[examples] added skeleton for pytorch wrapper

CMakeLists.txt

@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 2.8)
 project(triton)
 include(CTest)
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 # FLEX/YACC
 find_package(BISON)
@@ -16,7 +17,6 @@ include_directories(${BISON_Parser_INCLUDE_DIRECTORIES})
 
 # LLVM
 find_package(LLVM REQUIRED CONFIG)
-message(STATUS ${LLVM_INCLUDE_DIRS})
 include_directories(${LLVM_INCLUDE_DIRS})
 add_definitions(${LLVM_DEFINITIONS})
 #llvm_map_components_to_libnames(llvm_libs all)

cmake/FindTensorFlow.cmake

@@ -0,0 +1,21 @@
+include(FindPackageHandleStandardArgs)
+unset(TENSORFLOW_FOUND)
+
+execute_process(COMMAND python -c "from os.path import dirname; import tensorflow as tf; print(dirname(dirname(tf.sysconfig.get_include())))"
+                OUTPUT_VARIABLE TF_INC OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
+execute_process(COMMAND python -c "import tensorflow as tf; print(tf.sysconfig.get_lib())"
+                OUTPUT_VARIABLE TF_LIB OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
+execute_process(COMMAND python -c "import tensorflow as tf; print(tf.__cxx11_abi_flag__ if \"__cxx11_abi_flag__\" in tf.__dict__ else 0)"
+                OUTPUT_VARIABLE TF_ABI OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
+
+find_package_handle_standard_args(TensorFlow DEFAULT_MSG TF_INC TF_LIB)
+
+# set external variables for usage in CMakeLists.txt
+if(TensorFlow_FOUND)
+    set(TensorFlow_LIBRARIES ${TF_LIB})
+    set(TensorFlow_INCLUDE_DIRS ${TF_INC})
+    set(TensorFlow_ABI ${TF_ABI})
+endif()
+
+# hide locals from GUI
+mark_as_advanced(TF_INC TF_LIB TF_ABI)

cmake/FindTorch.cmake

@@ -0,0 +1,101 @@
+# FindTorch
+# -------
+#
+# Finds the Torch library
+#
+# This will define the following variables:
+#
+#   TORCH_FOUND        -- True if the system has the Torch library
+#   TORCH_INCLUDE_DIRS -- The include directories for torch
+#   TORCH_LIBRARIES    -- Libraries to link against
+#   TORCH_CXX_FLAGS    -- Additional (required) compiler flags
+#
+# and the following imported targets:
+#
+#   torch
+
+include(FindPackageHandleStandardArgs)
+
+if (DEFINED ENV{TORCH_INSTALL_PREFIX})
+  set(TORCH_INSTALL_PREFIX $ENV{TORCH_INSTALL_PREFIX})
+else()
+  # Assume we are in <install-prefix>/share/cmake/Torch/TorchConfig.cmake
+  get_filename_component(CMAKE_CURRENT_LIST_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+  get_filename_component(TORCH_INSTALL_PREFIX "${CMAKE_CURRENT_LIST_DIR}/../../../" ABSOLUTE)
+endif()
+
+# Include directories.
+if (EXISTS "${TORCH_INSTALL_PREFIX}/include")
+  set(TORCH_INCLUDE_DIRS
+    ${TORCH_INSTALL_PREFIX}/include
+    ${TORCH_INSTALL_PREFIX}/include/torch/csrc/api/include)
+else()
+  set(TORCH_INCLUDE_DIRS
+    ${TORCH_INSTALL_PREFIX}/include
+    ${TORCH_INSTALL_PREFIX}/include/torch/csrc/api/include)
+endif()
+
+# Library dependencies.
+if (@BUILD_SHARED_LIBS@)
+  find_package(Caffe2 REQUIRED PATHS ${CMAKE_CURRENT_LIST_DIR}/../Caffe2)
+endif()
+
+if (NOT ANDROID)
+  find_library(TORCH_LIBRARY torch PATHS "${TORCH_INSTALL_PREFIX}/lib")
+else()
+  find_library(TORCH_LIBRARY NO_CMAKE_FIND_ROOT_PATH torch PATHS "${TORCH_INSTALL_PREFIX}/lib")
+endif()
+add_library(torch UNKNOWN IMPORTED)
+set(TORCH_LIBRARIES torch ${Caffe2_MAIN_LIBS})
+
+if (NOT ANDROID)
+  find_library(C10_LIBRARY c10 PATHS "${TORCH_INSTALL_PREFIX}/lib")
+else()
+  find_library(C10_LIBRARY c10 NO_CMAKE_FIND_ROOT_PATH PATHS "${TORCH_INSTALL_PREFIX}/lib")
+endif()
+list(APPEND TORCH_LIBRARIES ${C10_LIBRARY})
+
+if (@USE_CUDA@)
+  if(MSVC)
+    set(NVTOOLEXT_HOME "C:/Program Files/NVIDIA Corporation/NvToolsExt")
+    if ($ENV{NVTOOLEXT_HOME})
+      set(NVTOOLEXT_HOME $ENV{NVTOOLEXT_HOME})
+    endif()
+    set(TORCH_CUDA_LIBRARIES
+      ${NVTOOLEXT_HOME}/lib/x64/nvToolsExt64_1.lib
+      ${CUDA_LIBRARIES})
+    list(APPEND TORCH_INCLUDE_DIRS ${NVTOOLEXT_HOME}/include)
+  elseif(APPLE)
+    set(TORCH_CUDA_LIBRARIES
+      ${CUDA_TOOLKIT_ROOT_DIR}/lib/libcudart.dylib
+      ${CUDA_TOOLKIT_ROOT_DIR}/lib/libnvrtc.dylib
+      ${CUDA_TOOLKIT_ROOT_DIR}/lib/libnvToolsExt.dylib
+      ${CUDA_LIBRARIES})
+  else()
+    find_library(LIBNVTOOLSEXT libnvToolsExt.so PATHS ${CUDA_TOOLKIT_ROOT_DIR}/lib64/)
+    set(TORCH_CUDA_LIBRARIES
+      ${CUDA_CUDA_LIB}
+      ${CUDA_NVRTC_LIB}
+      ${LIBNVTOOLSEXT}
+      ${CUDA_LIBRARIES})
+  endif()
+  find_library(C10_CUDA_LIBRARY c10_cuda PATHS "${TORCH_INSTALL_PREFIX}/lib")
+  list(APPEND TORCH_CUDA_LIBRARIES ${C10_CUDA_LIBRARY})
+  list(APPEND TORCH_LIBRARIES ${TORCH_CUDA_LIBRARIES})
+endif()
+
+# When we build libtorch with the old GCC ABI, dependent libraries must too.
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+  set(TORCH_CXX_FLAGS "-D_GLIBCXX_USE_CXX11_ABI=@GLIBCXX_USE_CXX11_ABI@")
+endif()
+
+set_target_properties(torch PROPERTIES
+    IMPORTED_LOCATION "${TORCH_LIBRARY}"
+    INTERFACE_INCLUDE_DIRECTORIES "${TORCH_INCLUDE_DIRS}"
+    CXX_STANDARD 11
+)
+if (TORCH_CXX_FLAGS)
+  set_property(TARGET torch PROPERTY INTERFACE_COMPILE_OPTIONS "${TORCH_CXX_FLAGS}")
+endif()
+
+find_package_handle_standard_args(torch DEFAULT_MSG TORCH_LIBRARY TORCH_INCLUDE_DIRS)

examples/python/CMakeLists.txt

@@ -1 +1,2 @@
 add_subdirectory(tensorflow)
+add_subdirectory(pytorch)

examples/python/pytorch/CMakeLists.txt

@@ -0,0 +1,6 @@
+find_package(Torch)
+if(${Torch_FOUND})
+    add_library(torch_triton SHARED conv.cpp)
+    target_compile_features(torch_triton PRIVATE cxx_range_for)
+    target_link_libraries(torch_triton "${TORCH_LIBRARIES}")
+endif()

examples/python/pytorch/conv.cpp

@@ -0,0 +1,30 @@
+#include <torch/torch.h>
+#include <vector>
+
+#define CHECK_CUDA(x) AT_CHECK(x.type().is_cuda(), #x " must be a CUDA tensor")
+#define CHECK_CONTIGUOUS(x) AT_CHECK(x.is_contiguous(), #x " must be contiguous")
+#define CHECK_INPUT(x) CHECK_CUDA(x); CHECK_CONTIGUOUS(x)
+
+at::Tensor conv_forward(
+    const at::Tensor data,
+    const at::Tensor weight) {
+  // Check
+  CHECK_INPUT(data);
+  CHECK_INPUT(weight);
+  // Unpack data shapes
+  const auto B  = data.size(0);
+  const auto Ci = data.size(1);
+  const auto H  = data.size(2);
+  const auto W  = data.size(3);
+  // Unpack weight shapes
+  const auto Cf = weight.size(0);
+  const auto R  = weight.size(1);
+  const auto S  = weight.size(2);
+  const auto K  = weight.size(3);
+  // Create output
+  AT_CHECK(Ci == Cf, "Number of channels in data and weights must match");
+  return at::empty({B, K, H, W}, at::kFloat);
+}
+
+static auto registry =
+  torch::jit::RegisterOperators("triton::conv::forward", &conv_forward);

examples/python/pytorch/main.py

@@ -0,0 +1,11 @@
+import math
+import numpy as np
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+from torch.autograd import Variable
+from torch.utils.cpp_extension import load
+from torch.distributions import categorical
+from itertools import product
+
+conv_triton = load( 'conv_triton', ['conv.cpp', 'conv.cu'], extra_cflags=['-O3'])

examples/python/tensorflow/CMakeLists.txt

@@ -1,14 +1,10 @@
-execute_process(COMMAND python -c "from os.path import dirname; import tensorflow as tf; print(dirname(dirname(tf.sysconfig.get_include())))"
-                OUTPUT_VARIABLE TF_INC OUTPUT_STRIP_TRAILING_WHITESPACE)
-execute_process(COMMAND python -c "import tensorflow as tf; print(tf.sysconfig.get_lib())"
-                OUTPUT_VARIABLE TF_LIB OUTPUT_STRIP_TRAILING_WHITESPACE)
-execute_process(COMMAND python -c "import tensorflow as tf; print(tf.__cxx11_abi_flag__ if \"__cxx11_abi_flag__\" in tf.__dict__ else 0)"
-                OUTPUT_VARIABLE TF_ABI OUTPUT_STRIP_TRAILING_WHITESPACE)
-
-set(CUDA_HOME "/usr/local/cuda")
-include_directories("${TF_INC}/tensorflow/include")
-include_directories("${CUDA_HOME}/include")
-link_directories(${TF_LIB})
-add_definitions(-D_GLIBCXX_USE_CXX11_ABI=0)
-add_library(tf_blocksparse SHARED blocksparse.cpp)
-target_link_libraries(tf_blocksparse tensorflow_framework triton)
+find_package(TensorFlow)
+if(${TensorFlow_FOUND})
+  set(CUDA_HOME "/usr/local/cuda")
+  include_directories("${TF_INC}/tensorflow/include")
+  include_directories("${CUDA_HOME}/include")
+  link_directories(${TF_LIB})
+  add_definitions(-D_GLIBCXX_USE_CXX11_ABI=0)
+  add_library(tf_blocksparse SHARED blocksparse.cpp)
+  target_link_libraries(tf_blocksparse tensorflow_framework triton)
+endif()