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1 /*
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2 * Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_interpreterRT_sparc.cpp.incl"
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27
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28
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29 #define __ _masm->
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30
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31
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32 // Implementation of SignatureHandlerGenerator
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33
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34 void InterpreterRuntime::SignatureHandlerGenerator::pass_word(int size_of_arg, int offset_in_arg) {
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35 Argument jni_arg(jni_offset() + offset_in_arg, false);
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36 Register Rtmp = O0;
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37 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
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38
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39 __ store_argument(Rtmp, jni_arg);
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40 }
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41
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42 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
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43 Argument jni_arg(jni_offset(), false);
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44 Register Rtmp = O0;
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45
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46 #ifdef ASSERT
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47 if (TaggedStackInterpreter) {
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48 // check at least one tag is okay
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49 Label ok;
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50 __ ld_ptr(Llocals, Interpreter::local_tag_offset_in_bytes(offset() + 1), Rtmp);
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51 __ cmp(Rtmp, G0);
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52 __ brx(Assembler::equal, false, Assembler::pt, ok);
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53 __ delayed()->nop();
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54 __ stop("Native object has bad tag value");
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55 __ bind(ok);
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56 }
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57 #endif // ASSERT
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58
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59 #ifdef _LP64
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60 __ ldx(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
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61 __ store_long_argument(Rtmp, jni_arg);
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62 #else
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63 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
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64 __ store_argument(Rtmp, jni_arg);
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65 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 0), Rtmp);
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66 Argument successor(jni_arg.successor());
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67 __ store_argument(Rtmp, successor);
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68 #endif
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69 }
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70
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71
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72 #ifdef _LP64
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73 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
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74 Argument jni_arg(jni_offset(), false);
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75 FloatRegister Rtmp = F0;
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76 __ ldf(FloatRegisterImpl::S, Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
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77 __ store_float_argument(Rtmp, jni_arg);
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78 }
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79 #endif
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80
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81
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82 void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
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83 Argument jni_arg(jni_offset(), false);
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84 #ifdef _LP64
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85 FloatRegister Rtmp = F0;
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86 __ ldf(FloatRegisterImpl::D, Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
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87 __ store_double_argument(Rtmp, jni_arg);
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88 #else
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89 Register Rtmp = O0;
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90 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
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91 __ store_argument(Rtmp, jni_arg);
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92 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
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93 Argument successor(jni_arg.successor());
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94 __ store_argument(Rtmp, successor);
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95 #endif
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96 }
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97
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98 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
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99 Argument jni_arg(jni_offset(), false);
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100 Argument java_arg( offset(), true);
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101 Register Rtmp1 = O0;
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102 Register Rtmp2 = jni_arg.is_register() ? jni_arg.as_register() : O0;
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103 Register Rtmp3 = G3_scratch;
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104
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105 // the handle for a receiver will never be null
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106 bool do_NULL_check = offset() != 0 || is_static();
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107
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108 Address h_arg = Address(Llocals, Interpreter::local_offset_in_bytes(offset()));
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109 __ ld_ptr(h_arg, Rtmp1);
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110 #ifdef ASSERT
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111 if (TaggedStackInterpreter) {
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112 // check we have the obj and not the tag
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113 Label ok;
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114 __ mov(frame::TagReference, Rtmp3);
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115 __ cmp(Rtmp1, Rtmp3);
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116 __ brx(Assembler::notEqual, true, Assembler::pt, ok);
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117 __ delayed()->nop();
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118 __ stop("Native object passed tag by mistake");
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119 __ bind(ok);
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120 }
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121 #endif // ASSERT
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122 if (!do_NULL_check) {
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123 __ add(h_arg.base(), h_arg.disp(), Rtmp2);
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124 } else {
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125 if (Rtmp1 == Rtmp2)
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126 __ tst(Rtmp1);
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127 else __ addcc(G0, Rtmp1, Rtmp2); // optimize mov/test pair
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128 Label L;
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129 __ brx(Assembler::notZero, true, Assembler::pt, L);
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130 __ delayed()->add(h_arg.base(), h_arg.disp(), Rtmp2);
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131 __ bind(L);
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132 }
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133 __ store_ptr_argument(Rtmp2, jni_arg); // this is often a no-op
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134 }
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135
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136
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137 void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
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138
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139 // generate code to handle arguments
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140 iterate(fingerprint);
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141
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142 // return result handler
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143 AddressLiteral result_handler(Interpreter::result_handler(method()->result_type()));
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144 __ sethi(result_handler, Lscratch);
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145 __ retl();
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146 __ delayed()->add(Lscratch, result_handler.low10(), Lscratch);
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147
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148 __ flush();
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149 }
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150
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151
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152 // Implementation of SignatureHandlerLibrary
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153
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154 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
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155
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156
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157 class SlowSignatureHandler: public NativeSignatureIterator {
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158 private:
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159 address _from;
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160 intptr_t* _to;
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161 intptr_t* _RegArgSignature; // Signature of first Arguments to be passed in Registers
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162 uint _argcount;
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163
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164 enum { // We need to differenciate float from non floats in reg args
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165 non_float = 0,
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166 float_sig = 1,
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167 double_sig = 2,
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168 long_sig = 3
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169 };
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170
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171 #ifdef ASSERT
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172 void verify_tag(frame::Tag t) {
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173 assert(!TaggedStackInterpreter ||
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174 *(intptr_t*)(_from+Interpreter::local_tag_offset_in_bytes(0)) == t, "wrong tag");
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175 }
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176 #endif // ASSERT
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177
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178 virtual void pass_int() {
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179 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
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180 debug_only(verify_tag(frame::TagValue));
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181 _from -= Interpreter::stackElementSize();
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182 add_signature( non_float );
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183 }
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184
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185 virtual void pass_object() {
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186 // pass address of from
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187 intptr_t *from_addr = (intptr_t*)(_from + Interpreter::local_offset_in_bytes(0));
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188 *_to++ = (*from_addr == 0) ? NULL : (intptr_t) from_addr;
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189 debug_only(verify_tag(frame::TagReference));
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190 _from -= Interpreter::stackElementSize();
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191 add_signature( non_float );
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192 }
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193
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194 #ifdef _LP64
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195 virtual void pass_float() {
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196 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
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197 debug_only(verify_tag(frame::TagValue));
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198 _from -= Interpreter::stackElementSize();
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199 add_signature( float_sig );
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200 }
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201
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202 virtual void pass_double() {
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203 *_to++ = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
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204 debug_only(verify_tag(frame::TagValue));
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205 _from -= 2*Interpreter::stackElementSize();
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206 add_signature( double_sig );
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207 }
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208
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209 virtual void pass_long() {
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210 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
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211 debug_only(verify_tag(frame::TagValue));
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212 _to += 1;
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213 _from -= 2*Interpreter::stackElementSize();
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214 add_signature( long_sig );
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215 }
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216 #else
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217 // pass_double() is pass_long() and pass_float() only _LP64
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218 virtual void pass_long() {
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219 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
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220 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
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221 debug_only(verify_tag(frame::TagValue));
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222 _to += 2;
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223 _from -= 2*Interpreter::stackElementSize();
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224 add_signature( non_float );
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225 }
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226 #endif // _LP64
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227
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228 virtual void add_signature( intptr_t sig_type ) {
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229 if ( _argcount < (sizeof (intptr_t))*4 ) {
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230 *_RegArgSignature |= (sig_type << (_argcount*2) );
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231 _argcount++;
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232 }
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233 }
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234
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235
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236 public:
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237 SlowSignatureHandler(methodHandle method, address from, intptr_t* to, intptr_t *RegArgSig) : NativeSignatureIterator(method) {
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238 _from = from;
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239 _to = to;
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240 _RegArgSignature = RegArgSig;
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241 *_RegArgSignature = 0;
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242 _argcount = method->is_static() ? 2 : 1;
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243 }
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244 };
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245
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246
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247 IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(
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248 JavaThread* thread,
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249 methodOopDesc* method,
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250 intptr_t* from,
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251 intptr_t* to ))
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252 methodHandle m(thread, method);
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253 assert(m->is_native(), "sanity check");
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254 // handle arguments
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255 // Warning: We use reg arg slot 00 temporarily to return the RegArgSignature
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256 // back to the code that pops the arguments into the CPU registers
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257 SlowSignatureHandler(m, (address)from, m->is_static() ? to+2 : to+1, to).iterate(UCONST64(-1));
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258 // return result handler
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259 return Interpreter::result_handler(m->result_type());
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260 IRT_END
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