Date: Sat, 11 Jan 2020 11:07:01 -0500 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: [PATCH] math: move more x86-family lrint functions to C On Sat, Jan 11, 2020 at 06:23:54PM +0300, Alexander Monakov wrote: > --- > It was news to me that GCC inline asm conventions allow to specify > effect on x87 register stack. Here a clobber tells the compiler > that the asm pops the topmost element off the stack. Is this documented/reliable/supported by other compilers (clang, pcc, old gcc)? It looks very nice and I hope we can do it; otherwise it looks like a gratuitous instruction would be needed. But I want to make sure it's safe. Rich
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