1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/interpreter_x86_32.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,250 @@
1.4 +/*
1.5 + * Copyright 1997-2007 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_32.cpp.incl"
1.30 +
1.31 +#define __ _masm->
1.32 +
1.33 +// Initialize the sentinel used to distinguish an interpreter return address.
1.34 +const int Interpreter::return_sentinel = 0xfeedbeed;
1.35 +
1.36 +//------------------------------------------------------------------------------------------------------------------------
1.37 +
1.38 +address AbstractInterpreterGenerator::generate_slow_signature_handler() {
1.39 + address entry = __ pc();
1.40 + // rbx,: method
1.41 + // rcx: temporary
1.42 + // rdi: pointer to locals
1.43 + // rsp: end of copied parameters area
1.44 + __ movl(rcx, rsp);
1.45 + __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), rbx, rdi, rcx);
1.46 + __ ret(0);
1.47 + return entry;
1.48 +}
1.49 +
1.50 +
1.51 +//
1.52 +// Various method entries (that c++ and asm interpreter agree upon)
1.53 +//------------------------------------------------------------------------------------------------------------------------
1.54 +//
1.55 +//
1.56 +
1.57 +// Empty method, generate a very fast return.
1.58 +
1.59 +address InterpreterGenerator::generate_empty_entry(void) {
1.60 +
1.61 + // rbx,: methodOop
1.62 + // rcx: receiver (unused)
1.63 + // rsi: previous interpreter state (C++ interpreter) must preserve
1.64 + // rsi: sender sp must set sp to this value on return
1.65 +
1.66 + if (!UseFastEmptyMethods) return NULL;
1.67 +
1.68 + address entry_point = __ pc();
1.69 +
1.70 + // If we need a safepoint check, generate full interpreter entry.
1.71 + Label slow_path;
1.72 + ExternalAddress state(SafepointSynchronize::address_of_state());
1.73 + __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1.74 + SafepointSynchronize::_not_synchronized);
1.75 + __ jcc(Assembler::notEqual, slow_path);
1.76 +
1.77 + // do nothing for empty methods (do not even increment invocation counter)
1.78 + // Code: _return
1.79 + // _return
1.80 + // return w/o popping parameters
1.81 + __ popl(rax);
1.82 + __ movl(rsp, rsi);
1.83 + __ jmp(rax);
1.84 +
1.85 + __ bind(slow_path);
1.86 + (void) generate_normal_entry(false);
1.87 + return entry_point;
1.88 +}
1.89 +
1.90 +address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
1.91 +
1.92 + // rbx,: methodOop
1.93 + // rcx: scratrch
1.94 + // rsi: sender sp
1.95 +
1.96 + if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
1.97 +
1.98 + address entry_point = __ pc();
1.99 +
1.100 + // These don't need a safepoint check because they aren't virtually
1.101 + // callable. We won't enter these intrinsics from compiled code.
1.102 + // If in the future we added an intrinsic which was virtually callable
1.103 + // we'd have to worry about how to safepoint so that this code is used.
1.104 +
1.105 + // mathematical functions inlined by compiler
1.106 + // (interpreter must provide identical implementation
1.107 + // in order to avoid monotonicity bugs when switching
1.108 + // from interpreter to compiler in the middle of some
1.109 + // computation)
1.110 + //
1.111 + // stack: [ ret adr ] <-- rsp
1.112 + // [ lo(arg) ]
1.113 + // [ hi(arg) ]
1.114 + //
1.115 +
1.116 + // Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are
1.117 + // native methods. Interpreter::method_kind(...) does a check for
1.118 + // native methods first before checking for intrinsic methods and
1.119 + // thus will never select this entry point. Make sure it is not
1.120 + // called accidentally since the SharedRuntime entry points will
1.121 + // not work for JDK 1.2.
1.122 + //
1.123 + // We no longer need to check for JDK 1.2 since it's EOL'ed.
1.124 + // The following check existed in pre 1.6 implementation,
1.125 + // if (Universe::is_jdk12x_version()) {
1.126 + // __ should_not_reach_here();
1.127 + // }
1.128 + // Universe::is_jdk12x_version() always returns false since
1.129 + // the JDK version is not yet determined when this method is called.
1.130 + // This method is called during interpreter_init() whereas
1.131 + // JDK version is only determined when universe2_init() is called.
1.132 +
1.133 + // Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are
1.134 + // java methods. Interpreter::method_kind(...) will select
1.135 + // this entry point for the corresponding methods in JDK 1.3.
1.136 + // get argument
1.137 + if (TaggedStackInterpreter) {
1.138 + __ pushl(Address(rsp, 3*wordSize)); // push hi (and note rsp -= wordSize)
1.139 + __ pushl(Address(rsp, 2*wordSize)); // push lo
1.140 + __ fld_d(Address(rsp, 0)); // get double in ST0
1.141 + __ addl(rsp, 2*wordSize);
1.142 + } else {
1.143 + __ fld_d(Address(rsp, 1*wordSize));
1.144 + }
1.145 + switch (kind) {
1.146 + case Interpreter::java_lang_math_sin :
1.147 + __ trigfunc('s');
1.148 + break;
1.149 + case Interpreter::java_lang_math_cos :
1.150 + __ trigfunc('c');
1.151 + break;
1.152 + case Interpreter::java_lang_math_tan :
1.153 + __ trigfunc('t');
1.154 + break;
1.155 + case Interpreter::java_lang_math_sqrt:
1.156 + __ fsqrt();
1.157 + break;
1.158 + case Interpreter::java_lang_math_abs:
1.159 + __ fabs();
1.160 + break;
1.161 + case Interpreter::java_lang_math_log:
1.162 + __ flog();
1.163 + // Store to stack to convert 80bit precision back to 64bits
1.164 + __ push_fTOS();
1.165 + __ pop_fTOS();
1.166 + break;
1.167 + case Interpreter::java_lang_math_log10:
1.168 + __ flog10();
1.169 + // Store to stack to convert 80bit precision back to 64bits
1.170 + __ push_fTOS();
1.171 + __ pop_fTOS();
1.172 + break;
1.173 + default :
1.174 + ShouldNotReachHere();
1.175 + }
1.176 +
1.177 + // return double result in xmm0 for interpreter and compilers.
1.178 + if (UseSSE >= 2) {
1.179 + __ subl(rsp, 2*wordSize);
1.180 + __ fstp_d(Address(rsp, 0));
1.181 + __ movdbl(xmm0, Address(rsp, 0));
1.182 + __ addl(rsp, 2*wordSize);
1.183 + }
1.184 +
1.185 + // done, result in FPU ST(0) or XMM0
1.186 + __ popl(rdi); // get return address
1.187 + __ movl(rsp, rsi); // set sp to sender sp
1.188 + __ jmp(rdi);
1.189 +
1.190 + return entry_point;
1.191 +}
1.192 +
1.193 +
1.194 +// Abstract method entry
1.195 +// Attempt to execute abstract method. Throw exception
1.196 +address InterpreterGenerator::generate_abstract_entry(void) {
1.197 +
1.198 + // rbx,: methodOop
1.199 + // rcx: receiver (unused)
1.200 + // rsi: previous interpreter state (C++ interpreter) must preserve
1.201 +
1.202 + // rsi: sender SP
1.203 +
1.204 + address entry_point = __ pc();
1.205 +
1.206 + // abstract method entry
1.207 + // remove return address. Not really needed, since exception handling throws away expression stack
1.208 + __ popl(rbx);
1.209 +
1.210 + // adjust stack to what a normal return would do
1.211 + __ movl(rsp, rsi);
1.212 + // throw exception
1.213 + __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
1.214 + // the call_VM checks for exception, so we should never return here.
1.215 + __ should_not_reach_here();
1.216 +
1.217 + return entry_point;
1.218 +}
1.219 +
1.220 +// This method tells the deoptimizer how big an interpreted frame must be:
1.221 +int AbstractInterpreter::size_activation(methodOop method,
1.222 + int tempcount,
1.223 + int popframe_extra_args,
1.224 + int moncount,
1.225 + int callee_param_count,
1.226 + int callee_locals,
1.227 + bool is_top_frame) {
1.228 + return layout_activation(method,
1.229 + tempcount,
1.230 + popframe_extra_args,
1.231 + moncount,
1.232 + callee_param_count,
1.233 + callee_locals,
1.234 + (frame*) NULL,
1.235 + (frame*) NULL,
1.236 + is_top_frame);
1.237 +}
1.238 +
1.239 +void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) {
1.240 +
1.241 + // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in
1.242 + // the days we had adapter frames. When we deoptimize a situation where a
1.243 + // compiled caller calls a compiled caller will have registers it expects
1.244 + // to survive the call to the callee. If we deoptimize the callee the only
1.245 + // way we can restore these registers is to have the oldest interpreter
1.246 + // frame that we create restore these values. That is what this routine
1.247 + // will accomplish.
1.248 +
1.249 + // At the moment we have modified c2 to not have any callee save registers
1.250 + // so this problem does not exist and this routine is just a place holder.
1.251 +
1.252 + assert(f->is_interpreted_frame(), "must be interpreted");
1.253 +}
