Annotation of sys/arch/m68k/fpsp/MONADIC.CI5, Revision 1.1.1.1
1.1 nbrk 1: * $OpenBSD: MONADIC.CI5,v 1.2 1996/05/29 21:05:21 niklas Exp $
2: * $NetBSD: MONADIC.CI5,v 1.2 1994/10/26 07:48:39 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: * MONADIC.CI5 1.3 4/30/91
36: *
37: * MONADIC.CI5 --- MONADIC template for CI5 compiler
38: *
39:
40: xref tag
41: xref _OPr_
42: xref _OPz_
43: xref _OPi_
44: xref _OPn_
45: xref _OPm_
46:
47:
48: xdef _OPd_
49: _OPd_:
50: link a6,#-LOCAL_SIZE
51: fmovem.x fp2-fp3,USER_FP2(a6)
52: fmove.l fpsr,USER_FPSR(a6)
53: fmove.l fpcr,d1 ; user's rounding mode/precision
54: fmove.l #0,fpcr ; force rounding mode/prec to extended,rn
55: *
56: * copy, convert and tag input argument
57: *
58: fmove.d 8(a6),fp0
59: fmove.x fp0,ETEMP(a6)
60: lea ETEMP(a6),a0
61: bsr tag
62: move.b d0,STAG(a6)
63: tst.b d0
64: bne.b _TMP_2
65: bsr _OPr_ ; normalized (regular) number
66: bra.b _TMP_6
67: _TMP_2:
68: cmp.b #$20,d0 ; zero?
69: bne.b _TMP_3
70: bsr _OPz_
71: bra.b _TMP_6
72: _TMP_3:
73: cmp.b #$40,d0 ; infinity?
74: bne.b _TMP_4
75: bsr _OPi_
76: bra.b _TMP_6
77: _TMP_4:
78: cmp.b #$60,d0 ; NaN?
79: bne.b _TMP_5
80: bsr _OPn_
81: bra.b _TMP_6
82: _TMP_5:
83: bsr _OPm_ ; assuming a denorm...
84:
85: _TMP_6:
86: fmove.l fpsr,d0 ; update status register
87: or.b USER_FPSR+3(a6),d0 ;add previously accrued exceptions
88: move.l d0,USER_FPSR(a6)
89: *
90: * Result is now in FP0
91: *
92: fmovem.x USER_FP2(a6),fp2-fp3 ; note: FP1 not restored
93: unlk a6
94: rts
CVSweb