Add loongarch64 support

CMakeLists.txt

@@ -259,6 +259,14 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64|aarch64|AARCH64")
   endif(HAS_ARMV8_CRC)
 endif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64|aarch64|AARCH64")
 
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "loongarch64")
+  CHECK_C_COMPILER_FLAG("-march=loongarch64" HAS_LOONGARCH64)
+  if(HAS_LOONGARCH64)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mcpu=loongarch64 -mtune=loongarch64")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=loongarch64 -mtune=loongarch64")
+  endif(HAS_LOONGARCH64)
+endif(CMAKE_SYSTEM_PROCESSOR MATCHES "loongarch64")
+
 option(PORTABLE "build a portable binary" OFF)
 option(FORCE_SSE42 "force building with SSE4.2, even when PORTABLE=ON" OFF)
 option(FORCE_AVX "force building with AVX, even when PORTABLE=ON" OFF)

Makefile

@@ -1951,7 +1951,7 @@ JAVA_INCLUDE = -I$(JAVA_HOME)/include/ -I$(JAVA_HOME)/include/linux
 ifeq ($(PLATFORM), OS_SOLARIS)
 	ARCH := $(shell isainfo -b)
 else ifeq ($(PLATFORM), OS_OPENBSD)
-	ifneq (,$(filter amd64 ppc64 ppc64le arm64 aarch64 sparc64, $(MACHINE)))
+	ifneq (,$(filter amd64 ppc64 ppc64le arm64 aarch64 sparc64 loongarch64, $(MACHINE)))
 		ARCH := 64
 	else
 		ARCH := 32
@@ -1972,7 +1972,7 @@ ifneq ($(origin JNI_LIBC), undefined)
 endif
 
 ifeq (,$(ROCKSDBJNILIB))
-ifneq (,$(filter ppc% s390x arm64 aarch64 sparc64, $(MACHINE)))
+ifneq (,$(filter ppc% s390x arm64 aarch64 sparc64 loongarch64, $(MACHINE)))
 	ROCKSDBJNILIB = librocksdbjni-linux-$(MACHINE)$(JNI_LIBC_POSTFIX).so
 else
 	ROCKSDBJNILIB = librocksdbjni-linux$(ARCH)$(JNI_LIBC_POSTFIX).so

build_tools/build_detect_platform

@@ -634,6 +634,8 @@ if test "0$PORTABLE" -eq 0; then
     COMMON_FLAGS="$COMMON_FLAGS -mcpu=$POWER -mtune=$POWER "
   elif test -n "`echo $TARGET_ARCHITECTURE | grep ^s390x`"; then
     COMMON_FLAGS="$COMMON_FLAGS -march=z10 "
+  elif test -n "`echo $TARGET_ARCHITECTURE | grep ^loongarch64`"; then
+    COMMON_FLAGS="$COMMON_FLAGS -march=loongarch64 "
   elif test -n "`echo $TARGET_ARCHITECTURE | grep -e^arm -e^aarch64`"; then
     # TODO: Handle this with approprite options.
     COMMON_FLAGS="$COMMON_FLAGS"

java/src/main/java/org/rocksdb/util/Environment.java

@@ -22,6 +22,10 @@ public static boolean isAarch64() {
     return ARCH.contains("aarch64");
   }
 
+  public static boolean isLoongArch64() {
+    return ARCH.contains("loongarch64");
+  }
+
   public static boolean isPowerPC() {
     return ARCH.contains("ppc");
   }
@@ -103,7 +107,7 @@ private static String getLibcPostfix() {
   public static String getJniLibraryName(final String name) {
     if (isUnix()) {
       final String arch = is64Bit() ? "64" : "32";
-      if (isPowerPC() || isAarch64()) {
+      if (isPowerPC() || isAarch64() || isLoongArch64()) {
         return String.format("%sjni-linux-%s%s", name, ARCH, getLibcPostfix());
       } else if (isS390x()) {
         return String.format("%sjni-linux%s", name, ARCH);

port/port_posix.h

@@ -170,6 +170,8 @@ static inline void AsmVolatilePause() {
   asm volatile("yield");
 #elif defined(__powerpc64__)
   asm volatile("or 27,27,27");
+#elif defined(__loongarch64)
+  asm volatile("dbar 0");
 #endif
   // it's okay for other platforms to be no-ops
 }

third-party/folly/folly/Portability.h

@@ -25,6 +25,12 @@
 #define FOLLY_AARCH64 0
 #endif
 
+#if defined(__loongarch64)
+#define FOLLY_LOONGARCH64 1
+#else
+#define FOLLY_LOONGARCH64 0
+#endif
+
 #if defined(__powerpc64__)
 #define FOLLY_PPC64 1
 #else

third-party/folly/folly/portability/Asm.h

@@ -23,6 +23,8 @@ inline void asm_volatile_pause() {
   asm volatile("yield");
 #elif FOLLY_PPC64
   asm volatile("or 27,27,27");
+#elif defined(__loongarch64)
+  asm volatile("dbar 0");
 #endif
 }
 } // namespace folly

util/xxhash.cc

@@ -692,6 +692,7 @@ typedef XXH64_hash_t xxh_u64;
      || defined(_M_ARM64) || defined(__aarch64__) || defined(__arm64__) /* aarch64 */ \
      || defined(__PPC64__) || defined(__PPC64LE__) || defined(__ppc64__) || defined(__powerpc64__) /* ppc64 */ \
      || defined(__mips64__) || defined(__mips64)) /* mips64 */ \
+     || defined(__loongarch64) /* loongarch64 */ \
    || (!defined(SIZE_MAX) || SIZE_MAX < ULLONG_MAX) /* check limits */
 #    define XXH_REROLL_XXH64 1
 #  else

utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h

@@ -133,6 +133,10 @@ static inline tokutime_t toku_time_now(void) {
   return result;
 #elif defined(__powerpc__)
   return __ppc_get_timebase();
+#elif defined(__loongarch64)
+  unsigned long result;
+  asm volatile ("rdtime.d\t%0,$r0" : "=r" (result));
+  return result;
 #else
 #error No timer implementation for this platform
 #endif