Date: Wed, 11 Sep 2019 07:46:55 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: [PATCH] mips: add single-instruction math functions On Wed, Sep 11, 2019 at 01:05:04PM +0300, info@...ile-stream.com wrote: > > non-commit text: > gcc puts annoying nop into the delay slot for these functions, e.g.: > abs.d $f0,$f12 > jr $ra > nop > is there any way to get rid of this without using pure .S? I think you don't want to get rid of it anyway, since if FPU emulation is in use, emulation of floating point instructions in branch delay slots is really problematic and requires nasty hacks with executable stacks and whatnot. It would be nice if we could tell GCC not to put the fpu instructions it generates in branch delay slots either, but I don't know a way to do that. Rich
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