1  /* mpn_sec_sqr.
       2  
       3     Contributed to the GNU project by Torbjörn Granlund.
       4  
       5  Copyright 2013, 2014 Free Software Foundation, Inc.
       6  
       7  This file is part of the GNU MP Library.
       8  
       9  The GNU MP Library is free software; you can redistribute it and/or modify
      10  it under the terms of either:
      11  
      12    * the GNU Lesser General Public License as published by the Free
      13      Software Foundation; either version 3 of the License, or (at your
      14      option) any later version.
      15  
      16  or
      17  
      18    * the GNU General Public License as published by the Free Software
      19      Foundation; either version 2 of the License, or (at your option) any
      20      later version.
      21  
      22  or both in parallel, as here.
      23  
      24  The GNU MP Library is distributed in the hope that it will be useful, but
      25  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      26  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      27  for more details.
      28  
      29  You should have received copies of the GNU General Public License and the
      30  GNU Lesser General Public License along with the GNU MP Library.  If not,
      31  see https://www.gnu.org/licenses/.  */
      32  
      33  #include "gmp-impl.h"
      34  
      35  #if ! HAVE_NATIVE_mpn_sqr_basecase
      36  /* The limit of the generic code is SQR_TOOM2_THRESHOLD.  */
      37  #define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
      38  #endif
      39  
      40  #if HAVE_NATIVE_mpn_sqr_basecase
      41  #ifdef TUNE_SQR_TOOM2_MAX
      42  /* We slightly abuse TUNE_SQR_TOOM2_MAX here.  If it is set for an assembly
      43     mpn_sqr_basecase, it comes from SQR_TOOM2_THRESHOLD_MAX in the assembly
      44     file.  An assembly mpn_sqr_basecase that does not define it should allow
      45     any size.  */
      46  #define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
      47  #endif
      48  #endif
      49  
      50  #ifdef WANT_FAT_BINARY
      51  /* For fat builds, we use SQR_TOOM2_THRESHOLD which will expand to a read from
      52     __gmpn_cpuvec.  Perhaps any possible sqr_basecase.asm allow any size, and we
      53     limit the use unnecessarily.  We cannot tell, so play it safe.  FIXME.  */
      54  #define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
      55  #endif
      56  
      57  void
      58  mpn_sec_sqr (mp_ptr rp,
      59  	     mp_srcptr ap, mp_size_t an,
      60  	     mp_ptr tp)
      61  {
      62  #ifndef SQR_BASECASE_LIM
      63  /* If SQR_BASECASE_LIM is now not defined, use mpn_sqr_basecase for any operand
      64     size.  */
      65    mpn_sqr_basecase (rp, ap, an);
      66  #else
      67  /* Else use mpn_mul_basecase.  */
      68    mpn_mul_basecase (rp, ap, an, ap, an);
      69  #endif
      70  }
      71  
      72  mp_size_t
      73  mpn_sec_sqr_itch (mp_size_t an)
      74  {
      75    return 0;
      76  }