ops.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*#@(#)ops.c	4.1	Ultrix	7/17/90*/
/* Copyright (c) 1982 Regents of the University of California */

static char sccsid[] = "@(#)ops.c 1.3 12/18/82";

static char rcsid[] = "$Header: ops.c,v 1.3 84/03/27 10:22:43 linton Exp $";

/*
 * Machine operators.
 */

#include "defs.h"
#include "ops.h"

#ifndef public
typedef unsigned char VaxOpcode;

#define O_HALT 0x00		/* halt */
#define O_NOP 0x01		/* no operation */
#define O_REI 0x02		/* return from exception or interrupt */
#define O_BPT 0x03		/* break point fault */
#define O_RET 0x04		/* return from called procedure */
#define O_RSB 0x05		/* return from subroutine */
#define O_LDPCTX 0x06		/* load process context */
#define O_SVPCTX 0x07		/* save process context */
#define O_CVTPS 0x08		/* convert packed to leading separate numeric */
#define O_CVTSP 0x09		/* convert leading separate numeric to packed */
#define O_INDEX 0x0A		/* compute index */
#define O_CRC 0x0B		/* calculate cyclic redundancy check */
#define O_PROBER 0x0C		/* probe read access */
#define O_PROBEW 0x0D		/* probe write access */
#define O_INSQUE 0x0E		/* insert into queue */
#define O_REMQUE 0x0F		/* remove from queue */
#define O_BSBB 0x10		/* branch to subroutine with byte disp */
#define O_BRB 0x11		/* branch with byte disp */
#define O_BNEQ 0x12		/* branch on not equal (also BNEQU) */
#define O_BEQL 0x13		/* branch on equal (also BEQLU */
#define O_BGTR 0x14		/* branch on greater */
#define O_BLEQ 0x15		/* branch on less or equal */
#define O_JSB 0x16		/* jump to subroutine */
#define O_JMP 0x17		/* jump */
#define O_BGEQ 0x18		/* branch on greater or equal */
#define O_BLSS 0x19		/* branch on less */
#define O_BGTRU 0x1A		/* branch on greater unsigned */
#define O_BLEQU 0x1B		/* branch on less of equal unsigned */
#define O_BVC 0x1C		/* branch on overflow clear */
#define O_BVS 0x1D		/* branch on overflow set */
#define O_BCC 0x1E		/* branch on carry clear (also BGEQU) */
#define O_BCS 0x1F		/* branch on carry set (also BLSSU) */
#define O_ADDP4 0x20		/* add packed 4 operand */
#define O_ADDP6 0x21		/* add packed 6 operand */
#define O_SUBP4 0x22		/* subtract packed 4 operand */
#define O_SUBP6 0x23		/* subtract packed 6 operand */
#define O_CVTPT 0x24		/* convert packed to trailing numeric */
#define O_MULP 0x25		/* multiply packed */
#define O_CVTTP 0x26		/* convert trailing numeric to packed */
#define O_DIVP 0x27		/* divide packed */
#define O_MOVC3 0x28		/* move character 3 operand */
#define O_CMPC3 0x29		/* compare character 3 operand */
#define O_SCANC 0x2A		/* scan for character */
#define O_SPANC 0x2B		/* span characters */
#define O_MOVC5 0x2C		/* move character 5 operand */
#define O_CMPC5 0x2D		/* compare character 5 operand */
#define O_MOVTC 0x2E		/* move translated characters */
#define O_MOVTUC 0x2F		/* move translated until character */
#define O_BSBW 0x30		/* branch to subroutine with word disp */
#define O_BRW 0x31		/* branch with word disp */
#define O_CVTWL 0x32		/* convert word to long */
#define O_CVTWB 0x33		/* convert word to byte */
#define O_MOVP 0x34		/* move packed */
#define O_CMPP3 0x35		/* compare packed 3 operand */
#define O_CVTPL 0x36		/* convert packed to long */
#define O_CMPP4 0x37		/* compare packed 4 operand */
#define O_EDITPC 0x38		/* edit packed to character */
#define O_MATCHC 0x39		/* match characters */
#define O_LOCC 0x3A		/* locate characters */
#define O_SKPC 0x3B		/* skip character */
#define O_MOVZWL 0x3C		/* move zero-extended word to long */
#define O_ACBW 0x3D		/* add compare and branch word */
#define O_MOVAW 0x3E		/* move address of word */
#define O_PUSHAW 0x3F		/* push address of word */
#define O_ADDF2 0x40		/* add floating 2 operand */
#define O_ADDF3 0x41		/* add floating 3 operand */
#define O_SUBF2 0x42		/* subtract floating 2 operand */
#define O_SUBF3 0x43		/* subtract floating 3 operand */
#define O_MULF2 0x44		/* multiply floating 2 operand */
#define O_MULF3 0x45		/* multiply floating 3 operand */
#define O_DIVF2 0x46		/* divide floating 2 operand */
#define O_DIVF3 0x47		/* divide floating 3 operand */
#define O_CVTFB 0x48		/* convert float to byte */
#define O_CVTFW 0x49		/* convert float to word */
#define O_CVTFL 0x4A		/* convert float to long */
#define O_CVTRFL 0x4B		/* convert rounded float to long */
#define O_CVTBF 0x4C		/* convert byte to float */
#define O_CVTWF 0x4D		/* convert word to float */
#define O_CVTLF 0x4E		/* convert long to float */
#define O_ACBF 0x4F		/* add compare and branch floating */
#define O_MOVF 0x50		/* move float */
#define O_CMPF 0x51		/* compare floating */
#define O_MNEGF 0x52		/* move negated floating */
#define O_TSTF 0x53		/* test float */
#define O_EMODF 0x54		/* extended modulus floating */
#define O_POLYF 0x55		/* evaluate polynomial floating */
#define O_CVTFD 0x56		/* convert float to double */
#define O_DUMMY57 0x57		/* RESERVED to DIGITAL */
#define O_ADAWI 0x58		/* add aligned word interlocked */
#define O_DUMMY59 0x59		/* RESERVED to DIGITAL */
#define O_DUMMY5a 0x5A		/* RESERVED to DIGITAL */
#define O_DUMMY5b 0x5B		/* RESERVED to DIGITAL */
#define O_INSQHI 0x5C		/* insert into queue head, interlocked */
#define O_INSQTI 0x5D		/* insert into queue tail, interlocked */
#define O_REMQHI 0x5E		/* remove from queue head, interlocked */
#define O_REMQTI 0x5F		/* remove from queue tail, interlocked */
#define O_ADDD2 0x60		/* add double 2 operand */
#define O_ADDD3 0x61		/* add double 3 operand */
#define O_SUBD2 0x62		/* subtract double 2 operand */
#define O_SUBD3 0x63		/* subtrace double 3 operand */
#define O_MULD2 0x64		/* multiply double 2 operand */
#define O_MULD3 0x65		/* multiply double 3 operand */
#define O_DIVD2 0x66		/* divide double 2 operand */
#define O_DIVD3 0x67		/* divide double 3 operand */
#define O_CVTDB 0x68		/* convert double to byte */
#define O_CVTDW 0x69		/* convert double to word */
#define O_CVTDL 0x6A		/* convert double to long */
#define O_CVTRDL 0x6B		/* convert rounded double to long */
#define O_CVTBD 0x6C		/* convert byte to double */
#define O_CVTWD 0x6D		/* convert word to double */
#define O_CVTLD 0x6E		/* convert long to double */
#define O_ACBD 0x6F		/* add compare and branch double */
#define O_MOVD 0x70		/* move double */
#define O_CMPD 0x71		/* compare double */
#define O_MNEGD 0x72		/* move negated double */
#define O_TSTD 0x73		/* test double */
#define O_EMODD 0x74		/* extended modulus double */
#define O_POLYD 0x75		/* evaluate polynomial double */
#define O_CVTDF 0x76		/* convert double to float */
#define O_DUMMY77 0x77		/* RESERVED to DIGITAL */
#define O_ASHL 0x78		/* arithmetic shift long */
#define O_ASHQ 0x79		/* arithmetic shift quad */
#define O_EMUL 0x7A		/* extended multiply */
#define O_EDIV 0x7B		/* extended divide */
#define O_CLRQ 0x7C		/* clear quad (also CLRD) */
#define O_MOVQ 0x7D		/* move quad */
#define O_MOVAQ 0x7E		/* move address of quad (also MOVAD) */
#define O_PUSHAQ 0x7F		/* push address of quad (also PUSHAD) */
#define O_ADDB2 0x80		/* add byte 2 operand */
#define O_ADDB3 0x81		/* add byte 3 operand */
#define O_SUBB2 0x82		/* subtract byte 2 operand */
#define O_SUBB3 0x83		/* subtract byte 3 operand */
#define O_MULB2 0x84		/* multiply byte 2 operand */
#define O_MULB3 0x85		/* multiply byte 3 operand */
#define O_DIVB2 0x86		/* divide byte 2 operand */
#define O_DIVB3 0x87		/* divide byte 3 operand */
#define O_BISB2 0x88		/* bit set byte 2 operand */
#define O_BISB3 0x89		/* bit set byte 3 operand */
#define O_BICB2 0x8A		/* bit clear byte 2 operand */
#define O_BICB3 0x8B		/* bit clear byte 3 operand */
#define O_XORB2 0x8C		/* exclusive or byte 2 operand */
#define O_XORB3 0x8D		/* exclusive or byte 3 operand */
#define O_MNEGB 0x8E		/* move negated byte */
#define O_CASEB 0x8F		/* case byte */
#define O_MOVB 0x90		/* move byte */
#define O_CMPB 0x91		/* compare byte */
#define O_MCOMB 0x92		/* move complemented byte */
#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 */