[llvm-dev] Floating point semantic modes

[Kaylor, Andrew via llvm-dev]

> I don't know if LLVM supports it, but RISC-V as well as a few other architectures also support to-nearest-ties-to-max-magnitude.

Yeah, that’s come up a few times in reviews. We should start factoring it into our plans, but from a clang point of view, I’m not sure how you’d get into that mode.

We don’t have it in the list of possible rounding modes for the constrained intrinsics either. We should fix that.

-Andy

From: Jacob Lifshay <programmerjake at gmail.com>
Sent: Monday, January 27, 2020 3:53 PM
To: Kaylor, Andrew <andrew.kaylor at intel.com>
Cc: Clang Dev <cfe-dev at lists.llvm.org>; LLVM Developers Mailing List <llvm-dev at lists.llvm.org>; Ristow, Warren <warren.ristow at sony.com>; Ulrich Weigand (Ulrich.Weigand at de.ibm.com) <Ulrich.Weigand at de.ibm.com>; Cameron McInally <cameron.mcinally at nyu.edu>; Kevin Neal <Kevin.Neal at sas.com>; Blower, Melanie I <melanie.blower at intel.com>; sepavloff at gmail.com; hfinkel at anl.gov; Sanjay Patel <spatel at rotateright.com>; Wang, Pengfei <pengfei.wang at intel.com>
Subject: Re: [llvm-dev] Floating point semantic modes

On Mon, Jan 27, 2020, 15:24 Kaylor, Andrew via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:
rounding_mode { dynamic, tonearest, downward, upward, towardzero }
I don't know if LLVM supports it, but RISC-V as well as a few other architectures also support to-nearest-ties-to-max-magnitude.

Jacob Lifshay
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