PPC/s390: [async-iteration] implement AsyncGenerator

src/builtins/s390/builtins-s390.cc

 // Copyright 2014 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.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 635 matching lines @@
   Generate_JSConstructStubHelper(masm, false, false, false);
 }
 
 void Builtins::Generate_JSBuiltinsConstructStubForDerived(
     MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, false, false, true);
 }
 
 // static
 void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
+  Generate_ResumeGenerator(masm, ResumeGeneratorType::kGenerator);
+}
+
+// static
+void Builtins::Generate_ResumeAsyncGeneratorTrampoline(MacroAssembler* masm) {
+  Generate_ResumeGenerator(masm, ResumeGeneratorType::kAsyncGenerator);
+}
+
+// static
+void Builtins::Generate_ResumeAwaitedAsyncGeneratorTrampoline(
+    MacroAssembler* masm) {
+  Generate_ResumeGenerator(masm, ResumeGeneratorType::kAwaitedAsyncGenerator);
+}
+
+void Builtins::Generate_ResumeGenerator(MacroAssembler* masm,
+                                        ResumeGeneratorType type) {
   // ----------- S t a t e -------------
   //  -- r2 : the value to pass to the generator
   //  -- r3 : the JSGeneratorObject to resume
   //  -- r4 : the resume mode (tagged)
   //  -- lr : return address
   // -----------------------------------
-  __ AssertGeneratorObject(r3);
+  if (type == ResumeGeneratorType::kGenerator) {
+    __ AssertGeneratorObject(r3);
+  } else {
+    __ AssertAsyncGeneratorObject(r3);
+  }
 
   // Store input value into generator object.
-  __ StoreP(r2, FieldMemOperand(r3, JSGeneratorObject::kInputOrDebugPosOffset),
-            r0);
-  __ RecordWriteField(r3, JSGeneratorObject::kInputOrDebugPosOffset, r2, r5,
-                      kLRHasNotBeenSaved, kDontSaveFPRegs);
+  int offset = type == ResumeGeneratorType::kAwaitedAsyncGenerator
+                   ? JSAsyncGeneratorObject::kAwaitInputOrDebugPosOffset
+                   : JSGeneratorObject::kInputOrDebugPosOffset;
+  __ StoreP(r2, FieldMemOperand(r3, offset), r0);
+  __ RecordWriteField(r3, offset, r2, r5, kLRHasNotBeenSaved, kDontSaveFPRegs);
 
   // Store resume mode into generator object.
   __ StoreP(r4, FieldMemOperand(r3, JSGeneratorObject::kResumeModeOffset));
 
   // Load suspended function and context.
   __ LoadP(r6, FieldMemOperand(r3, JSGeneratorObject::kFunctionOffset));
   __ LoadP(cp, FieldMemOperand(r6, JSFunction::kContextOffset));
 
   // Flood function if we are stepping.
   Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator;
@@ skipping 2388 matching lines @@
   // Now jump to the instructions of the returned code object.
   __ Jump(ip);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_S390