This was accidently not svn added when the compiler was updated.

Update coreboot crossgcc toolchain, GDB 4.5.1, MPFR 3.0.0, GDB 7.2.                                                         
Add libelf_cv_elf_h_works=no to produce a libelf.h for Cygwin.                                                              
Add GDB patch to handle #pragma pack in the i386-elf gcc target.                                                            
                                                                                                                            
Signed-off-by: Marc Jones <marcj303@gmail.com>                                                                              
Acked-by: Stefan Reinauer <stepan@coreboot.org>                                                                             



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6193 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

2 files changed, 1678 insertions, 0 deletions

diff --git a/util/crossgcc/patches/gcc-4.5.1_pragma.patch b/util/crossgcc/patches/gcc-4.5.1_pragma.patch
new file mode 100644
index 0000000000..36ac8f47c6
--- /dev/null
+++ b/util/crossgcc/patches/gcc-4.5.1_pragma.patch
@@ -0,0 +1,10 @@
+diff -ur gcc-4.5.1.orig/gcc/config/i386/i386elf.h gcc-4.5.1/gcc/config/i386/i386elf.h
+--- gcc-4.5.1.orig/gcc/config/i386/i386elf.h	2010-11-17 19:48:16.184401200 -0700
++++ gcc-4.5.1/gcc/config/i386/i386elf.h	2010-11-17 20:52:54.443969900 -0700
+@@ -123,3 +123,6 @@
+ #undef ASM_OUTPUT_ALIGNED_BSS
+ #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
++
++/* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop).  */
++#define HANDLE_PRAGMA_PACK_PUSH_POP 1
diff --git a/util/crossgcc/patches/mpfr-3.0.0_allpatches_20101117.patch b/util/crossgcc/patches/mpfr-3.0.0_allpatches_20101117.patch
new file mode 100644
index 0000000000..5bd14b4436
--- /dev/null
+++ b/util/crossgcc/patches/mpfr-3.0.0_allpatches_20101117.patch
@@ -0,0 +1,1668 @@
+diff -rupN mpfr-3.0.0.orig/Makefile.in mpfr-3.0.0/Makefile.in
+--- mpfr-3.0.0.orig/Makefile.in	2010-11-17 14:50:50.054040400 -0700
++++ mpfr-3.0.0/Makefile.in	2010-06-10 05:00:52.000000000 -0600
+@@ -239,6 +239,7 @@ GZIP_ENV = --best
+ distuninstallcheck_listfiles = find . -type f -print
+ distcleancheck_listfiles = find . -type f -print
+ ACLOCAL = @ACLOCAL@
++ALLOCA = @ALLOCA@
+ AMTAR = @AMTAR@
+ AR = @AR@
+ AS = @AS@
+diff -rupN mpfr-3.0.0.orig/PATCHES mpfr-3.0.0/PATCHES
+--- mpfr-3.0.0.orig/PATCHES	2010-11-17 14:50:50.081041900 -0700
++++ mpfr-3.0.0/PATCHES	2010-11-17 14:51:05.016295800 -0700
+@@ -0,0 +1,8 @@
++macros
++mpfr_set_ld
++mpfr_sub1
++tcan_round
++mpfr_cmp/set_ui/si
++gamma_underflow
++alloca
++mpfr_out_str
+diff -rupN mpfr-3.0.0.orig/VERSION mpfr-3.0.0/VERSION
+--- mpfr-3.0.0.orig/VERSION	2010-11-17 14:50:50.821082000 -0700
++++ mpfr-3.0.0/VERSION	2010-11-09 08:15:07.000000000 -0700
+@@ -1 +1 @@
+-3.0.0
++3.0.0-p8
+diff -rupN mpfr-3.0.0.orig/acinclude.m4 mpfr-3.0.0/acinclude.m4
+--- mpfr-3.0.0.orig/acinclude.m4	2010-11-17 14:50:49.896031300 -0700
++++ mpfr-3.0.0/acinclude.m4	2010-06-10 05:00:14.000000000 -0600
+@@ -59,6 +59,9 @@ AC_CHECK_HEADER([stdarg.h],[AC_DEFINE([H
+ dnl sys/fpu.h - MIPS specific
+ AC_CHECK_HEADERS([sys/time.h sys/fpu.h])
+
++dnl Check how to get `alloca'
++AC_FUNC_ALLOCA
++
+ dnl SIZE_MAX macro
+ gl_SIZE_MAX
+
+diff -rupN mpfr-3.0.0.orig/configure mpfr-3.0.0/configure
+--- mpfr-3.0.0.orig/configure	2010-11-17 14:50:49.945034100 -0700
++++ mpfr-3.0.0/configure	2010-06-25 07:23:05.000000000 -0600
+@@ -783,6 +783,7 @@ LIBTOOL
+ OBJDUMP
+ DLLTOOL
+ AS
++ALLOCA
+ MPFR_LIBM
+ ANSI2KNR
+ U
+@@ -5622,6 +5623,197 @@ fi
+ done
+
+
++# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
++# for constant arguments.  Useless!
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working alloca.h" >&5
++$as_echo_n "checking for working alloca.h... " >&6; }
++if test "${ac_cv_working_alloca_h+set}" = set; then :
++  $as_echo_n "(cached) " >&6
++else
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h.  */
++#include <alloca.h>
++int
++main ()
++{
++char *p = (char *) alloca (2 * sizeof (int));
++			  if (p) return 0;
++  ;
++  return 0;
++}
++_ACEOF
++if ac_fn_c_try_link "$LINENO"; then :
++  ac_cv_working_alloca_h=yes
++else
++  ac_cv_working_alloca_h=no
++fi
++rm -f core conftest.err conftest.$ac_objext \
++    conftest$ac_exeext conftest.$ac_ext
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_working_alloca_h" >&5
++$as_echo "$ac_cv_working_alloca_h" >&6; }
++if test $ac_cv_working_alloca_h = yes; then
++
++$as_echo "#define HAVE_ALLOCA_H 1" >>confdefs.h
++
++fi
++
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for alloca" >&5
++$as_echo_n "checking for alloca... " >&6; }
++if test "${ac_cv_func_alloca_works+set}" = set; then :
++  $as_echo_n "(cached) " >&6
++else
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h.  */
++#ifdef __GNUC__
++# define alloca __builtin_alloca
++#else
++# ifdef _MSC_VER
++#  include <malloc.h>
++#  define alloca _alloca
++# else
++#  ifdef HAVE_ALLOCA_H
++#   include <alloca.h>
++#  else
++#   ifdef _AIX
++ #pragma alloca
++#   else
++#    ifndef alloca /* predefined by HP cc +Olibcalls */
++char *alloca ();
++#    endif
++#   endif
++#  endif
++# endif
++#endif
++
++int
++main ()
++{
++char *p = (char *) alloca (1);
++				    if (p) return 0;
++  ;
++  return 0;
++}
++_ACEOF
++if ac_fn_c_try_link "$LINENO"; then :
++  ac_cv_func_alloca_works=yes
++else
++  ac_cv_func_alloca_works=no
++fi
++rm -f core conftest.err conftest.$ac_objext \
++    conftest$ac_exeext conftest.$ac_ext
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_alloca_works" >&5
++$as_echo "$ac_cv_func_alloca_works" >&6; }
++
++if test $ac_cv_func_alloca_works = yes; then
++
++$as_echo "#define HAVE_ALLOCA 1" >>confdefs.h
++
++else
++  # The SVR3 libPW and SVR4 libucb both contain incompatible functions
++# that cause trouble.  Some versions do not even contain alloca or
++# contain a buggy version.  If you still want to use their alloca,
++# use ar to extract alloca.o from them instead of compiling alloca.c.
++
++ALLOCA=\${LIBOBJDIR}alloca.$ac_objext
++
++$as_echo "#define C_ALLOCA 1" >>confdefs.h
++
++
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether \`alloca.c' needs Cray hooks" >&5
++$as_echo_n "checking whether \`alloca.c' needs Cray hooks... " >&6; }
++if test "${ac_cv_os_cray+set}" = set; then :
++  $as_echo_n "(cached) " >&6
++else
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h.  */
++#if defined CRAY && ! defined CRAY2
++webecray
++#else
++wenotbecray
++#endif
++
++_ACEOF
++if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
++  $EGREP "webecray" >/dev/null 2>&1; then :
++  ac_cv_os_cray=yes
++else
++  ac_cv_os_cray=no
++fi
++rm -f conftest*
++
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_os_cray" >&5
++$as_echo "$ac_cv_os_cray" >&6; }
++if test $ac_cv_os_cray = yes; then
++  for ac_func in _getb67 GETB67 getb67; do
++    as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
++ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
++eval as_val=\$$as_ac_var
++   if test "x$as_val" = x""yes; then :
++
++cat >>confdefs.h <<_ACEOF
++#define CRAY_STACKSEG_END $ac_func
++_ACEOF
++
++    break
++fi
++
++  done
++fi
++
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking stack direction for C alloca" >&5
++$as_echo_n "checking stack direction for C alloca... " >&6; }
++if test "${ac_cv_c_stack_direction+set}" = set; then :
++  $as_echo_n "(cached) " >&6
++else
++  if test "$cross_compiling" = yes; then :
++  ac_cv_c_stack_direction=0
++else
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h.  */
++$ac_includes_default
++int
++find_stack_direction ()
++{
++  static char *addr = 0;
++  auto char dummy;
++  if (addr == 0)
++    {
++      addr = &dummy;
++      return find_stack_direction ();
++    }
++  else
++    return (&dummy > addr) ? 1 : -1;
++}
++
++int
++main ()
++{
++  return find_stack_direction () < 0;
++}
++_ACEOF
++if ac_fn_c_try_run "$LINENO"; then :
++  ac_cv_c_stack_direction=1
++else
++  ac_cv_c_stack_direction=-1
++fi
++rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
++  conftest.$ac_objext conftest.beam conftest.$ac_ext
++fi
++
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_stack_direction" >&5
++$as_echo "$ac_cv_c_stack_direction" >&6; }
++cat >>confdefs.h <<_ACEOF
++#define STACK_DIRECTION $ac_cv_c_stack_direction
++_ACEOF
++
++
++fi
++
++
+
+   for ac_header in stdint.h
+ do :
+@@ -7564,13 +7756,13 @@ if test "${lt_cv_nm_interface+set}" = se
+ else
+   lt_cv_nm_interface="BSD nm"
+   echo "int some_variable = 0;" > conftest.$ac_ext
+-  (eval echo "\"\$as_me:7567: $ac_compile\"" >&5)
++  (eval echo "\"\$as_me:7759: $ac_compile\"" >&5)
+   (eval "$ac_compile" 2>conftest.err)
+   cat conftest.err >&5
+-  (eval echo "\"\$as_me:7570: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
++  (eval echo "\"\$as_me:7762: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
+   cat conftest.err >&5
+-  (eval echo "\"\$as_me:7573: output\"" >&5)
++  (eval echo "\"\$as_me:7765: output\"" >&5)
+   cat conftest.out >&5
+   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
+     lt_cv_nm_interface="MS dumpbin"
+@@ -8772,7 +8964,7 @@ ia64-*-hpux*)
+   ;;
+ *-*-irix6*)
+   # Find out which ABI we are using.
+-  echo '#line 8775 "configure"' > conftest.$ac_ext
++  echo '#line 8967 "configure"' > conftest.$ac_ext
+   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+   (eval $ac_compile) 2>&5
+   ac_status=$?
+@@ -10032,11 +10224,11 @@ else
+    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+    -e 's:$: $lt_compiler_flag:'`
+-   (eval echo "\"\$as_me:10035: $lt_compile\"" >&5)
++   (eval echo "\"\$as_me:10227: $lt_compile\"" >&5)
+    (eval "$lt_compile" 2>conftest.err)
+    ac_status=$?
+    cat conftest.err >&5
+-   echo "$as_me:10039: \$? = $ac_status" >&5
++   echo "$as_me:10231: \$? = $ac_status" >&5
+    if (exit $ac_status) && test -s "$ac_outfile"; then
+      # The compiler can only warn and ignore the option if not recognized
+      # So say no if there are warnings other than the usual output.
+@@ -10371,11 +10563,11 @@ else
+    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+    -e 's:$: $lt_compiler_flag:'`
+-   (eval echo "\"\$as_me:10374: $lt_compile\"" >&5)
++   (eval echo "\"\$as_me:10566: $lt_compile\"" >&5)
+    (eval "$lt_compile" 2>conftest.err)
+    ac_status=$?
+    cat conftest.err >&5
+-   echo "$as_me:10378: \$? = $ac_status" >&5
++   echo "$as_me:10570: \$? = $ac_status" >&5
+    if (exit $ac_status) && test -s "$ac_outfile"; then
+      # The compiler can only warn and ignore the option if not recognized
+      # So say no if there are warnings other than the usual output.
+@@ -10476,11 +10668,11 @@ else
+    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+    -e 's:$: $lt_compiler_flag:'`
+-   (eval echo "\"\$as_me:10479: $lt_compile\"" >&5)
++   (eval echo "\"\$as_me:10671: $lt_compile\"" >&5)
+    (eval "$lt_compile" 2>out/conftest.err)
+    ac_status=$?
+    cat out/conftest.err >&5
+-   echo "$as_me:10483: \$? = $ac_status" >&5
++   echo "$as_me:10675: \$? = $ac_status" >&5
+    if (exit $ac_status) && test -s out/conftest2.$ac_objext
+    then
+      # The compiler can only warn and ignore the option if not recognized
+@@ -10531,11 +10723,11 @@ else
+    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+    -e 's:$: $lt_compiler_flag:'`
+-   (eval echo "\"\$as_me:10534: $lt_compile\"" >&5)
++   (eval echo "\"\$as_me:10726: $lt_compile\"" >&5)
+    (eval "$lt_compile" 2>out/conftest.err)
+    ac_status=$?
+    cat out/conftest.err >&5
+-   echo "$as_me:10538: \$? = $ac_status" >&5
++   echo "$as_me:10730: \$? = $ac_status" >&5
+    if (exit $ac_status) && test -s out/conftest2.$ac_objext
+    then
+      # The compiler can only warn and ignore the option if not recognized
+@@ -12915,7 +13107,7 @@ else
+   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+   lt_status=$lt_dlunknown
+   cat > conftest.$ac_ext <<_LT_EOF
+-#line 12918 "configure"
++#line 13110 "configure"
+ #include "confdefs.h"
+
+ #if HAVE_DLFCN_H
+@@ -13011,7 +13203,7 @@ else
+   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+   lt_status=$lt_dlunknown
+   cat > conftest.$ac_ext <<_LT_EOF
+-#line 13014 "configure"
++#line 13206 "configure"
+ #include "confdefs.h"
+
+ #if HAVE_DLFCN_H
+diff -rupN mpfr-3.0.0.orig/gamma.c mpfr-3.0.0/gamma.c
+--- mpfr-3.0.0.orig/gamma.c	2010-11-17 14:50:50.003037400 -0700
++++ mpfr-3.0.0/gamma.c	2010-07-09 18:11:46.000000000 -0600
+@@ -274,7 +274,7 @@ mpfr_gamma (mpfr_ptr gamma, mpfr_srcptr
+       /* we want an upper bound for x * [log(2-x)-1].
+          since x < 0, we need a lower bound on log(2-x) */
+       mpfr_ui_sub (xp, 2, x, MPFR_RNDD);
+-      mpfr_log (xp, xp, MPFR_RNDD);
++      mpfr_log2 (xp, xp, MPFR_RNDD);
+       mpfr_sub_ui (xp, xp, 1, MPFR_RNDD);
+       mpfr_mul (xp, xp, x, MPFR_RNDU);
+
+@@ -303,8 +303,8 @@ mpfr_gamma (mpfr_ptr gamma, mpfr_srcptr
+         {
+           mpfr_sub (tmp, tmp, tmp2, MPFR_RNDZ); /* low bnd on |sin(Pi*(2-x))| */
+           mpfr_ui_div (tmp, 12, tmp, MPFR_RNDU); /* upper bound */
+-          mpfr_log (tmp, tmp, MPFR_RNDU);
+-          mpfr_add (tmp, tmp, xp, MPFR_RNDU);
++          mpfr_log2 (tmp, tmp, MPFR_RNDU);
++          mpfr_add (xp, tmp, xp, MPFR_RNDU);
+           underflow = mpfr_cmp_si (xp, expo.saved_emin - 2) <= 0;
+         }
+
+diff -rupN mpfr-3.0.0.orig/mpfr.h mpfr-3.0.0/mpfr.h
+--- mpfr-3.0.0.orig/mpfr.h	2010-11-17 14:50:50.066041000 -0700
++++ mpfr-3.0.0/mpfr.h	2010-11-09 08:15:07.000000000 -0700
+@@ -27,7 +27,7 @@ http://www.gnu.org/licenses/ or write to
+ #define MPFR_VERSION_MAJOR 3
+ #define MPFR_VERSION_MINOR 0
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "3.0.0"
++#define MPFR_VERSION_STRING "3.0.0-p8"
+
+ /* Macros dealing with MPFR VERSION */
+ #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
+@@ -67,6 +67,16 @@ MPFR_VERSION_NUM(MPFR_VERSION_MAJOR,MPFR
+ # define _MPFR_H_HAVE_INTMAX_T 1
+ #endif
+
++/* Avoid some problems with macro expansion if the user defines macros
++   with the same name as keywords. By convention, identifiers and macro
++   names starting with mpfr_ are reserved by MPFR. */
++typedef void            mpfr_void;
++typedef int             mpfr_int;
++typedef unsigned int    mpfr_uint;
++typedef long            mpfr_long;
++typedef unsigned long   mpfr_ulong;
++typedef size_t          mpfr_size_t;
++
+ /* Definition of rounding modes (DON'T USE MPFR_RNDNA!).
+    Warning! Changing the contents of this enum should be seen as an
+    interface change since the old and the new types are not compatible
+@@ -136,7 +146,7 @@ typedef int          mpfr_sign_t;
+ typedef mp_exp_t     mpfr_exp_t;
+
+ /* Definition of the standard exponent limits */
+-#define MPFR_EMAX_DEFAULT ((mpfr_exp_t) (((unsigned long) 1 << 30) - 1))
++#define MPFR_EMAX_DEFAULT ((mpfr_exp_t) (((mpfr_ulong) 1 << 30) - 1))
+ #define MPFR_EMIN_DEFAULT (-(MPFR_EMAX_DEFAULT))
+
+ /* Definition of the main structure */
+@@ -725,13 +735,13 @@ __MPFR_DECLSPEC int    mpfr_custom_get_k
+    unexpected results with future compilers and aggressive optimisations.
+    Why not working only with signed types, using INT_MIN and LONG_MIN? */
+ #if __GMP_MP_SIZE_T_INT
+-#define __MPFR_EXP_NAN  ((mpfr_exp_t)((~((~(unsigned int)0)>>1))+2))
+-#define __MPFR_EXP_ZERO ((mpfr_exp_t)((~((~(unsigned int)0)>>1))+1))
+-#define __MPFR_EXP_INF  ((mpfr_exp_t)((~((~(unsigned int)0)>>1))+3))
++#define __MPFR_EXP_NAN  ((mpfr_exp_t)((~((~(mpfr_uint)0)>>1))+2))
++#define __MPFR_EXP_ZERO ((mpfr_exp_t)((~((~(mpfr_uint)0)>>1))+1))
++#define __MPFR_EXP_INF  ((mpfr_exp_t)((~((~(mpfr_uint)0)>>1))+3))
+ #else
+-#define __MPFR_EXP_NAN  ((mpfr_exp_t)((~((~(unsigned long)0)>>1))+2))
+-#define __MPFR_EXP_ZERO ((mpfr_exp_t)((~((~(unsigned long)0)>>1))+1))
+-#define __MPFR_EXP_INF  ((mpfr_exp_t)((~((~(unsigned long)0)>>1))+3))
++#define __MPFR_EXP_NAN  ((mpfr_exp_t)((~((~(mpfr_ulong)0)>>1))+2))
++#define __MPFR_EXP_ZERO ((mpfr_exp_t)((~((~(mpfr_ulong)0)>>1))+1))
++#define __MPFR_EXP_INF  ((mpfr_exp_t)((~((~(mpfr_ulong)0)>>1))+3))
+ #endif
+
+ /* Define MPFR_USE_EXTENSION to avoid "gcc -pedantic" warnings. */
+@@ -760,9 +770,9 @@ __MPFR_DECLSPEC int    mpfr_custom_get_k
+ #define mpfr_inf_p(_x)      ((_x)->_mpfr_exp == __MPFR_EXP_INF)
+ #define mpfr_zero_p(_x)     ((_x)->_mpfr_exp == __MPFR_EXP_ZERO)
+ #define mpfr_regular_p(_x)  ((_x)->_mpfr_exp >  __MPFR_EXP_INF)
+-#define mpfr_sgn(_x)                                          \
+-  ((_x)->_mpfr_exp < __MPFR_EXP_INF ?                         \
+-   (mpfr_nan_p (_x) ? mpfr_set_erangeflag () : (void) 0), 0 : \
++#define mpfr_sgn(_x)                                               \
++  ((_x)->_mpfr_exp < __MPFR_EXP_INF ?                              \
++   (mpfr_nan_p (_x) ? mpfr_set_erangeflag () : (mpfr_void) 0), 0 : \
+    MPFR_SIGN (_x))
+
+ /* Prevent them from using as lvalues */
+@@ -798,50 +808,72 @@ __MPFR_DECLSPEC int    mpfr_custom_get_k
+      anyway. Checking with other ICC versions is needed. Possibly detect
+      whether warnings are produced or not with a configure test.
+    + Remove C++ too, since it complains too much. */
++/* Added casts to improve robustness in case of undefined behavior and
++   compiler extensions based on UB (in particular -fwrapv). MPFR doesn't
++   use such extensions, but these macros will be used by 3rd-party code,
++   where such extensions may be required.
++   Moreover casts to unsigned long have been added to avoid warnings in
++   programs that use MPFR and are compiled with -Wconversion; such casts
++   are OK since if X is a constant expression, then (unsigned long) X is
++   also a constant expression, so that the optimizations still work. The
++   warnings are probably related to the following two bugs:
++     http://gcc.gnu.org/bugzilla/show_bug.cgi?id=4210
++     http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38470 (possibly a variant)
++   and the casts could be removed once these bugs are fixed.
++   Casts shouldn't be used on the generic calls (to the ..._2exp functions),
++   where implicit conversions are performed. Indeed, having at least one
++   implicit conversion in the macro allows the compiler to emit diagnostics
++   when normally expected, for instance in the following call:
++     mpfr_set_ui (x, "foo", MPFR_RNDN);
++   If this is not possible (for future macros), one of the tricks described
++   on http://groups.google.com/group/comp.std.c/msg/e92abd24bf9eaf7b could
++   be used. */
+ #if defined (__GNUC__) && !defined(__ICC) && !defined(__cplusplus)
+ #if (__GNUC__ >= 2)
+ #undef mpfr_cmp_ui
+-/* We use the fact that mpfr_sgn on NaN sets the erange flag and returns 0. */
+-#define mpfr_cmp_ui(_f,_u)                 \
+- (__builtin_constant_p (_u) && (_u) == 0 ? \
+-   mpfr_sgn (_f) :                         \
+-   mpfr_cmp_ui_2exp ((_f),(_u),0))
++/* We use the fact that mpfr_sgn on NaN sets the erange flag and returns 0.
++   But warning! mpfr_sgn is specified as a macro in the API, thus the macro
++   mustn't be used if side effects are possible, like here. */
++#define mpfr_cmp_ui(_f,_u)                                      \
++  (__builtin_constant_p (_u) && (mpfr_ulong) (_u) == 0 ?        \
++   (mpfr_sgn) (_f) :                                            \
++   mpfr_cmp_ui_2exp ((_f), (_u), 0))
+ #undef mpfr_cmp_si
+-#define mpfr_cmp_si(_f,_s)                 \
+- (__builtin_constant_p (_s) && (_s) >= 0 ? \
+-   mpfr_cmp_ui ((_f), (_s)) :              \
++#define mpfr_cmp_si(_f,_s)                                      \
++  (__builtin_constant_p (_s) && (mpfr_long) (_s) >= 0 ?         \
++   mpfr_cmp_ui ((_f), (mpfr_ulong) (mpfr_long) (_s)) :          \
+    mpfr_cmp_si_2exp ((_f), (_s), 0))
+ #if __GNUC__ > 2 || __GNUC_MINOR__ >= 95
+ #undef mpfr_set_ui
+-#define mpfr_set_ui(_f,_u,_r)              \
+- (__builtin_constant_p (_u) && (_u) == 0 ? \
+-   __extension__ ({                        \
+-     mpfr_ptr _p = (_f);                   \
+-     _p->_mpfr_sign = 1;                   \
+-     _p->_mpfr_exp = __MPFR_EXP_ZERO;      \
+-     (void) (_r); 0; }) :                  \
++#define mpfr_set_ui(_f,_u,_r)                                   \
++  (__builtin_constant_p (_u) && (mpfr_ulong) (_u) == 0 ?        \
++   __extension__ ({                                             \
++       mpfr_ptr _p = (_f);                                      \
++       _p->_mpfr_sign = 1;                                      \
++       _p->_mpfr_exp = __MPFR_EXP_ZERO;                         \
++       (mpfr_void) (_r); 0; }) :                                \
+    mpfr_set_ui_2exp ((_f), (_u), 0, (_r)))
+ #endif
+ #undef mpfr_set_si
+-#define mpfr_set_si(_f,_s,_r)              \
+- (__builtin_constant_p (_s) && (_s) >= 0 ? \
+-   mpfr_set_ui ((_f), (_s), (_r)) :        \
++#define mpfr_set_si(_f,_s,_r)                                   \
++  (__builtin_constant_p (_s) && (mpfr_long) (_s) >= 0 ?         \
++   mpfr_set_ui ((_f), (mpfr_ulong) (mpfr_long) (_s), (_r)) :    \
+    mpfr_set_si_2exp ((_f), (_s), 0, (_r)))
+ #endif
+ #endif
+
+ /* Macro version of mpfr_stack interface for fast access */
+-#define mpfr_custom_get_size(p) ((size_t)                            \
++#define mpfr_custom_get_size(p) ((mpfr_size_t)                          \
+        (((p)+GMP_NUMB_BITS-1)/GMP_NUMB_BITS*sizeof (mp_limb_t)))
+ #define mpfr_custom_init(m,p) do {} while (0)
+-#define mpfr_custom_get_significand(x) ((void*)((x)->_mpfr_d))
++#define mpfr_custom_get_significand(x) ((mpfr_void*)((x)->_mpfr_d))
+ #define mpfr_custom_get_exp(x) ((x)->_mpfr_exp)
+ #define mpfr_custom_move(x,m) do { ((x)->_mpfr_d = (mp_limb_t*)(m)); } while (0)
+ #define mpfr_custom_init_set(x,k,e,p,m) do {                   \
+   mpfr_ptr _x = (x);                                           \
+   mpfr_exp_t _e;                                               \
+   mpfr_kind_t _t;                                              \
+-  int _s, _k;                                                  \
++  mpfr_int _s, _k;                                             \
+   _k = (k);                                                    \
+   if (_k >= 0)  {                                              \
+     _t = (mpfr_kind_t) _k;                                     \
+@@ -858,11 +890,13 @@ __MPFR_DECLSPEC int    mpfr_custom_get_k
+   _x->_mpfr_exp  = _e;                                         \
+   _x->_mpfr_d    = (mp_limb_t*) (m);                           \
+  } while (0)
+-#define mpfr_custom_get_kind(x)                                              \
+-  ( (x)->_mpfr_exp >  __MPFR_EXP_INF ? (int)MPFR_REGULAR_KIND*MPFR_SIGN (x) \
+-  : (x)->_mpfr_exp == __MPFR_EXP_INF ? (int)MPFR_INF_KIND*MPFR_SIGN (x)     \
+-  : (x)->_mpfr_exp == __MPFR_EXP_NAN ? (int)MPFR_NAN_KIND                   \
+-  : (int) MPFR_ZERO_KIND * MPFR_SIGN (x) )
++#define mpfr_custom_get_kind(x)                                         \
++  ( (x)->_mpfr_exp >  __MPFR_EXP_INF ?                                  \
++    (mpfr_int) MPFR_REGULAR_KIND * MPFR_SIGN (x)                        \
++  : (x)->_mpfr_exp == __MPFR_EXP_INF ?                                  \
++    (mpfr_int) MPFR_INF_KIND * MPFR_SIGN (x)                            \
++  : (x)->_mpfr_exp == __MPFR_EXP_NAN ? (mpfr_int) MPFR_NAN_KIND         \
++  : (mpfr_int) MPFR_ZERO_KIND * MPFR_SIGN (x) )
+
+
+ #endif /* MPFR_USE_NO_MACRO */
+diff -rupN mpfr-3.0.0.orig/mpfr.texi mpfr-3.0.0/mpfr.texi
+--- mpfr-3.0.0.orig/mpfr.texi	2010-11-17 14:50:50.069041200 -0700
++++ mpfr-3.0.0/mpfr.texi	2010-06-23 05:03:12.000000000 -0600
+@@ -2050,7 +2050,7 @@ first digit and a trailing exponent in b
+ are printed. If @var{base} is greater than 10, @samp{@@} will be used
+ instead of @samp{e} as exponent delimiter.
+
+-Return the number of bytes written, or if an error occurred, return 0.
++Return the number of characters written, or if an error occurred, return 0.
+ @end deftypefun
+
+ @deftypefun size_t mpfr_inp_str (mpfr_t @var{rop}, FILE *@var{stream}, int @var{base}, mpfr_rnd_t @var{rnd})
+diff -rupN mpfr-3.0.0.orig/out_str.c mpfr-3.0.0/out_str.c
+--- mpfr-3.0.0.orig/out_str.c	2010-11-17 14:50:50.080041800 -0700
++++ mpfr-3.0.0/out_str.c	2010-06-23 05:03:12.000000000 -0600
+@@ -22,6 +22,16 @@ http://www.gnu.org/licenses/ or write to
+
+ #include "mpfr-impl.h"
+
++/* Warning! S should not contain "%". */
++#define OUT_STR_RET(S)                          \
++  do                                            \
++    {                                           \
++      int r;                                    \
++      r = fprintf (stream, (S));                \
++      return r < 0 ? 0 : r;                     \
++    }                                           \
++  while (0)
++
+ size_t
+ mpfr_out_str (FILE *stream, int base, size_t n_digits, mpfr_srcptr op,
+               mpfr_rnd_t rnd_mode)
+@@ -29,6 +39,7 @@ mpfr_out_str (FILE *stream, int base, si
+   char *s, *s0;
+   size_t l;
+   mpfr_exp_t e;
++  int err;
+
+   MPFR_ASSERTN (base >= 2 && base <= 62);
+
+@@ -36,37 +47,16 @@ mpfr_out_str (FILE *stream, int base, si
+   if (stream == NULL)
+     stream = stdout;
+
+-  if (MPFR_IS_NAN(op))
+-    {
+-      fprintf (stream, "@NaN@");
+-      return 3;
+-    }
+-
+-  if (MPFR_IS_INF(op))
+-    {
+-      if (MPFR_SIGN(op) > 0)
+-        {
+-          fprintf (stream, "@Inf@");
+-          return 3;
+-        }
+-      else
+-        {
+-          fprintf (stream, "-@Inf@");
+-          return 4;
+-        }
+-    }
+-
+-  if (MPFR_IS_ZERO(op))
++  if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (op)))
+     {
+-      if (MPFR_SIGN(op) > 0)
+-        {
+-          fprintf(stream, "0");
+-          return 1;
+-        }
++      if (MPFR_IS_NAN (op))
++        OUT_STR_RET ("@NaN@");
++      else if (MPFR_IS_INF (op))
++        OUT_STR_RET (MPFR_IS_POS (op) ? "@Inf@" : "-@Inf@");
+       else
+         {
+-          fprintf(stream, "-0");
+-          return 2;
++          MPFR_ASSERTD (MPFR_IS_ZERO (op));
++          OUT_STR_RET (MPFR_IS_POS (op) ? "0" : "-0");
+         }
+     }
+
+@@ -77,21 +67,31 @@ mpfr_out_str (FILE *stream, int base, si
+
+   l = strlen (s) + 1; /* size of allocated block returned by mpfr_get_str
+                          - may be incorrect, as only an upper bound? */
+-  if (*s == '-')
+-    fputc (*s++, stream);
+
+-  /* outputs mantissa */
+-  fputc (*s++, stream); e--; /* leading digit */
+-  fputc ((unsigned char) MPFR_DECIMAL_POINT, stream);
+-  fputs (s, stream);         /* rest of mantissa */
++  /* outputs possible sign and significand */
++  err = (*s == '-' && fputc (*s++, stream) == EOF)
++    || fputc (*s++, stream) == EOF  /* leading digit */
++    || fputc ((unsigned char) MPFR_DECIMAL_POINT, stream) == EOF
++    || fputs (s, stream) == EOF;     /* trailing significand */
+   (*__gmp_free_func) (s0, l);
++  if (MPFR_UNLIKELY (err))
++    return 0;
++
++  e--;  /* due to the leading digit */
+
+   /* outputs exponent */
+   if (e)
+     {
++      int r;
++
+       MPFR_ASSERTN(e >= LONG_MIN);
+       MPFR_ASSERTN(e <= LONG_MAX);
+-      l += fprintf (stream, (base <= 10 ? "e%ld" : "@%ld"), (long) e);
++
++      r = fprintf (stream, (base <= 10 ? "e%ld" : "@%ld"), (long) e);
++      if (MPFR_UNLIKELY (r < 0))
++        return 0;
++
++      l += r;
+     }
+
+   return l;
+diff -rupN mpfr-3.0.0.orig/set_ld.c mpfr-3.0.0/set_ld.c
+--- mpfr-3.0.0.orig/set_ld.c	2010-11-17 14:50:50.224050100 -0700
++++ mpfr-3.0.0/set_ld.c	2010-10-21 15:18:26.000000000 -0600
+@@ -102,21 +102,25 @@ mpfr_set_ld (mpfr_ptr r, long double d,
+             {
+               x /= div13; /* exact */
+               shift_exp += 8192;
++              mpfr_div_2si (t, t, 8192, MPFR_RNDZ);
+             }
+           if (ABS (x) >= div12)
+             {
+               x /= div12; /* exact */
+               shift_exp += 4096;
++              mpfr_div_2si (t, t, 4096, MPFR_RNDZ);
+             }
+           if (ABS (x) >= div11)
+             {
+               x /= div11; /* exact */
+               shift_exp += 2048;
++              mpfr_div_2si (t, t, 2048, MPFR_RNDZ);
+             }
+           if (ABS (x) >= div10)
+             {
+               x /= div10; /* exact */
+               shift_exp += 1024;
++              mpfr_div_2si (t, t, 1024, MPFR_RNDZ);
+             }
+           /* warning: we may have DBL_MAX=2^1024*(1-2^(-53)) < x < 2^1024,
+              therefore we have one extra exponent reduction step */
+@@ -124,9 +128,10 @@ mpfr_set_ld (mpfr_ptr r, long double d,
+             {
+               x /= div9; /* exact */
+               shift_exp += 512;
++              mpfr_div_2si (t, t, 512, MPFR_RNDZ);
+             }
+         } /* Check overflow of double */
+-      else
++      else /* no overflow on double */
+         {
+           long double div9, div10, div11;
+
+@@ -149,29 +154,34 @@ mpfr_set_ld (mpfr_ptr r, long double d,
+                 {
+                   x /= div13; /* exact */
+                   shift_exp -= 8192;
++                  mpfr_mul_2si (t, t, 8192, MPFR_RNDZ);
+                 }
+               if (ABS (x) <= div12)
+                 {
+                   x /= div12; /* exact */
+                   shift_exp -= 4096;
++                  mpfr_mul_2si (t, t, 4096, MPFR_RNDZ);
+                 }
+               if (ABS (x) <= div11)
+                 {
+                   x /= div11; /* exact */
+                   shift_exp -= 2048;
++                  mpfr_mul_2si (t, t, 2048, MPFR_RNDZ);
+                 }
+               if (ABS (x) <= div10)
+                 {
+                   x /= div10; /* exact */
+                   shift_exp -= 1024;
++                  mpfr_mul_2si (t, t, 1024, MPFR_RNDZ);
+                 }
+               if (ABS(x) <= div9)
+                 {
+                   x /= div9;  /* exact */
+                   shift_exp -= 512;
++                  mpfr_mul_2si (t, t, 512, MPFR_RNDZ);
+                 }
+             }
+-          else
++          else /* no underflow */
+             {
+               inexact = mpfr_set_d (u, (double) x, MPFR_RNDZ);
+               MPFR_ASSERTD (inexact == 0);
+diff -rupN mpfr-3.0.0.orig/sub1.c mpfr-3.0.0/sub1.c
+--- mpfr-3.0.0.orig/sub1.c	2010-11-17 14:50:50.254051800 -0700
++++ mpfr-3.0.0/sub1.c	2010-10-21 14:59:32.000000000 -0600
+@@ -37,7 +37,9 @@ mpfr_sub1 (mpfr_ptr a, mpfr_srcptr b, mp
+   mp_size_t cancel2, an, bn, cn, cn0;
+   mp_limb_t *ap, *bp, *cp;
+   mp_limb_t carry, bb, cc, borrow = 0;
+-  int inexact, shift_b, shift_c, is_exact = 1, down = 0, add_exp = 0;
++  int inexact, shift_b, shift_c, add_exp = 0;
++  int cmp_low = 0; /* used for rounding to nearest: 0 if low(b) = low(c),
++                      negative if low(b) < low(c), positive if low(b)>low(c) */
+   int sh, k;
+   MPFR_TMP_DECL(marker);
+
+@@ -196,7 +198,8 @@ mpfr_sub1 (mpfr_ptr a, mpfr_srcptr b, mp
+     }
+
+ #ifdef DEBUG
+-  printf ("shift_b=%d shift_c=%d diffexp=%lu\n", shift_b, shift_c,
++  printf ("rnd=%s shift_b=%d shift_c=%d diffexp=%lu\n",
++          mpfr_print_rnd_mode (rnd_mode), shift_b, shift_c,
+           (unsigned long) diff_exp);
+ #endif
+
+@@ -307,17 +310,18 @@ mpfr_sub1 (mpfr_ptr a, mpfr_srcptr b, mp
+     {
+       if (MPFR_LIKELY(sh))
+         {
+-          is_exact = (carry == 0);
+           /* can decide except when carry = 2^(sh-1) [middle]
+              or carry = 0 [truncate, but cannot decide inexact flag] */
+-          down = (carry < (MPFR_LIMB_ONE << (sh - 1)));
+           if (carry > (MPFR_LIMB_ONE << (sh - 1)))
+             goto add_one_ulp;
+-          else if ((0 < carry) && down)
++          else if ((0 < carry) && (carry < (MPFR_LIMB_ONE << (sh - 1))))
+             {
+               inexact = -1; /* result if smaller than exact value */
+               goto truncate;
+             }
++          /* now carry = 2^(sh-1), in which case cmp_low=2,
++             or carry = 0, in which case cmp_low=0 */
++          cmp_low = (carry == 0) ? 0 : 2;
+         }
+     }
+   else /* directed rounding: set rnd_mode to RNDZ iff toward zero */
+@@ -344,12 +348,32 @@ mpfr_sub1 (mpfr_ptr a, mpfr_srcptr b, mp
+   cn -= (long int) an + cancel2;
+
+ #ifdef DEBUG
+-  printf ("last %d bits from a are %lu, bn=%ld, cn=%ld\n",
++  printf ("last sh=%d bits from a are %lu, bn=%ld, cn=%ld\n",
+           sh, (unsigned long) carry, (long) bn, (long) cn);
+ #endif
+
++  /* for rounding to nearest, we couldn't conclude up to here in the following
++     cases:
++     1. sh = 0, then cmp_low=0: we can either truncate, subtract one ulp
++        or add one ulp: -1 ulp < low(b)-low(c) < 1 ulp
++     2. sh > 0 but the low sh bits from high(b)-high(c) equal 2^(sh-1):
++        -0.5 ulp <= -1/2^sh < low(b)-low(c)-0.5 < 1/2^sh <= 0.5 ulp
++        we can't decide the rounding, in that case cmp_low=2:
++        either we truncate and flag=-1, or we add one ulp and flag=1
++     3. the low sh>0 bits from high(b)-high(c) equal 0: we know we have to
++        truncate but we can't decide the ternary value, here cmp_low=0:
++        -0.5 ulp <= -1/2^sh < low(b)-low(c) < 1/2^sh <= 0.5 ulp
++        we always truncate and inexact can be any of -1,0,1
++  */
++
++  /* note: here cn might exceed cn0, in which case we consider a zero limb */
+   for (k = 0; (bn > 0) || (cn > 0); k = 1)
+     {
++      /* if cmp_low < 0, we know low(b) - low(c) < 0
++         if cmp_low > 0, we know low(b) - low(c) > 0
++            (more precisely if cmp_low = 2, low(b) - low(c) = 0.5 ulp so far)
++         if cmp_low = 0, so far low(b) - low(c) = 0 */
++
+       /* get next limbs */
+       bb = (bn > 0) ? bp[--bn] : 0;
+       if ((cn > 0) && (cn-- <= cn0))
+@@ -357,76 +381,115 @@ mpfr_sub1 (mpfr_ptr a, mpfr_srcptr b, mp
+       else
+         cc = 0;
+
+-      /* down is set when low(b) < low(c) */
+-      if (down == 0)
+-        down = (bb < cc);
++      /* cmp_low compares low(b) and low(c) */
++      if (cmp_low == 0) /* case 1 or 3 */
++        cmp_low = (bb < cc) ? -2+k : (bb > cc) ? 1 : 0;
++
++      /* Case 1 for k=0 splits into 7 subcases:
++         1a: bb > cc + half
++         1b: bb = cc + half
++         1c: 0 < bb - cc < half
++         1d: bb = cc
++         1e: -half < bb - cc < 0
++         1f: bb - cc = -half
++         1g: bb - cc < -half
++
++         Case 2 splits into 3 subcases:
++         2a: bb > cc
++         2b: bb = cc
++         2c: bb < cc
++
++         Case 3 splits into 3 subcases:
++         3a: bb > cc
++         3b: bb = cc
++         3c: bb < cc
++      */
+
+       /* the case rounding to nearest with sh=0 is special since one couldn't
+          subtract above 1/2 ulp in the trailing limb of the result */
+-      if ((rnd_mode == MPFR_RNDN) && sh == 0 && k == 0)
++      if (rnd_mode == MPFR_RNDN && sh == 0 && k == 0) /* case 1 for k=0 */
+         {
+           mp_limb_t half = MPFR_LIMB_HIGHBIT;
+
+-          is_exact = (bb == cc);
+-
+           /* add one ulp if bb > cc + half
+              truncate if cc - half < bb < cc + half
+              sub one ulp if bb < cc - half
+           */
+
+-          if (down)
++          if (cmp_low < 0) /* bb < cc: -1 ulp < low(b) - low(c) < 0,
++                              cases 1e, 1f and 1g */
+             {
+               if (cc >= half)
+                 cc -= half;
+-              else
++              else /* since bb < cc < half, bb+half < 2*half */
+                 bb += half;
++              /* now we have bb < cc + half:
++                 we have to subtract one ulp if bb < cc,
++                 and truncate if bb > cc */
+             }
+-          else /* bb >= cc */
++          else if (cmp_low >= 0) /* bb >= cc, cases 1a to 1d */
+             {
+               if (cc < half)
+                 cc += half;
+-              else
++              else /* since bb >= cc >= half, bb - half >= 0 */
+                 bb -= half;
++              /* now we have bb > cc - half: we have to add one ulp if bb > cc,
++                 and truncate if bb < cc */
++              if (cmp_low > 0)
++                cmp_low = 2;
+             }
+         }
+
+ #ifdef DEBUG
+-      printf ("    bb=%lu cc=%lu down=%d is_exact=%d\n",
+-              (unsigned long) bb, (unsigned long) cc, down, is_exact);
++      printf ("k=%u bb=%lu cc=%lu cmp_low=%d\n", k,
++              (unsigned long) bb, (unsigned long) cc, cmp_low);
+ #endif
+-      if (bb < cc)
++      if (cmp_low < 0) /* low(b) - low(c) < 0: either truncate or subtract
++                          one ulp */
+         {
+           if (rnd_mode == MPFR_RNDZ)
+-            goto sub_one_ulp;
++            goto sub_one_ulp; /* set inexact=-1 */
+           else if (rnd_mode != MPFR_RNDN) /* round away */
+             {
+               inexact = 1;
+               goto truncate;
+             }
+-          else /* round to nearest: special case here since for sh=k=0
+-                  bb = bb0 - MPFR_LIMB_HIGHBIT */
++          else /* round to nearest */
+             {
+-              if (is_exact && sh == 0)
+-                {
+-                  /* For k=0 we can't decide exactness since it may depend
+-                     from low order bits.
+-                     For k=1, the first low limbs matched: low(b)-low(c)<0. */
+-                  if (k)
+-                    {
+-                      inexact = 1;
+-                      goto truncate;
+-                    }
+-                }
+-              else if (down && sh == 0)
+-                goto sub_one_ulp;
+-              else
+-                {
+-                  inexact = (is_exact) ? 1 : -1;
++              /* If cmp_low < 0 and bb > cc, then -0.5 ulp < low(b)-low(c) < 0,
++                 whatever the value of sh.
++                 If sh>0, then cmp_low < 0 implies that the initial neglected
++                 sh bits were 0 (otherwise cmp_low=2 initially), thus the
++                 weight of the new bits is less than 0.5 ulp too.
++                 If k > 0 (and sh=0) this means that either the first neglected
++                 limbs bb and cc were equal (thus cmp_low was 0 for k=0),
++                 or we had bb - cc = -0.5 ulp or 0.5 ulp.
++                 The last case is not possible here since we would have
++                 cmp_low > 0 which is sticky.
++                 In the first case (where we have cmp_low = -1), we truncate,
++                 whereas in the 2nd case we have cmp_low = -2 and we subtract
++                 one ulp.
++              */
++              if (bb > cc || sh > 0 || cmp_low == -1)
++                {  /* -0.5 ulp < low(b)-low(c) < 0,
++                      bb > cc corresponds to cases 1e and 1f1
++                      sh > 0 corresponds to cases 3c and 3b3
++                      cmp_low = -1 corresponds to case 1d3 (also 3b3) */
++                  inexact = 1;
+                   goto truncate;
+                 }
++              else if (bb < cc) /* here sh = 0 and low(b)-low(c) < -0.5 ulp,
++                                   this corresponds to cases 1g and 1f3 */
++                goto sub_one_ulp;
++              /* the only case where we can't conclude is sh=0 and bb=cc,
++                 i.e., we have low(b) - low(c) = -0.5 ulp (up to now), thus
++                 we don't know if we must truncate or subtract one ulp.
++                 Note: for sh=0 we can't have low(b) - low(c) = -0.5 ulp up to
++                 now, since low(b) - low(c) > 1/2^sh */
+             }
+         }
+-      else if (bb > cc)
++      else if (cmp_low > 0) /* 0 < low(b) - low(c): either truncate or
++                               add one ulp */
+         {
+           if (rnd_mode == MPFR_RNDZ)
+             {
+@@ -437,34 +500,70 @@ mpfr_sub1 (mpfr_ptr a, mpfr_srcptr b, mp
+             goto add_one_ulp;
+           else /* round to nearest */
+             {
+-              if (is_exact)
++              if (bb > cc)
+                 {
+-                  inexact = -1;
+-                  goto truncate;
++                  /* if sh=0, then bb>cc means that low(b)-low(c) > 0.5 ulp,
++                     and similarly when cmp_low=2 */
++                  if (cmp_low == 2) /* cases 1a, 1b1, 2a and 2b1 */
++                    goto add_one_ulp;
++                  /* sh > 0 and cmp_low > 0: this implies that the sh initial
++                     neglected bits were 0, and the remaining low(b)-low(c)>0,
++                     but its weight is less than 0.5 ulp */
++                  else /* 0 < low(b) - low(c) < 0.5 ulp, this corresponds to
++                          cases 3a, 1d1 and 3b1 */
++                    {
++                      inexact = -1;
++                      goto truncate;
++                    }
+                 }
+-              else if (down)
++              else if (bb < cc) /* 0 < low(b) - low(c) < 0.5 ulp, cases 1c,
++                                   1b3, 2b3 and 2c */
+                 {
+-                  inexact = 1;
++                  inexact = -1;
+                   goto truncate;
+                 }
+-              else
+-                goto add_one_ulp;
+-            }
+-        }
++              /* the only case where we can't conclude is bb=cc, i.e.,
++                 low(b) - low(c) = 0.5 ulp (up to now), thus we don't know
++                 if we must truncate or add one ulp. */
++            }
++        }
++      /* after k=0, we cannot conclude in the following cases, we split them
++         according to the values of bb and cc for k=1:
++         1b. sh=0 and cmp_low = 1 and bb-cc = half [around 0.5 ulp]
++             1b1. bb > cc: add one ulp, inex = 1
++             1b2: bb = cc: cannot conclude
++             1b3: bb < cc: truncate, inex = -1
++         1d. sh=0 and cmp_low = 0 and bb-cc = 0 [around 0]
++             1d1: bb > cc: truncate, inex = -1
++             1d2: bb = cc: cannot conclude
++             1d3: bb < cc: truncate, inex = +1
++         1f. sh=0 and cmp_low = -1 and bb-cc = -half [around -0.5 ulp]
++             1f1: bb > cc: truncate, inex = +1
++             1f2: bb = cc: cannot conclude
++             1f3: bb < cc: sub one ulp, inex = -1
++         2b. sh > 0 and cmp_low = 2 and bb=cc [around 0.5 ulp]
++             2b1. bb > cc: add one ulp, inex = 1
++             2b2: bb = cc: cannot conclude
++             2b3: bb < cc: truncate, inex = -1
++         3b. sh > 0 and cmp_low = 0 [around 0]
++             3b1. bb > cc: truncate, inex = -1
++             3b2: bb = cc: cannot conclude
++             3b3: bb < cc: truncate, inex = +1
++      */
+     }
+
+-  if ((rnd_mode == MPFR_RNDN) && !is_exact)
++  if ((rnd_mode == MPFR_RNDN) && cmp_low != 0)
+     {
+       /* even rounding rule */
+       if ((ap[0] >> sh) & 1)
+         {
+-          if (down)
++          if (cmp_low < 0)
+             goto sub_one_ulp;
+           else
+             goto add_one_ulp;
+         }
+       else
+-        inexact = (down) ? 1 : -1;
++        inexact = (cmp_low > 0) ? -1 : 1;
+     }
+   else
+     inexact = 0;
+diff -rupN mpfr-3.0.0.orig/tests/Makefile.in mpfr-3.0.0/tests/Makefile.in
+--- mpfr-3.0.0.orig/tests/Makefile.in	2010-11-17 14:50:50.267052500 -0700
++++ mpfr-3.0.0/tests/Makefile.in	2010-06-10 05:00:52.000000000 -0600
+@@ -960,6 +960,7 @@ am__tty_colors = \
+ red=; grn=; lgn=; blu=; std=
+ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ ACLOCAL = @ACLOCAL@
++ALLOCA = @ALLOCA@
+ AMTAR = @AMTAR@
+ AR = @AR@
+ AS = @AS@
+diff -rupN mpfr-3.0.0.orig/tests/tcan_round.c mpfr-3.0.0/tests/tcan_round.c
+--- mpfr-3.0.0.orig/tests/tcan_round.c	2010-11-17 14:50:50.414058700 -0700
++++ mpfr-3.0.0/tests/tcan_round.c	2010-10-21 14:28:38.000000000 -0600
+@@ -41,7 +41,7 @@ check_round_p (void)
+       /* avoid mpn_random which leaks memory */
+       for (i = 0; i < n; i++)
+         buf[i] = randlimb ();
+-      p = (mpfr_prec_t) randlimb() % ((n-1) * GMP_NUMB_BITS) + MPFR_PREC_MIN;
++      p = randlimb() % ((n-1) * GMP_NUMB_BITS) + MPFR_PREC_MIN;
+       err = p + randlimb () % GMP_NUMB_BITS;
+       r1 = mpfr_round_p (buf, n, err, p);
+       r2 = mpfr_can_round_raw (buf, n, MPFR_SIGN_POS, err,
+diff -rupN mpfr-3.0.0.orig/tests/tcmp_ui.c mpfr-3.0.0/tests/tcmp_ui.c
+--- mpfr-3.0.0.orig/tests/tcmp_ui.c	2010-11-17 14:50:50.421059100 -0700
++++ mpfr-3.0.0/tests/tcmp_ui.c	2010-09-07 02:45:12.000000000 -0600
+@@ -88,6 +88,126 @@ check_nan (void)
+   mpfr_clear (x);
+ }
+
++/* Since mpfr_cmp_ui and mpfr_cmp_si are also implemented by a macro
++   with __builtin_constant_p for GCC, check that side effects are
++   handled correctly. */
++static void
++check_macros (void)
++{
++  mpfr_t x;
++  int c;
++
++  mpfr_init2 (x, 32);
++
++  c = 0;
++  mpfr_set_ui (x, 17, MPFR_RNDN);
++  if (mpfr_cmp_ui (x, 17) != 0)
++    {
++      printf ("Error 1 on mpfr_cmp_ui(x,17) in check_macros\n");
++      exit (1);
++    }
++  if (mpfr_cmp_ui (x, (c++, 17)) != 0)
++    {
++      printf ("Error 2 on mpfr_cmp_ui(x,17) in check_macros\n");
++      exit (1);
++    }
++  if (c != 1)
++    {
++      printf ("Error 3 on mpfr_cmp_ui(x,17) in check_macros\n"
++              "(c = %d instead of 1)\n", c);
++      exit (1);
++    }
++  if (mpfr_cmp_si (x, 17) != 0)
++    {
++      printf ("Error 1 on mpfr_cmp_si(x,17) in check_macros\n");
++      exit (1);
++    }
++  if (mpfr_cmp_si (x, (c++, 17)) != 0)
++    {
++      printf ("Error 2 on mpfr_cmp_si(x,17) in check_macros\n");
++      exit (1);
++    }
++  if (c != 2)
++    {
++      printf ("Error 3 on mpfr_cmp_si(x,17) in check_macros\n"
++              "(c = %d instead of 2)\n", c);
++      exit (1);
++    }
++
++  c = 0;
++  mpfr_set_ui (x, 0, MPFR_RNDN);
++  if (mpfr_cmp_ui (x, 0) != 0)
++    {
++      printf ("Error 1 on mpfr_cmp_ui(x,0) in check_macros\n");
++      exit (1);
++    }
++  if (mpfr_cmp_ui (x, (c++, 0)) != 0)
++    {
++      printf ("Error 2 on mpfr_cmp_ui(x,0) in check_macros\n");
++      exit (1);
++    }
++  if (c != 1)
++    {
++      printf ("Error 3 on mpfr_cmp_ui(x,0) in check_macros\n"
++              "(c = %d instead of 1)\n", c);
++      exit (1);
++    }
++  if (mpfr_cmp_si (x, 0) != 0)
++    {
++      printf ("Error 1 on mpfr_cmp_si(x,0) in check_macros\n");
++      exit (1);
++    }
++  if (mpfr_cmp_si (x, (c++, 0)) != 0)
++    {
++      printf ("Error 2 on mpfr_cmp_si(x,0) in check_macros\n");
++      exit (1);
++    }
++  if (c != 2)
++    {
++      printf ("Error 3 on mpfr_cmp_si(x,0) in check_macros\n"
++              "(c = %d instead of 2)\n", c);
++      exit (1);
++    }
++
++  mpfr_clear (x);
++}
++
++/* Bug in r7114 */
++static void
++test_macros (void)
++{
++  mpfr_t x[3];
++  mpfr_ptr p;
++
++  mpfr_inits (x[0], x[1], x[2], (mpfr_ptr) 0);
++  mpfr_set_ui (x[0], 0, MPFR_RNDN);
++  p = x[0];
++  if (mpfr_cmp_ui (p++, 0) != 0)
++    {
++      printf ("Error in mpfr_cmp_ui macro: result should be 0.\n");
++      exit (1);
++    }
++  if (p != x[1])
++    {
++      printf ("Error in mpfr_cmp_ui macro: p - x[0] = %d (expecting 1)\n",
++              (int) (p - x[0]));
++      exit (1);
++    }
++  p = x[0];
++  if (mpfr_cmp_si (p++, 0) != 0)
++    {
++      printf ("Error in mpfr_cmp_si macro: result should be 0.\n");
++      exit (1);
++    }
++  if (p != x[1])
++    {
++      printf ("Error in mpfr_cmp_si macro: p - x[0] = %d (expecting 1)\n",
++              (int) (p - x[0]));
++      exit (1);
++    }
++  mpfr_clears (x[0], x[1], x[2], (mpfr_ptr) 0);
++}
++
+ int
+ main (void)
+ {
+@@ -216,6 +336,8 @@ main (void)
+   mpfr_clear (x);
+
+   check_nan ();
++  check_macros ();
++  test_macros ();
+
+   tests_end_mpfr ();
+   return 0;
+diff -rupN mpfr-3.0.0.orig/tests/tfma.c mpfr-3.0.0/tests/tfma.c
+--- mpfr-3.0.0.orig/tests/tfma.c	2010-11-17 14:50:50.701075100 -0700
++++ mpfr-3.0.0/tests/tfma.c	2010-10-21 14:59:32.000000000 -0600
+@@ -337,6 +337,94 @@ test_underflow2 (void)
+   mpfr_clears (x, y, z, r, (mpfr_ptr) 0);
+ }
+
++static void
++bug20101018 (void)
++{
++  mpfr_t x, y, z, t, u;
++  int i;
++
++  mpfr_init2 (x, 64);
++  mpfr_init2 (y, 64);
++  mpfr_init2 (z, 64);
++  mpfr_init2 (t, 64);
++  mpfr_init2 (u, 64);
++
++  mpfr_set_str (x, "0xf.fffffffffffffffp-14766", 16, MPFR_RNDN);
++  mpfr_set_str (y, "-0xf.fffffffffffffffp+317", 16, MPFR_RNDN);
++  mpfr_set_str (z, "0x8.3ffffffffffe3ffp-14443", 16, MPFR_RNDN);
++  mpfr_set_str (t, "0x8.7ffffffffffc7ffp-14444", 16, MPFR_RNDN);
++  i = mpfr_fma (u, x, y, z, MPFR_RNDN);
++  if (mpfr_cmp (u, t) != 0)
++    {
++      printf ("Wrong result in bug20101018 (a)\n");
++      printf ("Expected ");
++      mpfr_out_str (stdout, 16, 0, t, MPFR_RNDN);
++      printf ("\nGot      ");
++      mpfr_out_str (stdout, 16, 0, u, MPFR_RNDN);
++      printf ("\n");
++      exit (1);
++    }
++  if (i <= 0)
++    {
++      printf ("Wrong ternary value in bug20101018 (a)\n");
++      printf ("Expected > 0\n");
++      printf ("Got      %d\n", i);
++      exit (1);
++    }
++
++  mpfr_set_str (x, "-0xf.fffffffffffffffp-11420", 16, MPFR_RNDN);
++  mpfr_set_str (y, "0xf.fffffffffffffffp+9863", 16, MPFR_RNDN);
++  mpfr_set_str (z, "0x8.fffff80ffffffffp-1551", 16, MPFR_RNDN);
++  mpfr_set_str (t, "0x9.fffff01ffffffffp-1552", 16, MPFR_RNDN);
++  i = mpfr_fma (u, x, y, z, MPFR_RNDN);
++  if (mpfr_cmp (u, t) != 0)
++    {
++      printf ("Wrong result in bug20101018 (b)\n");
++      printf ("Expected ");
++      mpfr_out_str (stdout, 16, 0, t, MPFR_RNDN);
++      printf ("\nGot      ");
++      mpfr_out_str (stdout, 16, 0, u, MPFR_RNDN);
++      printf ("\n");
++      exit (1);
++    }
++  if (i <= 0)
++    {
++      printf ("Wrong ternary value in bug20101018 (b)\n");
++      printf ("Expected > 0\n");
++      printf ("Got      %d\n", i);
++      exit (1);
++    }
++
++  mpfr_set_str (x, "0xf.fffffffffffffffp-2125", 16, MPFR_RNDN);
++  mpfr_set_str (y, "-0xf.fffffffffffffffp-6000", 16, MPFR_RNDN);
++  mpfr_set_str (z, "0x8p-8119", 16, MPFR_RNDN);
++  mpfr_set_str (t, "0x8.000000000000001p-8120", 16, MPFR_RNDN);
++  i = mpfr_fma (u, x, y, z, MPFR_RNDN);
++  if (mpfr_cmp (u, t) != 0)
++    {
++      printf ("Wrong result in bug20101018 (c)\n");
++      printf ("Expected ");
++      mpfr_out_str (stdout, 16, 0, t, MPFR_RNDN);
++      printf ("\nGot      ");
++      mpfr_out_str (stdout, 16, 0, u, MPFR_RNDN);
++      printf ("\n");
++      exit (1);
++    }
++  if (i <= 0)
++    {
++      printf ("Wrong ternary value in bug20101018 (c)\n");
++      printf ("Expected > 0\n");
++      printf ("Got      %d\n", i);
++      exit (1);
++    }
++
++  mpfr_clear (x);
++  mpfr_clear (y);
++  mpfr_clear (z);
++  mpfr_clear (t);
++  mpfr_clear (u);
++}
++
+ int
+ main (int argc, char *argv[])
+ {
+@@ -345,6 +433,8 @@ main (int argc, char *argv[])
+
+   tests_start_mpfr ();
+
++  bug20101018 ();
++
+   mpfr_init (x);
+   mpfr_init (s);
+   mpfr_init (y);
+diff -rupN mpfr-3.0.0.orig/tests/tgamma.c mpfr-3.0.0/tests/tgamma.c
+--- mpfr-3.0.0.orig/tests/tgamma.c	2010-11-17 14:50:50.706075400 -0700
++++ mpfr-3.0.0/tests/tgamma.c	2010-07-09 18:11:46.000000000 -0600
+@@ -461,6 +461,20 @@ test20071231 (void)
+   mpfr_clear (x);
+ }
+
++/* bug found by Stathis, only occurs on 32-bit machines */
++static void
++test20100709 (void)
++{
++  mpfr_t x;
++  int inex;
++
++  mpfr_init2 (x, 100);
++  mpfr_set_str (x, "-4.6308260837372266e+07", 10, MPFR_RNDN);
++  inex = mpfr_gamma (x, x, MPFR_RNDN);
++  MPFR_ASSERTN(MPFR_IS_ZERO(x) && MPFR_IS_NEG(x) && inex > 0);
++  mpfr_clear (x);
++}
++
+ int
+ main (int argc, char *argv[])
+ {
+@@ -471,6 +485,7 @@ main (int argc, char *argv[])
+   test_generic (2, 100, 2);
+   gamma_integer ();
+   test20071231 ();
++  test20100709 ();
+
+   data_check ("data/gamma", mpfr_gamma, "mpfr_gamma");
+
+diff -rupN mpfr-3.0.0.orig/tests/tout_str.c mpfr-3.0.0/tests/tout_str.c
+--- mpfr-3.0.0.orig/tests/tout_str.c	2010-11-17 14:50:50.753078100 -0700
++++ mpfr-3.0.0/tests/tout_str.c	2010-06-23 05:03:12.000000000 -0600
+@@ -46,22 +46,54 @@ static void
+ special (void)
+ {
+   mpfr_t x;
++  unsigned int n;
+
+   mpfr_init (x);
+
+   mpfr_set_nan (x);
+-  mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  if (n != 5)
++    {
++      printf ("Error: mpfr_out_str (file, 10, 0, NaN, MPFR_RNDN) wrote %u "
++              "characters instead of 5.\n", n);
++      exit (1);
++    }
+
+   mpfr_set_inf (x, 1);
+-  mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  if (n != 5)
++    {
++      printf ("Error: mpfr_out_str (file, 10, 0, +Inf, MPFR_RNDN) wrote %u "
++               "characters instead of 5.\n", n);
++      exit (1);
++    }
+
+   mpfr_set_inf (x, -1);
+-  mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  if (n != 6)
++    {
++      printf ("Error: mpfr_out_str (file, 10, 0, -Inf, MPFR_RNDN) wrote %u "
++               "characters instead of 6.\n", n);
++      exit (1);
++    }
+
+   mpfr_set_ui (x, 0, MPFR_RNDN);
+-  mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  if (n != 1)
++    {
++      printf ("Error: mpfr_out_str (file, 10, 0, +0, MPFR_RNDN) wrote %u "
++               "characters instead of 1.\n", n);
++      exit (1);
++    }
++
+   mpfr_neg (x, x, MPFR_RNDN);
+-  mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
++  if (n != 2)
++    {
++      printf ("Error: mpfr_out_str (file, 10, 0, -0, MPFR_RNDN) wrote %u "
++               "characters instead of 2.\n", n);
++      exit (1);
++    }
+
+   mpfr_clear (x);
+ }
+diff -rupN mpfr-3.0.0.orig/tests/tset_ld.c mpfr-3.0.0/tests/tset_ld.c
+--- mpfr-3.0.0.orig/tests/tset_ld.c	2010-11-17 14:50:50.773079300 -0700
++++ mpfr-3.0.0/tests/tset_ld.c	2010-10-21 15:18:26.000000000 -0600
+@@ -147,12 +147,39 @@ static void
+ test_fixed_bugs (void)
+ {
+   mpfr_t x;
+-  long double d;
++  long double l, m;
+
+   /* bug found by Steve Kargl (2009-03-14) */
+   mpfr_init2 (x, 64);
+   mpfr_set_ui_2exp (x, 1, -16447, MPFR_RNDN);
+-  d = mpfr_get_ld (x, MPFR_RNDN);  /* an assertion failed in init2.c:50 */
++  mpfr_get_ld (x, MPFR_RNDN);  /* an assertion failed in init2.c:50 */
++
++  /* bug reported by Jakub Jelinek (2010-10-17)
++     https://gforge.inria.fr/tracker/?func=detail&aid=11300 */
++  mpfr_set_prec (x, MPFR_LDBL_MANT_DIG);
++  /* l = 0x1.23456789abcdef0123456789abcdp-914L; */
++  l = 8.215640181713713164092636634579e-276;
++  mpfr_set_ld (x, l, MPFR_RNDN);
++  m = mpfr_get_ld (x, MPFR_RNDN);
++  if (m != l)
++    {
++      printf ("Error in get_ld o set_ld for l=%Le\n", l);
++      printf ("Got m=%Le instead of l\n", m);
++      exit (1);
++    }
++
++  /* another similar test which failed with extended double precision and the
++     generic code for mpfr_set_ld */
++  /* l = 0x1.23456789abcdef0123456789abcdp-968L; */
++  l = 4.560596445887084662336528403703e-292;
++  mpfr_set_ld (x, l, MPFR_RNDN);
++  m = mpfr_get_ld (x, MPFR_RNDN);
++  if (m != l)
++    {
++      printf ("Error in get_ld o set_ld for l=%Le\n", l);
++      printf ("Got m=%Le instead of l\n", m);
++      exit (1);
++    }
+
+   mpfr_clear (x);
+ }
+diff -rupN mpfr-3.0.0.orig/tests/tsub.c mpfr-3.0.0/tests/tsub.c
+--- mpfr-3.0.0.orig/tests/tsub.c	2010-11-17 14:50:50.791080300 -0700
++++ mpfr-3.0.0/tests/tsub.c	2010-10-21 14:59:32.000000000 -0600
+@@ -201,6 +201,8 @@ check_diverse (void)
+   if (mpfr_cmp (z, x))
+     {
+       printf ("Error in mpfr_sub (2)\n");
++      printf ("Expected "); mpfr_print_binary (x); puts ("");
++      printf ("Got      "); mpfr_print_binary (z); puts ("");
+       exit (1);
+     }
+   mpfr_set_str_binary (x, "1.1110111011110001110111011111111111101000011001011100101100101101");
+@@ -478,6 +480,156 @@ check_inexact (void)
+   mpfr_clear (u);
+ }
+
++/* Bug found by Jakub Jelinek
++ * http://bugzilla.redhat.com/643657
++ * https://gforge.inria.fr/tracker/index.php?func=detail&aid=11301
++ * The consequence can be either an assertion failure (i = 2 in the
++ * testcase below, in debug mode) or an incorrectly rounded value.
++ */
++static void
++bug20101017 (void)
++{
++  mpfr_t a, b, c;
++  int inex;
++  int i;
++
++  mpfr_init2 (a, GMP_NUMB_BITS * 2);
++  mpfr_init2 (b, GMP_NUMB_BITS);
++  mpfr_init2 (c, GMP_NUMB_BITS);
++
++  /* a = 2^(2N) + k.2^(2N-1) + 2^N and b = 1
++     with N = GMP_NUMB_BITS and k = 0 or 1.
++     c = a - b should round to the same value as a. */
++
++  for (i = 2; i <= 3; i++)
++    {
++      mpfr_set_ui_2exp (a, i, GMP_NUMB_BITS - 1, MPFR_RNDN);
++      mpfr_add_ui (a, a, 1, MPFR_RNDN);
++      mpfr_mul_2ui (a, a, GMP_NUMB_BITS, MPFR_RNDN);
++      mpfr_set_ui (b, 1, MPFR_RNDN);
++      inex = mpfr_sub (c, a, b, MPFR_RNDN);
++      mpfr_set (b, a, MPFR_RNDN);
++      if (! mpfr_equal_p (c, b))
++        {
++          printf ("Error in bug20101017 for i = %d.\n", i);
++          printf ("Expected ");
++          mpfr_out_str (stdout, 16, 0, b, MPFR_RNDN);
++          putchar ('\n');
++          printf ("Got      ");
++          mpfr_out_str (stdout, 16, 0, c, MPFR_RNDN);
++          putchar ('\n');
++          exit (1);
++        }
++      if (inex >= 0)
++        {
++          printf ("Error in bug20101017 for i = %d: bad inex value.\n", i);
++          printf ("Expected negative, got %d.\n", inex);
++          exit (1);
++        }
++    }
++
++  mpfr_set_prec (a, 64);
++  mpfr_set_prec (b, 129);
++  mpfr_set_prec (c, 2);
++  mpfr_set_str_binary (b, "0.100000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001E65");
++  mpfr_set_str_binary (c, "0.10E1");
++  inex = mpfr_sub (a, b, c, MPFR_RNDN);
++  if (mpfr_cmp_ui_2exp (a, 1, 64) != 0 || inex >= 0)
++    {
++      printf ("Error in mpfr_sub for b-c for b=2^64+1+2^(-64), c=1\n");
++      printf ("Expected result 2^64 with inex < 0\n");
++      printf ("Got "); mpfr_print_binary (a);
++      printf (" with inex=%d\n", inex);
++      exit (1);
++    }
++
++  mpfr_clears (a, b, c, (mpfr_ptr) 0);
++}
++
++/* hard test of rounding */
++static void
++check_rounding (void)
++{
++  mpfr_t a, b, c, res;
++  mpfr_prec_t p;
++  long k, l;
++  int i;
++
++#define MAXKL (2 * GMP_NUMB_BITS)
++  for (p = MPFR_PREC_MIN; p <= GMP_NUMB_BITS; p++)
++    {
++      mpfr_init2 (a, p);
++      mpfr_init2 (res, p);
++      mpfr_init2 (b, p + 1 + MAXKL);
++      mpfr_init2 (c, MPFR_PREC_MIN);
++
++      /* b = 2^p + 1 + 2^(-k), c = 2^(-l) */
++      for (k = 0; k <= MAXKL; k++)
++        for (l = 0; l <= MAXKL; l++)
++          {
++            mpfr_set_ui_2exp (b, 1, p, MPFR_RNDN);
++            mpfr_add_ui (b, b, 1, MPFR_RNDN);
++            mpfr_mul_2ui (b, b, k, MPFR_RNDN);
++            mpfr_add_ui (b, b, 1, MPFR_RNDN);
++            mpfr_div_2ui (b, b, k, MPFR_RNDN);
++            mpfr_set_ui_2exp (c, 1, -l, MPFR_RNDN);
++            i = mpfr_sub (a, b, c, MPFR_RNDN);
++            /* b - c = 2^p + 1 + 2^(-k) - 2^(-l), should be rounded to
++               2^p for l <= k, and 2^p+2 for l < k */
++            if (l <= k)
++              {
++                if (mpfr_cmp_ui_2exp (a, 1, p) != 0)
++                  {
++                    printf ("Wrong result in check_rounding\n");
++                    printf ("p=%lu k=%ld l=%ld\n", p, k, l);
++                    printf ("b="); mpfr_print_binary (b); puts ("");
++                    printf ("c="); mpfr_print_binary (c); puts ("");
++                    printf ("Expected 2^%lu\n", p);
++                    printf ("Got      "); mpfr_print_binary (a); puts ("");
++                    exit (1);
++                  }
++                if (i >= 0)
++                  {
++                    printf ("Wrong ternary value in check_rounding\n");
++                    printf ("p=%lu k=%ld l=%ld\n", p, k, l);
++                    printf ("b="); mpfr_print_binary (b); puts ("");
++                    printf ("c="); mpfr_print_binary (c); puts ("");
++                    printf ("a="); mpfr_print_binary (a); puts ("");
++                    printf ("Expected < 0, got %d\n", i);
++                    exit (1);
++                  }
++              }
++            else /* l < k */
++              {
++                mpfr_set_ui_2exp (res, 1, p, MPFR_RNDN);
++                mpfr_add_ui (res, res, 2, MPFR_RNDN);
++                if (mpfr_cmp (a, res) != 0)
++                  {
++                    printf ("Wrong result in check_rounding\n");
++                    printf ("b="); mpfr_print_binary (b); puts ("");
++                    printf ("c="); mpfr_print_binary (c); puts ("");
++                    printf ("Expected "); mpfr_print_binary (res); puts ("");
++                    printf ("Got      "); mpfr_print_binary (a); puts ("");
++                    exit (1);
++                  }
++                if (i <= 0)
++                  {
++                    printf ("Wrong ternary value in check_rounding\n");
++                    printf ("b="); mpfr_print_binary (b); puts ("");
++                    printf ("c="); mpfr_print_binary (c); puts ("");
++                    printf ("Expected > 0, got %d\n", i);
++                    exit (1);
++                  }
++              }
++          }
++
++      mpfr_clear (a);
++      mpfr_clear (res);
++      mpfr_clear (b);
++      mpfr_clear (c);
++    }
++}
++
+ #define TEST_FUNCTION test_sub
+ #define TWO_ARGS
+ #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), randlimb () % 100, RANDS)
+@@ -491,6 +643,8 @@ main (void)
+
+   tests_start_mpfr ();
+
++  bug20101017 ();
++  check_rounding ();
+   check_diverse ();
+   check_inexact ();
+   bug_ddefour ();
+diff -rupN mpfr-3.0.0.orig/version.c mpfr-3.0.0/version.c
+--- mpfr-3.0.0.orig/version.c	2010-11-17 14:50:50.822082100 -0700
++++ mpfr-3.0.0/version.c	2010-11-09 08:15:07.000000000 -0700
+@@ -25,5 +25,5 @@ http://www.gnu.org/licenses/ or write to
+ const char *
+ mpfr_get_version (void)
+ {
+-  return "3.0.0";
++  return "3.0.0-p8";
+ }