Experimental Physics and Industrial Control System
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Till Straumann wrote:
Certainly, both CPUs support the mandatory PPC UISA instruction set.
Hence, if you compile code with -mcpu=powerpc then it should execute
on either of the CPUs.
However, the 604 e.g., implements fsqrt/fsrqts (FP square-root in
hardware) which are enabled when you compile with
-mdouble-float/-msingle-float (or implicitly when you use -mcpu=604)
There may be other optional instructions that the 604 has and the
603 does not and which you may want to use if you have a 604.
Does that mean that sqrt() is slower on a ppc604 when I use
vxWorks-ppc32 because the hardware square root is not used?
Dirk
- Replies:
- Re: PPC603 / PPC604 differences? Till Straumann
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- PPC603 / PPC604 differences? Dirk Zimoch
- Re: PPC603 / PPC604 differences? Andrew Johnson
- Re: PPC603 / PPC604 differences? Till Straumann
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ANJ, 18 Nov 2013 |
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