*** spneg.s
* 	Single Precision Negation
*	for Alcyon C
*
*	float spneg(f)
*	float f;
*
*	Copyright Atari Corp. 1987,1988
*
*	MDJohnson       2/15/88
***

	.include fpmacro

; spneg(x)
	fpinit	spneg
	fpidle				; wait for idle state
	move.w	#$4418,FPCMD		; -x  -> fp0
	ckcir	#$9504			; ready for single
	move.l	4(sp),FPOP		; write first op

	fpidle				; wait for idle state
	move.w	#$6400,FPCMD		; fp0 -> single
	ckcir	#$B104			; ready for single
	move.l	FPOP,d0			; get single
	rts