ArchVariant.cpp revision c1a4ab9c313d8a3d12007f2dbef7b5a6fa4ac2ef 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17extern "C" void dvmCompilerTemplateStart(void);
18
19/*
20 * Determine the initial instruction set to be used for this trace.
21 * Later components may decide to change this.
22 */
23JitInstructionSetType dvmCompilerInstructionSet(void)
24{
25    return DALVIK_JIT_THUMB2;
26}
27
28/* First, declare dvmCompiler_TEMPLATE_XXX for each template */
29#define JIT_TEMPLATE(X) extern "C" void dvmCompiler_TEMPLATE_##X();
30#include "../../../template/armv5te-vfp/TemplateOpList.h"
31#undef JIT_TEMPLATE
32
33/* Architecture-specific initializations and checks go here */
34bool dvmCompilerArchVariantInit(void)
35{
36    int i = 0;
37
38    /*
39     * Then, populate the templateEntryOffsets array with the offsets from the
40     * the dvmCompilerTemplateStart symbol for each template.
41     */
42#define JIT_TEMPLATE(X) templateEntryOffsets[i++] = \
43    (intptr_t) dvmCompiler_TEMPLATE_##X - (intptr_t) dvmCompilerTemplateStart;
44#include "../../../template/armv5te-vfp/TemplateOpList.h"
45#undef JIT_TEMPLATE
46
47    /* Target-specific configuration */
48    gDvmJit.jitTableSize = 1 << 12; // 4096
49    gDvmJit.jitTableMask = gDvmJit.jitTableSize - 1;
50    gDvmJit.threshold = 40;
51    gDvmJit.codeCacheSize = 1024*1024;
52
53#if defined(WITH_SELF_VERIFICATION)
54    /* Force into blocking */
55    gDvmJit.blockingMode = true;
56    gDvm.nativeDebuggerActive = true;
57#endif
58
59    /* Codegen-specific assumptions */
60    assert(OFFSETOF_MEMBER(ClassObject, vtable) < 128 &&
61           (OFFSETOF_MEMBER(ClassObject, vtable) & 0x3) == 0);
62    assert(OFFSETOF_MEMBER(ArrayObject, length) < 128 &&
63           (OFFSETOF_MEMBER(ArrayObject, length) & 0x3) == 0);
64    assert(OFFSETOF_MEMBER(ArrayObject, contents) < 256);
65
66    /* Up to 5 args are pushed on top of FP - sizeofStackSaveArea */
67    assert(sizeof(StackSaveArea) < 236);
68
69    /*
70     * EA is calculated by doing "Rn + imm5 << 2". Make sure that the last
71     * offset from the struct is less than 128.
72     */
73    if ((offsetof(Thread, jitToInterpEntries) +
74         sizeof(struct JitToInterpEntries)) >= 128) {
75        ALOGE("Thread.jitToInterpEntries size overflow");
76        dvmAbort();
77    }
78
79    /* FIXME - comment out the following to enable method-based JIT */
80    gDvmJit.disableOpt |= (1 << kMethodJit);
81
82    // Make sure all threads have current values
83    dvmJitUpdateThreadStateAll();
84
85    return true;
86}
87
88int dvmCompilerTargetOptHint(int key)
89{
90    int res;
91    switch (key) {
92        case kMaxHoistDistance:
93            res = 7;
94            break;
95        default:
96            ALOGE("Unknown target optimization hint key: %d",key);
97            res = 0;
98    }
99    return res;
100}
101
102void dvmCompilerGenMemBarrier(CompilationUnit *cUnit, int barrierKind)
103{
104#if ANDROID_SMP != 0
105    ArmLIR *dmb = newLIR1(cUnit, kThumb2Dmb, barrierKind);
106    dmb->defMask = ENCODE_ALL;
107#endif
108}
109