Hi, I'm looking for the correct list for a processor-specific problem.
This is code
ran on MacOSX, 10.1.5 and 10.3.6, a PCI G4 computer. The reason it is
processor-
specific is that a G3 building the same code runs faster than the
faster(Mhz) G4.
I think it may be the way the OS sets up for simple math, then again
it could be the
compiler setting simple math for an alti-vec processor.
The 10.3.6 base timings for a given system processes are:
400G4 178sec 350G3 176sec
400G4 100sec 350G3 99sec
400G4 188sec 350G3 186sec
What caught my eye was:
"do *--strPtr = ((val_ul & 7) + 48); while ((val_ul >>= 3));"
ran 2sec slower than
"do *--strPtr = _lowerhexstr[(val_ul & 7)]; while ((val_ul >>= 3));"
on 400G4 10.1.5 but on the G3 it ran 5sec faster.
On 10.3.6 a process timing non-system using first "do":
400G4 129sec 350G3 118sec
Earlier system tests of 300G3(not typo) to 400G4 both under 10.1.5
showed times like
400G4 76sec 300G3 102sec
400G4 103sec 300G3 141sec
Thanks for listening and hope you can direct me
Steve <email@hidden>
Please don't say "Apple" because I already know their response:
"Buy a new computer".
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