Date: Fri, 23 Jun 2017 22:38:46 -0500 From: "A. Wilcox" <awilfox@...lielinux.org> To: musl@...ts.openwall.com Subject: Re: [PATCH] powerpc64le: Add single instruction math functions -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 23/06/17 22:05, David Edelsohn wrote: > Note that I only added the optimizations to the "powerpc64" port, > not the "powerpc" port. The powerpc64 port only support PPC64LE > Linux, which does not include PPC970. The comments about emulation > are not relevant to the "powerpc64" port. On 23/06/17 14:35, Rich Felker wrote: > Indeed, musl uses the ELFv2 ABI (minus its gratuitous mandate of > minimum ISA level) for both little and big endian powerpc64, and I > think we have users of both (people running it on old powerbooks, > etc.). These two statements contradict each other. Also, I have made a very minimal big-endian build of musl for the ppc64 architecture, but I haven't had any time to test it. There was never a 64-bit PowerPC laptop that I am aware; the highest spec PowerPC laptop would have been a Daystar with a 32-bit MPC7448. However, IBM, Apple, Tyan, and a few other manufacturers have released big-endian 64-bit PowerPC hardware in both workstation and server form. Let us also not forget that LoPAPR defines (at R1-2.7-1 in my copy, version 1.1 dated 24 March 2016) that Power Architecture platforms "must by default operate with Big-Endian addressing". Are you aware of any little-endian specific code in musl/powerpc64? I assume that libc-test would probably catch most of it when I am able to run it, but until then, it would be nice to know if there is anything I need to work on in the meantime. Best, - --arw : https://da.gd/LoPAPR - -- A. Wilcox (awilfox) Project Lead, Adélie Linux http://adelielinux.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJZTd6cAAoJEMspy1GSK50UAbIP/A7IxGHo1Zc3hEvWKPm233C2 zyk72OGdpJJ0RdLywOq2xR5wVLZSNAahnGVQyX1XN/SHx+QQxlI/VJ+mNJLdi641 UyUW3YkCasgci6+IwarO0xkFX3t1Rs4sMslNWSpSP0Uvffj/TsTkt1JtWzTwoB5y 0z9e+92jSx2HmSDay/TOt5fZghFENHWvpMdf+lJIT+nSKY7dVRZ1le896KR0c/RX +XIv9i7ilKqkBACvOU8T68+muU2uTD/JuuqmXlSwY/6V7gmm0Pi4F+YLYxwvkPFZ VwHvo2Dnei+zvcjEyFGYGjQ4qSXAjYCtYDLjFZLPmabXr3FQ8nJhGQ6hRGIwP6ut hXbZB1JJYefGoyqpMmjYcB2WBfN79McLK431nelru9rfFe+emi7CGCU7w7JTa22+ 4cRHhoHEf+q2OtfC9SB2C4ps2wpazbFU+E9nUYnO6QiTFpY9D3/hNPOno4+SvLwo 3A6ZO43paS4IW/Qaq7BAwD7pyGMSKErwqDlqdKcghkDBA7o54vZb+PANXaYwJ/hh sFxvGmZZvfsGu0FSBcbDzxZn3YjttSVCUzUewLsvOG8l1dVgfPuZ6EuekovHrwh1 OR1GmBd8lTa3C6KeBsZCXmOijYYhZ+NNpkSS8Pv/mPmyxyPTexwwPIH1NbFKEWsC 9Sx4LY7rH2Ww9MdodN4A =K5um -----END PGP SIGNATURE-----
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