Mercurial > hg > truffle
annotate src/cpu/x86/vm/vtableStubs_x86_32.cpp @ 71:3d62cb85208d
6662967: Optimize I2D conversion on new x86
Summary: Use CVTDQ2PS and CVTDQ2PD for integer values conversions to float and double values on new AMD cpu.
Reviewed-by: sgoldman, never
| author | kvn |
|---|---|
| date | Wed, 19 Mar 2008 15:33:25 -0700 |
| parents | f8236e79048a |
| children | dc7f315e41f7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_vtableStubs_x86_32.cpp.incl" | |
| 27 | |
| 28 // machine-dependent part of VtableStubs: create VtableStub of correct size and | |
| 29 // initialize its code | |
| 30 | |
| 31 #define __ masm-> | |
| 32 | |
| 33 #ifndef PRODUCT | |
| 34 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index); | |
| 35 #endif | |
| 36 | |
| 37 // used by compiler only; may use only caller saved registers rax, rbx, rcx. | |
| 38 // rdx holds first int arg, rsi, rdi, rbp are callee-save & must be preserved. | |
| 39 // Leave receiver in rcx; required behavior when +OptoArgsInRegisters | |
| 40 // is modifed to put first oop in rcx. | |
| 41 // | |
| 42 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { | |
| 43 const int i486_code_length = VtableStub::pd_code_size_limit(true); | |
| 44 VtableStub* s = new(i486_code_length) VtableStub(true, vtable_index); | |
| 45 ResourceMark rm; | |
| 46 CodeBuffer cb(s->entry_point(), i486_code_length); | |
| 47 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 48 | |
| 49 #ifndef PRODUCT | |
| 50 | |
| 51 if (CountCompiledCalls) { | |
| 52 __ increment(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); | |
| 53 } | |
| 54 #endif /* PRODUCT */ | |
| 55 | |
| 56 // get receiver (need to skip return address on top of stack) | |
| 57 assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); | |
| 58 | |
| 59 // get receiver klass | |
| 60 address npe_addr = __ pc(); | |
| 61 __ movl(rax, Address(rcx, oopDesc::klass_offset_in_bytes())); | |
| 62 // compute entry offset (in words) | |
| 63 int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); | |
| 64 #ifndef PRODUCT | |
| 65 if (DebugVtables) { | |
| 66 Label L; | |
| 67 // check offset vs vtable length | |
| 68 __ cmpl(Address(rax, instanceKlass::vtable_length_offset()*wordSize), vtable_index*vtableEntry::size()); | |
| 69 __ jcc(Assembler::greater, L); | |
| 70 __ movl(rbx, vtable_index); | |
| 71 __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), rcx, rbx); | |
| 72 __ bind(L); | |
| 73 } | |
| 74 #endif // PRODUCT | |
| 75 | |
| 76 const Register method = rbx; | |
| 77 | |
| 78 // load methodOop and target address | |
| 79 __ movl(method, Address(rax, entry_offset*wordSize + vtableEntry::method_offset_in_bytes())); | |
| 80 if (DebugVtables) { | |
| 81 Label L; | |
| 82 __ cmpl(method, NULL_WORD); | |
| 83 __ jcc(Assembler::equal, L); | |
| 84 __ cmpl(Address(method, methodOopDesc::from_compiled_offset()), NULL_WORD); | |
| 85 __ jcc(Assembler::notZero, L); | |
| 86 __ stop("Vtable entry is NULL"); | |
| 87 __ bind(L); | |
| 88 } | |
| 89 | |
| 90 // rax,: receiver klass | |
| 91 // method (rbx): methodOop | |
| 92 // rcx: receiver | |
| 93 address ame_addr = __ pc(); | |
| 94 __ jmp( Address(method, methodOopDesc::from_compiled_offset())); | |
| 95 | |
| 96 masm->flush(); | |
| 97 s->set_exception_points(npe_addr, ame_addr); | |
| 98 return s; | |
| 99 } | |
| 100 | |
| 101 | |
| 102 VtableStub* VtableStubs::create_itable_stub(int vtable_index) { | |
| 103 // Note well: pd_code_size_limit is the absolute minimum we can get away with. If you | |
| 104 // add code here, bump the code stub size returned by pd_code_size_limit! | |
| 105 const int i486_code_length = VtableStub::pd_code_size_limit(false); | |
| 106 VtableStub* s = new(i486_code_length) VtableStub(false, vtable_index); | |
| 107 ResourceMark rm; | |
| 108 CodeBuffer cb(s->entry_point(), i486_code_length); | |
| 109 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 110 | |
| 111 // Entry arguments: | |
| 112 // rax,: Interface | |
| 113 // rcx: Receiver | |
| 114 | |
| 115 #ifndef PRODUCT | |
| 116 if (CountCompiledCalls) { | |
| 117 __ increment(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); | |
| 118 } | |
| 119 #endif /* PRODUCT */ | |
| 120 // get receiver (need to skip return address on top of stack) | |
| 121 | |
| 122 assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); | |
| 123 | |
| 124 // get receiver klass (also an implicit null-check) | |
| 125 address npe_addr = __ pc(); | |
| 126 __ movl(rbx, Address(rcx, oopDesc::klass_offset_in_bytes())); | |
| 127 | |
| 128 __ movl(rsi, rbx); // Save klass in free register | |
| 129 // Most registers are in use, so save a few | |
| 130 __ pushl(rdx); | |
| 131 // compute itable entry offset (in words) | |
| 132 const int base = instanceKlass::vtable_start_offset() * wordSize; | |
| 133 assert(vtableEntry::size() * wordSize == 4, "adjust the scaling in the code below"); | |
| 134 __ movl(rdx, Address(rbx, instanceKlass::vtable_length_offset() * wordSize)); // Get length of vtable | |
| 135 __ leal(rbx, Address(rbx, rdx, Address::times_4, base)); | |
| 136 if (HeapWordsPerLong > 1) { | |
| 137 // Round up to align_object_offset boundary | |
| 138 __ round_to(rbx, BytesPerLong); | |
| 139 } | |
| 140 | |
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141 Label hit, next, entry, throw_icce; |
| 0 | 142 |
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143 __ jmpb(entry); |
| 0 | 144 |
| 145 __ bind(next); | |
| 146 __ addl(rbx, itableOffsetEntry::size() * wordSize); | |
| 147 | |
| 148 __ bind(entry); | |
| 149 | |
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150 // If the entry is NULL then we've reached the end of the table |
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151 // without finding the expected interface, so throw an exception |
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152 __ movl(rdx, Address(rbx, itableOffsetEntry::interface_offset_in_bytes())); |
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153 __ testl(rdx, rdx); |
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154 __ jcc(Assembler::zero, throw_icce); |
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155 __ cmpl(rax, rdx); |
| 0 | 156 __ jcc(Assembler::notEqual, next); |
| 157 | |
| 158 // We found a hit, move offset into rbx, | |
| 159 __ movl(rdx, Address(rbx, itableOffsetEntry::offset_offset_in_bytes())); | |
| 160 | |
| 161 // Compute itableMethodEntry. | |
| 162 const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes(); | |
| 163 | |
| 164 // Get methodOop and entrypoint for compiler | |
| 165 const Register method = rbx; | |
| 166 __ movl(method, Address(rsi, rdx, Address::times_1, method_offset)); | |
| 167 | |
| 168 // Restore saved register, before possible trap. | |
| 169 __ popl(rdx); | |
| 170 | |
| 171 // method (rbx): methodOop | |
| 172 // rcx: receiver | |
| 173 | |
| 174 #ifdef ASSERT | |
| 175 if (DebugVtables) { | |
| 176 Label L1; | |
| 177 __ cmpl(method, NULL_WORD); | |
| 178 __ jcc(Assembler::equal, L1); | |
| 179 __ cmpl(Address(method, methodOopDesc::from_compiled_offset()), NULL_WORD); | |
| 180 __ jcc(Assembler::notZero, L1); | |
| 181 __ stop("methodOop is null"); | |
| 182 __ bind(L1); | |
| 183 } | |
| 184 #endif // ASSERT | |
| 185 | |
| 186 address ame_addr = __ pc(); | |
| 187 __ jmp(Address(method, methodOopDesc::from_compiled_offset())); | |
| 188 | |
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189 __ bind(throw_icce); |
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190 // Restore saved register |
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191 __ popl(rdx); |
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192 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
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193 |
| 0 | 194 masm->flush(); |
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195 |
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196 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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197 |
| 0 | 198 s->set_exception_points(npe_addr, ame_addr); |
| 199 return s; | |
| 200 } | |
| 201 | |
| 202 | |
| 203 | |
| 204 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
| 205 if (is_vtable_stub) { | |
| 206 // Vtable stub size | |
| 207 return (DebugVtables ? 210 : 16) + (CountCompiledCalls ? 6 : 0); | |
| 208 } else { | |
| 209 // Itable stub size | |
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210 return (DebugVtables ? 144 : 64) + (CountCompiledCalls ? 6 : 0); |
| 0 | 211 } |
| 212 } | |
| 213 | |
| 214 int VtableStub::pd_code_alignment() { | |
| 215 return wordSize; | |
| 216 } |