view tomsfastmath/src/addsub/fp_cmp_d.c @ 647:939cd3e22c87 dropbear-tfm

- Fix constraints so we don't get warned about uninitialised variable (it isn't used as input by the asm)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 30 Nov 2011 23:15:21 +0800
parents a362b62d38b2
children
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/* TomsFastMath, a fast ISO C bignum library.
 * 
 * This project is meant to fill in where LibTomMath
 * falls short.  That is speed ;-)
 *
 * This project is public domain and free for all purposes.
 * 
 * Tom St Denis, [email protected]
 */
#include <tfm.h>

/* compare against a single digit */
int fp_cmp_d(fp_int *a, fp_digit b)
{
  /* compare based on sign */
  if ((b && a->used == 0) || a->sign == FP_NEG) {
    return FP_LT;
  }

  /* compare based on magnitude */
  if (a->used > 1) {
    return FP_GT;
  }

  /* compare the only digit of a to b */
  if (a->dp[0] > b) {
    return FP_GT;
  } else if (a->dp[0] < b) {
    return FP_LT;
  } else {
    return FP_EQ;
  }

}

/* $Source$ */
/* $Revision$ */
/* $Date$ */