src/cpu/x86/vm/globalDefinitions_x86.hpp

rev 5190 : 8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
Summary: Some platforms, as ppc and s390x/zArch require that 32-bit ints are passed as 64-bit values to C functions. This change adds support to adapt the signature and to issue proper casts to c2-compiled stubs. The functions are used in generate_native_wrapper(). Adapt signature used by the compiler as in PhaseIdealLoop::intrinsify_fill().

@@ -25,8 +25,14 @@
 #ifndef CPU_X86_VM_GLOBALDEFINITIONS_X86_HPP
 #define CPU_X86_VM_GLOBALDEFINITIONS_X86_HPP
 
 const int StackAlignmentInBytes  = 16;
 
+// Indicates whether the C calling conventions require that
+// 32-bit integer argument values are properly extended to 64 bits.
+// If set, SharedRuntime::c_calling_convention() must adapt
+// signatures accordingly.
+const bool CCallingConventionRequiresIntsAsLongs = false;
+
 #define SUPPORTS_NATIVE_CX8
 
 #endif // CPU_X86_VM_GLOBALDEFINITIONS_X86_HPP