Moved from soft-fp/sysdeps/sparc/sparc64/s_scalbnl.c

1 files changed, 57 insertions, 0 deletions

diff --git a/sysdeps/sparc/sparc64/soft-fp/qp_util.c b/sysdeps/sparc/sparc64/soft-fp/qp_util.c
new file mode 100644
index 0000000000..3009b2212a
--- /dev/null
+++ b/sysdeps/sparc/sparc64/soft-fp/qp_util.c
@@ -0,0 +1,57 @@
+/* Software floating-point emulation.
+   Helper routine for _Qp_* routines.
+   Simulate exceptions using double arithmetics.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek (jj@ultra.linux.cz).
+
+   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 "soft-fp.h"
+
+static unsigned long numbers [] = {
+0x7fef000000000000UL, /* A huge double number */
+0x0010100000000000UL, /* Very tiny number */
+0x0010000000000000UL, /* Minimum normalized number */
+0x0000000000000000UL, /* Zero */
+};
+
+double __Qp_handle_exceptions(int exceptions)
+{
+  double d, *p = (double *)numbers;
+  if (exceptions & FP_EX_INVALID)
+    d = p[3]/p[3];
+  if (exceptions & FP_EX_OVERFLOW)
+    {
+      d = p[0] + p[0];
+      exceptions &= ~FP_EX_INEXACT;
+    }
+  if (exceptions & FP_EX_UNDERFLOW)
+    {
+      if (exceptions & FP_EX_INEXACT)
+        {
+	  d = p[2] * p[2];
+	  exceptions &= ~FP_EX_INEXACT;
+	}
+      else
+	d = p[1] - p[2];
+    }
+  if (exceptions & FP_EX_DIVZERO)
+    d = 1.0/p[3];
+  if (exceptions & FP_EX_INEXACT)
+    d = p[0] - p[2];
+  return d;
+}