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8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints

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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().

Reviewed-by: kvn
This commit is contained in:
Goetz Lindenmaier 2013-09-18 14:34:56 -07:00
parent 28ae8cc785
commit 5d63d647c1
10 changed files with 157 additions and 26 deletions
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65
hotspot/src/share/vm/runtime/sharedRuntime.cpp
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@ -2714,6 +2714,71 @@ void SharedRuntime::get_utf(oopDesc* src, address dst) {
}
#endif // ndef HAVE_DTRACE_H
int SharedRuntime::convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt) {
int argcnt = in_args_count;
if (CCallingConventionRequiresIntsAsLongs) {
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;
}
}
} else {
assert(0, "This should not be needed on this platform");
}
return argcnt;
}
void SharedRuntime::convert_ints_to_longints(int i2l_argcnt, int& in_args_count,
BasicType*& in_sig_bt, VMRegPair*& in_regs) {
if (CCallingConventionRequiresIntsAsLongs) {
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;
} else {
assert(0, "This should not be needed on this platform");
}
}
// -------------------------------------------------------------------------
// Java-Java calling convention
// (what you use when Java calls Java)