MIPS64: Fixed int vs. uintptr_t confusion (plus some cleanup on the way).

test/cctest/test-platform.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "include/v8stdint.h"
 #include "src/base/build_config.h"
 #include "src/base/platform/platform.h"
 #include "test/cctest/cctest.h"
 
 #ifdef V8_CC_GNU
 
 static uintptr_t sp_addr = 0;
 
 void GetStackPointer(const v8::FunctionCallbackInfo<v8::Value>& args) {
 #if V8_HOST_ARCH_X64
   __asm__ __volatile__("mov %%rsp, %0" : "=g"(sp_addr));
 #elif V8_HOST_ARCH_IA32
   __asm__ __volatile__("mov %%esp, %0" : "=g"(sp_addr));
 #elif V8_HOST_ARCH_ARM
   __asm__ __volatile__("str %%sp, %0" : "=g"(sp_addr));
 #elif V8_HOST_ARCH_ARM64
   __asm__ __volatile__("mov x16, sp; str x16, %0" : "=g"(sp_addr));
 #elif V8_HOST_ARCH_MIPS
   __asm__ __volatile__("sw $sp, %0" : "=g"(sp_addr));
+#elif V8_HOST_ARCH_MIPS64
+  __asm__ __volatile__("sd $sp, %0" : "=g"(sp_addr));
 #else
 #error Host architecture was not detected as supported by v8
 #endif
 
   args.GetReturnValue().Set(v8::Integer::NewFromUnsigned(
       args.GetIsolate(), static_cast<uint32_t>(sp_addr)));
 }
 
 
 TEST(StackAlignment) {
@@ skipping 12 matching lines @@
 
   v8::Local<v8::Object> global_object = env->Global();
   v8::Local<v8::Function> foo =
       v8::Local<v8::Function>::Cast(global_object->Get(v8_str("foo")));
 
   v8::Local<v8::Value> result = foo->Call(global_object, 0, NULL);
   CHECK_EQ(0, result->Uint32Value() % v8::base::OS::ActivationFrameAlignment());
 }
 
 #endif  // V8_CC_GNU