed */
#define O_CALLG 0xFA		/* call with general argument list */
#define O_CALLS 0xFB		/* call with stack */
#define O_XFC 0xFC		/* extended function call */
#define O_ESCD 0xFD		/* ESCD to DIGITAL */
#define O_ESCE 0xFE		/* ESCE to DIGITAL */
#define O_ESCF 0xFF		/* ESCF to DIGITAL */

/*
 * Opcode definitions.
 *
 * Much of this was taken from the assembler.
 */

/*
 * Argument access types.
 */

#define ACCA    0100    /* address only */
#define ACCR    010	/* read */
#define ACCW    020	/* write */
#define ACCM    030	/* modify */
#define ACCB    040	/* branch displacement */
#define ACCI    050	/* variable field */

/*
 * Argument lengths.
 */

#define TYPB    0	/* byte */
#define TYPW    01	/* word */
#define TYPL    02	/* long */
#define TYPQ    03	/* quad */
#define TYPF    04	/* floating */
#define TYPD    05	/* double floating */

/*
 * Addressing modes.
 */

#define LITSHORT    0x0	/* short literals */
#define LITUPTO31   0x1
#define LITUPTO47   0x2
#define LITUPTO63   0x3
#define INDEX       0x4 /* i[r] */
#define REG	    0x5 /* r */
#define REGDEF      0x6 /* (r) */
#define AUTODEC     0x7 /* -(r) */
#define AUTOINC     0x8 /* (r)+ */
#define AUTOINCDEF  0x9 /* *(r)+ */
#define BYTEDISP    0xA /* BD(r) */
#define BYTEDISPDEF 0xB /* *BD(r) */
#define WORDDISP    0xC /* WD(r) */
#define WORDDISPDEF 0xD /* *WD(r) */
#define LONGDISP    0xE /* LD(r) */
#define LONGDISPDEF 0xF /* *LD(r) */

#define is_branch_disp(arg) ((arg & ACCB) != 0)
#define typelen(arg)        (arg & 07)
#define regnm(mode)	    (mode & 0xF)
#define addrmode(mode)      (mode >> 4)

/*
 * Operator information structure.
 */

typedef struct {
    char *iname;
    char val;
    char numargs;
    char argtype[6];
} Optab;

Optab optab[500] ;
String regname[100] ;
String fltimm[100] ;
#endif