[greatlrd] 21937: Fix the calc bug, modf is compelete wrong, replace it with DJGPP C version of modf with small changes from me. so it compile in ReactOS, Follow bugs did I notice in our modf 1. bug did not clear the st reg before it was use 2. bug did not load the reg right 3. bug did not handler all case

Author: greatlrd
Date: Fri May 19 03:42:50 2006
New Revision: 21937

URL: http://svn.reactos.ru/svn/reactos?rev=21937&view=rev
Log:
Fix the calc bug, modf is compelete wrong, replace it with DJGPP C version of modf with
small changes from me. so it compile in ReactOS, 
Follow bugs did I notice in our modf 
1. bug did not clear the st reg before it was use
2. bug did not load the reg right
3. bug did not handler all case 



Added:
    trunk/reactos/lib/crt/math/s_modf.c
Removed:
    trunk/reactos/lib/crt/math/fmod.c
Modified:
    trunk/reactos/lib/crt/crt.rbuild
    trunk/reactos/lib/crt/math/math.c

Modified: trunk/reactos/lib/crt/crt.rbuild
URL:
http://svn.reactos.ru/svn/reactos/trunk/reactos/lib/crt/crt.rbuild?rev=2193…
==============================================================================
--- trunk/reactos/lib/crt/crt.rbuild (original)
+++ trunk/reactos/lib/crt/crt.rbuild Fri May 19 03:42:50 2006
@@ -119,7 +119,7 @@
 		<file>jn_yn.c</file>
 		<file>ldexp.c</file>
 		<file>log10.c</file>
-		<file>modf.c</file>
+		<file>s_modf.c</file>
 		<file>pow.c</file>
 		<file>sinh.c</file>
 		<file>stubs.c</file>

Removed: trunk/reactos/lib/crt/math/fmod.c
URL:
http://svn.reactos.ru/svn/reactos/trunk/reactos/lib/crt/math/fmod.c?rev=219…
==============================================================================
--- trunk/reactos/lib/crt/math/fmod.c (original)
+++ trunk/reactos/lib/crt/math/fmod.c (removed)
@@ -1,39 +1,0 @@
-/* Math functions for i387.
-   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by John C. Bowman &lt;bowman(a)ipp-garching.mpg.de&gt;de>, 1995.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#include <math.h>
-
-double fmod (double __x, double __y);
-
-double fmod (double __x, double __y)
-{
-  register double __val;
-#ifdef __GNUC__
-  __asm __volatile__
-    ("1:        fprem\n\t"
-     "fstsw     %%ax\n\t"
-     "sahf\n\t"
-     "jp        1b"
-     : "=t" (__val) : "0" (__x), "u" (__y) :
"ax", "cc");
-#else
-  __val = linkme_fmod(__x, __y);
-#endif /*__GNUC__*/
-  return __val;
-}

Modified: trunk/reactos/lib/crt/math/math.c
URL:
http://svn.reactos.ru/svn/reactos/trunk/reactos/lib/crt/math/math.c?rev=219…
==============================================================================
--- trunk/reactos/lib/crt/math/math.c (original)
+++ trunk/reactos/lib/crt/math/math.c Fri May 19 03:42:50 2006
@@ -33,10 +33,6 @@
     return 0;
 }
 
-double linkme_fmod(double __x, double __y)
-{
-    return fmod(__x, __y);
-}
 
 double linkme_sqrt(double __x)
 {

Added: trunk/reactos/lib/crt/math/s_modf.c
URL:
http://svn.reactos.ru/svn/reactos/trunk/reactos/lib/crt/math/s_modf.c?rev=2…
==============================================================================
--- trunk/reactos/lib/crt/math/s_modf.c (added)
+++ trunk/reactos/lib/crt/math/s_modf.c Fri May 19 03:42:50 2006
@@ -1,0 +1,194 @@
+
+
+/* @(#)s_modf.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+FUNCTION
+       <<modf>>, <<modff>>---split fractional and integer parts
+
+INDEX
+	modf
+INDEX
+	modff
+
+ANSI_SYNOPSIS
+	#include <math.h>
+	double modf(double <[val]>, double *<[ipart]>);
+        float modff(float <[val]>, float *<[ipart]>);
+
+TRAD_SYNOPSIS
+	#include <math.h>
+	double modf(<[val]>, <[ipart]>)
+        double <[val]>;
+        double *<[ipart]>;
+
+	float modff(<[val]>, <[ipart]>)
+	float <[val]>;
+        float *<[ipart]>;
+
+DESCRIPTION
+	<<modf>> splits the double <[val]> apart into an integer part
+	and a fractional part, returning the fractional part and
+	storing the integer part in <<*<[ipart]>>>.  No rounding
+	whatsoever is done; the sum of the integer and fractional
+	parts is guaranteed to be exactly  equal to <[val]>.   That
+	is, if . <[realpart]> = modf(<[val]>, &<[intpart]>); then
+	`<<<[realpart]>+<[intpart]>>>' is the same as
<[val]>.
+	<<modff>> is identical, save that it takes and returns
+	<<float>> rather than <<double>> values. 
+
+RETURNS
+	The fractional part is returned.  Each result has the same
+	sign as the supplied argument <[val]>.
+
+PORTABILITY
+	<<modf>> is ANSI C. <<modff>> is an extension.
+
+QUICKREF
+	modf  ansi pure 
+	modff - pure
+
+*/
+
+/*
+ * modf(double x, double *iptr) 
+ * return fraction part of x, and return x's integral part in *iptr.
+ * Method:
+ *	Bit twiddling.
+ *
+ * Exception:
+ *	No exception.
+ */
+
+
+static const double one = 1.0;
+
+#define __int32_t long
+#define __uint32_t unsigned long
+#define __IEEE_LITTLE_ENDIAN
+
+#ifdef __IEEE_BIG_ENDIAN
+
+typedef union 
+{
+  struct 
+  {
+    __uint32_t msw;
+    __uint32_t lsw;
+  } parts;
+  double value;
+} ieee_double_shape_type;
+
+#endif
+
+#ifdef __IEEE_LITTLE_ENDIAN
+
+typedef union 
+{
+  struct 
+  {
+    __uint32_t lsw;
+    __uint32_t msw;
+  } parts;
+  double value;
+} ieee_double_shape_type;
+
+#endif
+
+
+/* Get two 32 bit ints from a double.  */
+
+#define EXTRACT_WORDS(ix0,ix1,d)				\
+do {								\
+  ieee_double_shape_type ew_u;					\
+  ew_u.value = (d);						\
+  (ix0) = ew_u.parts.msw;					\
+  (ix1) = ew_u.parts.lsw;					\
+} while (0)
+
+/* Get the more significant 32 bit int from a double.  */
+
+#define GET_HIGH_WORD(i,d)					\
+do {								\
+  ieee_double_shape_type gh_u;					\
+  gh_u.value = (d);						\
+  (i) = gh_u.parts.msw;						\
+} while (0)
+
+/* Get the less significant 32 bit int from a double.  */
+
+#define GET_LOW_WORD(i,d)					\
+do {								\
+  ieee_double_shape_type gl_u;					\
+  gl_u.value = (d);						\
+  (i) = gl_u.parts.lsw;						\
+} while (0)
+
+/* Set a double from two 32 bit ints.  */
+
+#define INSERT_WORDS(d,ix0,ix1)					\
+do {								\
+  ieee_double_shape_type iw_u;					\
+  iw_u.parts.msw = (ix0);					\
+  iw_u.parts.lsw = (ix1);					\
+  (d) = iw_u.value;						\
+} while (0)
+
+
+
+
+double modf(double x, double *iptr)
+{
+	__int32_t i0,i1,j_0;
+	__uint32_t i;
+	EXTRACT_WORDS(i0,i1,x);
+	j_0 = ((i0>>20)&0x7ff)-0x3ff;	/* exponent of x */
+	if(j_0<20) {			/* integer part in high x */
+	    if(j_0<0) {			/* |x|<1 */
+	        INSERT_WORDS(*iptr,i0&0x80000000U,0);	/* *iptr = +-0 */
+		return x;
+	    } else {
+		i = (0x000fffff)>>j_0;
+		if(((i0&i)|i1)==0) {		/* x is integral */
+		    __uint32_t high;
+		    *iptr = x;
+		    GET_HIGH_WORD(high,x);
+		    INSERT_WORDS(x,high&0x80000000U,0);	/* return +-0 */
+		    return x;
+		} else {
+		    INSERT_WORDS(*iptr,i0&(~i),0);
+		    return x - *iptr;
+		}
+	    }
+	} else if (j_0>51) {		/* no fraction part */
+	    __uint32_t high;
+	    *iptr = x*one;
+	    GET_HIGH_WORD(high,x);
+	    INSERT_WORDS(x,high&0x80000000U,0);	/* return +-0 */
+	    return x;
+	} else {			/* fraction part in low x */
+	    i = ((__uint32_t)(0xffffffffU))>>(j_0-20);
+	    if((i1&i)==0) { 		/* x is integral */
+	        __uint32_t high;
+		*iptr = x;
+		GET_HIGH_WORD(high,x);
+		INSERT_WORDS(x,high&0x80000000U,0);	/* return +-0 */
+		return x;
+	    } else {
+	        INSERT_WORDS(*iptr,i0,i1&(~i));
+		return x - *iptr;
+	    }
+	}
+}
+
+//#endif /* _DOUBLE_IS_32BITS */