From a2c8310fb086cf1f3827b31217c5bb106b8080cd Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Thu, 26 Jun 2003 16:18:13 +0000
Subject: * sysdeps/m68k/fpu/bits/mathinline.h: Don't inline frexp.

* sysdeps/m68k/fpu/s_frexp.c: Put implementation here.
* sysdeps/m68k/fpu/s_frexpl.c: Fix to handle unnormalized numbers.
---
 sysdeps/m68k/fpu/s_frexpl.c | 62 ++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 59 insertions(+), 3 deletions(-)

(limited to 'sysdeps/m68k/fpu/s_frexpl.c')

diff --git a/sysdeps/m68k/fpu/s_frexpl.c b/sysdeps/m68k/fpu/s_frexpl.c
index fe9466f3be..f9a5315265 100644
--- a/sysdeps/m68k/fpu/s_frexpl.c
+++ b/sysdeps/m68k/fpu/s_frexpl.c
@@ -1,3 +1,59 @@
-#define FUNC frexpl
-#define float_type long double
-#include <s_frexp.c>
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <math.h>
+
+long double
+__frexpl (long double value, int *expptr)
+{
+  long double mantissa, exponent;
+  int iexponent;
+  unsigned long fpsr;
+
+  __asm ("ftst%.x %1\n"
+	 "fmove%.l %/fpsr, %0"
+	 : "=dm" (fpsr) : "f" (value));
+  if (fpsr & (7 << 24))
+    {
+      /* Not finite or zero.  */
+      *expptr = 0;
+      return value;
+    }
+  __asm ("fgetexp%.x %1, %0" : "=f" (exponent) : "f" (value));
+  iexponent = (int) exponent + 1;
+  *expptr = iexponent;
+  /* Unnormalized numbers must be handled specially, otherwise fscale
+     results in overflow.  */
+  if (iexponent <= -16384)
+    {
+      value *= 0x1p16383L;
+      iexponent += 16383;
+    }
+  else if (iexponent >= 16384)
+    {
+      value *= 0x1p-16383L;
+      iexponent -= 16383;
+    }
+
+  __asm ("fscale%.l %2, %0"
+	 : "=f" (mantissa)
+	 : "0" (value), "dmi" (-iexponent));
+  return mantissa;
+}
+
+weak_alias (__frexpl, frexpl)
-- 
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