qemu discuss - Jan 2008 - About gcc 4.2.2

Just reporting that I''ve compiled the latest QEMU source drop (not
kqemu) from os.org with gcc 4.2.2 and everything appears to work fine (Windows
Server 2003 32bit in the VM). Additional CFLAGS used were -march=athlon64 and
-O2.

Regards,
-mg
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This message posted from opensolaris.org

An update: I''ve thrown some super heavy optimization flags at gcc4, in
the hopes of accelerating the performance of the emulated devices.

My CFLAGS for my AthlonX2 look like this:
-march=athlon64 -msse3 -mfpmath=sse,387 -O3 -ffast-math -ftree-vectorize
-funroll-loops -fforce-addr -funswitch-loops -fivopts -ftree-loop-linear
-freorder-blocks-and-partition -finline-functions-called-once
-fexpensive-optimizations -fsched-spec-load -fsee

QEMU still appears to be working stable, but I sure noticed some heavy speed
improvements in screen drawing in a Windows guest that uses the VMware SVGA II
driver on QEMU''s VMware VGA device. Reference in question is the
application Quicken 2008, which likes to torture GDI and GDI+. I suppose, the
rest of the QEMU code improved, too.

Regards,
-mg
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This message posted from opensolaris.org

Just tried compiling the 64bit version of kqemu on gcc 4.2.2, too. Appears to
work fine, no crashes yet. I''ve tweaked common/Makefile.solaris though
to include again -march=athlon64.

Regards,
-mg
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This message posted from opensolaris.org