This fixes:
```
[3334/7449] Building C object projects\compiler-rt\lib\builtins\CMakeFiles\clang_rt.builtins-x86_64.dir\extendsfdf2.c.obj
C:\git\llvm-project\compiler-rt\lib\builtins\fp_extend_impl.inc(63): warning C4018: '<': signed/unsigned mismatch
```
This patch implements __extendxftf2 (long double -> f128) and
__trunctfxf2 (f128 -> long double) on x86_64.
This is a preparation to unblock https://reviews.llvm.org/D53608,
We intentionally do not modify compiler-rt/lib/builtins/fp_lib.h in this
PR
(in particular, to limit the scope and avoid exposing other functions on
X86_64 in this PR).
Instead, TODOs were added to use fp_lib.h once it is available.
Test plan:
1. ninja check-compiler-rt (verified on X86_64 and on Aarch64)
In particular, new tests (extendxftf2_test.c and trunctfxf2_test.c) were
added.
2. compared the results of conversions with what other compilers (gcc)
produce.
Update formatting to use the LLVM style.
This is part of the cleanup proposed in "[RFC] compiler-rt builtins
cleanup and refactoring".
Differential Revision: https://reviews.llvm.org/D60351
llvm-svn: 359410
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
__inline is a vendor specific spelling for inline. clang and gcc treat it the
same as inline, and is available in MSVC 2013 which does not implement C99
(VS2015 supports the inline keyword though). This will allow us to build the
builtins using MSVC.
llvm-svn: 249953
Mostly uninteresting, except:
- in __extendXfYf2, when checking if the number is normal, the old
code relied on the unsignedness of src_rep_t, which is a problem
when sizeof(src_rep_t) < sizeof(int): the result gets promoted to
int, the signedness of which breaks the comparison.
I added an explicit cast; it shouldn't affect other types.
- we can't pass __fp16, so src_t and src_rep_t are the same.
- the gnu_*_ieee symbols are simply duplicated definitions, as aliases
are problematic on mach-o (where only weak aliases are supported;
that's not what we want).
Differential Revision: http://reviews.llvm.org/D9693
llvm-svn: 237161
