Fix ARM simulator build on Windows.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
===================================================================
--- src/arm/assembler-arm.cc	(revision 11193)
+++ src/arm/assembler-arm.cc	(working copy)
@@ -47,8 +47,8 @@
 #ifdef DEBUG
 bool CpuFeatures::initialized_ = false;
 #endif
-unsigned CpuFeatures::supported_ = 0;
-unsigned CpuFeatures::found_by_runtime_probing_ = 0;
+uint64_t CpuFeatures::supported_ = 0;
+uint64_t CpuFeatures::found_by_runtime_probing_ = 0;
 
 
 // Get the CPU features enabled by the build. For cross compilation the
@@ -80,7 +80,7 @@
 
 
 void CpuFeatures::Probe() {
-  unsigned standard_features = (OS::CpuFeaturesImpliedByPlatform() |
+  uint64_t standard_features = (OS::CpuFeaturesImpliedByPlatform() |
                                 CpuFeaturesImpliedByCompiler());
   ASSERT(supported_ == 0 || supported_ == standard_features);
 #ifdef DEBUG
@@ -746,7 +746,8 @@
         }
       }
     } else if ((*instr & kCmpCmnMask) == kCmpCmnPattern) {
-      if (fits_shifter(-imm32, rotate_imm, immed_8, NULL)) {
+      if (fits_shifter(-static_cast<int32_t>(imm32), rotate_imm,
+                       immed_8, NULL)) {
         *instr ^= kCmpCmnFlip;
         return true;
       }
@@ -754,7 +755,8 @@
       Instr alu_insn = (*instr & kALUMask);
       if (alu_insn == ADD ||
           alu_insn == SUB) {
-        if (fits_shifter(-imm32, rotate_imm, immed_8, NULL)) {
+        if (fits_shifter(-static_cast<int32_t>(imm32), rotate_imm,
+                         immed_8, NULL)) {
           *instr ^= kAddSubFlip;
           return true;
         }