This commit moves the 'native' builtins that use asm statements to
generate LLVM intrinsics to the CLC library. In doing so it converts
them to use the appropriate elementwise builtin to generate the same
intrinsic; there are no codegen changes to any target except to AMDGPU
targets where `native_log` is no longer custom implemented and instead
used the clang elementwise builtin.
This work forms part of #127196 and indeed with this commit there are no
'generic' builtins using/abusing asm statements - the remaining builtins
are specific to the amdgpu and r600 targets.
This commit bulk updates all '.h', '.cl', '.inc', and '.cpp' files to
add any missing license headers.
The remaining files are generally CMake, SOURCES, scripts, markdown,
etc.
There are still some '.ll' files which may benefit from a license
header. I can't find an example of an LLVM IR file with a license header
in the rest of LLVM, but unlike most other (sub)projects, libclc has
examples of LLVM IR as source files, compiled and built into the
library.
This is fairly straightforward for most targets.
We use the element-wise sqrt builtin by default. We also remove a legacy
pre-filtering of the input argument, which the intrinsic now officially
handles.
AMDGPU provides its own implementation of sqrt for double types. This
commit moves this into the implementation of CLC sqrt. It uses weak
linkage on the 'default' CLC sqrt to allow AMDGPU to only override the
builtin for the types it cares about.
There were two implementations of this - one that implemented nextafter
in software, and another that called a clang builtin. No in-tree targets
called the builtin, so all targets build the software version. The
builtin version has been removed, and the software version has been
renamed to be the "default".
This commit also optimizes nextafter, to avoid scalarization as much as
possible. Note however that the (CLC) relational builtins still
scalarize; those will be optimized in a separate commit.
Since nextafter is used by some convert_type builtins, the diff to IR
codegen is not limited to the builtin itself.
Use llvm instrinsic by default
Provide amdgpu workaround
v2: drop old amd copyrights
Reviewer: Aaron Watry
Reviewed-by: Vedran Miletić <vedran@miletic.net>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 316588
AMDGPU targets don't have insturction for it,
so it'll be expanded to C * log2 anyway.
v2: use native_log2 instead of the more precise sw implementation
v3: move to amdgpu
v4: drop old AMD copyright
Reviewer: Aaron Watry
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 316587
The implementation uses r600 sepcific intrinsics
LLVM-4 switched to _ro_t and _rw_t image types
Portions of the code can be moved back as more targets/llvm versions add image support
Reviewer: Aaron Watry
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 315341
v2: add vload(half) as well
make helpers amdgpu specific (NVPTX uses different private AS numbering)
use clang builtin on clang >= 6
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Tom Stellard <tstellar@redhat.com>
llvm-svn: 312839
Add missing undefs
Make helpers amdgpu specific (NVPTX uses different numbering for private AS)
Use clang builtins on clang >= 6
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Tom Stellard <tstellar@redhat.com>
llvm-svn: 312838
We don't have memory fences for r600 so just call group barrier directly
Make sure that barrier is called even with 0 flags
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Aaron Watry <awatry@gmail.com>
llvm-svn: 312492
v2: split into 2 patches
use clang builtins for other intrinsics as well
v3: Fix warnings
Switch r600 to use implictarg.ptr
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 276442
Most files remain in a common amdgpu directory.
Also switches barriers to to use convergent,
and use llvm.amdgcn.s.barrier.
This now requires 3.9/trunk to build amdgcn.
llvm-svn: 260777
