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
17 extern "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 */
dvmCompilerInstructionSet(void)23 JitInstructionSetType 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/armv7-a/TemplateOpList.h"
31 #undef JIT_TEMPLATE
32
33 /* Architecture-specific initializations and checks go here */
dvmCompilerArchVariantInit(void)34 bool 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/armv7-a/TemplateOpList.h"
45 #undef JIT_TEMPLATE
46
47 /* Target-specific configuration */
48 gDvmJit.jitTableSize = 1 << 12; // 4096
49 gDvmJit.jitTableMask = gDvmJit.jitTableSize - 1;
50 if (gDvmJit.threshold == 0) {
51 gDvmJit.threshold = 40;
52 }
53 if (gDvmJit.codeCacheSize == DEFAULT_CODE_CACHE_SIZE) {
54 gDvmJit.codeCacheSize = 1500 * 1024;
55 } else if ((gDvmJit.codeCacheSize == 0) && (gDvm.executionMode == kExecutionModeJit)) {
56 gDvm.executionMode = kExecutionModeInterpFast;
57 }
58 /* Hard limit for Arm of 2M */
59 assert(gDvmJit.codeCacheSize <= 2 * 1024 * 1024);
60
61 #if defined(WITH_SELF_VERIFICATION)
62 /* Force into blocking */
63 gDvmJit.blockingMode = true;
64 gDvm.nativeDebuggerActive = true;
65 #endif
66
67 /* Codegen-specific assumptions */
68 assert(OFFSETOF_MEMBER(ClassObject, vtable) < 128 &&
69 (OFFSETOF_MEMBER(ClassObject, vtable) & 0x3) == 0);
70 assert(OFFSETOF_MEMBER(ArrayObject, length) < 128 &&
71 (OFFSETOF_MEMBER(ArrayObject, length) & 0x3) == 0);
72 assert(OFFSETOF_MEMBER(ArrayObject, contents) < 256);
73
74 /* Up to 5 args are pushed on top of FP - sizeofStackSaveArea */
75 assert(sizeof(StackSaveArea) < 236);
76
77 /*
78 * EA is calculated by doing "Rn + imm5 << 2". Make sure that the last
79 * offset from the struct is less than 128.
80 */
81 if ((offsetof(Thread, jitToInterpEntries) +
82 sizeof(struct JitToInterpEntries)) >= 128) {
83 ALOGE("Thread.jitToInterpEntries size overflow");
84 dvmAbort();
85 }
86
87 /* FIXME - comment out the following to enable method-based JIT */
88 gDvmJit.disableOpt |= (1 << kMethodJit);
89
90 // Make sure all threads have current values
91 dvmJitUpdateThreadStateAll();
92
93 return true;
94 }
95
dvmCompilerTargetOptHint(int key)96 int dvmCompilerTargetOptHint(int key)
97 {
98 int res;
99 switch (key) {
100 case kMaxHoistDistance:
101 res = 7;
102 break;
103 default:
104 ALOGE("Unknown target optimization hint key: %d",key);
105 res = 0;
106 }
107 return res;
108 }
109
dvmCompilerGenMemBarrier(CompilationUnit * cUnit,int barrierKind)110 void dvmCompilerGenMemBarrier(CompilationUnit *cUnit, int barrierKind)
111 {
112 #if ANDROID_SMP != 0
113 ArmLIR *dmb = newLIR1(cUnit, kThumb2Dmb, barrierKind);
114 dmb->defMask = ENCODE_ALL;
115 #endif
116 }
117