src/share/vm/runtime/sharedRuntime.cpp
Print this page
rev 5186 : 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 in PhaseIdealLoop::intrinsify_fill().
@@ -2712,10 +2712,71 @@
assert(TypeArrayKlass::cast(jlsValue->klass())->element_type() == T_CHAR, "compressed string");
(void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size);
}
#endif // ndef HAVE_DTRACE_H
+int SharedRuntime::convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt) {
+ assert(SharedRuntime::c_calling_convention_requires_ints_as_longs(), "");
+
+ int argcnt = in_args_count;
+ for (int in = 0; in < in_args_count; in++) {
+ BasicType bt = in_sig_bt[in];
+ switch (bt) {
+ case T_BOOLEAN:
+ case T_CHAR:
+ case T_BYTE:
+ case T_SHORT:
+ case T_INT:
+ argcnt++;
+ break;
+ default:
+ break;
+ }
+ }
+
+ return argcnt;
+}
+
+void SharedRuntime::convert_ints_to_longints(int i2l_argcnt, int& in_args_count,
+ BasicType*& in_sig_bt, VMRegPair*& in_regs) {
+ assert(SharedRuntime::c_calling_convention_requires_ints_as_longs(), "");
+
+ VMRegPair *new_in_regs = NEW_RESOURCE_ARRAY(VMRegPair, i2l_argcnt);
+ BasicType *new_in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, i2l_argcnt);
+
+ int argcnt = 0;
+ for (int in = 0; in < in_args_count; in++, argcnt++) {
+ BasicType bt = in_sig_bt[in];
+ VMRegPair reg = in_regs[in];
+ switch (bt) {
+ case T_BOOLEAN:
+ case T_CHAR:
+ case T_BYTE:
+ case T_SHORT:
+ case T_INT:
+ // convert (bt) to (T_LONG,bt)
+ new_in_sig_bt[argcnt ] = T_LONG;
+ new_in_sig_bt[argcnt+1] = bt;
+ assert(reg.first()->is_valid() && !reg.second()->is_valid(), "");
+ new_in_regs[argcnt ].set2(reg.first());
+ new_in_regs[argcnt+1].set_bad();
+ argcnt++;
+ break;
+ default:
+ // no conversion needed
+ new_in_sig_bt[argcnt] = bt;
+ new_in_regs[argcnt] = reg;
+ break;
+ }
+ }
+ assert(argcnt == i2l_argcnt, "must match");
+
+ in_regs = new_in_regs;
+ in_sig_bt = new_in_sig_bt;
+ in_args_count = i2l_argcnt;
+}
+
// -------------------------------------------------------------------------
// Java-Java calling convention
// (what you use when Java calls Java)
//------------------------------name_for_receiver----------------------------------