mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-03-24 07:35:04 +00:00
a46dd583d6
This patch adds a check for underflow when truncating results back to lower precision at the end of an FMA. The additional sign handling logic in APFloat::fusedMultiplyAdd should only be performed when the result of the addition step of the FMA (in full precision) is exactly zero, not when the result underflows to zero. Unit tests for this case and related signed zero FMA results are included. Fixes <rdar://problem/18925551>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225123 91177308-0d34-0410-b5e6-96231b3b80d8
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for the Low Level Virtual Machine, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you're writing a package for LLVM, see docs/Packaging.rst for our suggestions.