mpn/generic/sec_sqr.c

/* mpn_sec_sqr.

   Contributed to the GNU project by Torbjörn Granlund.

Copyright 2013, 2014 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 either:

  * 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.

or

  * the GNU General Public License as published by the Free Software
    Foundation; either version 2 of the License, or (at your option) any
    later version.

or both in parallel, as here.

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 General Public License
for more details.

You should have received copies of the GNU General Public License and the
GNU Lesser General Public License along with the GNU MP Library.  If not,
see https://www.gnu.org/licenses/.  */

#include "gmp-impl.h"

#if ! HAVE_NATIVE_mpn_sqr_basecase
/* The limit of the generic code is SQR_TOOM2_THRESHOLD.  */
#define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
#endif

#if HAVE_NATIVE_mpn_sqr_basecase
#ifdef TUNE_SQR_TOOM2_MAX
/* We slightly abuse TUNE_SQR_TOOM2_MAX here.  If it is set for an assembly
   mpn_sqr_basecase, it comes from SQR_TOOM2_THRESHOLD_MAX in the assembly
   file.  An assembly mpn_sqr_basecase that does not define it should allow
   any size.  */
#define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
#endif
#endif

#ifdef WANT_FAT_BINARY
/* For fat builds, we use SQR_TOOM2_THRESHOLD which will expand to a read from
   __gmpn_cpuvec.  Perhaps any possible sqr_basecase.asm allow any size, and we
   limit the use unnecessarily.  We cannot tell, so play it safe.  FIXME.  */
#define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
#endif

void
mpn_sec_sqr (mp_ptr rp,
	     mp_srcptr ap, mp_size_t an,
	     mp_ptr tp)
{
#ifndef SQR_BASECASE_LIM
/* If SQR_BASECASE_LIM is now not defined, use mpn_sqr_basecase for any operand
   size.  */
  mpn_sqr_basecase (rp, ap, an);
#else
/* Else use mpn_mul_basecase.  */
  mpn_mul_basecase (rp, ap, an, ap, an);
#endif
}

mp_size_t
mpn_sec_sqr_itch (mp_size_t an)
{
  return 0;
}