Annotation of sys/arch/m68k/fpsp/sto_res.sa, Revision 1.1.1.1
1.1 nbrk 1: * $OpenBSD: sto_res.sa,v 1.3 2003/11/07 10:36:10 miod Exp $
2: * $NetBSD: sto_res.sa,v 1.3 1994/10/26 07:50:14 cgd Exp $
3:
4: * MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
5: * M68000 Hi-Performance Microprocessor Division
6: * M68040 Software Package
7: *
8: * M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc.
9: * All rights reserved.
10: *
11: * THE SOFTWARE is provided on an "AS IS" basis and without warranty.
12: * To the maximum extent permitted by applicable law,
13: * MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
14: * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
15: * PARTICULAR PURPOSE and any warranty against infringement with
16: * regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
17: * and any accompanying written materials.
18: *
19: * To the maximum extent permitted by applicable law,
20: * IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
21: * (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS
22: * PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR
23: * OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE
24: * SOFTWARE. Motorola assumes no responsibility for the maintenance
25: * and support of the SOFTWARE.
26: *
27: * You are hereby granted a copyright license to use, modify, and
28: * distribute the SOFTWARE so long as this entire notice is retained
29: * without alteration in any modified and/or redistributed versions,
30: * and that such modified versions are clearly identified as such.
31: * No licenses are granted by implication, estoppel or otherwise
32: * under any patents or trademarks of Motorola, Inc.
33:
34: *
35: * sto_res.sa 3.1 12/10/90
36: *
37: * Takes the result and puts it in where the user expects it.
38: * Library functions return result in fp0. If fp0 is not the
39: * users destination register then fp0 is moved to the
40: * correct floating-point destination register. fp0 and fp1
41: * are then restored to the original contents.
42: *
43: * Input: result in fp0,fp1
44: *
45: * d2 & a0 should be kept unmodified
46: *
47: * Output: moves the result to the true destination reg or mem
48: *
49: * Modifies: destination floating point register
50: *
51:
52: STO_RES IDNT 2,1 Motorola 040 Floating Point Software Package
53:
54:
55: section 8
56:
57: include fpsp.h
58:
59: xdef sto_cos
60: sto_cos:
61: bfextu CMDREG1B(a6){13:3},d0 ;extract cos destination
62: cmpi.b #3,d0 ;check for fp0/fp1 cases
63: ble.b c_fp0123
64: fmovem.x fp1,-(a7)
65: moveq.l #7,d1
66: sub.l d0,d1 ;d1 = 7- (dest. reg. no.)
67: clr.l d0
68: bset.l d1,d0 ;d0 is dynamic register mask
69: fmovem.x (a7)+,d0
70: rts
71: c_fp0123:
72: tst.b d0
73: beq.b c_is_fp0
74: cmpi.b #1,d0
75: beq.b c_is_fp1
76: cmpi.b #2,d0
77: beq.b c_is_fp2
78: c_is_fp3:
79: fmovem.x fp1,USER_FP3(a6)
80: rts
81: c_is_fp2:
82: fmovem.x fp1,USER_FP2(a6)
83: rts
84: c_is_fp1:
85: fmovem.x fp1,USER_FP1(a6)
86: rts
87: c_is_fp0:
88: fmovem.x fp1,USER_FP0(a6)
89: rts
90:
91:
92: xdef sto_res
93: sto_res:
94: bfextu CMDREG1B(a6){6:3},d0 ;extract destination register
95: cmpi.b #3,d0 ;check for fp0/fp1 cases
96: ble.b fp0123
97: fmovem.x fp0,-(a7)
98: moveq.l #7,d1
99: sub.l d0,d1 ;d1 = 7- (dest. reg. no.)
100: clr.l d0
101: bset.l d1,d0 ;d0 is dynamic register mask
102: fmovem.x (a7)+,d0
103: rts
104: fp0123:
105: tst.b d0
106: beq.b is_fp0
107: cmpi.b #1,d0
108: beq.b is_fp1
109: cmpi.b #2,d0
110: beq.b is_fp2
111: is_fp3:
112: fmovem.x fp0,USER_FP3(a6)
113: rts
114: is_fp2:
115: fmovem.x fp0,USER_FP2(a6)
116: rts
117: is_fp1:
118: fmovem.x fp0,USER_FP1(a6)
119: rts
120: is_fp0:
121: fmovem.x fp0,USER_FP0(a6)
122: rts
123:
124: end
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