; File:   fpu.i
; Author: Mikael Kalms <mikael@kalms.org>
; Date:   1 Oct 1999
; Title:  FPU control/status register bits
;
; Description:
;   Contains bitmasks for FPU control/status register bits


		IFND	_FPU_I_
_FPU_I_		SET	1

; Rounding modes

FPCR_ROUNDMASK	EQU	$00000030
FPCR_RN		EQU	$00000000	; Round toward Nearest (default)
FPCR_RZ		EQU	$00000010	; Round toward Zero (CHOP)
FPCR_RM		EQU	$00000020	; Round toward -Infinity (FLOOR)
FPCR_RP		EQU	$00000030	; Round toward +Infinity (CEILING)

; Precision modes

FPCR_PRECMASK	EQU	$000000c0
FPCR_EXT	EQU	$00000000	; Extended (80bit) precision (default)
FPCR_SINGLE	EQU	$00000040	; Single (32bit) precision
FPCR_DOUBLE	EQU	$00000080	; Double (64bit) precision

; Exception enable

FPCR_ENABLEMASK	EQU	$0000ff00
FPCRF_INEX1	EQU	$00000100
FPCRF_INEX2	EQU	$00000200
FPCRF_DZ	EQU	$00000400
FPCRF_UNFL	EQU	$00000800
FPCRF_OVFL	EQU	$00001000
FPCRF_OPERR	EQU	$00002000
FPCRF_SNAN	EQU	$00004000
FPCRF_BSUN	EQU	$00008000

FPCRB_INEX1	EQU	8
FPCRB_INEX2	EQU	9
FPCRB_DZ	EQU	10
FPCRB_UNFL	EQU	11
FPCRB_OVFL	EQU	12
FPCRB_OPERR	EQU	13
FPCRB_SNAN	EQU	14
FPCRB_BSUN	EQU	15


; Accrued exceptions

FPSR_AEXCMASK	EQU	$000000f8
FPSRF_AINEX	EQU	$00000008
FPSRF_ADZ	EQU	$00000010
FPSRF_AUNFL	EQU	$00000020
FPSRF_AOVFL	EQU	$00000040
FPSRF_AIOP	EQU	$00000080

FPSRB_AINEX	EQU	3
FPSRB_ADZ	EQU	4
FPSRB_AUNFL	EQU	5
FPSRB_AOVFL	EQU	6
FPSRB_AIOP	EQU	7

; Exception status

FPSR_EXCMASK	EQU	$0000ff00
FPSRF_INEX1	EQU	$00000100
FPSRF_INEX2	EQU	$00000200
FPSRF_DZ	EQU	$00000400
FPSRF_UNFL	EQU	$00000800
FPSRF_OVFL	EQU	$00001000
FPSRF_OPERR	EQU	$00002000
FPSRF_SNAN	EQU	$00004000
FPSRF_BSUN	EQU	$00008000

FPSRB_INEX1	EQU	8
FPSRB_INEX2	EQU	9
FPSRB_DZ	EQU	10
FPSRB_UNFL	EQU	11
FPSRB_OVFL	EQU	12
FPSRB_OPERR	EQU	13
FPSRB_SNAN	EQU	14
FPSRB_BSUN	EQU	15

; Quotient byte

FPSR_QUOTMASK	EQU	$00ff0000
FPSR_QUOTSHIFT	EQU	16

; Status flags

FPSRB_NAN	EQU	24
FPSRB_I		EQU	25
FPSRB_Z		EQU	26
FPSRB_N		EQU	27

FPSRF_NAN	EQU	$01000000
FPSRF_I		EQU	$02000000
FPSRF_Z		EQU	$04000000
FPSRF_N		EQU	$08000000

		ENDC