toom54

[Niels Möller]

Torbjorn Granlund <tg at gmplib.org> writes:

> But first MUL_TOOM43_TO_TOOM54_THRESHOLD needs to be measured and set to
> some default.

I have pushed in an attempt at tuning code. Please have a look to see if
makes sense. I measure a line with an operand size ratio 5/6. On this
core2 machine I get

#define MUL_TOOM43_TO_TOOM54_THRESHOLD     100

I set the default to 150, since other tuned thresholds seem to be a bit
smaller than the defaults.

/nisse

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