[llvm] specify NaN behavior more precisely (PR #66579)
Ralf Jung via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 18 23:57:51 PDT 2023
================
@@ -3394,17 +3394,41 @@ Floating-Point Environment
The default LLVM floating-point environment assumes that traps are disabled and
status flags are not observable. Therefore, floating-point math operations do
not have side effects and may be speculated freely. Results assume the
-round-to-nearest rounding mode.
+round-to-nearest rounding mode, and subnormals are assumed to be preserved.
+Running default LLVM code in an environment where these assumptions are not met
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RalfJung wrote:
I'm mentioning `strictfp` now, I hope what I am saying makes sense. :)
https://github.com/llvm/llvm-project/pull/66579
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