1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/interpreter_x86_64.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,459 @@
1.4 +/*
1.5 + * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "incls/_precompiled.incl"
1.29 +#include "incls/_interpreter_x86_64.cpp.incl"
1.30 +
1.31 +#define __ _masm->
1.32 +
1.33 +
1.34 +#ifdef _WIN64
1.35 +address AbstractInterpreterGenerator::generate_slow_signature_handler() {
1.36 + address entry = __ pc();
1.37 +
1.38 + // rbx: method
1.39 + // r14: pointer to locals
1.40 + // c_rarg3: first stack arg - wordSize
1.41 + __ movq(c_rarg3, rsp);
1.42 + // adjust rsp
1.43 + __ subq(rsp, 4 * wordSize);
1.44 + __ call_VM(noreg,
1.45 + CAST_FROM_FN_PTR(address,
1.46 + InterpreterRuntime::slow_signature_handler),
1.47 + rbx, r14, c_rarg3);
1.48 +
1.49 + // rax: result handler
1.50 +
1.51 + // Stack layout:
1.52 + // rsp: 3 integer or float args (if static first is unused)
1.53 + // 1 float/double identifiers
1.54 + // return address
1.55 + // stack args
1.56 + // garbage
1.57 + // expression stack bottom
1.58 + // bcp (NULL)
1.59 + // ...
1.60 +
1.61 + // Do FP first so we can use c_rarg3 as temp
1.62 + __ movl(c_rarg3, Address(rsp, 3 * wordSize)); // float/double identifiers
1.63 +
1.64 + for ( int i= 0; i < Argument::n_int_register_parameters_c-1; i++ ) {
1.65 + XMMRegister floatreg = as_XMMRegister(i+1);
1.66 + Label isfloatordouble, isdouble, next;
1.67 +
1.68 + __ testl(c_rarg3, 1 << (i*2)); // Float or Double?
1.69 + __ jcc(Assembler::notZero, isfloatordouble);
1.70 +
1.71 + // Do Int register here
1.72 + switch ( i ) {
1.73 + case 0:
1.74 + __ movl(rscratch1, Address(rbx, methodOopDesc::access_flags_offset()));
1.75 + __ testl(rscratch1, JVM_ACC_STATIC);
1.76 + __ cmovq(Assembler::zero, c_rarg1, Address(rsp, 0));
1.77 + break;
1.78 + case 1:
1.79 + __ movq(c_rarg2, Address(rsp, wordSize));
1.80 + break;
1.81 + case 2:
1.82 + __ movq(c_rarg3, Address(rsp, 2 * wordSize));
1.83 + break;
1.84 + default:
1.85 + break;
1.86 + }
1.87 +
1.88 + __ jmp (next);
1.89 +
1.90 + __ bind(isfloatordouble);
1.91 + __ testl(c_rarg3, 1 << ((i*2)+1)); // Double?
1.92 + __ jcc(Assembler::notZero, isdouble);
1.93 +
1.94 +// Do Float Here
1.95 + __ movflt(floatreg, Address(rsp, i * wordSize));
1.96 + __ jmp(next);
1.97 +
1.98 +// Do Double here
1.99 + __ bind(isdouble);
1.100 + __ movdbl(floatreg, Address(rsp, i * wordSize));
1.101 +
1.102 + __ bind(next);
1.103 + }
1.104 +
1.105 +
1.106 + // restore rsp
1.107 + __ addq(rsp, 4 * wordSize);
1.108 +
1.109 + __ ret(0);
1.110 +
1.111 + return entry;
1.112 +}
1.113 +#else
1.114 +address AbstractInterpreterGenerator::generate_slow_signature_handler() {
1.115 + address entry = __ pc();
1.116 +
1.117 + // rbx: method
1.118 + // r14: pointer to locals
1.119 + // c_rarg3: first stack arg - wordSize
1.120 + __ movq(c_rarg3, rsp);
1.121 + // adjust rsp
1.122 + __ subq(rsp, 14 * wordSize);
1.123 + __ call_VM(noreg,
1.124 + CAST_FROM_FN_PTR(address,
1.125 + InterpreterRuntime::slow_signature_handler),
1.126 + rbx, r14, c_rarg3);
1.127 +
1.128 + // rax: result handler
1.129 +
1.130 + // Stack layout:
1.131 + // rsp: 5 integer args (if static first is unused)
1.132 + // 1 float/double identifiers
1.133 + // 8 double args
1.134 + // return address
1.135 + // stack args
1.136 + // garbage
1.137 + // expression stack bottom
1.138 + // bcp (NULL)
1.139 + // ...
1.140 +
1.141 + // Do FP first so we can use c_rarg3 as temp
1.142 + __ movl(c_rarg3, Address(rsp, 5 * wordSize)); // float/double identifiers
1.143 +
1.144 + for (int i = 0; i < Argument::n_float_register_parameters_c; i++) {
1.145 + const XMMRegister r = as_XMMRegister(i);
1.146 +
1.147 + Label d, done;
1.148 +
1.149 + __ testl(c_rarg3, 1 << i);
1.150 + __ jcc(Assembler::notZero, d);
1.151 + __ movflt(r, Address(rsp, (6 + i) * wordSize));
1.152 + __ jmp(done);
1.153 + __ bind(d);
1.154 + __ movdbl(r, Address(rsp, (6 + i) * wordSize));
1.155 + __ bind(done);
1.156 + }
1.157 +
1.158 + // Now handle integrals. Only do c_rarg1 if not static.
1.159 + __ movl(c_rarg3, Address(rbx, methodOopDesc::access_flags_offset()));
1.160 + __ testl(c_rarg3, JVM_ACC_STATIC);
1.161 + __ cmovq(Assembler::zero, c_rarg1, Address(rsp, 0));
1.162 +
1.163 + __ movq(c_rarg2, Address(rsp, wordSize));
1.164 + __ movq(c_rarg3, Address(rsp, 2 * wordSize));
1.165 + __ movq(c_rarg4, Address(rsp, 3 * wordSize));
1.166 + __ movq(c_rarg5, Address(rsp, 4 * wordSize));
1.167 +
1.168 + // restore rsp
1.169 + __ addq(rsp, 14 * wordSize);
1.170 +
1.171 + __ ret(0);
1.172 +
1.173 + return entry;
1.174 +}
1.175 +#endif
1.176 +
1.177 +
1.178 +//
1.179 +// Various method entries
1.180 +//
1.181 +
1.182 +address InterpreterGenerator::generate_math_entry(
1.183 + AbstractInterpreter::MethodKind kind) {
1.184 + // rbx: methodOop
1.185 +
1.186 + if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
1.187 +
1.188 + assert(kind == Interpreter::java_lang_math_sqrt,
1.189 + "Other intrinsics are not special");
1.190 +
1.191 + address entry_point = __ pc();
1.192 +
1.193 + // These don't need a safepoint check because they aren't virtually
1.194 + // callable. We won't enter these intrinsics from compiled code.
1.195 + // If in the future we added an intrinsic which was virtually callable
1.196 + // we'd have to worry about how to safepoint so that this code is used.
1.197 +
1.198 + // mathematical functions inlined by compiler
1.199 + // (interpreter must provide identical implementation
1.200 + // in order to avoid monotonicity bugs when switching
1.201 + // from interpreter to compiler in the middle of some
1.202 + // computation)
1.203 +
1.204 + // Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are
1.205 + // native methods. Interpreter::method_kind(...) does a check for
1.206 + // native methods first before checking for intrinsic methods and
1.207 + // thus will never select this entry point. Make sure it is not
1.208 + // called accidentally since the SharedRuntime entry points will
1.209 + // not work for JDK 1.2.
1.210 + //
1.211 + // We no longer need to check for JDK 1.2 since it's EOL'ed.
1.212 + // The following check existed in pre 1.6 implementation,
1.213 + // if (Universe::is_jdk12x_version()) {
1.214 + // __ should_not_reach_here();
1.215 + // }
1.216 + // Universe::is_jdk12x_version() always returns false since
1.217 + // the JDK version is not yet determined when this method is called.
1.218 + // This method is called during interpreter_init() whereas
1.219 + // JDK version is only determined when universe2_init() is called.
1.220 +
1.221 + // Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are
1.222 + // java methods. Interpreter::method_kind(...) will select
1.223 + // this entry point for the corresponding methods in JDK 1.3.
1.224 + __ sqrtsd(xmm0, Address(rsp, wordSize));
1.225 +
1.226 + __ popq(rax);
1.227 + __ movq(rsp, r13);
1.228 + __ jmp(rax);
1.229 +
1.230 + return entry_point;
1.231 +}
1.232 +
1.233 +
1.234 +// Abstract method entry
1.235 +// Attempt to execute abstract method. Throw exception
1.236 +address InterpreterGenerator::generate_abstract_entry(void) {
1.237 + // rbx: methodOop
1.238 + // r13: sender SP
1.239 +
1.240 + address entry_point = __ pc();
1.241 +
1.242 + // abstract method entry
1.243 + // remove return address. Not really needed, since exception
1.244 + // handling throws away expression stack
1.245 + __ popq(rbx);
1.246 +
1.247 + // adjust stack to what a normal return would do
1.248 + __ movq(rsp, r13);
1.249 +
1.250 + // throw exception
1.251 + __ call_VM(noreg, CAST_FROM_FN_PTR(address,
1.252 + InterpreterRuntime::throw_AbstractMethodError));
1.253 + // the call_VM checks for exception, so we should never return here.
1.254 + __ should_not_reach_here();
1.255 +
1.256 + return entry_point;
1.257 +}
1.258 +
1.259 +
1.260 +// Empty method, generate a very fast return.
1.261 +
1.262 +address InterpreterGenerator::generate_empty_entry(void) {
1.263 + // rbx: methodOop
1.264 + // r13: sender sp must set sp to this value on return
1.265 +
1.266 + if (!UseFastEmptyMethods) {
1.267 + return NULL;
1.268 + }
1.269 +
1.270 + address entry_point = __ pc();
1.271 +
1.272 + // If we need a safepoint check, generate full interpreter entry.
1.273 + Label slow_path;
1.274 + __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1.275 + SafepointSynchronize::_not_synchronized);
1.276 + __ jcc(Assembler::notEqual, slow_path);
1.277 +
1.278 + // do nothing for empty methods (do not even increment invocation counter)
1.279 + // Code: _return
1.280 + // _return
1.281 + // return w/o popping parameters
1.282 + __ popq(rax);
1.283 + __ movq(rsp, r13);
1.284 + __ jmp(rax);
1.285 +
1.286 + __ bind(slow_path);
1.287 + (void) generate_normal_entry(false);
1.288 + return entry_point;
1.289 +
1.290 +}
1.291 +
1.292 +// Call an accessor method (assuming it is resolved, otherwise drop
1.293 +// into vanilla (slow path) entry
1.294 +address InterpreterGenerator::generate_accessor_entry(void) {
1.295 + // rbx: methodOop
1.296 +
1.297 + // r13: senderSP must preserver for slow path, set SP to it on fast path
1.298 +
1.299 + address entry_point = __ pc();
1.300 + Label xreturn_path;
1.301 +
1.302 + // do fastpath for resolved accessor methods
1.303 + if (UseFastAccessorMethods) {
1.304 + // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites
1.305 + // thereof; parameter size = 1
1.306 + // Note: We can only use this code if the getfield has been resolved
1.307 + // and if we don't have a null-pointer exception => check for
1.308 + // these conditions first and use slow path if necessary.
1.309 + Label slow_path;
1.310 + // If we need a safepoint check, generate full interpreter entry.
1.311 + __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1.312 + SafepointSynchronize::_not_synchronized);
1.313 +
1.314 + __ jcc(Assembler::notEqual, slow_path);
1.315 + // rbx: method
1.316 + __ movq(rax, Address(rsp, wordSize));
1.317 +
1.318 + // check if local 0 != NULL and read field
1.319 + __ testq(rax, rax);
1.320 + __ jcc(Assembler::zero, slow_path);
1.321 +
1.322 + __ movq(rdi, Address(rbx, methodOopDesc::constants_offset()));
1.323 + // read first instruction word and extract bytecode @ 1 and index @ 2
1.324 + __ movq(rdx, Address(rbx, methodOopDesc::const_offset()));
1.325 + __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
1.326 + // Shift codes right to get the index on the right.
1.327 + // The bytecode fetched looks like <index><0xb4><0x2a>
1.328 + __ shrl(rdx, 2 * BitsPerByte);
1.329 + __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
1.330 + __ movq(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes()));
1.331 +
1.332 + // rax: local 0
1.333 + // rbx: method
1.334 + // rdx: constant pool cache index
1.335 + // rdi: constant pool cache
1.336 +
1.337 + // check if getfield has been resolved and read constant pool cache entry
1.338 + // check the validity of the cache entry by testing whether _indices field
1.339 + // contains Bytecode::_getfield in b1 byte.
1.340 + assert(in_words(ConstantPoolCacheEntry::size()) == 4,
1.341 + "adjust shift below");
1.342 + __ movl(rcx,
1.343 + Address(rdi,
1.344 + rdx,
1.345 + Address::times_8,
1.346 + constantPoolCacheOopDesc::base_offset() +
1.347 + ConstantPoolCacheEntry::indices_offset()));
1.348 + __ shrl(rcx, 2 * BitsPerByte);
1.349 + __ andl(rcx, 0xFF);
1.350 + __ cmpl(rcx, Bytecodes::_getfield);
1.351 + __ jcc(Assembler::notEqual, slow_path);
1.352 +
1.353 + // Note: constant pool entry is not valid before bytecode is resolved
1.354 + __ movq(rcx,
1.355 + Address(rdi,
1.356 + rdx,
1.357 + Address::times_8,
1.358 + constantPoolCacheOopDesc::base_offset() +
1.359 + ConstantPoolCacheEntry::f2_offset()));
1.360 + // edx: flags
1.361 + __ movl(rdx,
1.362 + Address(rdi,
1.363 + rdx,
1.364 + Address::times_8,
1.365 + constantPoolCacheOopDesc::base_offset() +
1.366 + ConstantPoolCacheEntry::flags_offset()));
1.367 +
1.368 + Label notObj, notInt, notByte, notShort;
1.369 + const Address field_address(rax, rcx, Address::times_1);
1.370 +
1.371 + // Need to differentiate between igetfield, agetfield, bgetfield etc.
1.372 + // because they are different sizes.
1.373 + // Use the type from the constant pool cache
1.374 + __ shrl(rdx, ConstantPoolCacheEntry::tosBits);
1.375 + // Make sure we don't need to mask edx for tosBits after the above shift
1.376 + ConstantPoolCacheEntry::verify_tosBits();
1.377 +
1.378 + __ cmpl(rdx, atos);
1.379 + __ jcc(Assembler::notEqual, notObj);
1.380 + // atos
1.381 + __ movq(rax, field_address);
1.382 + __ jmp(xreturn_path);
1.383 +
1.384 + __ bind(notObj);
1.385 + __ cmpl(rdx, itos);
1.386 + __ jcc(Assembler::notEqual, notInt);
1.387 + // itos
1.388 + __ movl(rax, field_address);
1.389 + __ jmp(xreturn_path);
1.390 +
1.391 + __ bind(notInt);
1.392 + __ cmpl(rdx, btos);
1.393 + __ jcc(Assembler::notEqual, notByte);
1.394 + // btos
1.395 + __ load_signed_byte(rax, field_address);
1.396 + __ jmp(xreturn_path);
1.397 +
1.398 + __ bind(notByte);
1.399 + __ cmpl(rdx, stos);
1.400 + __ jcc(Assembler::notEqual, notShort);
1.401 + // stos
1.402 + __ load_signed_word(rax, field_address);
1.403 + __ jmp(xreturn_path);
1.404 +
1.405 + __ bind(notShort);
1.406 +#ifdef ASSERT
1.407 + Label okay;
1.408 + __ cmpl(rdx, ctos);
1.409 + __ jcc(Assembler::equal, okay);
1.410 + __ stop("what type is this?");
1.411 + __ bind(okay);
1.412 +#endif
1.413 + // ctos
1.414 + __ load_unsigned_word(rax, field_address);
1.415 +
1.416 + __ bind(xreturn_path);
1.417 +
1.418 + // _ireturn/_areturn
1.419 + __ popq(rdi);
1.420 + __ movq(rsp, r13);
1.421 + __ jmp(rdi);
1.422 + __ ret(0);
1.423 +
1.424 + // generate a vanilla interpreter entry as the slow path
1.425 + __ bind(slow_path);
1.426 + (void) generate_normal_entry(false);
1.427 + } else {
1.428 + (void) generate_normal_entry(false);
1.429 + }
1.430 +
1.431 + return entry_point;
1.432 +}
1.433 +
1.434 +// This method tells the deoptimizer how big an interpreted frame must be:
1.435 +int AbstractInterpreter::size_activation(methodOop method,
1.436 + int tempcount,
1.437 + int popframe_extra_args,
1.438 + int moncount,
1.439 + int callee_param_count,
1.440 + int callee_locals,
1.441 + bool is_top_frame) {
1.442 + return layout_activation(method,
1.443 + tempcount, popframe_extra_args, moncount,
1.444 + callee_param_count, callee_locals,
1.445 + (frame*) NULL, (frame*) NULL, is_top_frame);
1.446 +}
1.447 +
1.448 +void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) {
1.449 +
1.450 + // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in
1.451 + // the days we had adapter frames. When we deoptimize a situation where a
1.452 + // compiled caller calls a compiled caller will have registers it expects
1.453 + // to survive the call to the callee. If we deoptimize the callee the only
1.454 + // way we can restore these registers is to have the oldest interpreter
1.455 + // frame that we create restore these values. That is what this routine
1.456 + // will accomplish.
1.457 +
1.458 + // At the moment we have modified c2 to not have any callee save registers
1.459 + // so this problem does not exist and this routine is just a place holder.
1.460 +
1.461 + assert(f->is_interpreted_frame(), "must be interpreted");
1.462 +}
