1 files changed, 97 insertions, 0 deletions
diff --git a/libgcc/config/s390/32/_fixdfdi.c b/libgcc/config/s390/32/_fixdfdi.c
new file mode 100644
index 0000000000..364849c2d5
--- /dev/null
+++ b/libgcc/config/s390/32/_fixdfdi.c
@@ -0,0 +1,97 @@
+/* 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.upper) >> 20) & 0x7FF)
+#define EXCESSD		1022
+#define SIGNBIT		0x80000000
+#define SIGND(fp)	((fp.l.upper) & SIGNBIT)
+#define MANTD_LL(fp)	((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
+#define FRACD_LL(fp)	(fp.ll & (HIDDEND_LL-1))
+#define HIDDEND_LL	((UDItype_x)1 << 52)
+
+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 {
+    double d;
+    struct {
+      SItype_x upper;
+      USItype_x lower;
+    } l;
+    UDItype_x ll;
+};
+
+DItype_x __fixdfdi (double a1);
+
+/* convert double to int */
+DItype_x
+__fixdfdi (double a1)
+{
+    register union double_long dl1;
+    register int exp;
+    register DItype_x l;
+
+    dl1.d = a1;
+
+    /* +/- 0, denormalized */
+
+    if (!EXPD (dl1))
+      return 0;
+
+    exp = EXPD (dl1) - EXCESSD - 53;
+
+    /* number < 1 */
+
+    if (exp < -53)
+      return 0;
+
+    /* NaN */
+
+    if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
+      return 0x8000000000000000ULL;
+
+    /* Number big number & +/- inf */
+
+    if (exp >= 11) {
+	l = (long long)1<<63;
+	if (!SIGND(dl1))
+	    l--;
+	return l;
+    }
+
+    l = MANTD_LL(dl1);
+
+    /* shift down until exp < 12 or l = 0 */
+    if (exp > 0)
+      l <<= exp;
+    else
+      l >>= -exp;
+
+    return (SIGND (dl1) ? -l : l);
+}