* device/lib/pic/libm: NEW, added math library functions

[fw/sdcc] / device / lib / pic / libsdcc / fs2ulong.c

diff --git a/device/lib/pic/libsdcc/fs2ulong.c b/device/lib/pic/libsdcc/fs2ulong.c
new file mode 100644 (file)
index 0000000..fd34c44
--- /dev/null
+++ b/device/lib/pic/libsdcc/fs2ulong.c
@@ -0,0 +1,49 @@
+/*
+** 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?).
+**
+** Pat Wood
+** Pipeline Associates, Inc.
+** pipeline!phw@motown.com or
+** sun!pipeline!phw or
+** uunet!motown!pipeline!phw
+*/
+
+/*
+** $Id: fs2ulong.c 3711 2005-03-31 16:25:17Z vrokas $
+*/
+
+/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
+
+#include <float.h>
+
+union float_long
+{
+  float f;
+  long l;
+};
+
+/* convert float to unsigned long */
+unsigned long __fs2ulong (float a1) _FS_REENTRANT
+{
+  FS_STATIC volatile union float_long fl1;
+  int exp;
+  long l;
+  
+  fl1.f = a1;
+  
+  if (!fl1.l || SIGN(fl1.l))
+    return (0);
+
+  exp = EXP (fl1.l) - EXCESS - 24;
+  l = MANT (fl1.l);
+  
+  l >>= -exp;
+
+  return l;
+}