1 /*
2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016 SAP SE. All rights reserved.
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
17 * 2 along with this work; if not, write to the Free Software Foundation,
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
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "interpreter/interp_masm.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "memory/allocation.inline.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/handles.inline.hpp"
35 #include "runtime/icache.hpp"
36 #include "runtime/interfaceSupport.inline.hpp"
37 #include "runtime/signature.hpp"
38
39 // Access macros for Java and C arguments.
40 // First Java argument is at index-1.
41 #define locals_j_arg_at(index) Address(Z_R1/*locals*/, in_ByteSize((-(index)*wordSize)))
42
43 #define __ _masm->
44
45 static int sp_c_int_arg_offset(int arg_nr, int fp_arg_nr) {
46 int int_arg_nr = arg_nr-fp_arg_nr;
47
48 // arg_nr, fp_arg_nr start with 1 => int_arg_nr starts with 0
49 if (int_arg_nr < 5) {
50 return int_arg_nr * wordSize + _z_abi(carg_1);
51 }
52 int offset = int_arg_nr - 5 + (fp_arg_nr > 4 ? fp_arg_nr - 4 : 0);
53 return offset * wordSize + _z_abi(remaining_cargs);
54 }
55
56 static int sp_c_fp_arg_offset(int arg_nr, int fp_arg_nr) {
57 int int_arg_nr = arg_nr-fp_arg_nr;
58
59 // Arg_nr, fp_arg_nr start with 1 => int_arg_nr starts with 0.
60 if (fp_arg_nr < 5) {
61 return (fp_arg_nr - 1 ) * wordSize + _z_abi(cfarg_1);
62 }
63 int offset = fp_arg_nr - 5 + (int_arg_nr > 4 ? int_arg_nr - 4 : 0);
64 return offset * wordSize + _z_abi(remaining_cargs);
65 }
66
67 // Implementation of SignatureHandlerGenerator
68 InteprerterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator(
69 const methodHandle& method, CodeBuffer* buffer) : NativeSignatureIterator(method) {
70 _masm = new MacroAssembler(buffer);
71 _fp_arg_nr = 0;
72 }
73
74 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
75 int int_arg_nr = jni_offset() - _fp_arg_nr;
76 Register r = (int_arg_nr < 5 /*max_int_register_arguments*/) ?
77 as_Register(int_arg_nr) + Z_ARG1->encoding() : Z_R0;
78
79 __ z_lgf(r, locals_j_arg_at(offset()));
80 if (DEBUG_ONLY(true ||) int_arg_nr >= 5) {
81 __ z_stg(r, sp_c_int_arg_offset(jni_offset(), _fp_arg_nr), Z_SP);
82 }
83 }
84
85 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
86 int int_arg_nr = jni_offset() - _fp_arg_nr;
87 Register r = (int_arg_nr < 5 /*max_int_register_arguments*/) ?
88 as_Register(int_arg_nr) + Z_ARG1->encoding() : Z_R0;
89
90 __ z_lg(r, locals_j_arg_at(offset() + 1)); // Long resides in upper slot.
91 if (DEBUG_ONLY(true ||) int_arg_nr >= 5) {
92 __ z_stg(r, sp_c_int_arg_offset(jni_offset(), _fp_arg_nr), Z_SP);
93 }
94 }
95
96 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
97 FloatRegister fp_reg = (_fp_arg_nr < 4/*max_fp_register_arguments*/) ?
98 as_FloatRegister((_fp_arg_nr * 2) + Z_FARG1->encoding()) : Z_F1;
99 _fp_arg_nr++;
100 __ z_ley(fp_reg, locals_j_arg_at(offset()));
101 if (DEBUG_ONLY(true ||) _fp_arg_nr > 4) {
102 __ z_ste(fp_reg, sp_c_fp_arg_offset(jni_offset(), _fp_arg_nr) + 4, Z_SP);
103 }
104 }
105
106 void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
107 FloatRegister fp_reg = (_fp_arg_nr < 4/*max_fp_register_arguments*/) ?
108 as_FloatRegister((_fp_arg_nr*2) + Z_FARG1->encoding()) : Z_F1;
109 _fp_arg_nr++;
110 __ z_ldy(fp_reg, locals_j_arg_at(offset()+1));
111 if (DEBUG_ONLY(true ||) _fp_arg_nr > 4) {
112 __ z_std(fp_reg, sp_c_fp_arg_offset(jni_offset(), _fp_arg_nr), Z_SP);
113 }
114 }
115
116 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
117 int int_arg_nr = jni_offset() - _fp_arg_nr;
118 Register r = (int_arg_nr < 5 /*max_int_register_arguments*/) ?
119 as_Register(int_arg_nr) + Z_ARG1->encoding() : Z_R0;
120
121 // The handle for a receiver will never be null.
122 bool do_NULL_check = offset() != 0 || is_static();
123
124 Label do_null;
125 if (do_NULL_check) {
126 __ clear_reg(r, true, false);
127 __ load_and_test_long(Z_R0, locals_j_arg_at(offset()));
128 __ z_bre(do_null);
129 }
130 __ add2reg(r, -offset() * wordSize, Z_R1 /* locals */);
131 __ bind(do_null);
132 if (DEBUG_ONLY(true ||) int_arg_nr >= 5) {
133 __ z_stg(r, sp_c_int_arg_offset(jni_offset(), _fp_arg_nr), Z_SP);
134 }
135 }
136
137
138 void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
139 __ z_lgr(Z_R1, Z_ARG1); // Z_R1 is used in locals_j_arg_at(index) macro.
140
141 // Generate code to handle arguments.
142 iterate(fingerprint);
143 __ load_const_optimized(Z_RET, AbstractInterpreter::result_handler(method()->result_type()));
144 __ z_br(Z_R14);
145 __ flush();
146 }
147
148 #undef __
149
150 // Implementation of SignatureHandlerLibrary
151
152 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
153
154 IRT_ENTRY(address, InterpreterRuntime::get_signature(JavaThread* thread, Method* method))
155 methodHandle m(thread, method);
156 assert(m->is_native(), "sanity check");
157 Symbol *s = m->signature();
158 return (address) s->base();
159 IRT_END
160
161 IRT_ENTRY(address, InterpreterRuntime::get_result_handler(JavaThread* thread, Method* method))
162 methodHandle m(thread, method);
163 assert(m->is_native(), "sanity check");
164 return AbstractInterpreter::result_handler(m->result_type());
165 IRT_END