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来自「最优秀的大数计算源码,适合各种大数的计算,底层对各种机器进行汇编优化,速度最快」· 代码 · 共 33 行

Copyright 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 2.1 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; see the file COPYING.LIB.  If not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.





This directory contains preliminary assembly code for nails-enabled
21264.  The code is not very well optimized.

1. The *mul_* functions use too many registers.  Several temps could be
   combined.
2. The *mul_1 functions load from up and rp very early.  The code could be
   considerably simplified with later loads.
3. The addmul_1 and submul_1 functions run 1.25 cycles/limb slower than
   possible with better U0/U1/L0/L1 scheduling.