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大数运算库

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
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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for more details.

You should have received a copy of the GNU Lesser General Public License along
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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.