Commit Graph

5 Commits

Author SHA1 Message Date
Bjorn Pettersson 6aac2773d8 [polly][GPGPU] Fixup related to overloading exponent type in llvm.powi
Commit 4c7f820b2b changed the llvm.powi intrinsic to support
different 'int' sizes for the exponent. That happened to break
the IntrinsicToLibdeviceFunc mapping in PPCGCodeGeneration, which
obviously should have been updated as part of commit 4c7f820b2b
(https://reviews.llvm.org/D99439).

The shortcoming was found by buildbots that use
   -DPOLLY_ENABLE_GPGPU_CODEGEN=ON

This patch should fixup the problem.
2021-06-18 08:59:06 +02:00
Siddharth Bhat 56572c6a5e [PPCGCodeGen] Convert intrinsics to libdevice functions whenever possible.
This is useful when we face certain intrinsics such as `llvm.exp.*`
which cannot be lowered by the NVPTX backend while other intrinsics can.

So, we would need to keep blacklists of intrinsics that cannot be
handled by the NVPTX backend. It is much simpler to try and promote
all intrinsics to libdevice versions.

This patch makes function/intrinsic very uniform, and will always try to use
a libdevice version if it exists.

Differential Revision: https://reviews.llvm.org/D37056

llvm-svn: 312239
2017-08-31 13:03:37 +00:00
Tobias Grosser 5170b6627a [GPGPU] Add log / logf to the libdevice supported functions
These two functions are used in COSMO

llvm-svn: 311322
2017-08-21 09:00:31 +00:00
Tobias Grosser 5b307cdb8a [GPGPU] Rename all, not only the first libdevice function
llvm-svn: 310194
2017-08-06 03:04:15 +00:00
Tobias Grosser 8fc6cdfb1c [GPGPU] Add support for NVIDIA libdevice
Summary:
This allows us to map functions such as exp, expf, expl, for which no
LLVM intrinsics exist. Instead, we link to NVIDIA's libdevice which provides
high-performance implementations of a wide range of (math) functions. We
currently link only a small subset, the exp, cos and copysign functions. Other
functions will be enabled as needed.

Reviewers: bollu, singam-sanjay

Reviewed By: bollu

Subscribers: tstellar, tra, nemanjai, pollydev, mgorny, llvm-commits, kbarton

Tags: #polly

Differential Revision: https://reviews.llvm.org/D35703

llvm-svn: 309560
2017-07-31 14:03:16 +00:00