;/***
;*trigal.a - asin, acos, atan functions 
;*
;*	Copyright (c) 1991-1991, Microsoft Corporation.	All rights reserved.
;*
;*Purpose:
;*   Arc trig  functions to be used with M68K version
;*
;*Revision History:
;*   05-13-92  XY   based on triga.a
;*
;*******************************************************************************/

#include <traps.a>
#ifdef SANE
#include <sane.a>
#endif

	externW _errno

;long double atanl(long double x)


cProc atanl,PUBLIC
	parmT x
	localW fpstat
	localV xlocalx,10
	localW xtestw
cBegin atanl
#ifdef SANE
	pea fpstat
	move.w #FOPROCENTRY,-(a7)
	FP68K			;save current status & set default control

	pea x
	move.w #FOATANX,-(a7)
	Elems68K		;atan x
	pea fpstat
	move.w #FOPROCEXIT,-(a7)
	FP68K			;set result status & restore control
	lea x,a1
	move.w (a1)+,d0		;load result for return
	move.l (a1)+,d1
	move.l (a1),a0

	pea fpstat
	move.w #FOPROCEXIT,-(a7)
	FP68K			;set result status & restore control

#else
      	fmove.l fpcr,d0

	fmove.x x, fp0
	ftst.x fp0              ;see if it is a valid number
	fmove.l fpsr, d1        ;get status word
	and.l #0x03007c00, d1  ;see if we get an exception
	cmp.l #0, d1
	bne domain_error_fpu

      	fmove.l #0,fpcr
      	fatan.x x,fp0
	jra to_end_fpu

domain_error_fpu:
	move.l #33, _errno
to_end_fpu:
      	fmove.l	d0,fpcr
#endif
cEnd atanl

#ifndef SANE

;long double asinl(long double x)


cProc asinl,PUBLIC
	parmT x
cBegin asinl
      	fmove.l fpcr,d0
	fmove.x x, fp0
      	fmove.l #0,fpcr
      	fasin.x x,fp0
      	fmove.l	d0,fpcr
cEnd asinl


;long double acosl(long double x)


cProc acosl,PUBLIC
	parmT x
cBegin acosl
      	fmove.l fpcr,d0
	fmove.x x, fp0
      	fmove.l #0,fpcr
      	facos.x x,fp0
      	fmove.l	d0,fpcr
cEnd acosl

#endif