MIPS: [turbofan] Add support for calling to (a subset of) C functions.

src/compiler/mips64/code-generator-mips64.cc

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index 998a4f3f894bdb08d4396fe4357fc9f6e17d2b8e..e03c695b59b36ed8a1ea662ee1180e33463353b4 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -463,6 +463,17 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ Jump(at);
       break;
     }
+    case kArchPrepareCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      __ PrepareCallCFunction(num_parameters, kScratchReg);
+      break;
+    }
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      Register func = i.InputRegister(0);
+      __ CallCFunction(func, num_parameters);
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       break;