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__fixunstfti converts a long double (IBM double-double) to an unsigned 128 bit
integer. This patch enables it to handle a previously unhandled case in which
a negative low double may impact the result of the conversion.
Collaborated with @masoud.ataei and @renenkel.
Patch By: Baptiste Saleil
Differential Revision: https://reviews.llvm.org/D69193
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Use the uniform single line C++/99 style for code comments.
This is part of the cleanup proposed in "[RFC] compiler-rt builtins
cleanup and refactoring".
Differential Revision: https://reviews.llvm.org/D60352
llvm-svn: 359411
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to reflect the new license. These used slightly different spellings that
defeated my regular expressions.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351648
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This patch implements the __uint128_t __fixunstfti (long double) method for
PowerPC -- specifically to convert a long double (IBM double-double) to an
unsigned 128 bit integer.
The general approach of this algorithm is to convert the high and low doubles
of the long double and add them together if the doubles fit within 64 bits.
However, additional adjustments and scaling is performed when the high or low
double does not fit within a 64 bit integer.
To invoke this method, one can do so by linking against compiler-rt, via the
--rtlib=compiler-rt command line option supplied to clang.
Differential Revision: https://reviews.llvm.org/D54911
llvm-svn: 350815
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