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

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

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index 3afb86af45556328c1af7f805c3cf578e4eb216a..3e4f8d8c895ac54f410207fc155908060383e871 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.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;