Alternative div_qr_1

Torbjorn Granlund tg at
Thu Jun 17 11:45:58 CEST 2010

The new code is faster on most x86-64 machines, see

I suppose we should replace the generic/mod_1_1.c?

Have you looked into a mod_1_2 using the same ideas?  Perhaps it will be
tricky to get that to be as fast as possible without further restricting
the divisor range?


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