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Length: 2677 (0xa75)
Types: TextFile
Notes: UNIX file
Names: »weitek.h«
└─⟦a6ab2eb36⟧ Bits:30004042/kconfig3.imd SW95705I 386/ix Multi-user Release 1.2
└─⟦a6ab2eb36⟧ UNIX Filesystem
└─⟦this⟧ »kc/new/usr/include/sys/weitek.h«
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#ident "@(#)weitek.h 1.5 - 87/03/24"
/*
* Weitek floating point processor definitions
*/
#define WEITEK_VADDR 0xFFC00000
#define WEITEK_ADDRS 0xFFFF0000
#define WEITEK_SIZE 0x00010000
#define WEITEK_MAXADDR (WEITEK_VADDR + WEITEK_SIZE - 1)
/*
* masks for accumulated exception byte
*/
#define WFPDE 0x00000080 /* data chain exception */
#define WFPUOE 0x00000040 /* unimplemented opcode */
#define WFPPE 0x00000020 /* precision */
#define WFPUE 0x00000010 /* underflow */
#define WFPOE 0x00000008 /* overflow */
#define WFPZE 0x00000004 /* zero divide */
#define WFPEE 0x00000002 /* enabled exception */
#define WFPIE 0x00000001 /* invalid operation */
/*
* Define all of the execption bits and the number of bits to left-shift
* to turn exception bits into exception mask bits.
*/
#define WFPAE 0x000000FD
#define WFPAEEM_SHFT 16
/*
* masks for process context register exception mask byte
*/
#define WFPDM 0x00800000 /* data chain exception */
#define WFPUOM 0x00400000 /* unimplemented opcode */
#define WFPPM 0x00200000 /* precision */
#define WFPUM 0x00100000 /* underflow */
#define WFPOM 0x00080000 /* overflow */
#define WFPZM 0x00040000 /* zero divide */
#define WFPIM 0x00010000 /* invalid operation */
#define WFPB17 0x00020000 /* bit 17 always set */
/*
* rounding modes for process context register
*/
#define WFPRN 0x00000000 /* round to nearest value */
#define WFPRZ 0x04000000 /* round toward zero */
#define WFPRP 0x08000000 /* round toward positive infinity */
#define WFPRM 0x0C000000 /* round toward negative infinity */
#define WFPRIS 0x00000000 /* round to integer based on RND */
#define WFPRIZ 0x02000000 /* round integer to zero always */
#define WFPB24 0x01000000 /* bit 24 always set */
extern char weitek_kind;
#define WEITEK_NO 0 /* no chip support */
#define WEITEK_HW 1 /* chip present */
#define WEITEK_SW 2 /* emulator present */
extern struct proc *weitek_proc;
extern unsigned long weitek_paddr;
extern void save_weitek();
extern void restore_weitek();
extern int weitek_debug;
/* Definitions for the Weitek emulator */
#define PCR_INTR 0x00000002l
struct ctxt_type {
long REGISTERS[32]; /* The 1167 register file */
long PCR; /* The current PCR register */
};
/* Short hand defines to access the registers and pcr from the structure */
#define registers ctxt -> REGISTERS
#define pcr ctxt -> PCR