Date: Wed, 10 Jan 2018 11:54:26 -0800 From: John Baldwin <jhb@freebsd.org> To: mips@freebsd.org Subject: Switch to hard-float by default? Message-ID: <2059726.KWgedH7NrU@ralph.baldwin.cx>
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I have been working on LLVM libunwind patches for MIPS and the last round has been to teach the unwinder to handle hard-float. As part of this I just fixed a bug which had broken HF support for N32 (in review now), and I have a working 'mipsn32hf' world that boots under qemu. However, if I add 'mipsn32hf' to the list of known targets that is yet another world to add to make universe. I wonder if instead we should consider switching MIPS to assume hard-float by default? We made that change for 32-bit arm recently. The simplest approach would be to add 'mipsn32hf' and then remove all the non '*hf' targets from Makefile.inc1 (if we only wanted to support HF). A more drastic approach would be to change the existing 'mips*' targets to assume hard-float, remove all the '*hf' targets (which are only in 12 anyway I think?) and add in explicit '*sf' targets if anyone has a need for them. Given that none of the *hf targets have been MFC'd are only present in 12 anyway, maybe the more drastic route is actually better? If we do go that route, does anyone have a use case for a '*sf' target? That is, is anyone running FreeBSD/mips on a processor that does not include an FPA? -- John Baldwin
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