Add LoongArch support (#51109)

CMakeLists.txt

@@ -298,6 +298,7 @@ option(WITH_CRYPTO "Compile PaddlePaddle with crypto support" ON)
 option(WITH_ARM "Compile PaddlePaddle with arm support" OFF)
 option(WITH_SW "Compile PaddlePaddle with sw support" OFF)
 option(WITH_MIPS "Compile PaddlePaddle with mips support" OFF)
+option(WITH_LOONGARCH "Compile PaddlePaddle with loongarch support" OFF)
 option(WITH_MUSL "Compile with musl libc instead of gblic" OFF)
 option(WITH_UNITY_BUILD "Compile with UnityBuild mode" OFF)
 option(WITH_STRIP "Strip so files of Whl packages" OFF)
@@ -659,6 +660,16 @@ if(WITH_MIPS)
   add_definitions(-DPADDLE_WITH_MIPS)
 endif()
 
+if(WITH_LOONGARCH)
+  set(WITH_XBYAK
+      OFF
+      CACHE STRING "Disable XBYAK when compiling WITH_LOONGARCH=ON" FORCE)
+  set(WITH_MKL
+      OFF
+      CACHE STRING "Disable MKL when compiling WITH_LOONGARCH=ON." FORCE)
+  add_definitions(-DPADDLE_WITH_LOONGARCH)
+endif()
+
 if(WITH_ONEMKL)
   add_definitions(-DPADDLE_WITH_ONEMKL)
 endif()

cmake/external/openblas.cmake

@@ -26,6 +26,10 @@ if(WITH_MIPS)
   set(CBLAS_TAG v0.3.13)
 endif()
 
+if(WITH_LOONGARCH)
+  set(CBLAS_TAG v0.3.18)
+endif()
+
 if(NOT WIN32)
   set(CBLAS_LIBRARIES
       "${CBLAS_INSTALL_DIR}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}openblas${CMAKE_STATIC_LIBRARY_SUFFIX}"

cmake/flags.cmake

@@ -196,7 +196,8 @@ if(NOT WIN32)
   if(NOT WITH_NV_JETSON
      AND NOT WITH_ARM
      AND NOT WITH_SW
-     AND NOT WITH_MIPS)
+     AND NOT WITH_MIPS
+     AND NOT WITH_LOONGARCH)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")
   endif()
 endif()

paddle/fluid/operators/search_compute.h

@@ -15,7 +15,7 @@ limitations under the License. */
 #pragma once
 
 #if !defined(PADDLE_WITH_ARM) && !defined(PADDLE_WITH_SW) && \
-    !defined(PADDLE_WITH_MIPS)
+    !defined(PADDLE_WITH_MIPS) && !defined(PADDLE_WITH_LOONGARCH)
 #include <immintrin.h>
 #endif
 #include <cfloat>
@@ -103,7 +103,7 @@ void call_gemm_batched(const framework::ExecutionContext& ctx,
 }
 
 #if !defined(PADDLE_WITH_ARM) && !defined(PADDLE_WITH_SW) && \
-    !defined(PADDLE_WITH_MIPS)
+    !defined(PADDLE_WITH_MIPS) && !defined(PADDLE_WITH_LOONGARCH)
 
 #define __m256x __m256
 
@@ -144,7 +144,7 @@ inline void axpy(const T* x, T* y, size_t len, const T alpha) {
                       _mm256_mul_px(mm_alpha, _mm256_load_px(x + jjj))));
   }
 #elif defined(PADDLE_WITH_ARM) || defined(PADDLE_WITH_SW) || \
-    defined(PADDLE_WITH_MIPS)
+    defined(PADDLE_WITH_MIPS) || defined(PADDLE_WITH_LOONGARCH)
   PADDLE_THROW(platform::errors::Unimplemented("axpy is not supported"));
 #else
   lll = len & ~SSE_CUT_LEN_MASK;
@@ -174,7 +174,7 @@ inline void axpy_noadd(const T* x, T* y, size_t len, const T alpha) {
     _mm256_store_px(y + jjj, _mm256_mul_px(mm_alpha, _mm256_load_px(x + jjj)));
   }
 #elif defined(PADDLE_WITH_ARM) || defined(PADDLE_WITH_SW) || \
-    defined(PADDLE_WITH_MIPS)
+    defined(PADDLE_WITH_MIPS) || defined(PADDLE_WITH_LOONGARCH)
   PADDLE_THROW(platform::errors::Unimplemented("axpy_noadd is not supported"));
 #else
   lll = len & ~SSE_CUT_LEN_MASK;

paddle/fluid/platform/denormal.cc

@@ -29,7 +29,8 @@
 #endif
 
 #if !defined(GCC_WITHOUT_INTRINSICS) && !defined(PADDLE_WITH_ARM) && \
-    !defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS) && !defined(_WIN32)
+    !defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS) &&        \
+    !defined(_WIN32) && !defined(PADDLE_WITH_LOONGARCH)
 #define DENORM_USE_INTRINSICS
 #endif
 

paddle/phi/backends/cpu/cpu_info.cc

@@ -166,7 +166,8 @@ bool MayIUse(const cpu_isa_t cpu_isa) {
     return true;
   } else {
 #if !defined(WITH_NV_JETSON) && !defined(PADDLE_WITH_ARM) &&  \
-    !defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS)
+    !defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS) && \
+    !defined(PADDLE_WITH_LOONGARCH)
     int reg[4];
     cpuid(reg, 0);
     int nIds = reg[0];

paddle/phi/backends/cpu/cpu_info.h

@@ -41,7 +41,8 @@
 #define cpuid(reg, x) __cpuidex(reg, x, 0)
 #else
 #if !defined(WITH_NV_JETSON) && !defined(PADDLE_WITH_ARM) &&  \
-    !defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS)
+    !defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS) && \
+    !defined(PADDLE_WITH_LOONGARCH)
 #include <cpuid.h>
 inline void cpuid(int reg[4], int x) {
   __cpuid_count(x, 0, reg[0], reg[1], reg[2], reg[3]);