Add support for the TILE-Gx processor family.

src/Makefile.am

@@ -42,6 +42,7 @@ nobase_include_HEADERS =                                        \
   google/protobuf/stubs/atomicops.h                             \
   google/protobuf/stubs/atomicops_internals_aix.h               \
   google/protobuf/stubs/atomicops_internals_arm64_gcc.h         \
+  google/protobuf/stubs/atomicops_internals_tile_gcc.h          \
   google/protobuf/stubs/atomicops_internals_arm_gcc.h           \
   google/protobuf/stubs/atomicops_internals_arm_qnx.h           \
   google/protobuf/stubs/atomicops_internals_atomicword_compat.h \

src/google/protobuf/stubs/atomicops.h

@@ -207,6 +207,8 @@ GOOGLE_PROTOBUF_ATOMICOPS_ERROR
 #include <google/protobuf/stubs/atomicops_internals_arm64_gcc.h>
 #elif defined(GOOGLE_PROTOBUF_ARCH_ARM_QNX)
 #include <google/protobuf/stubs/atomicops_internals_arm_qnx.h>
+#elif defined(GOOGLE_PROTOBUF_ARCH_TILE)
+#include <google/protobuf/stubs/atomicops_internals_tile_gcc.h>
 #elif defined(GOOGLE_PROTOBUF_ARCH_MIPS) || defined(GOOGLE_PROTOBUF_ARCH_MIPS64)
 #include <google/protobuf/stubs/atomicops_internals_mips_gcc.h>
 #elif defined(__native_client__)

src/google/protobuf/stubs/atomicops_internals_tile_gcc.h

@@ -0,0 +1,77 @@
+#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_
+#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_
+
+namespace google {
+namespace protobuf {
+namespace internal {
+
+inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
+    asm volatile ("st4 %0, %1"
+                  : "=r" (*ptr)
+                  : "m" (value));
+}
+
+inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
+    Atomic32 dest;
+    asm volatile ("ld4s %0, %1"
+                  : "=r" (dest)
+                  : "m" (*ptr));
+    return dest;
+}
+
+inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
+    asm volatile ("st %0, %1"
+                  : "=r" (*ptr)
+                  : "m" (value));
+}
+
+inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
+    Atomic64 dest;
+    asm volatile ("ld %0, %1"
+                  : "=r" (dest)
+                  : "m" (*ptr));
+    return dest;
+}
+
+inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
+    return NoBarrier_Load(ptr);
+}
+
+inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
+    NoBarrier_Store(ptr, value);
+}
+
+inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
+                                       Atomic64 old_value,
+                                       Atomic64 new_value) {
+    Atomic64 tmp;
+    asm volatile ("mtspr CMPEXCH_VALUE, %3\n\t"
+                  "cmpexch %0, %1, %2"
+                  : "=r" (tmp), "=m" (*ptr)
+                  : "r" (new_value), "r" (old_value));
+    return tmp;
+}
+
+inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
+                                         Atomic64 new_value) {
+    Atomic64 old_value;
+    asm volatile ("exch %0, %1, %2"
+                  : "=r" (old_value), "=m" (*ptr)
+                  : "r" (new_value));
+    return old_value;
+}
+
+inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr,
+                                          Atomic64 value) {
+    Atomic64 dest;
+    asm volatile ("fetchadd %0, %1, %2"
+                  : "=r" (dest), "=m" (*ptr)
+                  : "r" (value));
+    return *ptr;
+}
+
+}
+}
+}
+
+#endif

src/google/protobuf/stubs/platform_macros.h

@@ -52,6 +52,9 @@
 #elif defined(__ARMEL__)
 #define GOOGLE_PROTOBUF_ARCH_ARM 1
 #define GOOGLE_PROTOBUF_ARCH_32_BIT 1
+#elif defined(__tile__)
+#define GOOGLE_PROTOBUF_ARCH_TILE 1
+#define GOOGLE_PROTOBUF_ARCH_64_BIT 1
 #elif defined(__aarch64__)
 #define GOOGLE_PROTOBUF_ARCH_AARCH64 1
 #define GOOGLE_PROTOBUF_ARCH_64_BIT 1