source/libs/gmp/gmp-src/mpn/generic/sec_sqr.c

   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.h"
  34 #include "gmp-impl.h"
  35
  36 #if ! HAVE_NATIVE_mpn_sqr_basecase
  37 /* The limit of the generic code is SQR_TOOM2_THRESHOLD.  */
  38 #define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
  39 #endif
  40
  41 #if HAVE_NATIVE_mpn_sqr_basecase
  42 #ifdef TUNE_SQR_TOOM2_MAX
  43 /* We slightly abuse TUNE_SQR_TOOM2_MAX here.  If it is set for an assembly
  44    mpn_sqr_basecase, it comes from SQR_TOOM2_THRESHOLD_MAX in the assembly
  45    file.  An assembly mpn_sqr_basecase that does not define it should allow
  46    any size.  */
  47 #define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
  48 #endif
  49 #endif
  50
  51 #ifdef WANT_FAT_BINARY
  52 /* For fat builds, we use SQR_TOOM2_THRESHOLD which will expand to a read from
  53    __gmpn_cpuvec.  Perhaps any possible sqr_basecase.asm allow any size, and we
  54    limit the use unnecessarily.  We cannot tell, so play it safe.  FIXME.  */
  55 #define SQR_BASECASE_LIM  SQR_TOOM2_THRESHOLD
  56 #endif
  57
  58 void
  59 mpn_sec_sqr (mp_ptr rp,
  60              mp_srcptr ap, mp_size_t an,
  61              mp_ptr tp)
  62 {
  63 #ifndef SQR_BASECASE_LIM
  64 /* If SQR_BASECASE_LIM is now not defined, use mpn_sqr_basecase for any operand
  65    size.  */
  66   mpn_sqr_basecase (rp, ap, an);
  67 #else
  68 /* Else use mpn_sqr_basecase for its allowed sizes, else mpn_mul_basecase.  */
  69   mpn_mul_basecase (rp, ap, an, ap, an);
  70 #endif
  71 }
  72
  73 mp_size_t
  74 mpn_sec_sqr_itch (mp_size_t an)
  75 {
  76   return 0;
  77 }