-/*\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: fsdiv.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
- long l;\r
- };\r
-\r
-/* divide two floats */\r
-float __fsdiv (float a1, float a2) _FS_REENTRANT\r
-{\r
- FS_STATIC volatile union float_long fl1, fl2;\r
- long result;\r
- unsigned long mask;\r
- long mant1, mant2;\r
- int exp ;\r
- char sign;\r
-\r
- fl1.f = a1;\r
- fl2.f = a2;\r
-\r
- /* subtract exponents */\r
- exp = EXP (fl1.l) ;\r
- exp -= EXP (fl2.l);\r
- exp += EXCESS;\r
-\r
- /* compute sign */\r
- sign = SIGN (fl1.l) ^ SIGN (fl2.l);\r
-\r
- /* divide by zero??? */\r
- if (!fl2.l)\r
- {/* return NaN or -NaN */\r
- fl2.l = 0x7FC00000;\r
- return (fl2.f);\r
- }\r
-\r
- /* numerator zero??? */\r
- if (!fl1.l)\r
- return (0);\r
-\r
- /* now get mantissas */\r
- mant1 = MANT (fl1.l);\r
- mant2 = MANT (fl2.l);\r
-\r
- /* this assures we have 25 bits of precision in the end */\r
- if (mant1 < mant2)\r
- {\r
- mant1 <<= 1;\r
- exp--;\r
- }\r
-\r
- /* now we perform repeated subtraction of fl2.l from fl1.l */\r
- mask = 0x1000000;\r
- result = 0;\r
- while (mask)\r
- {\r
- if (mant1 >= mant2)\r
- {\r
- result |= mask;\r
- mant1 -= mant2;\r
- }\r
- mant1 <<= 1;\r
- mask >>= 1;\r
- }\r
-\r
- /* round */\r
- result += 1;\r
-\r
- /* normalize down */\r
- exp++;\r
- result >>= 1;\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
+/*
+** 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
+*/
+
+/*
+** $Id$
+*/
+
+/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
+
+#include <float.h>
+
+union float_long
+ {
+ float f;
+ long l;
+ };
+
+/* divide two floats */
+float __fsdiv (float a1, float a2) _FS_REENTRANT
+{
+ FS_STATIC volatile union float_long fl1, fl2;
+ long result;
+ unsigned long mask;
+ long mant1, mant2;
+ int exp ;
+ char sign;
+
+ fl1.f = a1;
+ fl2.f = a2;
+
+ /* subtract exponents */
+ exp = EXP (fl1.l) ;
+ exp -= EXP (fl2.l);
+ exp += EXCESS;
+
+ /* compute sign */
+ sign = SIGN (fl1.l) ^ SIGN (fl2.l);
+
+ /* divide by zero??? */
+ if (!fl2.l)
+ {/* return NaN or -NaN */
+ fl2.l = 0x7FC00000;
+ return (fl2.f);
+ }
+
+ /* numerator zero??? */
+ if (!fl1.l)
+ return (0);
+
+ /* now get mantissas */
+ mant1 = MANT (fl1.l);
+ mant2 = MANT (fl2.l);
+
+ /* this assures we have 25 bits of precision in the end */
+ if (mant1 < mant2)
+ {
+ mant1 <<= 1;
+ exp--;
+ }
+
+ /* now we perform repeated subtraction of fl2.l from fl1.l */
+ mask = 0x1000000;
+ result = 0;
+ while (mask)
+ {
+ if (mant1 >= mant2)
+ {
+ result |= mask;
+ mant1 -= mant2;
+ }
+ mant1 <<= 1;
+ mask >>= 1;
+ }
+
+ /* round */
+ result += 1;
+
+ /* normalize down */
+ exp++;
+ result >>= 1;
+
+ result &= ~HIDDEN;
+
+ /* pack up and go home */
+ if (exp >= 0x100)
+ fl1.l = (sign ? SIGNBIT : 0) | 0x7F800000;
+ else if (exp < 0)
+ fl1.l = 0;
+ else
+ fl1.l = PACK (sign ? SIGNBIT : 0 , exp, result);
+ return (fl1.f);
+}
+