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diff --git a/mpfr/tests/tfits.c b/mpfr/tests/tfits.c
new file mode 100644
index 00000000..a7cd0250
--- /dev/null
+++ b/mpfr/tests/tfits.c
@@ -0,0 +1,287 @@
+/* Test file for:
+ mpfr_fits_sint_p, mpfr_fits_slong_p, mpfr_fits_sshort_p,
+ mpfr_fits_uint_p, mpfr_fits_ulong_p, mpfr_fits_ushort_p
+
+Copyright 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR 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 MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+MA 02110-1301, USA. */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"       /* for a build within gmp */
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+
+/* The ISO C99 standard specifies that in C++ implementations the
+   INTMAX_MAX, ... macros should only be defined if explicitly requested.  */
+#if defined __cplusplus
+# define __STDC_LIMIT_MACROS
+# define __STDC_CONSTANT_MACROS
+#endif
+
+#if HAVE_INTTYPES_H
+# include <inttypes.h> /* for intmax_t */
+#else
+# if HAVE_STDINT_H
+#  include <stdint.h>
+# endif
+#endif
+
+#include "mpfr-test.h"
+
+#define ERROR1 { printf("Initial error for x="); mpfr_dump(x); exit(1); }
+#define ERROR2 { printf("Error for x="); mpfr_dump(x); exit(1); }
+
+static void check_intmax (void);
+
+int
+main (void)
+{
+  mpfr_t x;
+
+  tests_start_mpfr ();
+
+  mpfr_init2 (x, 256);
+
+  /* Check NAN */
+  mpfr_set_nan(x);
+  if (mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR1;
+
+  /* Check INF */
+  mpfr_set_inf(x, 1);
+  if (mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR1;
+
+  /* Check Zero */
+  MPFR_SET_ZERO(x);
+  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR2;
+
+  /* Check small op */
+  mpfr_set_str1 (x, "1@-1");
+  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR2;
+
+  /* Check 17 */
+  mpfr_set_ui (x, 17, GMP_RNDN);
+  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR2;
+
+  /* Check all other values */
+  mpfr_set_ui(x, ULONG_MAX, GMP_RNDN);
+  mpfr_mul_2exp(x, x, 1, GMP_RNDN);
+  if (mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR1;
+  mpfr_mul_2exp(x, x, 40, GMP_RNDN);
+  if (mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR1;
+
+  mpfr_set_ui(x, ULONG_MAX, GMP_RNDN);
+  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR2;
+  mpfr_set_ui(x, LONG_MAX, GMP_RNDN);
+  if (!mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR2;
+  mpfr_set_ui(x, UINT_MAX, GMP_RNDN);
+  if (!mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR2;
+  mpfr_set_ui(x, INT_MAX, GMP_RNDN);
+  if (!mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR2;
+  mpfr_set_ui(x, USHRT_MAX, GMP_RNDN);
+  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR2;
+  mpfr_set_ui(x, SHRT_MAX, GMP_RNDN);
+  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR2;
+
+  mpfr_set_si(x, 1, GMP_RNDN);
+  if (!mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR2;
+
+  /* Check negative value */
+  mpfr_set_si (x, -1, GMP_RNDN);
+  if (!mpfr_fits_sint_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_slong_p(x, GMP_RNDN))
+    ERROR2;
+  if (mpfr_fits_uint_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_ushort_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_ulong_p(x, GMP_RNDN))
+    ERROR1;
+
+  mpfr_clear (x);
+
+  check_intmax ();
+
+  tests_end_mpfr ();
+  return 0;
+}
+
+static void check_intmax (void)
+{
+#ifdef _MPFR_H_HAVE_INTMAX_T
+  mpfr_t x;
+
+  mpfr_init2 (x, sizeof(uintmax_t)*CHAR_BIT);
+
+  /* Check NAN */
+  mpfr_set_nan(x);
+  if (mpfr_fits_uintmax_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_intmax_p(x, GMP_RNDN))
+    ERROR1;
+
+  /* Check INF */
+  mpfr_set_inf(x, 1);
+  if (mpfr_fits_uintmax_p(x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_intmax_p(x, GMP_RNDN))
+    ERROR1;
+
+  /* Check Zero */
+  MPFR_SET_ZERO(x);
+  if (!mpfr_fits_uintmax_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_intmax_p(x, GMP_RNDN))
+    ERROR2;
+
+  /* Check small op */
+  mpfr_set_str1 (x, "1@-1");
+  if (!mpfr_fits_uintmax_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_intmax_p(x, GMP_RNDN))
+    ERROR2;
+
+  /* Check 17 */
+  mpfr_set_ui (x, 17, GMP_RNDN);
+  if (!mpfr_fits_uintmax_p(x, GMP_RNDN))
+    ERROR2;
+  if (!mpfr_fits_intmax_p(x, GMP_RNDN))
+    ERROR2;
+
+  /* Check hugest */
+  mpfr_set_ui_2exp (x, 42, sizeof (uintmax_t) * 32, GMP_RNDN);
+  if (mpfr_fits_uintmax_p (x, GMP_RNDN))
+    ERROR1;
+  if (mpfr_fits_intmax_p (x, GMP_RNDN))
+    ERROR1;
+
+  /* Check all other values */
+  mpfr_set_uj (x, UINTMAX_MAX, GMP_RNDN);
+  mpfr_add_ui (x, x, 1, GMP_RNDN);
+  if (mpfr_fits_uintmax_p (x, GMP_RNDN))
+    ERROR1;
+  mpfr_set_uj (x, UINTMAX_MAX, GMP_RNDN);
+  if (!mpfr_fits_uintmax_p (x, GMP_RNDN))
+    ERROR2;
+  mpfr_set_sj (x, INTMAX_MAX, GMP_RNDN);
+  mpfr_add_ui (x, x, 1, GMP_RNDN);
+  if (mpfr_fits_intmax_p (x, GMP_RNDN))
+    ERROR1;
+  mpfr_set_sj (x, INTMAX_MAX, GMP_RNDN);
+  if (!mpfr_fits_intmax_p (x, GMP_RNDN))
+    ERROR2;
+  mpfr_set_sj (x, INTMAX_MIN, GMP_RNDN);
+  if (!mpfr_fits_intmax_p (x, GMP_RNDN))
+    ERROR2;
+  mpfr_sub_ui (x, x, 1, GMP_RNDN);
+  if (mpfr_fits_intmax_p (x, GMP_RNDN))
+    ERROR1;
+
+  /* Check negative value */
+  mpfr_set_si (x, -1, GMP_RNDN);
+  if (!mpfr_fits_intmax_p (x, GMP_RNDN))
+    ERROR2;
+  if (mpfr_fits_uintmax_p (x, GMP_RNDN))
+    ERROR1;
+
+  mpfr_clear (x);
+#endif
+}
+