Change from GPL to LGPL

[fw/sdcc] / device / lib / _fs2uint.c

diff --git a/device/lib/_fs2uint.c b/device/lib/_fs2uint.c
index b49df3f4b22edd92cce681aabb9c77c530403455..0eaa2edf4b26f0757a2dc564345827df8f9adadc 100644 (file)
--- a/device/lib/_fs2uint.c
+++ b/device/lib/_fs2uint.c
@@ -1,97 +1,9 @@
-/*
-** libgcc support for software floating point.
-** Copyright (C) 1991 by Pipeline Associates, Inc.  All rights reserved.
-** Permission is granted to do *anything* you want with this file,
-** commercial or otherwise, provided this message remains intact.  So there!
-** I would appreciate receiving any updates/patches/changes that anyone
-** makes, and am willing to be the repository for said changes (am I
-** making a big mistake?).
+#include <limits.h>
 
-Warning! Only single-precision is actually implemented.  This file
-won't really be much use until double-precision is supported.
-
-However, once that is done, this file might eventually become a
-replacement for libgcc1.c.  It might also make possible
-cross-compilation for an IEEE target machine from a non-IEEE
-host such as a VAX.
-
-If you'd like to work on completing this, please talk to rms@gnu.ai.mit.edu.
-
-
-**
-** Pat Wood
-** Pipeline Associates, Inc.
-** pipeline!phw@motown.com or
-** sun!pipeline!phw or
-** uunet!motown!pipeline!phw
-**
-** 05/01/91 -- V1.0 -- first release to gcc mailing lists
-** 05/04/91 -- V1.1 -- added float and double prototypes and return values
-**                  -- fixed problems with adding and subtracting zero
-**                  -- fixed rounding in truncdfsf2
-**                  -- fixed SWAP define and tested on 386
-*/
-
-/*
-** The following are routines that replace the libgcc soft floating point
-** routines that are called automatically when -msoft-float is selected.
-** The support single and double precision IEEE format, with provisions
-** for byte-swapped machines (tested on 386).  Some of the double-precision
-** routines work at full precision, but most of the hard ones simply punt
-** and call the single precision routines, producing a loss of accuracy.
-** long long support is not assumed or included.
-** Overall accuracy is close to IEEE (actually 68882) for single-precision
-** arithmetic.  I think there may still be a 1 in 1000 chance of a bit
-** being rounded the wrong way during a multiply.  I'm not fussy enough to
-** bother with it, but if anyone is, knock yourself out.
-**
-** Efficiency has only been addressed where it was obvious that something
-** would make a big difference.  Anyone who wants to do this right for
-** best speed should go in and rewrite in assembler.
-**
-** I have tested this only on a 68030 workstation and 386/ix integrated
-** in with -msoft-float.
-*/
-
-/* the following deal with IEEE single-precision numbers */
-#define EXCESS         126
-#define SIGNBIT                ((unsigned long)0x80000000)
-#define HIDDEN         (unsigned long)(1 << 23)
-#define SIGN(fp)       ((fp >> (8*sizeof(fp)-1)) & 1)
-#define EXP(fp)                (((fp) >> 23) & (unsigned int) 0x00FF)
-#define MANT(fp)       (((fp) & (unsigned long) 0x007FFFFF) | HIDDEN)
-#define PACK(s,e,m)    ((s) | ((e) << 23) | (m))
-
-union float_long
-  {
-    float f;
-    long l;
-  };
-
-/* convert double to int */
-unsigned int 
-__fs2uint (float a1)
-{
-  volatile union float_long fl1;
-  volatile int exp;
-  volatile long l;
-
-  fl1.f = a1;
-
-  if (!fl1.l)
-    return (0);
-
-  exp = EXP (fl1.l) - EXCESS - 24;
-  l = MANT (fl1.l);
-
-  if (exp > 0)
-    return (0x7F | SIGN(fl1.l)); /* largest integer */
-
-  /* shift down until exp = 0 or l = 0 */
-  if (exp < 0 && exp > -25 && l)
-    l >>= -exp;
-  else
-    return (0);
-
-  return (SIGN(fl1.l) ? -l : l);
+/* convert float to unsigned int */
+unsigned int __fs2uint (float f) {
+  unsigned long ul=__fs2ulong(f);
+  if (ul>=UINT_MAX) return UINT_MAX;
+  return ul;
 }
+