rev 5188 : 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.

   1 /*
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   3  * Copyright 2007, 2008, 2009, 2010, 2011 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
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  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
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  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "asm/assembler.hpp"
  28 #include "assembler_zero.inline.hpp"
  29 #include "code/debugInfoRec.hpp"
  30 #include "code/icBuffer.hpp"
  31 #include "code/vtableStubs.hpp"
  32 #include "interpreter/interpreter.hpp"
  33 #include "oops/compiledICHolder.hpp"
  34 #include "prims/jvmtiRedefineClassesTrace.hpp"
  35 #include "runtime/sharedRuntime.hpp"
  36 #include "runtime/vframeArray.hpp"
  37 #include "vmreg_zero.inline.hpp"
  38 
  39 #ifdef COMPILER1
  40 #include "c1/c1_Runtime1.hpp"
  41 #endif
  42 #ifdef COMPILER2
  43 #include "opto/runtime.hpp"
  44 #endif
  45 #ifdef SHARK
  46 #include "compiler/compileBroker.hpp"
  47 #include "shark/sharkCompiler.hpp"
  48 #endif
  49 
  50 
  51 
  52 static address zero_null_code_stub() {
  53   address start = ShouldNotCallThisStub();
  54   return start;
  55 }
  56 
  57 int SharedRuntime::java_calling_convention(const BasicType *sig_bt,
  58                                            VMRegPair *regs,
  59                                            int total_args_passed,
  60                                            int is_outgoing) {
  61   return 0;
  62 }
  63 
  64 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(
  65                         MacroAssembler *masm,
  66                         int total_args_passed,
  67                         int comp_args_on_stack,
  68                         const BasicType *sig_bt,
  69                         const VMRegPair *regs,
  70                         AdapterFingerPrint *fingerprint) {
  71   return AdapterHandlerLibrary::new_entry(
  72     fingerprint,
  73     CAST_FROM_FN_PTR(address,zero_null_code_stub),
  74     CAST_FROM_FN_PTR(address,zero_null_code_stub),
  75     CAST_FROM_FN_PTR(address,zero_null_code_stub));
  76 }
  77 
  78 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm,
  79                                                 methodHandle method,
  80                                                 int compile_id,
  81                                                 BasicType *sig_bt,
  82                                                 VMRegPair *regs,
  83                                                 BasicType ret_type) {
  84 #ifdef SHARK
  85   return SharkCompiler::compiler()->generate_native_wrapper(masm,
  86                                                             method,
  87                                                             compile_id,
  88                                                             sig_bt,
  89                                                             ret_type);
  90 #else
  91   ShouldNotCallThis();
  92   return NULL;
  93 #endif // SHARK
  94 }
  95 
  96 int Deoptimization::last_frame_adjust(int callee_parameters,
  97                                       int callee_locals) {
  98   return 0;
  99 }
 100 
 101 uint SharedRuntime::out_preserve_stack_slots() {
 102   ShouldNotCallThis();
 103   return 0;
 104 }
 105 
 106 JRT_LEAF(void, zero_stub())
 107   ShouldNotCallThis();
 108 JRT_END
 109 
 110 static RuntimeStub* generate_empty_runtime_stub(const char* name) {
 111   return CAST_FROM_FN_PTR(RuntimeStub*,zero_stub);
 112 }
 113 
 114 static SafepointBlob* generate_empty_safepoint_blob() {
 115   return CAST_FROM_FN_PTR(SafepointBlob*,zero_stub);
 116 }
 117 
 118 static DeoptimizationBlob* generate_empty_deopt_blob() {
 119   return CAST_FROM_FN_PTR(DeoptimizationBlob*,zero_stub);
 120 }
 121 
 122 
 123 void SharedRuntime::generate_deopt_blob() {
 124   _deopt_blob = generate_empty_deopt_blob();
 125 }
 126 
 127 SafepointBlob* SharedRuntime::generate_handler_blob(address call_ptr, int poll_type) {
 128   return generate_empty_safepoint_blob();
 129 }
 130 
 131 RuntimeStub* SharedRuntime::generate_resolve_blob(address destination, const char* name) {
 132   return generate_empty_runtime_stub("resolve_blob");
 133 }
 134 
 135 
 136 int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
 137                                          VMRegPair *regs,
 138                                          VMRegPair *regs2,
 139                                          int total_args_passed) {
 140   ShouldNotCallThis();
 141   return 0;
 142 }
--- EOF ---