Mercurial > hg > truffle
diff src/cpu/x86/vm/sharedRuntime_x86_32.cpp @ 14416:6a936747b569
8024344: PPC64 (part 112): C argument in register AND stack slot.
Summary: On PPC, the first 13 floating point arguments to C calls are passed in floating point registers. Also, all but the first 8 arguments are passed on the stack. So there can be floating point arguments that are passed on the stack and in a register. We duplicate the regs datastructure in c_calling_convention() to represent this.
Reviewed-by: kvn, cjplummer
| author | goetz |
|---|---|
| date | Thu, 12 Sep 2013 13:51:13 -0700 |
| parents | e961c11b85fe |
| children | 1174c8abbdb6 |
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--- a/src/cpu/x86/vm/sharedRuntime_x86_32.cpp Fri Sep 06 20:16:09 2013 +0200 +++ b/src/cpu/x86/vm/sharedRuntime_x86_32.cpp Thu Sep 12 13:51:13 2013 -0700 @@ -977,7 +977,9 @@ int SharedRuntime::c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, + VMRegPair *regs2, int total_args_passed) { + assert(regs2 == NULL, "not needed on x86"); // We return the amount of VMRegImpl stack slots we need to reserve for all // the arguments NOT counting out_preserve_stack_slots. @@ -1624,7 +1626,7 @@ // Now figure out where the args must be stored and how much stack space // they require. int out_arg_slots; - out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); + out_arg_slots = c_calling_convention(out_sig_bt, out_regs, NULL, total_c_args); // Compute framesize for the wrapper. We need to handlize all oops in // registers a max of 2 on x86. @@ -2495,7 +2497,7 @@ // they require (neglecting out_preserve_stack_slots). int out_arg_slots; - out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); + out_arg_slots = c_calling_convention(out_sig_bt, out_regs, NULL, total_c_args); // Calculate the total number of stack slots we will need.