330d8983d2
In a nutshell, this moves our libomptarget code to populate the offload subproject. With this commit, users need to enable the new LLVM/Offload subproject as a runtime in their cmake configuration. No further changes are expected for downstream code. Tests and other components still depend on OpenMP and have also not been renamed. The results below are for a build in which OpenMP and Offload are enabled runtimes. In addition to the pure `git mv`, we needed to adjust some CMake files. Nothing is intended to change semantics. ``` ninja check-offload ``` Works with the X86 and AMDGPU offload tests ``` ninja check-openmp ``` Still works but doesn't build offload tests anymore. ``` ls install/lib ``` Shows all expected libraries, incl. - `libomptarget.devicertl.a` - `libomptarget-nvptx-sm_90.bc` - `libomptarget.rtl.amdgpu.so` -> `libomptarget.rtl.amdgpu.so.18git` - `libomptarget.so` -> `libomptarget.so.18git` Fixes: https://github.com/llvm/llvm-project/issues/75124 --------- Co-authored-by: Saiyedul Islam <Saiyedul.Islam@amd.com>
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
//===------- LibC.cpp - Simple implementation of libc functions --- C++ ---===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "LibC.h"
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#pragma omp begin declare target device_type(nohost)
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namespace impl {
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int32_t omp_vprintf(const char *Format, void *Arguments, uint32_t);
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}
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#pragma omp begin declare variant match( \
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device = {arch(nvptx, nvptx64)}, \
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implementation = {extension(match_any)})
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extern "C" int32_t vprintf(const char *, void *);
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namespace impl {
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int32_t omp_vprintf(const char *Format, void *Arguments, uint32_t) {
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return vprintf(Format, Arguments);
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}
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} // namespace impl
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#pragma omp end declare variant
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#pragma omp begin declare variant match(device = {arch(amdgcn)})
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#ifdef OMPTARGET_HAS_LIBC
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// TODO: Remove this handling once we have varargs support.
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extern "C" struct FILE *stdout;
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extern "C" int32_t rpc_fprintf(FILE *, const char *, void *, uint64_t);
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namespace impl {
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int32_t omp_vprintf(const char *Format, void *Arguments, uint32_t Size) {
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return rpc_fprintf(stdout, Format, Arguments, Size);
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}
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} // namespace impl
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#else
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// We do not have a vprintf implementation for AMD GPU so we use a stub.
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namespace impl {
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int32_t omp_vprintf(const char *Format, void *Arguments, uint32_t) {
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return -1;
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}
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} // namespace impl
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#endif
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#pragma omp end declare variant
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extern "C" {
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int memcmp(const void *lhs, const void *rhs, size_t count) {
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auto *L = reinterpret_cast<const unsigned char *>(lhs);
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auto *R = reinterpret_cast<const unsigned char *>(rhs);
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for (size_t I = 0; I < count; ++I)
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if (L[I] != R[I])
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return (int)L[I] - (int)R[I];
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return 0;
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}
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void memset(void *dst, int C, size_t count) {
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auto *dstc = reinterpret_cast<char *>(dst);
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for (size_t I = 0; I < count; ++I)
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dstc[I] = C;
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}
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/// printf() calls are rewritten by CGGPUBuiltin to __llvm_omp_vprintf
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int32_t __llvm_omp_vprintf(const char *Format, void *Arguments, uint32_t Size) {
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return impl::omp_vprintf(Format, Arguments, Size);
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}
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}
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#pragma omp end declare target
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