x86_64 TImode arithmetic

["Jan Beulich" <JBeulich at novell dot com>]

There wasn't TImode low-level support similar to x86's DImode support.
Implementing this (leaving out shifts for now, since they would require
a new operand constraint letter, the alocation policy for which I don't
know) required eliminating all the fake TImode arithmetic previously
being done to handle certain V2DFmode and V4SFmode operations, which
makes the patch larger than I originally hoped for. Still, this has
always been a misuse and thus I think is a good thing to eliminate even
for 32-bit x86.

Jan

Attachment: gcc-3.4.0-x86_64-TImode-arithmetic.patch
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