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sto_res.sa revision 1.3.32.1 
      1 *	$NetBSD: sto_res.sa,v 1.3.32.1 2000/11/20 20:11:37 bouyer Exp $
      2 
      3 *	MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
      4 *	M68000 Hi-Performance Microprocessor Division
      5 *	M68040 Software Package 
      6 *
      7 *	M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc.
      8 *	All rights reserved.
      9 *
     10 *	THE SOFTWARE is provided on an "AS IS" basis and without warranty.
     11 *	To the maximum extent permitted by applicable law,
     12 *	MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
     13 *	INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
     14 *	PARTICULAR PURPOSE and any warranty against infringement with
     15 *	regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
     16 *	and any accompanying written materials. 
     17 *
     18 *	To the maximum extent permitted by applicable law,
     19 *	IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
     20 *	(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS
     21 *	PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR
     22 *	OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE
     23 *	SOFTWARE.  Motorola assumes no responsibility for the maintenance
     24 *	and support of the SOFTWARE.  
     25 *
     26 *	You are hereby granted a copyright license to use, modify, and
     27 *	distribute the SOFTWARE so long as this entire notice is retained
     28 *	without alteration in any modified and/or redistributed versions,
     29 *	and that such modified versions are clearly identified as such.
     30 *	No licenses are granted by implication, estoppel or otherwise
     31 *	under any patents or trademarks of Motorola, Inc.
     32 
     33 *
     34 *	sto_res.sa 3.1 12/10/90
     35 *
     36 *	Takes the result and puts it in where the user expects it.
     37 *	Library functions return result in fp0.	If fp0 is not the
     38 *	users destination register then fp0 is moved to the
     39 *	correct floating-point destination register.  fp0 and fp1
     40 *	are then restored to the original contents. 
     41 *
     42 *	Input:	result in fp0,fp1 
     43 *
     44 *		d2 & a0 should be kept unmodified
     45 *
     46 *	Output:	moves the result to the true destination reg or mem
     47 *
     48 *	Modifies: destination floating point register
     49 *
     50 
     51 STO_RES	IDNT	2,1 Motorola 040 Floating Point Software Package
     52 
     53 
     54 	section	8
     55 
     56 	include	fpsp.h
     57 
     58 	xdef	sto_cos
     59 sto_cos:
     60 	bfextu		CMDREG1B(a6){13:3},d0	;extract cos destination
     61 	cmpi.b		#3,d0		;check for fp0/fp1 cases
     62 	ble.b		c_fp0123
     63 	fmovem.x	fp1,-(a7)
     64 	moveq.l		#7,d1
     65 	sub.l		d0,d1		;d1 = 7- (dest. reg. no.)
     66 	clr.l		d0
     67 	bset.l		d1,d0		;d0 is dynamic register mask
     68 	fmovem.x	(a7)+,d0
     69 	rts
     70 c_fp0123:
     71 	tst.b		d0
     72 	beq.b		c_is_fp0
     73 	cmpi.b		#1,d0
     74 	beq.b		c_is_fp1
     75 	cmpi.b		#2,d0
     76 	beq.b		c_is_fp2
     77 c_is_fp3:
     78 	fmovem.x	fp1,USER_FP3(a6)
     79 	rts
     80 c_is_fp2:
     81 	fmovem.x	fp1,USER_FP2(a6)
     82 	rts
     83 c_is_fp1:
     84 	fmovem.x	fp1,USER_FP1(a6)
     85 	rts
     86 c_is_fp0:
     87 	fmovem.x	fp1,USER_FP0(a6)
     88 	rts
     89 
     90 
     91 	xdef	sto_res
     92 sto_res:
     93 	bfextu		CMDREG1B(a6){6:3},d0	;extract destination register
     94 	cmpi.b		#3,d0		;check for fp0/fp1 cases
     95 	ble.b		fp0123
     96 	fmovem.x	fp0,-(a7)
     97 	moveq.l		#7,d1
     98 	sub.l		d0,d1		;d1 = 7- (dest. reg. no.)
     99 	clr.l		d0
    100 	bset.l		d1,d0		;d0 is dynamic register mask
    101 	fmovem.x	(a7)+,d0
    102 	rts
    103 fp0123:
    104 	tst.b		d0
    105 	beq.b		is_fp0
    106 	cmpi.b		#1,d0
    107 	beq.b		is_fp1
    108 	cmpi.b		#2,d0
    109 	beq.b		is_fp2
    110 is_fp3:
    111 	fmovem.x	fp0,USER_FP3(a6)
    112 	rts
    113 is_fp2:
    114 	fmovem.x	fp0,USER_FP2(a6)
    115 	rts
    116 is_fp1:
    117 	fmovem.x	fp0,USER_FP1(a6)
    118 	rts
    119 is_fp0:
    120 	fmovem.x	fp0,USER_FP0(a6)
    121 	rts
    122 
    123 	end
    124