s390x, ppc: Corrections to CallApiCallback calling convention

Related:
c6b0e12e [nojit] Refactor CallApiCallback calling convention
a31338aa PPC/s390: [nojit] Refactor CallApiCallback calling convention


Change-Id: I8f96c7b9a32ba3dde9dbbabb115d79fa36a0db46
Reviewed-on: https://chromium-review.googlesource.com/c/1380991Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#58496}

src/builtins/ppc/builtins-ppc.cc

@@ -3006,8 +3006,7 @@ void Builtins::Generate_CallApiCallback(MacroAssembler* masm) {
             MemOperand(sp, (kStackFrameExtraParamSlot + 2) * kPointerSize));
 
   // FunctionCallbackInfo::length_.
-  __ StoreP(argc,
-            MemOperand(sp, (kStackFrameExtraParamSlot + 3) * kPointerSize));
+  __ stw(argc, MemOperand(sp, (kStackFrameExtraParamSlot + 3) * kPointerSize));
 
   // We also store the number of bytes to drop from the stack after returning
   // from the API function here.

src/builtins/s390/builtins-s390.cc

@@ -2994,7 +2994,7 @@ void Builtins::Generate_CallApiCallback(MacroAssembler* masm) {
             MemOperand(sp, (kStackFrameExtraParamSlot + 2) * kPointerSize));
 
   // FunctionCallbackInfo::length_.
-  __ StoreP(argc,
+  __ StoreW(argc,
             MemOperand(sp, (kStackFrameExtraParamSlot + 3) * kPointerSize));
 
   // We also store the number of bytes to drop from the stack after returning