source: scripts/patches/glibc-vfp.patch@ f59ed2c

# Source: http://sources.redhat.com/ml/crossgcc/2004-02/msg00104.html
#
# From: Dan Kegel <dank at kegel dot com>
# To: Nicolas Pitre <nico at cam dot org>
# Cc: add <addsub at eyou dot com>, Richard dot Earnshaw at arm dot com,
#     rearnsha at arm dot com, crossgcc at sources dot redhat dot com,
#     linux-arm at lists dot arm dot linux dot org dot uk
# Date: Mon, 16 Feb 2004 22:49:35 -0800
# Subject: Re: problem while building arm vfp softfloat gcc
#
# Attached is a patch from addsub@eyou.com that he says patches glibc and
# makes printf("%f", 1.0) work again.   I haven't tested it, just wanted
# to give Nico a chance to have a look at it.  Not sure if addsub wrote
# this himself or whether it's suitable for glibc mainline (I've asked him).
# - Dan

diff -uNrp glibc.old/sysdeps/arm/bits/endian.h glibc.new/sysdeps/arm/bits/endian.h
--- glibc.old/sysdeps/arm/bits/endian.h 1999-04-12 11:59:13.000000000 -0400
+++ glibc.new/sysdeps/arm/bits/endian.h 2004-02-12 09:15:13.000000000 -0500
@@ -9,4 +9,9 @@
 #else
 #define __BYTE_ORDER __LITTLE_ENDIAN
 #endif
+
+#ifdef __VFP_FP__
+#define __FLOAT_WORD_ORDER __BYTE_ORDER
+#else
 #define __FLOAT_WORD_ORDER __BIG_ENDIAN
+#endif
diff -uNrp glibc.old/sysdeps/arm/gmp-mparam.h glibc.new/sysdeps/arm/gmp-mparam.h
--- glibc.old/sysdeps/arm/gmp-mparam.h  2001-07-07 15:21:19.000000000 -0400
+++ glibc.new/sysdeps/arm/gmp-mparam.h  2004-02-12 09:15:13.000000000 -0500
@@ -26,5 +26,13 @@ MA 02111-1307, USA. */
 #define BITS_PER_SHORTINT 16
 #define BITS_PER_CHAR 8
 
-#define IEEE_DOUBLE_BIG_ENDIAN 0
-#define IEEE_DOUBLE_MIXED_ENDIAN 1
+#if defined(__ARMEB__)
+# define IEEE_DOUBLE_MIXED_ENDIAN 0
+# define IEEE_DOUBLE_BIG_ENDIAN 1
+#elif defined(__VFP_FP__)
+# define IEEE_DOUBLE_MIXED_ENDIAN 0
+# define IEEE_DOUBLE_BIG_ENDIAN 0
+#else
+# define IEEE_DOUBLE_BIG_ENDIAN 0
+# define IEEE_DOUBLE_MIXED_ENDIAN 1
+#endif
diff -uNrp glibc.old/sysdeps/arm/ieee754.h glibc.new/sysdeps/arm/ieee754.h
--- glibc.old/sysdeps/arm/ieee754.h     2001-07-07 15:21:19.000000000 -0400
+++ glibc.new/sysdeps/arm/ieee754.h     1969-12-31 19:00:00.000000000 -0500
@@ -1,115 +0,0 @@
-/* Copyright (C) 1992, 1995, 1996, 1998 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.  */
-
-#ifndef _IEEE754_H
-
-#define _IEEE754_H 1
-#include <features.h>
-
-#include <endian.h>
-
-__BEGIN_DECLS
-
-union ieee754_float
-  {
-    float f;
-
-    /* This is the IEEE 754 single-precision format.  */
-    struct
-      {
-       unsigned int mantissa:23;
-       unsigned int exponent:8;
-       unsigned int negative:1;
-      } ieee;
-
-    /* This format makes it easier to see if a NaN is a signalling NaN.  */
-    struct
-      {
-       unsigned int mantissa:22;
-       unsigned int quiet_nan:1;
-       unsigned int exponent:8;
-       unsigned int negative:1;
-      } ieee_nan;
-  };
-
-#define IEEE754_FLOAT_BIAS     0x7f /* Added to exponent.  */
-
-
-union ieee754_double
-  {
-    double d;
-
-    /* This is the IEEE 754 double-precision format.  */
-    struct
-      {
-       unsigned int mantissa0:20;
-       unsigned int exponent:11;
-       unsigned int negative:1;
-       unsigned int mantissa1:32;
-      } ieee;
-
-    /* This format makes it easier to see if a NaN is a signalling NaN.  */
-    struct
-      {
-       unsigned int mantissa0:19;
-       unsigned int quiet_nan:1;
-       unsigned int exponent:11;
-       unsigned int negative:1;
-       unsigned int mantissa1:32;
-      } ieee_nan;
-  };
-
-#define IEEE754_DOUBLE_BIAS    0x3ff /* Added to exponent.  */
-
-
-/* The following two structures are correct for `new' floating point systems but
-   wrong for the old FPPC.  The only solution seems to be to avoid their use on
-   old hardware.  */
-
-union ieee854_long_double
-  {
-    long double d;
-
-    /* This is the IEEE 854 double-extended-precision format.  */
-    struct
-      {
-       unsigned int exponent:15;
-       unsigned int empty:16;
-       unsigned int negative:1;
-       unsigned int mantissa1:32;
-       unsigned int mantissa0:32;
-      } ieee;
-
-    /* This is for NaNs in the IEEE 854 double-extended-precision format.  */
-    struct
-      {
-       unsigned int exponent:15;
-       unsigned int empty:16;
-       unsigned int negative:1;
-       unsigned int mantissa1:32;
-       unsigned int mantissa0:30;
-       unsigned int quiet_nan:1;
-       unsigned int one:1;
-      } ieee_nan;
-  };
-
-#define IEEE854_LONG_DOUBLE_BIAS 0x3fff
-
-__END_DECLS
-
-#endif /* ieee754.h */