--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgcc/config/s390/32/_fixtfdi.c	Fri Feb 12 23:39:51 2010 +0900
@@ -0,0 +1,102 @@
+/* Definitions of target machine for GNU compiler, for IBM S/390
+   Copyright (C) 1999, 2000, 2001, 2007, 2008 and 2009
+   Free Software Foundation, Inc.
+   Contributed by Hartmut Penner (hpenner@de.ibm.com) and
+                  Ulrich Weigand (uweigand@de.ibm.com).
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#define EXPD(fp)	   (((fp.l.i[0]) >> 16) & 0x7FFF)
+#define EXPONENT_BIAS	   16383
+#define MANTISSA_BITS      112
+#define PRECISION          (MANTISSA_BITS + 1)
+#define SIGNBIT		   0x80000000
+#define SIGND(fp)	   ((fp.l.i[0]) & SIGNBIT)
+#define MANTD_HIGH_LL(fp)  ((fp.ll[0] & HIGH_LL_FRAC_MASK) | HIGH_LL_UNIT_BIT)
+#define MANTD_LOW_LL(fp)   (fp.ll[1])
+#define FRACD_ZERO_P(fp)   (!fp.ll[1] && !(fp.ll[0] & HIGH_LL_FRAC_MASK))
+#define HIGH_LL_FRAC_BITS  48
+#define HIGH_LL_UNIT_BIT   ((UDItype_x)1 << HIGH_LL_FRAC_BITS)
+#define HIGH_LL_FRAC_MASK  (HIGH_LL_UNIT_BIT - 1)
+
+typedef int DItype_x __attribute__ ((mode (DI)));
+typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
+typedef int SItype_x __attribute__ ((mode (SI)));
+typedef unsigned int USItype_x __attribute__ ((mode (SI)));
+
+union double_long {
+  long double d;
+  struct {
+      SItype_x i[4]; /* 32 bit parts: 0 upper ... 3 lowest */
+    } l;
+  UDItype_x ll[2];   /* 64 bit parts: 0 upper, 1 lower */
+};
+
+DItype_x __fixtfdi (long double a1);
+
+/* convert double to unsigned int */
+DItype_x
+__fixtfdi (long double a1)
+{
+    register union double_long dl1;
+    register int exp;
+    register UDItype_x l;
+
+    dl1.d = a1;
+
+    /* +/- 0, denormalized */
+    if (!EXPD (dl1))
+      return 0;
+
+    /* The exponent - considered the binary point at the right end of
+       the mantissa.  */
+    exp = EXPD (dl1) - EXPONENT_BIAS - MANTISSA_BITS;
+
+    /* number < 1: If the mantissa would need to be right-shifted more bits than
+       its size the result would be zero.  */
+    if (exp <= -PRECISION)
+      return 0;
+
+    /* NaN: All exponent bits set and a nonzero fraction.  */
+    if ((EXPD(dl1) == 0x7fff) && !FRACD_ZERO_P (dl1))
+      return 0x8000000000000000ULL;
+
+    /* One extra bit is needed for the unit bit which is appended by
+       MANTD_HIGH_LL on the left of the matissa.  */
+    exp += HIGH_LL_FRAC_BITS + 1;
+
+    /* If the result would still need a left shift it will be too large
+       to be represented.  Compared to the unsigned variant we have to
+       take care that there is still space for the sign bit to be
+       applied.  So we can only go on if there is a right-shift by one
+       or more.  */
+    if (exp >= 0)
+      {
+	l = 1ULL << 63; /* long long min */
+	return SIGND (dl1) ? l : l - 1;
+      }
+
+    l = MANTD_LOW_LL (dl1) >> (HIGH_LL_FRAC_BITS + 1)
+        | MANTD_HIGH_LL (dl1) << (64 - (HIGH_LL_FRAC_BITS + 1));
+
+    return SIGND (dl1) ? -(l >> -exp) : l >> -exp;
+}