RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-19 11:02:59 +02:00
Code Issues Projects Releases Wiki Activity
Mirror of https://github.com/RPCS3/llvm-mirror
151,263 Commits 4 Branches 5 Tags 704 MiB
C++ 96.9%
C 1%
Python 1%
CMake 0.6%
OCaml 0.2%
Other 0.1%
c39b2b753b
Go to file
Stanislav Mekhanoshin c39b2b753b [AMDGPU] Always use rcp + mul with fast math 
Regardless of relaxation options such as -cl-fast-relaxed-math
we are producing rather long code for fdiv via amdgcn_fdiv_fast
intrinsic. This intrinsic is used to replace fdiv with 2.5ulp
metadata and does not handle denormals, thus believed to be fast.

An fdiv instruction can also have fast math flag either by itself
or together with fpmath metadata. Clang used with a relaxation flag
always produces both metadata and fast flag:

%div = fdiv fast float %v, %0, !fpmath !12
!12 = !{float 2.500000e+00}

Current implementation ignores fast flag and favors metadata. An
instruction with just fast flag would be lowered to a fastest rcp +
mul, but that never happen on practice because of described mutual
clang and BE behavior.

This change allows an "fdiv fast" to be always lowered as rcp + mul.

Differential Revision: https://reviews.llvm.org/D34844

llvm-svn: 307308
2017-07-06 20:34:21 +00:00
bindings [NFC] Remove multiple semicolons 2017-06-28 23:15:16 +00:00
cmake CMake: Add LLVM_UTILS_INSTALL_DIR option 2017-07-05 12:57:30 +00:00
docs remove an unused empty file. 2017-07-06 19:06:13 +00:00
examples [Orc] Remove the memory manager argument to addModule, and de-templatize the 2017-07-04 04:42:30 +00:00
include [ValueTracking] Support icmps fed by 'and' and 'or'. 2017-07-06 20:00:25 +00:00
lib [AMDGPU] Always use rcp + mul with fast math 2017-07-06 20:34:21 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +00:00
resources
runtimes [CMake][runtimes] Add install target for runtimes builtins 2017-06-02 19:38:11 +00:00
test [AMDGPU] Always use rcp + mul with fast math 2017-07-06 20:34:21 +00:00
tools Prototype: Reduce llvm-profdata merge memory usage further 2017-07-06 19:00:12 +00:00
unittests Prototype: Reduce llvm-profdata merge memory usage further 2017-07-06 19:00:12 +00:00
utils [opt-viewer] Move under tools, install it 2017-07-06 17:51:15 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt CMake: Add LLVM_UTILS_INSTALL_DIR option 2017-07-05 12:57:30 +00:00
CODE_OWNERS.TXT Remove the BBVectorize pass. 2017-06-30 07:09:08 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
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 are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.