Ticket #6418: haiku-modfl.patch

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

@@ -61 +61 @@
     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

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

@@ +1 @@
+/* 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)
+