archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 06:45:07 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8024344: PPC64 (part 112): C argument in register AND stack slot

Browse source 
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
This commit is contained in:
Goetz Lindenmaier 2013-09-12 13:51:13 -07:00
parent 2af861eed1
commit 081d2454fb
11 changed files with 28 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

6
hotspot/src/cpu/sparc/vm/sharedRuntime_sparc.cpp
View file

@ -1118,7 +1118,9 @@ static VMReg int_stk_helper( int i ) {
int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
VMRegPair *regs,
VMRegPair *regs2,
int total_args_passed) {
assert(regs2 == NULL, "not needed on sparc");
// Return the number of VMReg stack_slots needed for the args.
// This value does not include an abi space (like register window
@ -2096,7 +2098,7 @@ nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler* masm,
// the 1st six register arguments). It's weird see int_stk_helper.
//
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);
if (is_critical_native) {
// Critical natives may have to call out so they need a save area
@ -2843,7 +2845,7 @@ nmethod *SharedRuntime::generate_dtrace_nmethod(
// the 1st six register arguments). It's weird see int_stk_helper.
//
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.