1 /*
2  * Copyright (C) 2014 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 #include <string.h>
18 
19 #include "atomic.h"
20 #include "entrypoints/jni/jni_entrypoints.h"
21 #include "entrypoints/quick/quick_alloc_entrypoints.h"
22 #include "entrypoints/quick/quick_default_externs.h"
23 #include "entrypoints/quick/quick_default_init_entrypoints.h"
24 #include "entrypoints/quick/quick_entrypoints.h"
25 #include "entrypoints/entrypoint_utils.h"
26 #include "entrypoints/math_entrypoints.h"
27 #include "entrypoints/runtime_asm_entrypoints.h"
28 #include "interpreter/interpreter.h"
29 
30 namespace art {
31 
32 // Cast entrypoints.
33 extern "C" size_t artInstanceOfFromCode(mirror::Object* obj, mirror::Class* ref_class);
34 
35 // Read barrier entrypoints.
36 // art_quick_read_barrier_mark_regXX uses a non-standard calling
37 // convention: it expects its input in register XX+1 and returns its
38 // result in that same register, and saves and restores all
39 // caller-save registers.
40 extern "C" mirror::Object* art_quick_read_barrier_mark_reg01(mirror::Object*);
41 extern "C" mirror::Object* art_quick_read_barrier_mark_reg02(mirror::Object*);
42 extern "C" mirror::Object* art_quick_read_barrier_mark_reg03(mirror::Object*);
43 extern "C" mirror::Object* art_quick_read_barrier_mark_reg04(mirror::Object*);
44 extern "C" mirror::Object* art_quick_read_barrier_mark_reg05(mirror::Object*);
45 extern "C" mirror::Object* art_quick_read_barrier_mark_reg06(mirror::Object*);
46 extern "C" mirror::Object* art_quick_read_barrier_mark_reg07(mirror::Object*);
47 extern "C" mirror::Object* art_quick_read_barrier_mark_reg08(mirror::Object*);
48 extern "C" mirror::Object* art_quick_read_barrier_mark_reg09(mirror::Object*);
49 extern "C" mirror::Object* art_quick_read_barrier_mark_reg10(mirror::Object*);
50 extern "C" mirror::Object* art_quick_read_barrier_mark_reg11(mirror::Object*);
51 extern "C" mirror::Object* art_quick_read_barrier_mark_reg12(mirror::Object*);
52 extern "C" mirror::Object* art_quick_read_barrier_mark_reg13(mirror::Object*);
53 extern "C" mirror::Object* art_quick_read_barrier_mark_reg17(mirror::Object*);
54 extern "C" mirror::Object* art_quick_read_barrier_mark_reg18(mirror::Object*);
55 extern "C" mirror::Object* art_quick_read_barrier_mark_reg19(mirror::Object*);
56 extern "C" mirror::Object* art_quick_read_barrier_mark_reg20(mirror::Object*);
57 extern "C" mirror::Object* art_quick_read_barrier_mark_reg21(mirror::Object*);
58 extern "C" mirror::Object* art_quick_read_barrier_mark_reg22(mirror::Object*);
59 extern "C" mirror::Object* art_quick_read_barrier_mark_reg29(mirror::Object*);
60 
61 // Math entrypoints.
62 extern int32_t CmpgDouble(double a, double b);
63 extern int32_t CmplDouble(double a, double b);
64 extern int32_t CmpgFloat(float a, float b);
65 extern int32_t CmplFloat(float a, float b);
66 extern "C" int64_t artLmul(int64_t a, int64_t b);
67 extern "C" int64_t artLdiv(int64_t a, int64_t b);
68 extern "C" int64_t artLmod(int64_t a, int64_t b);
69 
70 // Math conversions.
71 extern "C" int32_t __fixsfsi(float op1);      // FLOAT_TO_INT
72 extern "C" int32_t __fixdfsi(double op1);     // DOUBLE_TO_INT
73 extern "C" float __floatdisf(int64_t op1);    // LONG_TO_FLOAT
74 extern "C" double __floatdidf(int64_t op1);   // LONG_TO_DOUBLE
75 extern "C" int64_t __fixsfdi(float op1);      // FLOAT_TO_LONG
76 extern "C" int64_t __fixdfdi(double op1);     // DOUBLE_TO_LONG
77 
78 // Single-precision FP arithmetics.
79 extern "C" float fmodf(float a, float b);      // REM_FLOAT[_2ADDR]
80 
81 // Double-precision FP arithmetics.
82 extern "C" double fmod(double a, double b);     // REM_DOUBLE[_2ADDR]
83 
84 // Long long arithmetics - REM_LONG[_2ADDR] and DIV_LONG[_2ADDR]
85 extern "C" int64_t __divdi3(int64_t, int64_t);
86 extern "C" int64_t __moddi3(int64_t, int64_t);
87 
88 // No read barrier entrypoints for marking registers.
UpdateReadBarrierEntrypoints(QuickEntryPoints * qpoints,bool is_marking)89 void UpdateReadBarrierEntrypoints(QuickEntryPoints* qpoints, bool is_marking) {
90   qpoints->pReadBarrierMarkReg01 = is_marking ? art_quick_read_barrier_mark_reg01 : nullptr;
91   qpoints->pReadBarrierMarkReg02 = is_marking ? art_quick_read_barrier_mark_reg02 : nullptr;
92   qpoints->pReadBarrierMarkReg03 = is_marking ? art_quick_read_barrier_mark_reg03 : nullptr;
93   qpoints->pReadBarrierMarkReg04 = is_marking ? art_quick_read_barrier_mark_reg04 : nullptr;
94   qpoints->pReadBarrierMarkReg05 = is_marking ? art_quick_read_barrier_mark_reg05 : nullptr;
95   qpoints->pReadBarrierMarkReg06 = is_marking ? art_quick_read_barrier_mark_reg06 : nullptr;
96   qpoints->pReadBarrierMarkReg07 = is_marking ? art_quick_read_barrier_mark_reg07 : nullptr;
97   qpoints->pReadBarrierMarkReg08 = is_marking ? art_quick_read_barrier_mark_reg08 : nullptr;
98   qpoints->pReadBarrierMarkReg09 = is_marking ? art_quick_read_barrier_mark_reg09 : nullptr;
99   qpoints->pReadBarrierMarkReg10 = is_marking ? art_quick_read_barrier_mark_reg10 : nullptr;
100   qpoints->pReadBarrierMarkReg11 = is_marking ? art_quick_read_barrier_mark_reg11 : nullptr;
101   qpoints->pReadBarrierMarkReg12 = is_marking ? art_quick_read_barrier_mark_reg12 : nullptr;
102   qpoints->pReadBarrierMarkReg13 = is_marking ? art_quick_read_barrier_mark_reg13 : nullptr;
103   qpoints->pReadBarrierMarkReg17 = is_marking ? art_quick_read_barrier_mark_reg17 : nullptr;
104   qpoints->pReadBarrierMarkReg18 = is_marking ? art_quick_read_barrier_mark_reg18 : nullptr;
105   qpoints->pReadBarrierMarkReg19 = is_marking ? art_quick_read_barrier_mark_reg19 : nullptr;
106   qpoints->pReadBarrierMarkReg20 = is_marking ? art_quick_read_barrier_mark_reg20 : nullptr;
107   qpoints->pReadBarrierMarkReg21 = is_marking ? art_quick_read_barrier_mark_reg21 : nullptr;
108   qpoints->pReadBarrierMarkReg22 = is_marking ? art_quick_read_barrier_mark_reg22 : nullptr;
109   qpoints->pReadBarrierMarkReg29 = is_marking ? art_quick_read_barrier_mark_reg29 : nullptr;
110 }
111 
InitEntryPoints(JniEntryPoints * jpoints,QuickEntryPoints * qpoints)112 void InitEntryPoints(JniEntryPoints* jpoints, QuickEntryPoints* qpoints) {
113   DefaultInitEntryPoints(jpoints, qpoints);
114 
115   // Cast
116   qpoints->pInstanceofNonTrivial = artInstanceOfFromCode;
117   qpoints->pCheckInstanceOf = art_quick_check_instance_of;
118 
119   // Math
120   qpoints->pCmpgDouble = CmpgDouble;
121   qpoints->pCmpgFloat = CmpgFloat;
122   qpoints->pCmplDouble = CmplDouble;
123   qpoints->pCmplFloat = CmplFloat;
124   qpoints->pFmod = fmod;
125   qpoints->pL2d = art_l2d;
126   qpoints->pFmodf = fmodf;
127   qpoints->pL2f = art_l2f;
128   qpoints->pD2iz = art_d2i;
129   qpoints->pF2iz = art_f2i;
130   qpoints->pIdivmod = nullptr;
131   qpoints->pD2l = art_d2l;
132   qpoints->pF2l = art_f2l;
133   qpoints->pLdiv = artLdiv;
134   qpoints->pLmod = artLmod;
135   qpoints->pLmul = artLmul;
136   qpoints->pShlLong = nullptr;
137   qpoints->pShrLong = nullptr;
138   qpoints->pUshrLong = nullptr;
139 
140   // More math.
141   qpoints->pCos = cos;
142   qpoints->pSin = sin;
143   qpoints->pAcos = acos;
144   qpoints->pAsin = asin;
145   qpoints->pAtan = atan;
146   qpoints->pAtan2 = atan2;
147   qpoints->pCbrt = cbrt;
148   qpoints->pCosh = cosh;
149   qpoints->pExp = exp;
150   qpoints->pExpm1 = expm1;
151   qpoints->pHypot = hypot;
152   qpoints->pLog = log;
153   qpoints->pLog10 = log10;
154   qpoints->pNextAfter = nextafter;
155   qpoints->pSinh = sinh;
156   qpoints->pTan = tan;
157   qpoints->pTanh = tanh;
158 
159   // Intrinsics
160   qpoints->pIndexOf = art_quick_indexof;
161   qpoints->pStringCompareTo = art_quick_string_compareto;
162   qpoints->pMemcpy = memcpy;
163 
164   // TODO - use lld/scd instructions for Mips64
165   // Atomic 64-bit load/store
166   qpoints->pA64Load = QuasiAtomic::Read64;
167   qpoints->pA64Store = QuasiAtomic::Write64;
168 
169   // Read barrier.
170   qpoints->pReadBarrierJni = ReadBarrierJni;
171   UpdateReadBarrierEntrypoints(qpoints, /*is_marking*/ false);
172   // Cannot use the following registers to pass arguments:
173   // 0(ZERO), 1(AT), 15(T3), 16(S0), 17(S1), 24(T8), 25(T9), 26(K0), 27(K1), 28(GP), 29(SP), 31(RA).
174   // Note that there are 30 entry points only: 00 for register 1(AT), ..., 29 for register 30(S8).
175   qpoints->pReadBarrierMarkReg00 = nullptr;
176   qpoints->pReadBarrierMarkReg14 = nullptr;
177   qpoints->pReadBarrierMarkReg15 = nullptr;
178   qpoints->pReadBarrierMarkReg16 = nullptr;
179   qpoints->pReadBarrierMarkReg23 = nullptr;
180   qpoints->pReadBarrierMarkReg24 = nullptr;
181   qpoints->pReadBarrierMarkReg25 = nullptr;
182   qpoints->pReadBarrierMarkReg26 = nullptr;
183   qpoints->pReadBarrierMarkReg27 = nullptr;
184   qpoints->pReadBarrierMarkReg28 = nullptr;
185   qpoints->pReadBarrierSlow = artReadBarrierSlow;
186   qpoints->pReadBarrierForRootSlow = artReadBarrierForRootSlow;
187 };
188 
189 }  // namespace art
190