* device/lib/pic/libsdcc/fsdiv.c,

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

diff --git a/device/lib/pic/libsdcc/fsmul.c b/device/lib/pic/libsdcc/fsmul.c
index 93cc9ccccdf03096515edb907bc7da4a23bd2598..9752800c6cbfc216ebe30d06e50a3a8f7fc7e51d 100644 (file)
--- a/device/lib/pic/libsdcc/fsmul.c
+++ b/device/lib/pic/libsdcc/fsmul.c
@@ -1,81 +1,86 @@
-/*
-** 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: fsmul.c 3513 2004-10-01 14:49:51Z vrokas $
-*/
-
-/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
-
-#include <float.h>
-
-union float_long
-  {
-    float f;
-    unsigned long l;
-  };
-
-/* multiply two floats */
-float __fsmul (float a1, float a2) _FS_REENTRANT
-{
-  FS_STATIC volatile union float_long fl1, fl2;
-  unsigned long result;
-  int exp;
-  char sign;
-  
-  fl1.f = a1;
-  fl2.f = a2;
-
-  if (!fl1.l || !fl2.l)
-    return (0);
-
-  /* compute sign and exponent */
-  sign = SIGN (fl1.l) ^ SIGN (fl2.l);
-  exp = EXP (fl1.l) - EXCESS;
-  exp += EXP (fl2.l);
-
-  fl1.l = MANT (fl1.l);
-  fl2.l = MANT (fl2.l);
-
-  /* the multiply is done as one 16x16 multiply and two 16x8 multiples */
-  result = (fl1.l >> 8) * (fl2.l >> 8);
-  result += ((fl1.l & (unsigned long) 0xFF) * (fl2.l >> 8)) >> 8;
-  result += ((fl2.l & (unsigned long) 0xFF) * (fl1.l >> 8)) >> 8;
-
-  if (0 != (result & SIGNBIT))
-    {
-      /* round */
-      result += 0x80;
-      result >>= 8;
-    }
-  else
-    {
-      /* round */
-      result += 0x40;
-      result >>= 7;
-      exp--;
-    }
-
-  result &= ~HIDDEN;
-
-  /* pack up and go home */
-  fl1.l = PACK (sign ? SIGNBIT : 0 , (unsigned long)exp, result);  
-  return (fl1.f);
-}
-
-
-
-
+/*\r
+** libgcc support for software floating point.\r
+** Copyright (C) 1991 by Pipeline Associates, Inc.  All rights reserved.\r
+** Permission is granted to do *anything* you want with this file,\r
+** commercial or otherwise, provided this message remains intact.  So there!\r
+** I would appreciate receiving any updates/patches/changes that anyone\r
+** makes, and am willing to be the repository for said changes (am I\r
+** making a big mistake?).\r
+**\r
+** Pat Wood\r
+** Pipeline Associates, Inc.\r
+** pipeline!phw@motown.com or\r
+** sun!pipeline!phw or\r
+** uunet!motown!pipeline!phw\r
+*/\r
+\r
+/*\r
+** $Id: fsmul.c 3513 2004-10-01 14:49:51Z vrokas $\r
+*/\r
+\r
+/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */\r
+\r
+#include <float.h>\r
+\r
+union float_long\r
+  {\r
+    float f;\r
+    unsigned long l;\r
+  };\r
+\r
+/* multiply two floats */\r
+float __fsmul (float a1, float a2) _FS_REENTRANT\r
+{\r
+  FS_STATIC volatile union float_long fl1, fl2;\r
+  unsigned long result;\r
+  int exp;\r
+  char sign;\r
+  \r
+  fl1.f = a1;\r
+  fl2.f = a2;\r
+\r
+  if (!fl1.l || !fl2.l)\r
+    return (0);\r
+\r
+  /* compute sign and exponent */\r
+  sign = SIGN (fl1.l) ^ SIGN (fl2.l);\r
+  exp = EXP (fl1.l) - EXCESS;\r
+  exp += EXP (fl2.l);\r
+\r
+  fl1.l = MANT (fl1.l);\r
+  fl2.l = MANT (fl2.l);\r
+\r
+  /* the multiply is done as one 16x16 multiply and two 16x8 multiples */\r
+  result = (fl1.l >> 8) * (fl2.l >> 8);\r
+  result += ((fl1.l & (unsigned long) 0xFF) * (fl2.l >> 8)) >> 8;\r
+  result += ((fl2.l & (unsigned long) 0xFF) * (fl1.l >> 8)) >> 8;\r
+\r
+  if (0 != (result & SIGNBIT))\r
+    {\r
+      /* round */\r
+      result += 0x80;\r
+      result >>= 8;\r
+    }\r
+  else\r
+    {\r
+      /* round */\r
+      result += 0x40;\r
+      result >>= 7;\r
+      exp--;\r
+    }\r
+\r
+  result &= ~HIDDEN;\r
+\r
+  /* pack up and go home */\r
+  if (exp >= 0x100)\r
+    fl1.l = (sign ? SIGNBIT : 0) | 0x7F800000;\r
+  else if (exp < 0)\r
+    fl1.l = 0;\r
+  else\r
+    fl1.l = PACK (sign ? SIGNBIT : 0 , exp, result);\r
+  return (fl1.f);\r
+}\r
+\r
+\r
+\r
+\r