Initial SIMDBC interpreter.

runtime/platform/globals.h

Index: runtime/platform/globals.h
diff --git a/runtime/platform/globals.h b/runtime/platform/globals.h
index 7e11bb3163e548452ce260bd0fb8be1ad1214f0d..40c4b07a47aef7d4047ecf750e2cac4265bc543e 100644
--- a/runtime/platform/globals.h
+++ b/runtime/platform/globals.h
@@ -257,6 +257,15 @@ typedef simd128_value_t fpu_register_t;
 #error Automatic compiler detection failed.
 #endif
 
+// DART_NOINLINE tells compiler to never inline a particular function.
+#ifdef _MSC_VER
+#define DART_NOINLINE __declspec(noinline)
+#elif __GNUC__
+#define DART_NOINLINE __attribute__((noinline))
+#else
+#error Automatic compiler detection failed.
+#endif
+
 // DART_UNUSED inidicates to the compiler that a variable/typedef is expected
 // to be unused and disables the related warning.
 #ifdef __GNUC__
@@ -282,6 +291,7 @@ typedef simd128_value_t fpu_register_t;
 #if !defined(TARGET_ARCH_X64)
 #if !defined(TARGET_ARCH_IA32)
 #if !defined(TARGET_ARCH_ARM64)
+#if !defined(TARGET_ARCH_DBC)
 // No target architecture specified pick the one matching the host architecture.
 #if defined(HOST_ARCH_MIPS)
 #define TARGET_ARCH_MIPS 1
@@ -301,6 +311,7 @@ typedef simd128_value_t fpu_register_t;
 #endif
 #endif
 #endif
+#endif
 
 // Verify that host and target architectures match, we cannot
 // have a 64 bit Dart VM generating 32 bit code or vice-versa.
@@ -337,6 +348,9 @@ typedef simd128_value_t fpu_register_t;
 #define USING_SIMULATOR 1
 #endif
 
+#elif defined(TARGET_ARCH_DBC)
+#define USING_SIMULATOR 1
+
 #else
 #error Unknown architecture.
 #endif