Update to 2007-04-05 snapshot:
- PowerPC bugfixes:
- must clear carry bit when doing addic with a zero immediate value
- fix missing RETURN in micro-operation that would lead to random failures
and crashes
- add USE_PRECISE_EMULATION compilation-time option to choose between
getting exact floating point results and fast but less accurate computation.
- PowerPC improvments:
- add missing 64 bits rotate instructions
- safely define TARGET_PPCSPE when 64 bits registers are used
a separate target will be needed to use it in 32 bits mode on 32 bits hosts.
- MIPS: Fix enough FPU/R2 support to get 24Kf going.
- Add missing PowerPC 64 instructions
PowerPC 64 fixes.
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