X87: [turbofan] Add basic support for calling to (a subset of) C functions.

src/compiler/x87/code-generator-x87.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 "src/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/scopes.h"
@@ skipping 367 matching lines @@
       Register func = i.InputRegister(0);
       if (FLAG_debug_code) {
         // Check the function's context matches the context argument.
         __ cmp(esi, FieldOperand(func, JSFunction::kContextOffset));
         __ Assert(equal, kWrongFunctionContext);
       }
       AssembleDeconstructActivationRecord();
       __ jmp(FieldOperand(func, JSFunction::kCodeEntryOffset));
       break;
     }
+    case kArchPrepareCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      __ PrepareCallCFunction(num_parameters, i.TempRegister(0));
+      break;
+    }
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      if (HasImmediateInput(instr, 0)) {
+        ExternalReference ref = i.InputExternalReference(0);
+        __ CallCFunction(ref, num_parameters);
+      } else {
+        Register func = i.InputRegister(0);
+        __ CallCFunction(func, num_parameters);
+      }
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       break;
     case kArchLookupSwitch:
       AssembleArchLookupSwitch(instr);
       break;
     case kArchTableSwitch:
       AssembleArchTableSwitch(instr);
       break;
     case kArchNop:
@@ skipping 724 matching lines @@
       }
       break;
     }
     case kX87Push:
       if (HasImmediateInput(instr, 0)) {
         __ push(i.InputImmediate(0));
       } else {
         __ push(i.InputOperand(0));
       }
       break;
+    case kX87Poke: {
+      int const slot = MiscField::decode(instr->opcode());
+      if (HasImmediateInput(instr, 0)) {
+        __ mov(Operand(esp, slot * kPointerSize), i.InputImmediate(0));
+      } else {
+        __ mov(Operand(esp, slot * kPointerSize), i.InputRegister(0));
+      }
+      break;
+    }
     case kX87PushFloat32:
       __ lea(esp, Operand(esp, -kFloatSize));
       if (instr->InputAt(0)->IsDoubleStackSlot()) {
         __ fld_s(i.InputOperand(0));
         __ fstp_s(MemOperand(esp, 0));
       } else if (instr->InputAt(0)->IsDoubleRegister()) {
         __ fst_s(MemOperand(esp, 0));
       } else {
         UNREACHABLE();
       }
@@ skipping 704 matching lines @@
       __ Nop(padding_size);
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8