2 ** libgcc support for software floating point.
3 ** Copyright (C) 1991 by Pipeline Associates, Inc. All rights reserved.
4 ** Permission is granted to do *anything* you want with this file,
5 ** commercial or otherwise, provided this message remains intact. So there!
6 ** I would appreciate receiving any updates/patches/changes that anyone
7 ** makes, and am willing to be the repository for said changes (am I
8 ** making a big mistake?).
11 ** Pipeline Associates, Inc.
12 ** pipeline!phw@motown.com or
13 ** sun!pipeline!phw or
14 ** uunet!motown!pipeline!phw
17 /* (c)2000: hacked a little by johan.knol@iduna.nl for sdcc */
21 /* the following deal with IEEE single-precision numbers */
23 #define SIGNBIT ((unsigned long)0x80000000)
24 #define HIDDEN (unsigned long)(1 << 23)
25 #define SIGN(fp) ((fp >> (8*sizeof(fp)-1)) & 1)
26 #define EXP(fp) (((fp) >> 23) & (unsigned int) 0x00FF)
27 #define MANT(fp) (((fp) & (unsigned long) 0x007FFFFF) | HIDDEN)
28 #define PACK(s,e,m) ((s) | ((e) << 23) | (m))
36 /* convert float to unsigned long */
40 volatile union float_long fl1;
46 if (!fl1.l || SIGN(fl1.l))
52 exp = EXP (fl1.l) - EXCESS - 24;