Re: -fast for G4 + G5
Re: -fast for G4 + G5
- Subject: Re: -fast for G4 + G5
- From: Dietrich Epp <email@hidden>
- Date: Sun, 14 Dec 2003 00:20:25 -0800
On Dec 13, 2003, at 10:03 PM, Brian Barnes wrote:
I'm not sure about the cpu numbering scheme, so what's the best cpu
type for -fast if you want the resulting code to run on both G4 + G5.
I should say ... ANY G4. -mcpu=7450 or -mcpu=7400?
From:
file:///Developer/Documentation/DeveloperTools/gcc-3.3/gcc/Optimize-
Options.html
http://developer.apple.com/documentation/DeveloperTools/gcc-3.3/gcc/
Optimize-Options.html
-fast
Optimize for maximum performance. -fast changes the overall
optimization strategy of GCC in order to produce the fastest possible
running code for PPC7450 and G5 architectures. By default,-fast
optimizes for G5. Programs optimized for G5 will not run on PPC7450. To
optimize for PPC7450, add -mcpu=7450 on command line.
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