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The implementation in LegalizeIntegerTypes to handle this as sint64->float + appropriate power of 2 is subject to double rounding, considered incorrect by numerics people. Use this implementation only when it is safe. This leads to using library calls in some cases that produced inline code before, but it's correct now. (EVTToAPFloatSemantics belongs somewhere else, any suggestions?) Add a correctly rounding (though not particularly fast) conversion that uses X87 80-bit computations for x86-32. 7885399, 5901940. This shows up in gcc.c-torture/execute/ieee/rbug.c in the gcc testsuite on some platforms. llvm-svn: 103883 |
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README.txt
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 HTML documentation provided in docs/index.html for further assistance with LLVM. If you're writing a package for LLVM, see docs/Packaging.html for our suggestions.