;
;	File:		HWElemsEqus.a
;
;	Contains:	Equates for HW SANE routines
;
;	Written by:	Apple Numerics Group, DSG
;
;	Copyright:	© 1985-1992 by Apple Computer, Inc., all rights reserved.
;
;	Change History (most recent first):
;
;		<SM2>	 2/3/93		CSS		Update from Horror:
;		<H2>	 9/29/92	BG		Adding Jon Okada's latest fixes.
;		 <1>	10/24/91	SAM/KSM	Rolled in Regatta file.
;		
;	Regatta Change History:
;
;		 <2>	 5/28/91	SAM		Merged from TERROR sources. [<2> Added the constants IsItFinan &
;									flag96bit]
;		 <1>	 5/15/91	SAM		Split off from TERROR Proj.
;
;	Terror Change History:
;
;		 <1>	01/06/91	BG		Added to TERROR/BBS for the time.
;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; File: 881ELEMSequs.a
;; Implementation of PACK5 for OmegaSANE.  Expects 881
;; Copyright Apple Computer, Inc. 1985-7, 1989, 1990, 1992, 1993.
;; All Rights Reserved
;; Confidential and Proprietary to Apple Computer,Inc.
;;
;; Written by Clayton Lewis, begun 20 March 89.
;; Based on Elems881, package code for Mac by Jerome Coonen,
;; as modified for MacII by Stuart McDonald.
;;
;; Modification history:
;;    20 Mar 89	First paltry efforts
;;     6 Jun 89	ali: added more constants & NaNs for logorithms
;;    05 Apr 91	added the constant IsItFinan & flag96bit
;;	  31 Mar 92 JPO	 Deleted 881 constant ROM selector values
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

DebugON			EQU			0	; 1 = install debug stops in code, 0 = production code

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Exception bits for exceptions to be set at exit time (high word)
;;   and for exceptions to be cleared at exit time (low word)
;; Exceptions themselves by bit number
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
SetInexact		EQU			$00080000
SetDivByZ		EQU			$00100000
SetUFlow		EQU			$00200000
SetOFlow		EQU			$00400000
SetInvalid		EQU			$00800000

ClrInexact		EQU			$0008
ClrUflow		EQU			$0020
ClrOflow		EQU			$0040

Uflow			EQU			$0020
Oflow			EQU			$0040
invalid			EQU			$80							; invalid bit  pattern
divbyzero		EQU			$10							; divide by zero bit pattern

Inexact			EQU			3							; accrued inexact bit number
ExcMask			EQU			$0F000000					; to get flag bits from FPSR
ShiftIt			EQU			5							; number of fpsr bits to shift
UnderFlow		EQU			5							; accrued underflow bit number
IsItFinan		EQU			14							; is opcode a financial function 	<2>
flag96bit		EQU			7							; the 96 bit flag in the opword 	<2>

NegInf			EQU			"$FFFF00000000000000000000" ; bit pattern for -∞
NaNLog			EQU			"$7FFF00004024000000000000" ; bit pattern for NaNLog
NaNTrig			EQU			"$7FFF00004021000000000000" ; bit pattern for NaNTrig

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Stack frame offsets, register usage
;;   Control also saves FPSR and FPCR in correct order for ProcExit
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

FPRegs			FREG		FP2/FP3			; 6 longs (record changes in control)
Regs			REG			D0/D1/A0/A4		; 4 longs (record changes in control)

SavedRegs		EQU			48				; including status and control
											;    (record changes in control)

Addr3			EQU			14+SavedRegs	; source2
Addr2			EQU			10+SavedRegs	; source
Addr1			EQU			6+SavedRegs		; destination
Opcode			EQU			4+SavedRegs		; opcode word
RetAddr			EQU			SavedRegs		; return address

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; The opcode is defined as:  [XY00 0000 NNNN NNN0]
;;    X=1 for 2 & 3 address functions, Y=1 for 3 address functions
;;    The six low order bits are the jump table index for the instruction
;;    Bit 7 is set <=> all extended data is in 96- bit format
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
OPMASK			EQU			$003E			; mask for jump table index
THREEARG		EQU			$C0				; high byte of opword for annuity, compound

SMALLEXP		EQU			255
NANPOWER		EQU			37
NANFINAN		EQU			38

PLUSINFSGL		EQU			$7F800000
MINUSINFSGL		EQU			$FF800000
MINUSONESGL		EQU			$BF800000
PLUSONESGL		EQU			$3F800000
MINUSZEROSGL	EQU			$80000000
BIGSINGLE		EQU			$7F7FFFFF		; 2^128 - ulp
RANDMODULUS		EQU			$7FFFFFFF		; 2^31-1

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Bit indices into STATUS
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
XBit			EQU			3
DBit			EQU			4
UBit			EQU			5
OBit			EQU			6
IBit			EQU			7
NaNBit			EQU			24
InfBit			EQU			25
ZeroBit			EQU			26
NegBit			EQU			27


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Values in 881 constant ROM - DELETED <3/31/92, JPO>
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;Ln2				EQU			$30			; offset of Ln(2) in the 68881 ROM
;CONSTONE		EQU			$32
;CONSTZERO		EQU			$0F