Talk:Power ISA
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:
- Forget where I found the link to this document, but it might help place POWER5 in the chart? POWER5 Architecture
- Cell Broadband Engine Architecture and its first implementation
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.
