Applied a patch by MrSunshine that adds modfl() - thanks!

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37904 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/libroot/posix/glibc/arch/generic/s_modfl.c

@@ -0,0 +1,86 @@
+/* s_modfl.c -- long double version of s_modf.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/*
+ * modfl(long double x, long double *iptr)
+ * return fraction part of x, and return x's integral part in *iptr.
+ * Method:
+ *    Bit twiddling.
+ *
+ * Exception:
+ *    No exception.
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+static const long double one = 1.0;
+#else
+static long double one = 1.0;
+#endif
+
+#ifdef __STDC__
+	long double __modfl(long double x, long double *iptr)
+#else
+	long double __modfl(x, iptr)
+	long double x,*iptr;
+#endif
+{
+	int32_t i0, i1, j0;
+	u_int32_t i, se;
+	GET_LDOUBLE_WORDS(se,i0,i1,x);
+	j0 = (se & 0x7fff) - 0x3fff; /* exponent of x */
+	if (j0 < 32) { /* integer part in high x */
+		if (j0 < 0) { /* |x|<1 */
+			SET_LDOUBLE_WORDS(*iptr,se&0x8000,0,0); /* *iptr = +-0 */
+			return x;
+		} else {
+			i = (0x7fffffff) >> j0;
+			if (((i0 & i) | i1) == 0) { /* x is integral */
+				*iptr = x;
+				SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */
+				return x;
+			} else {
+				SET_LDOUBLE_WORDS(*iptr,se,i0&(~i),0);
+				return x - *iptr;
+			}
+		}
+	} else if (j0 > 63) { /* no fraction part */
+		*iptr = x * one;
+		/* We must handle NaNs separately.  */
+		if (j0 == 0x4000 && ((i0 & 0x7fffffff) | i1))
+			return x * one;
+		SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */
+		return x;
+	} else { /* fraction part in low x */
+		i = ((u_int32_t) (0x7fffffff)) >> (j0 - 32);
+		if ((i1 & i) == 0) { /* x is integral */
+			*iptr = x;
+			SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */
+			return x;
+		} else {
+			SET_LDOUBLE_WORDS(*iptr,se,i0,i1&(~i));
+			return x - *iptr;
+		}
+	}
+}
+weak_alias (__modfl, modfl)
+

src/system/libroot/posix/glibc/arch/x86/Jamfile

@@ -61,7 +61,7 @@ local genericSources =
 	s_llround.c s_llroundf.c s_llroundl.c
 	s_lround.c s_lroundf.c s_lroundl.c
 	s_matherr.c
-	s_modf.c s_modff.c # s_modfl.c
+	s_modf.c s_modff.c s_modfl.c
 	s_nan.c s_nanf.c s_nanl.c
 	s_nextafter.c s_nextafterf.c
 	s_nexttowardl.c