Talk:Power ISA

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Trying to place POWER4, 970 in the chart

Recently I was talking on Twitter about how OpenBSD has PowerPC support for Macs up to and in including the 970 (G5 in Apple-speak) although only in 32 bit mode. Since it's missing from the chart, I thought I'd try to add it. Progress so far:

  • According to IBM, "The PPC 970 enhances the POWER4 instruction set with 162 Single Instruction/Multiple Data (SIMD) instructions that allow many processing elements to perform the same operations on different data in parallel." this is from a product overview of a BladeCenter JS20
  • Wikipedia says POWER4 was PowerPC ISA v.2.00/01, but I'm still looking for the source for that.

Other possibly useful documents, just not for POWER4/970:

Also, someone smarter than me might be able to merge this info with the current chart; it's the -qarch documentation for IBM's XL Fortran compiler, listing which targets have different feature support. Documentation for newer XL Fortran compiler versions strips a lot of this out. Olddellian (talk) 20:41, 17 March 2019 (CDT)


I've already looked at the PowerISA and compliant cores thing. Long story short, I couldn't figure it out. Compare even these Wikipedia sites:

https://en.wikipedia.org/wiki/Power_ISA

https://en.wikipedia.org/wiki/List_of_PowerPC_processors

https://en.wikipedia.org/wiki/IBM_POWER_microprocessors

https://github.com/torvalds/linux/blob/master/Documentation/powerpc/isa-versions.rst

https://www.kernel.org/doc/Documentation/powerpc/isa-versions.rst

Also the POWER1 … 9 Wiki pages.

I also searched some RedBooks and unfortunately didn't find all the informations.

As long as I'm not sure, I won't touch the chart.

MPC7500 (talk) 19:57, 20 March 2019 (CDT)

Here is another source: https://embarc.org/man-pages/gcc/PowerPC-Built_002din-Functions.html

POWER5+ v2.03

POWER5 v2.02

POWER4+ v2.01 (I guess)

POWER4 v2.00

MPC7500 (talk) 5:56, 22 March 2019 (CDT)