--- /dev/null
+/* mpf_cmp_ui -- Compare a float with an unsigned integer.
+
+Copyright 1993, 1994, 1995, 1999, 2001, 2002 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 3 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 MP Library. If not, see http://www.gnu.org/licenses/. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+int
+mpf_cmp_ui (mpf_srcptr u, unsigned long int vval)
+{
+ mp_srcptr up;
+ mp_size_t usize;
+ mp_exp_t uexp;
+ mp_limb_t ulimb;
+
+ uexp = u->_mp_exp;
+ usize = u->_mp_size;
+
+ /* 1. Is U negative? */
+ if (usize < 0)
+ return -1;
+ /* We rely on usize being non-negative in the code that follows. */
+
+ if (vval == 0)
+ return usize != 0;
+
+ /* 2. Are the exponents different (V's exponent == 1)? */
+#if GMP_NAIL_BITS != 0
+ if (uexp > 1 + (vval > GMP_NUMB_MAX))
+ return 1;
+ if (uexp < 1 + (vval > GMP_NUMB_MAX))
+ return -1;
+#else
+ if (uexp > 1)
+ return 1;
+ if (uexp < 1)
+ return -1;
+#endif
+
+ up = u->_mp_d;
+
+ ulimb = up[usize - 1];
+#if GMP_NAIL_BITS != 0
+ if (usize >= 2 && uexp == 2)
+ {
+ if ((ulimb >> GMP_NAIL_BITS) != 0)
+ return 1;
+ ulimb = (ulimb << GMP_NUMB_BITS) | up[usize - 2];
+ usize--;
+ }
+#endif
+ usize--;
+
+ /* 3. Compare the most significant mantissa limb with V. */
+ if (ulimb > vval)
+ return 1;
+ else if (ulimb < vval)
+ return -1;
+
+ /* Ignore zeroes at the low end of U. */
+ while (*up == 0)
+ {
+ up++;
+ usize--;
+ }
+
+ /* 4. Now, if the number of limbs are different, we have a difference
+ since we have made sure the trailing limbs are not zero. */
+ if (usize > 0)
+ return 1;
+
+ /* Wow, we got zero even if we tried hard to avoid it. */
+ return 0;
+}