*** pow.s
* 	Double Precision Power Function
*	for Alcyon C
*
*	double pow(d1,d2)
*	double d1, d2;
*
*	Copyright Atari Corp. 1987,1988
*
*	MDJohnson       2/15/88
***

	.include fpmacro

; pow(x,y)
	fpinit	pow
	fpidle				; wait for idle state
	move.w	#$5414,FPCMD		; log(x)
	ckcir	#$9608			; ready for double
	move.l	4(sp),FPOP		; write first half
	move.l	8(sp),FPOP		; write second half

	fpidle				; wait for idle state
	move.w	#$5423,FPCMD		; y * log(x)
	ckcir	#$9608			; ready for double
	move.l	12(sp),FPOP		; write first half
	move.l	16(sp),FPOP		; write second half

	fpidle				; wait for idle state
	move.w	#$0010,FPCMD		; exp(y*log(x))

	fpidle				; wait for idle state
	move.w	#$7400,FPCMD		; fp0 -> double
	ckcir	#$B208			; ready for double
	move.l	FPOP,d0			; get double
	move.l	FPOP,d1
	rts

