xref: /src/sys/arch/m68k/fpsp/sto_res.sa

*	$NetBSD: sto_res.sa,v 1.4 2000/03/13 23:52:32 soren Exp $

*	MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
*	M68000 Hi-Performance Microprocessor Division
*	M68040 Software Package 
*
*	M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc.
*	All rights reserved.
*
*	THE SOFTWARE is provided on an "AS IS" basis and without warranty.
*	To the maximum extent permitted by applicable law,
*	MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
*	INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
*	PARTICULAR PURPOSE and any warranty against infringement with
*	regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
*	and any accompanying written materials. 
*
*	To the maximum extent permitted by applicable law,
*	IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
*	(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS
*	PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR
*	OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE
*	SOFTWARE.  Motorola assumes no responsibility for the maintenance
*	and support of the SOFTWARE.  
*
*	You are hereby granted a copyright license to use, modify, and
*	distribute the SOFTWARE so long as this entire notice is retained
*	without alteration in any modified and/or redistributed versions,
*	and that such modified versions are clearly identified as such.
*	No licenses are granted by implication, estoppel or otherwise
*	under any patents or trademarks of Motorola, Inc.

*
*	sto_res.sa 3.1 12/10/90
*
*	Takes the result and puts it in where the user expects it.
*	Library functions return result in fp0.	If fp0 is not the
*	users destination register then fp0 is moved to the
*	correct floating-point destination register.  fp0 and fp1
*	are then restored to the original contents. 
*
*	Input:	result in fp0,fp1 
*
*		d2 & a0 should be kept unmodified
*
*	Output:	moves the result to the true destination reg or mem
*
*	Modifies: destination floating point register
*

STO_RES	IDNT	2,1 Motorola 040 Floating Point Software Package


	section	8

	include	fpsp.h

	xdef	sto_cos
sto_cos:
	bfextu		CMDREG1B(a6){13:3},d0	;extract cos destination
	cmpi.b		#3,d0		;check for fp0/fp1 cases
	ble.b		c_fp0123
	fmovem.x	fp1,-(a7)
	moveq.l		#7,d1
	sub.l		d0,d1		;d1 = 7- (dest. reg. no.)
	clr.l		d0
	bset.l		d1,d0		;d0 is dynamic register mask
	fmovem.x	(a7)+,d0
	rts
c_fp0123:
	tst.b		d0
	beq.b		c_is_fp0
	cmpi.b		#1,d0
	beq.b		c_is_fp1
	cmpi.b		#2,d0
	beq.b		c_is_fp2
c_is_fp3:
	fmovem.x	fp1,USER_FP3(a6)
	rts
c_is_fp2:
	fmovem.x	fp1,USER_FP2(a6)
	rts
c_is_fp1:
	fmovem.x	fp1,USER_FP1(a6)
	rts
c_is_fp0:
	fmovem.x	fp1,USER_FP0(a6)
	rts


	xdef	sto_res
sto_res:
	bfextu		CMDREG1B(a6){6:3},d0	;extract destination register
	cmpi.b		#3,d0		;check for fp0/fp1 cases
	ble.b		fp0123
	fmovem.x	fp0,-(a7)
	moveq.l		#7,d1
	sub.l		d0,d1		;d1 = 7- (dest. reg. no.)
	clr.l		d0
	bset.l		d1,d0		;d0 is dynamic register mask
	fmovem.x	(a7)+,d0
	rts
fp0123:
	tst.b		d0
	beq.b		is_fp0
	cmpi.b		#1,d0
	beq.b		is_fp1
	cmpi.b		#2,d0
	beq.b		is_fp2
is_fp3:
	fmovem.x	fp0,USER_FP3(a6)
	rts
is_fp2:
	fmovem.x	fp0,USER_FP2(a6)
	rts
is_fp1:
	fmovem.x	fp0,USER_FP1(a6)
	rts
is_fp0:
	fmovem.x	fp0,USER_FP0(a6)
	rts

	end