Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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 | |
Nicolas Geoffray | f3e2cc4 | 2014-02-18 18:37:26 +0000 | [diff] [blame] | 17 | #include <string> |
| 18 | #include <inttypes.h> |
| 19 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 20 | #include "codegen_x86.h" |
| 21 | #include "dex/compiler_internals.h" |
| 22 | #include "dex/quick/mir_to_lir-inl.h" |
Mark Mendell | e19c91f | 2014-02-25 08:19:08 -0800 | [diff] [blame] | 23 | #include "mirror/array.h" |
| 24 | #include "mirror/string.h" |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 25 | #include "x86_lir.h" |
| 26 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 27 | namespace art { |
| 28 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 29 | static const RegStorage core_regs_arr[] = { |
| 30 | rs_rAX, rs_rCX, rs_rDX, rs_rBX, rs_rX86_SP, rs_rBP, rs_rSI, rs_rDI |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 31 | #ifdef TARGET_REX_SUPPORT |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 32 | rs_r8, rs_r9, rs_r10, rs_r11, rs_r12, rs_r13, rs_r14, rs_r15 |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 33 | #endif |
| 34 | }; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 35 | static const RegStorage sp_regs_arr[] = { |
| 36 | rs_fr0, rs_fr1, rs_fr2, rs_fr3, rs_fr4, rs_fr5, rs_fr6, rs_fr7, |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 37 | #ifdef TARGET_REX_SUPPORT |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 38 | rs_fr8, rs_fr9, rs_fr10, rs_fr11, rs_fr12, rs_fr13, rs_fr14, rs_fr15 |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 39 | #endif |
| 40 | }; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 41 | static const RegStorage dp_regs_arr[] = { |
| 42 | rs_dr0, rs_dr1, rs_dr2, rs_dr3, rs_dr4, rs_dr5, rs_dr6, rs_dr7, |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 43 | #ifdef TARGET_REX_SUPPORT |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 44 | rs_dr8, rs_dr9, rs_dr10, rs_dr11, rs_dr12, rs_dr13, rs_dr14, rs_dr15 |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 45 | #endif |
| 46 | }; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 47 | static const RegStorage reserved_regs_arr[] = {rs_rX86_SP}; |
| 48 | static const RegStorage core_temps_arr[] = {rs_rAX, rs_rCX, rs_rDX, rs_rBX}; |
| 49 | static const RegStorage sp_temps_arr[] = { |
| 50 | rs_fr0, rs_fr1, rs_fr2, rs_fr3, rs_fr4, rs_fr5, rs_fr6, rs_fr7, |
| 51 | #ifdef TARGET_REX_SUPPORT |
| 52 | rs_fr8, rs_fr9, rs_fr10, rs_fr11, rs_fr12, rs_fr13, rs_fr14, rs_fr15 |
| 53 | #endif |
| 54 | }; |
| 55 | static const RegStorage dp_temps_arr[] = { |
| 56 | rs_dr0, rs_dr1, rs_dr2, rs_dr3, rs_dr4, rs_dr5, rs_dr6, rs_dr7, |
| 57 | #ifdef TARGET_REX_SUPPORT |
| 58 | rs_dr8, rs_dr9, rs_dr10, rs_dr11, rs_dr12, rs_dr13, rs_dr14, rs_dr15 |
| 59 | #endif |
| 60 | }; |
| 61 | |
| 62 | static const std::vector<RegStorage> core_regs(core_regs_arr, |
| 63 | core_regs_arr + sizeof(core_regs_arr) / sizeof(core_regs_arr[0])); |
| 64 | static const std::vector<RegStorage> sp_regs(sp_regs_arr, |
| 65 | sp_regs_arr + sizeof(sp_regs_arr) / sizeof(sp_regs_arr[0])); |
| 66 | static const std::vector<RegStorage> dp_regs(dp_regs_arr, |
| 67 | dp_regs_arr + sizeof(dp_regs_arr) / sizeof(dp_regs_arr[0])); |
| 68 | static const std::vector<RegStorage> reserved_regs(reserved_regs_arr, |
| 69 | reserved_regs_arr + sizeof(reserved_regs_arr) / sizeof(reserved_regs_arr[0])); |
| 70 | static const std::vector<RegStorage> core_temps(core_temps_arr, |
| 71 | core_temps_arr + sizeof(core_temps_arr) / sizeof(core_temps_arr[0])); |
| 72 | static const std::vector<RegStorage> sp_temps(sp_temps_arr, |
| 73 | sp_temps_arr + sizeof(sp_temps_arr) / sizeof(sp_temps_arr[0])); |
| 74 | static const std::vector<RegStorage> dp_temps(dp_temps_arr, |
| 75 | dp_temps_arr + sizeof(dp_temps_arr) / sizeof(dp_temps_arr[0])); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 76 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 77 | RegLocation X86Mir2Lir::LocCReturn() { |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 78 | return x86_loc_c_return; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 79 | } |
| 80 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 81 | RegLocation X86Mir2Lir::LocCReturnWide() { |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 82 | return x86_loc_c_return_wide; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 83 | } |
| 84 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 85 | RegLocation X86Mir2Lir::LocCReturnFloat() { |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 86 | return x86_loc_c_return_float; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 87 | } |
| 88 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 89 | RegLocation X86Mir2Lir::LocCReturnDouble() { |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 90 | return x86_loc_c_return_double; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | // Return a target-dependent special register. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 94 | RegStorage X86Mir2Lir::TargetReg(SpecialTargetRegister reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 95 | RegStorage res_reg = RegStorage::InvalidReg(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 96 | switch (reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 97 | case kSelf: res_reg = RegStorage::InvalidReg(); break; |
| 98 | case kSuspend: res_reg = RegStorage::InvalidReg(); break; |
| 99 | case kLr: res_reg = RegStorage::InvalidReg(); break; |
| 100 | case kPc: res_reg = RegStorage::InvalidReg(); break; |
| 101 | case kSp: res_reg = rs_rX86_SP; break; |
| 102 | case kArg0: res_reg = rs_rX86_ARG0; break; |
| 103 | case kArg1: res_reg = rs_rX86_ARG1; break; |
| 104 | case kArg2: res_reg = rs_rX86_ARG2; break; |
| 105 | case kArg3: res_reg = rs_rX86_ARG3; break; |
| 106 | case kFArg0: res_reg = rs_rX86_FARG0; break; |
| 107 | case kFArg1: res_reg = rs_rX86_FARG1; break; |
| 108 | case kFArg2: res_reg = rs_rX86_FARG2; break; |
| 109 | case kFArg3: res_reg = rs_rX86_FARG3; break; |
| 110 | case kRet0: res_reg = rs_rX86_RET0; break; |
| 111 | case kRet1: res_reg = rs_rX86_RET1; break; |
| 112 | case kInvokeTgt: res_reg = rs_rX86_INVOKE_TGT; break; |
| 113 | case kHiddenArg: res_reg = rs_rAX; break; |
| 114 | case kHiddenFpArg: res_reg = rs_fr0; break; |
| 115 | case kCount: res_reg = rs_rX86_COUNT; break; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 116 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 117 | return res_reg; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 118 | } |
| 119 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 120 | RegStorage X86Mir2Lir::GetArgMappingToPhysicalReg(int arg_num) { |
Razvan A Lupusoru | 3bc0174 | 2014-02-06 13:18:43 -0800 | [diff] [blame] | 121 | // For the 32-bit internal ABI, the first 3 arguments are passed in registers. |
| 122 | // TODO: This is not 64-bit compliant and depends on new internal ABI. |
| 123 | switch (arg_num) { |
| 124 | case 0: |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 125 | return rs_rX86_ARG1; |
Razvan A Lupusoru | 3bc0174 | 2014-02-06 13:18:43 -0800 | [diff] [blame] | 126 | case 1: |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 127 | return rs_rX86_ARG2; |
Razvan A Lupusoru | 3bc0174 | 2014-02-06 13:18:43 -0800 | [diff] [blame] | 128 | case 2: |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 129 | return rs_rX86_ARG3; |
Razvan A Lupusoru | 3bc0174 | 2014-02-06 13:18:43 -0800 | [diff] [blame] | 130 | default: |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 131 | return RegStorage::InvalidReg(); |
Razvan A Lupusoru | 3bc0174 | 2014-02-06 13:18:43 -0800 | [diff] [blame] | 132 | } |
| 133 | } |
| 134 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 135 | /* |
| 136 | * Decode the register id. |
| 137 | */ |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 138 | uint64_t X86Mir2Lir::GetRegMaskCommon(RegStorage reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 139 | uint64_t seed; |
| 140 | int shift; |
| 141 | int reg_id; |
| 142 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 143 | reg_id = reg.GetRegNum(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 144 | /* Double registers in x86 are just a single FP register */ |
| 145 | seed = 1; |
| 146 | /* FP register starts at bit position 16 */ |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 147 | shift = reg.IsFloat() ? kX86FPReg0 : 0; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 148 | /* Expand the double register id into single offset */ |
| 149 | shift += reg_id; |
| 150 | return (seed << shift); |
| 151 | } |
| 152 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 153 | uint64_t X86Mir2Lir::GetPCUseDefEncoding() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 154 | /* |
| 155 | * FIXME: might make sense to use a virtual resource encoding bit for pc. Might be |
| 156 | * able to clean up some of the x86/Arm_Mips differences |
| 157 | */ |
| 158 | LOG(FATAL) << "Unexpected call to GetPCUseDefEncoding for x86"; |
| 159 | return 0ULL; |
| 160 | } |
| 161 | |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 162 | void X86Mir2Lir::SetupTargetResourceMasks(LIR* lir, uint64_t flags) { |
Dmitry Petrochenko | 6a58cb1 | 2014-04-02 17:27:59 +0700 | [diff] [blame] | 163 | DCHECK(cu_->instruction_set == kX86 || cu_->instruction_set == kX86_64); |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 164 | DCHECK(!lir->flags.use_def_invalid); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 165 | |
| 166 | // X86-specific resource map setup here. |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 167 | if (flags & REG_USE_SP) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 168 | lir->u.m.use_mask |= ENCODE_X86_REG_SP; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | if (flags & REG_DEF_SP) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 172 | lir->u.m.def_mask |= ENCODE_X86_REG_SP; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | if (flags & REG_DEFA) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 176 | SetupRegMask(&lir->u.m.def_mask, rs_rAX.GetReg()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | if (flags & REG_DEFD) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 180 | SetupRegMask(&lir->u.m.def_mask, rs_rDX.GetReg()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 181 | } |
| 182 | if (flags & REG_USEA) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 183 | SetupRegMask(&lir->u.m.use_mask, rs_rAX.GetReg()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | if (flags & REG_USEC) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 187 | SetupRegMask(&lir->u.m.use_mask, rs_rCX.GetReg()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | if (flags & REG_USED) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 191 | SetupRegMask(&lir->u.m.use_mask, rs_rDX.GetReg()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 192 | } |
Vladimir Marko | 70b797d | 2013-12-03 15:25:24 +0000 | [diff] [blame] | 193 | |
| 194 | if (flags & REG_USEB) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 195 | SetupRegMask(&lir->u.m.use_mask, rs_rBX.GetReg()); |
Vladimir Marko | 70b797d | 2013-12-03 15:25:24 +0000 | [diff] [blame] | 196 | } |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 197 | |
| 198 | // Fixup hard to describe instruction: Uses rAX, rCX, rDI; sets rDI. |
| 199 | if (lir->opcode == kX86RepneScasw) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 200 | SetupRegMask(&lir->u.m.use_mask, rs_rAX.GetReg()); |
| 201 | SetupRegMask(&lir->u.m.use_mask, rs_rCX.GetReg()); |
| 202 | SetupRegMask(&lir->u.m.use_mask, rs_rDI.GetReg()); |
| 203 | SetupRegMask(&lir->u.m.def_mask, rs_rDI.GetReg()); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 204 | } |
Serguei Katkov | e90501d | 2014-03-12 15:56:54 +0700 | [diff] [blame] | 205 | |
| 206 | if (flags & USE_FP_STACK) { |
| 207 | lir->u.m.use_mask |= ENCODE_X86_FP_STACK; |
| 208 | lir->u.m.def_mask |= ENCODE_X86_FP_STACK; |
| 209 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | /* For dumping instructions */ |
| 213 | static const char* x86RegName[] = { |
| 214 | "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", |
| 215 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
| 216 | }; |
| 217 | |
| 218 | static const char* x86CondName[] = { |
| 219 | "O", |
| 220 | "NO", |
| 221 | "B/NAE/C", |
| 222 | "NB/AE/NC", |
| 223 | "Z/EQ", |
| 224 | "NZ/NE", |
| 225 | "BE/NA", |
| 226 | "NBE/A", |
| 227 | "S", |
| 228 | "NS", |
| 229 | "P/PE", |
| 230 | "NP/PO", |
| 231 | "L/NGE", |
| 232 | "NL/GE", |
| 233 | "LE/NG", |
| 234 | "NLE/G" |
| 235 | }; |
| 236 | |
| 237 | /* |
| 238 | * Interpret a format string and build a string no longer than size |
| 239 | * See format key in Assemble.cc. |
| 240 | */ |
| 241 | std::string X86Mir2Lir::BuildInsnString(const char *fmt, LIR *lir, unsigned char* base_addr) { |
| 242 | std::string buf; |
| 243 | size_t i = 0; |
| 244 | size_t fmt_len = strlen(fmt); |
| 245 | while (i < fmt_len) { |
| 246 | if (fmt[i] != '!') { |
| 247 | buf += fmt[i]; |
| 248 | i++; |
| 249 | } else { |
| 250 | i++; |
| 251 | DCHECK_LT(i, fmt_len); |
| 252 | char operand_number_ch = fmt[i]; |
| 253 | i++; |
| 254 | if (operand_number_ch == '!') { |
| 255 | buf += "!"; |
| 256 | } else { |
| 257 | int operand_number = operand_number_ch - '0'; |
| 258 | DCHECK_LT(operand_number, 6); // Expect upto 6 LIR operands. |
| 259 | DCHECK_LT(i, fmt_len); |
| 260 | int operand = lir->operands[operand_number]; |
| 261 | switch (fmt[i]) { |
| 262 | case 'c': |
| 263 | DCHECK_LT(static_cast<size_t>(operand), sizeof(x86CondName)); |
| 264 | buf += x86CondName[operand]; |
| 265 | break; |
| 266 | case 'd': |
| 267 | buf += StringPrintf("%d", operand); |
| 268 | break; |
| 269 | case 'p': { |
buzbee | 0d82948 | 2013-10-11 15:24:55 -0700 | [diff] [blame] | 270 | EmbeddedData *tab_rec = reinterpret_cast<EmbeddedData*>(UnwrapPointer(operand)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 271 | buf += StringPrintf("0x%08x", tab_rec->offset); |
| 272 | break; |
| 273 | } |
| 274 | case 'r': |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 275 | if (RegStorage::IsFloat(operand)) { |
| 276 | int fp_reg = RegStorage::RegNum(operand); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 277 | buf += StringPrintf("xmm%d", fp_reg); |
| 278 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 279 | int reg_num = RegStorage::RegNum(operand); |
| 280 | DCHECK_LT(static_cast<size_t>(reg_num), sizeof(x86RegName)); |
| 281 | buf += x86RegName[reg_num]; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 282 | } |
| 283 | break; |
| 284 | case 't': |
Ian Rogers | 107c31e | 2014-01-23 20:55:29 -0800 | [diff] [blame] | 285 | buf += StringPrintf("0x%08" PRIxPTR " (L%p)", |
| 286 | reinterpret_cast<uintptr_t>(base_addr) + lir->offset + operand, |
| 287 | lir->target); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 288 | break; |
| 289 | default: |
| 290 | buf += StringPrintf("DecodeError '%c'", fmt[i]); |
| 291 | break; |
| 292 | } |
| 293 | i++; |
| 294 | } |
| 295 | } |
| 296 | } |
| 297 | return buf; |
| 298 | } |
| 299 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 300 | void X86Mir2Lir::DumpResourceMask(LIR *x86LIR, uint64_t mask, const char *prefix) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 301 | char buf[256]; |
| 302 | buf[0] = 0; |
| 303 | |
| 304 | if (mask == ENCODE_ALL) { |
| 305 | strcpy(buf, "all"); |
| 306 | } else { |
| 307 | char num[8]; |
| 308 | int i; |
| 309 | |
| 310 | for (i = 0; i < kX86RegEnd; i++) { |
| 311 | if (mask & (1ULL << i)) { |
Ian Rogers | 988e6ea | 2014-01-08 11:30:50 -0800 | [diff] [blame] | 312 | snprintf(num, arraysize(num), "%d ", i); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 313 | strcat(buf, num); |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | if (mask & ENCODE_CCODE) { |
| 318 | strcat(buf, "cc "); |
| 319 | } |
| 320 | /* Memory bits */ |
| 321 | if (x86LIR && (mask & ENCODE_DALVIK_REG)) { |
Ian Rogers | 988e6ea | 2014-01-08 11:30:50 -0800 | [diff] [blame] | 322 | snprintf(buf + strlen(buf), arraysize(buf) - strlen(buf), "dr%d%s", |
| 323 | DECODE_ALIAS_INFO_REG(x86LIR->flags.alias_info), |
| 324 | (DECODE_ALIAS_INFO_WIDE(x86LIR->flags.alias_info)) ? "(+1)" : ""); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 325 | } |
| 326 | if (mask & ENCODE_LITERAL) { |
| 327 | strcat(buf, "lit "); |
| 328 | } |
| 329 | |
| 330 | if (mask & ENCODE_HEAP_REF) { |
| 331 | strcat(buf, "heap "); |
| 332 | } |
| 333 | if (mask & ENCODE_MUST_NOT_ALIAS) { |
| 334 | strcat(buf, "noalias "); |
| 335 | } |
| 336 | } |
| 337 | if (buf[0]) { |
| 338 | LOG(INFO) << prefix << ": " << buf; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | void X86Mir2Lir::AdjustSpillMask() { |
| 343 | // Adjustment for LR spilling, x86 has no LR so nothing to do here |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 344 | core_spill_mask_ |= (1 << rs_rRET.GetRegNum()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 345 | num_core_spills_++; |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | * Mark a callee-save fp register as promoted. Note that |
| 350 | * vpush/vpop uses contiguous register lists so we must |
| 351 | * include any holes in the mask. Associate holes with |
| 352 | * Dalvik register INVALID_VREG (0xFFFFU). |
| 353 | */ |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 354 | void X86Mir2Lir::MarkPreservedSingle(int v_reg, RegStorage reg) { |
| 355 | UNIMPLEMENTED(FATAL) << "MarkPreservedSingle"; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 356 | } |
| 357 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 358 | void X86Mir2Lir::MarkPreservedDouble(int v_reg, RegStorage reg) { |
| 359 | UNIMPLEMENTED(FATAL) << "MarkPreservedDouble"; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 360 | } |
| 361 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 362 | /* Clobber all regs that might be used by an external C call */ |
Vladimir Marko | 31c2aac | 2013-12-09 16:31:19 +0000 | [diff] [blame] | 363 | void X86Mir2Lir::ClobberCallerSave() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 364 | Clobber(rs_rAX); |
| 365 | Clobber(rs_rCX); |
| 366 | Clobber(rs_rDX); |
| 367 | Clobber(rs_rBX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | RegLocation X86Mir2Lir::GetReturnWideAlt() { |
| 371 | RegLocation res = LocCReturnWide(); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 372 | DCHECK(res.reg.GetLowReg() == rs_rAX.GetReg()); |
| 373 | DCHECK(res.reg.GetHighReg() == rs_rDX.GetReg()); |
| 374 | Clobber(rs_rAX); |
| 375 | Clobber(rs_rDX); |
| 376 | MarkInUse(rs_rAX); |
| 377 | MarkInUse(rs_rDX); |
| 378 | MarkWide(res.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 379 | return res; |
| 380 | } |
| 381 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 382 | RegLocation X86Mir2Lir::GetReturnAlt() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 383 | RegLocation res = LocCReturn(); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 384 | res.reg.SetReg(rs_rDX.GetReg()); |
| 385 | Clobber(rs_rDX); |
| 386 | MarkInUse(rs_rDX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 387 | return res; |
| 388 | } |
| 389 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 390 | /* To be used when explicitly managing register use */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 391 | void X86Mir2Lir::LockCallTemps() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 392 | LockTemp(rs_rX86_ARG0); |
| 393 | LockTemp(rs_rX86_ARG1); |
| 394 | LockTemp(rs_rX86_ARG2); |
| 395 | LockTemp(rs_rX86_ARG3); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | /* To be used when explicitly managing register use */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 399 | void X86Mir2Lir::FreeCallTemps() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 400 | FreeTemp(rs_rX86_ARG0); |
| 401 | FreeTemp(rs_rX86_ARG1); |
| 402 | FreeTemp(rs_rX86_ARG2); |
| 403 | FreeTemp(rs_rX86_ARG3); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 404 | } |
| 405 | |
Razvan A Lupusoru | 99ad723 | 2014-02-25 17:41:08 -0800 | [diff] [blame] | 406 | bool X86Mir2Lir::ProvidesFullMemoryBarrier(X86OpCode opcode) { |
| 407 | switch (opcode) { |
| 408 | case kX86LockCmpxchgMR: |
| 409 | case kX86LockCmpxchgAR: |
| 410 | case kX86LockCmpxchg8bM: |
| 411 | case kX86LockCmpxchg8bA: |
| 412 | case kX86XchgMR: |
| 413 | case kX86Mfence: |
| 414 | // Atomic memory instructions provide full barrier. |
| 415 | return true; |
| 416 | default: |
| 417 | break; |
| 418 | } |
| 419 | |
| 420 | // Conservative if cannot prove it provides full barrier. |
| 421 | return false; |
| 422 | } |
| 423 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 424 | void X86Mir2Lir::GenMemBarrier(MemBarrierKind barrier_kind) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 425 | #if ANDROID_SMP != 0 |
Razvan A Lupusoru | 99ad723 | 2014-02-25 17:41:08 -0800 | [diff] [blame] | 426 | // Start off with using the last LIR as the barrier. If it is not enough, then we will update it. |
| 427 | LIR* mem_barrier = last_lir_insn_; |
| 428 | |
| 429 | /* |
| 430 | * According to the JSR-133 Cookbook, for x86 only StoreLoad barriers need memory fence. All other barriers |
| 431 | * (LoadLoad, LoadStore, StoreStore) are nops due to the x86 memory model. For those cases, all we need |
| 432 | * to ensure is that there is a scheduling barrier in place. |
| 433 | */ |
| 434 | if (barrier_kind == kStoreLoad) { |
| 435 | // If no LIR exists already that can be used a barrier, then generate an mfence. |
| 436 | if (mem_barrier == nullptr) { |
| 437 | mem_barrier = NewLIR0(kX86Mfence); |
| 438 | } |
| 439 | |
| 440 | // If last instruction does not provide full barrier, then insert an mfence. |
| 441 | if (ProvidesFullMemoryBarrier(static_cast<X86OpCode>(mem_barrier->opcode)) == false) { |
| 442 | mem_barrier = NewLIR0(kX86Mfence); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | // Now ensure that a scheduling barrier is in place. |
| 447 | if (mem_barrier == nullptr) { |
| 448 | GenBarrier(); |
| 449 | } else { |
| 450 | // Mark as a scheduling barrier. |
| 451 | DCHECK(!mem_barrier->flags.use_def_invalid); |
| 452 | mem_barrier->u.m.def_mask = ENCODE_ALL; |
| 453 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 454 | #endif |
| 455 | } |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 456 | |
| 457 | // Alloc a pair of core registers, or a double. |
| 458 | RegStorage X86Mir2Lir::AllocTypedTempWide(bool fp_hint, int reg_class) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 459 | if (((reg_class == kAnyReg) && fp_hint) || (reg_class == kFPReg)) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 460 | return AllocTempDouble(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 461 | } |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 462 | RegStorage low_reg = AllocTemp(); |
| 463 | RegStorage high_reg = AllocTemp(); |
| 464 | return RegStorage::MakeRegPair(low_reg, high_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 465 | } |
| 466 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 467 | RegStorage X86Mir2Lir::AllocTypedTemp(bool fp_hint, int reg_class) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 468 | if (((reg_class == kAnyReg) && fp_hint) || (reg_class == kFPReg)) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 469 | return AllocTempSingle(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 470 | } |
| 471 | return AllocTemp(); |
| 472 | } |
| 473 | |
| 474 | void X86Mir2Lir::CompilerInitializeRegAlloc() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 475 | reg_pool_ = new (arena_) RegisterPool(this, arena_, core_regs, sp_regs, dp_regs, reserved_regs, |
| 476 | core_temps, sp_temps, dp_temps); |
| 477 | |
| 478 | // Target-specific adjustments. |
| 479 | |
| 480 | // Alias single precision xmm to double xmms. |
| 481 | // TODO: as needed, add larger vector sizes - alias all to the largest. |
| 482 | GrowableArray<RegisterInfo*>::Iterator it(®_pool_->sp_regs_); |
| 483 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 484 | int sp_reg_num = info->GetReg().GetRegNum(); |
| 485 | RegStorage dp_reg = RegStorage::Solo64(RegStorage::kFloatingPoint | sp_reg_num); |
| 486 | RegisterInfo* dp_reg_info = GetRegInfo(dp_reg); |
| 487 | // 64-bit xmm vector register's master storage should refer to itself. |
| 488 | DCHECK_EQ(dp_reg_info, dp_reg_info->Master()); |
| 489 | // Redirect 32-bit vector's master storage to 64-bit vector. |
| 490 | info->SetMaster(dp_reg_info); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 491 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 492 | |
| 493 | // Don't start allocating temps at r0/s0/d0 or you may clobber return regs in early-exit methods. |
| 494 | // TODO: adjust for x86/hard float calling convention. |
| 495 | reg_pool_->next_core_reg_ = 2; |
| 496 | reg_pool_->next_sp_reg_ = 2; |
| 497 | reg_pool_->next_dp_reg_ = 1; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 498 | } |
| 499 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 500 | void X86Mir2Lir::FreeRegLocTemps(RegLocation rl_keep, RegLocation rl_free) { |
| 501 | DCHECK(rl_keep.wide); |
| 502 | DCHECK(rl_free.wide); |
| 503 | int free_low = rl_free.reg.GetLowReg(); |
| 504 | int free_high = rl_free.reg.GetHighReg(); |
| 505 | int keep_low = rl_keep.reg.GetLowReg(); |
| 506 | int keep_high = rl_keep.reg.GetHighReg(); |
| 507 | if ((free_low != keep_low) && (free_low != keep_high) && |
| 508 | (free_high != keep_low) && (free_high != keep_high)) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 509 | // No overlap, free both |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 510 | FreeTemp(rl_free.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 511 | } |
| 512 | } |
| 513 | |
| 514 | void X86Mir2Lir::SpillCoreRegs() { |
| 515 | if (num_core_spills_ == 0) { |
| 516 | return; |
| 517 | } |
| 518 | // Spill mask not including fake return address register |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 519 | uint32_t mask = core_spill_mask_ & ~(1 << rs_rRET.GetRegNum()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 520 | int offset = frame_size_ - (4 * num_core_spills_); |
| 521 | for (int reg = 0; mask; mask >>= 1, reg++) { |
| 522 | if (mask & 0x1) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 523 | StoreWordDisp(rs_rX86_SP, offset, RegStorage::Solo32(reg)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 524 | offset += 4; |
| 525 | } |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | void X86Mir2Lir::UnSpillCoreRegs() { |
| 530 | if (num_core_spills_ == 0) { |
| 531 | return; |
| 532 | } |
| 533 | // Spill mask not including fake return address register |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 534 | uint32_t mask = core_spill_mask_ & ~(1 << rs_rRET.GetRegNum()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 535 | int offset = frame_size_ - (4 * num_core_spills_); |
| 536 | for (int reg = 0; mask; mask >>= 1, reg++) { |
| 537 | if (mask & 0x1) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 538 | LoadWordDisp(rs_rX86_SP, offset, RegStorage::Solo32(reg)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 539 | offset += 4; |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 544 | bool X86Mir2Lir::IsUnconditionalBranch(LIR* lir) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 545 | return (lir->opcode == kX86Jmp8 || lir->opcode == kX86Jmp32); |
| 546 | } |
| 547 | |
| 548 | X86Mir2Lir::X86Mir2Lir(CompilationUnit* cu, MIRGraph* mir_graph, ArenaAllocator* arena) |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 549 | : Mir2Lir(cu, mir_graph, arena), |
Ian Rogers | dd7624d | 2014-03-14 17:43:00 -0700 | [diff] [blame] | 550 | base_of_code_(nullptr), store_method_addr_(false), store_method_addr_used_(false), |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 551 | method_address_insns_(arena, 100, kGrowableArrayMisc), |
| 552 | class_type_address_insns_(arena, 100, kGrowableArrayMisc), |
Mark Mendell | ae9fd93 | 2014-02-10 16:14:35 -0800 | [diff] [blame] | 553 | call_method_insns_(arena, 100, kGrowableArrayMisc), |
| 554 | stack_decrement_(nullptr), stack_increment_(nullptr) { |
Ian Rogers | dd7624d | 2014-03-14 17:43:00 -0700 | [diff] [blame] | 555 | if (kIsDebugBuild) { |
| 556 | for (int i = 0; i < kX86Last; i++) { |
| 557 | if (X86Mir2Lir::EncodingMap[i].opcode != i) { |
| 558 | LOG(FATAL) << "Encoding order for " << X86Mir2Lir::EncodingMap[i].name |
| 559 | << " is wrong: expecting " << i << ", seeing " |
| 560 | << static_cast<int>(X86Mir2Lir::EncodingMap[i].opcode); |
| 561 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 562 | } |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | Mir2Lir* X86CodeGenerator(CompilationUnit* const cu, MIRGraph* const mir_graph, |
| 567 | ArenaAllocator* const arena) { |
| 568 | return new X86Mir2Lir(cu, mir_graph, arena); |
| 569 | } |
| 570 | |
| 571 | // Not used in x86 |
Ian Rogers | dd7624d | 2014-03-14 17:43:00 -0700 | [diff] [blame] | 572 | RegStorage X86Mir2Lir::LoadHelper(ThreadOffset<4> offset) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 573 | LOG(FATAL) << "Unexpected use of LoadHelper in x86"; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 574 | return RegStorage::InvalidReg(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 575 | } |
| 576 | |
Dave Allison | b373e09 | 2014-02-20 16:06:36 -0800 | [diff] [blame] | 577 | LIR* X86Mir2Lir::CheckSuspendUsingLoad() { |
| 578 | LOG(FATAL) << "Unexpected use of CheckSuspendUsingLoad in x86"; |
| 579 | return nullptr; |
| 580 | } |
| 581 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 582 | uint64_t X86Mir2Lir::GetTargetInstFlags(int opcode) { |
buzbee | 409fe94 | 2013-10-11 10:49:56 -0700 | [diff] [blame] | 583 | DCHECK(!IsPseudoLirOp(opcode)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 584 | return X86Mir2Lir::EncodingMap[opcode].flags; |
| 585 | } |
| 586 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 587 | const char* X86Mir2Lir::GetTargetInstName(int opcode) { |
buzbee | 409fe94 | 2013-10-11 10:49:56 -0700 | [diff] [blame] | 588 | DCHECK(!IsPseudoLirOp(opcode)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 589 | return X86Mir2Lir::EncodingMap[opcode].name; |
| 590 | } |
| 591 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 592 | const char* X86Mir2Lir::GetTargetInstFmt(int opcode) { |
buzbee | 409fe94 | 2013-10-11 10:49:56 -0700 | [diff] [blame] | 593 | DCHECK(!IsPseudoLirOp(opcode)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 594 | return X86Mir2Lir::EncodingMap[opcode].fmt; |
| 595 | } |
| 596 | |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 597 | void X86Mir2Lir::GenConstWide(RegLocation rl_dest, int64_t value) { |
| 598 | // Can we do this directly to memory? |
| 599 | rl_dest = UpdateLocWide(rl_dest); |
| 600 | if ((rl_dest.location == kLocDalvikFrame) || |
| 601 | (rl_dest.location == kLocCompilerTemp)) { |
| 602 | int32_t val_lo = Low32Bits(value); |
| 603 | int32_t val_hi = High32Bits(value); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 604 | int r_base = TargetReg(kSp).GetReg(); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 605 | int displacement = SRegOffset(rl_dest.s_reg_low); |
| 606 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 607 | LIR * store = NewLIR3(kX86Mov32MI, r_base, displacement + LOWORD_OFFSET, val_lo); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 608 | AnnotateDalvikRegAccess(store, (displacement + LOWORD_OFFSET) >> 2, |
| 609 | false /* is_load */, true /* is64bit */); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 610 | store = NewLIR3(kX86Mov32MI, r_base, displacement + HIWORD_OFFSET, val_hi); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 611 | AnnotateDalvikRegAccess(store, (displacement + HIWORD_OFFSET) >> 2, |
| 612 | false /* is_load */, true /* is64bit */); |
| 613 | return; |
| 614 | } |
| 615 | |
| 616 | // Just use the standard code to do the generation. |
| 617 | Mir2Lir::GenConstWide(rl_dest, value); |
| 618 | } |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 619 | |
| 620 | // TODO: Merge with existing RegLocation dumper in vreg_analysis.cc |
| 621 | void X86Mir2Lir::DumpRegLocation(RegLocation loc) { |
| 622 | LOG(INFO) << "location: " << loc.location << ',' |
| 623 | << (loc.wide ? " w" : " ") |
| 624 | << (loc.defined ? " D" : " ") |
| 625 | << (loc.is_const ? " c" : " ") |
| 626 | << (loc.fp ? " F" : " ") |
| 627 | << (loc.core ? " C" : " ") |
| 628 | << (loc.ref ? " r" : " ") |
| 629 | << (loc.high_word ? " h" : " ") |
| 630 | << (loc.home ? " H" : " ") |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 631 | << ", low: " << static_cast<int>(loc.reg.GetLowReg()) |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 632 | << ", high: " << static_cast<int>(loc.reg.GetHighReg()) |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 633 | << ", s_reg: " << loc.s_reg_low |
| 634 | << ", orig: " << loc.orig_sreg; |
| 635 | } |
| 636 | |
Mark Mendell | 67c39c4 | 2014-01-31 17:28:00 -0800 | [diff] [blame] | 637 | void X86Mir2Lir::Materialize() { |
| 638 | // A good place to put the analysis before starting. |
| 639 | AnalyzeMIR(); |
| 640 | |
| 641 | // Now continue with regular code generation. |
| 642 | Mir2Lir::Materialize(); |
| 643 | } |
| 644 | |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 645 | void X86Mir2Lir::LoadMethodAddress(const MethodReference& target_method, InvokeType type, |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 646 | SpecialTargetRegister symbolic_reg) { |
| 647 | /* |
| 648 | * For x86, just generate a 32 bit move immediate instruction, that will be filled |
| 649 | * in at 'link time'. For now, put a unique value based on target to ensure that |
| 650 | * code deduplication works. |
| 651 | */ |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 652 | int target_method_idx = target_method.dex_method_index; |
| 653 | const DexFile* target_dex_file = target_method.dex_file; |
| 654 | const DexFile::MethodId& target_method_id = target_dex_file->GetMethodId(target_method_idx); |
| 655 | uintptr_t target_method_id_ptr = reinterpret_cast<uintptr_t>(&target_method_id); |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 656 | |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 657 | // Generate the move instruction with the unique pointer and save index, dex_file, and type. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 658 | LIR *move = RawLIR(current_dalvik_offset_, kX86Mov32RI, TargetReg(symbolic_reg).GetReg(), |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 659 | static_cast<int>(target_method_id_ptr), target_method_idx, |
| 660 | WrapPointer(const_cast<DexFile*>(target_dex_file)), type); |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 661 | AppendLIR(move); |
| 662 | method_address_insns_.Insert(move); |
| 663 | } |
| 664 | |
| 665 | void X86Mir2Lir::LoadClassType(uint32_t type_idx, SpecialTargetRegister symbolic_reg) { |
| 666 | /* |
| 667 | * For x86, just generate a 32 bit move immediate instruction, that will be filled |
| 668 | * in at 'link time'. For now, put a unique value based on target to ensure that |
| 669 | * code deduplication works. |
| 670 | */ |
| 671 | const DexFile::TypeId& id = cu_->dex_file->GetTypeId(type_idx); |
| 672 | uintptr_t ptr = reinterpret_cast<uintptr_t>(&id); |
| 673 | |
| 674 | // Generate the move instruction with the unique pointer and save index and type. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 675 | LIR *move = RawLIR(current_dalvik_offset_, kX86Mov32RI, TargetReg(symbolic_reg).GetReg(), |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 676 | static_cast<int>(ptr), type_idx); |
| 677 | AppendLIR(move); |
| 678 | class_type_address_insns_.Insert(move); |
| 679 | } |
| 680 | |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 681 | LIR *X86Mir2Lir::CallWithLinkerFixup(const MethodReference& target_method, InvokeType type) { |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 682 | /* |
| 683 | * For x86, just generate a 32 bit call relative instruction, that will be filled |
| 684 | * in at 'link time'. For now, put a unique value based on target to ensure that |
| 685 | * code deduplication works. |
| 686 | */ |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 687 | int target_method_idx = target_method.dex_method_index; |
| 688 | const DexFile* target_dex_file = target_method.dex_file; |
| 689 | const DexFile::MethodId& target_method_id = target_dex_file->GetMethodId(target_method_idx); |
| 690 | uintptr_t target_method_id_ptr = reinterpret_cast<uintptr_t>(&target_method_id); |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 691 | |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 692 | // Generate the call instruction with the unique pointer and save index, dex_file, and type. |
| 693 | LIR *call = RawLIR(current_dalvik_offset_, kX86CallI, static_cast<int>(target_method_id_ptr), |
| 694 | target_method_idx, WrapPointer(const_cast<DexFile*>(target_dex_file)), type); |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 695 | AppendLIR(call); |
| 696 | call_method_insns_.Insert(call); |
| 697 | return call; |
| 698 | } |
| 699 | |
| 700 | void X86Mir2Lir::InstallLiteralPools() { |
| 701 | // These are handled differently for x86. |
| 702 | DCHECK(code_literal_list_ == nullptr); |
| 703 | DCHECK(method_literal_list_ == nullptr); |
| 704 | DCHECK(class_literal_list_ == nullptr); |
| 705 | |
| 706 | // Handle the fixups for methods. |
| 707 | for (uint32_t i = 0; i < method_address_insns_.Size(); i++) { |
| 708 | LIR* p = method_address_insns_.Get(i); |
| 709 | DCHECK_EQ(p->opcode, kX86Mov32RI); |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 710 | uint32_t target_method_idx = p->operands[2]; |
| 711 | const DexFile* target_dex_file = |
| 712 | reinterpret_cast<const DexFile*>(UnwrapPointer(p->operands[3])); |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 713 | |
| 714 | // The offset to patch is the last 4 bytes of the instruction. |
| 715 | int patch_offset = p->offset + p->flags.size - 4; |
| 716 | cu_->compiler_driver->AddMethodPatch(cu_->dex_file, cu_->class_def_idx, |
| 717 | cu_->method_idx, cu_->invoke_type, |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 718 | target_method_idx, target_dex_file, |
| 719 | static_cast<InvokeType>(p->operands[4]), |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 720 | patch_offset); |
| 721 | } |
| 722 | |
| 723 | // Handle the fixups for class types. |
| 724 | for (uint32_t i = 0; i < class_type_address_insns_.Size(); i++) { |
| 725 | LIR* p = class_type_address_insns_.Get(i); |
| 726 | DCHECK_EQ(p->opcode, kX86Mov32RI); |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 727 | uint32_t target_method_idx = p->operands[2]; |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 728 | |
| 729 | // The offset to patch is the last 4 bytes of the instruction. |
| 730 | int patch_offset = p->offset + p->flags.size - 4; |
| 731 | cu_->compiler_driver->AddClassPatch(cu_->dex_file, cu_->class_def_idx, |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 732 | cu_->method_idx, target_method_idx, patch_offset); |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | // And now the PC-relative calls to methods. |
| 736 | for (uint32_t i = 0; i < call_method_insns_.Size(); i++) { |
| 737 | LIR* p = call_method_insns_.Get(i); |
| 738 | DCHECK_EQ(p->opcode, kX86CallI); |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 739 | uint32_t target_method_idx = p->operands[1]; |
| 740 | const DexFile* target_dex_file = |
| 741 | reinterpret_cast<const DexFile*>(UnwrapPointer(p->operands[2])); |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 742 | |
| 743 | // The offset to patch is the last 4 bytes of the instruction. |
| 744 | int patch_offset = p->offset + p->flags.size - 4; |
| 745 | cu_->compiler_driver->AddRelativeCodePatch(cu_->dex_file, cu_->class_def_idx, |
Jeff Hao | 49161ce | 2014-03-12 11:05:25 -0700 | [diff] [blame] | 746 | cu_->method_idx, cu_->invoke_type, |
| 747 | target_method_idx, target_dex_file, |
| 748 | static_cast<InvokeType>(p->operands[3]), |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 749 | patch_offset, -4 /* offset */); |
| 750 | } |
| 751 | |
| 752 | // And do the normal processing. |
| 753 | Mir2Lir::InstallLiteralPools(); |
| 754 | } |
| 755 | |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 756 | /* |
| 757 | * Fast string.index_of(I) & (II). Inline check for simple case of char <= 0xffff, |
| 758 | * otherwise bails to standard library code. |
| 759 | */ |
| 760 | bool X86Mir2Lir::GenInlinedIndexOf(CallInfo* info, bool zero_based) { |
| 761 | ClobberCallerSave(); |
| 762 | LockCallTemps(); // Using fixed registers |
| 763 | |
| 764 | // EAX: 16 bit character being searched. |
| 765 | // ECX: count: number of words to be searched. |
| 766 | // EDI: String being searched. |
| 767 | // EDX: temporary during execution. |
| 768 | // EBX: temporary during execution. |
| 769 | |
| 770 | RegLocation rl_obj = info->args[0]; |
| 771 | RegLocation rl_char = info->args[1]; |
buzbee | a44d4f5 | 2014-03-05 11:26:39 -0800 | [diff] [blame] | 772 | RegLocation rl_start; // Note: only present in III flavor or IndexOf. |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 773 | |
| 774 | uint32_t char_value = |
| 775 | rl_char.is_const ? mir_graph_->ConstantValue(rl_char.orig_sreg) : 0; |
| 776 | |
| 777 | if (char_value > 0xFFFF) { |
| 778 | // We have to punt to the real String.indexOf. |
| 779 | return false; |
| 780 | } |
| 781 | |
| 782 | // Okay, we are commited to inlining this. |
| 783 | RegLocation rl_return = GetReturn(false); |
| 784 | RegLocation rl_dest = InlineTarget(info); |
| 785 | |
| 786 | // Is the string non-NULL? |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 787 | LoadValueDirectFixed(rl_obj, rs_rDX); |
| 788 | GenNullCheck(rs_rDX, info->opt_flags); |
Vladimir Marko | 3bc8615 | 2014-03-13 14:11:28 +0000 | [diff] [blame] | 789 | info->opt_flags |= MIR_IGNORE_NULL_CHECK; // Record that we've null checked. |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 790 | |
| 791 | // Does the character fit in 16 bits? |
Mingyao Yang | 3a74d15 | 2014-04-21 15:39:44 -0700 | [diff] [blame] | 792 | LIR* slowpath_branch = nullptr; |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 793 | if (rl_char.is_const) { |
| 794 | // We need the value in EAX. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 795 | LoadConstantNoClobber(rs_rAX, char_value); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 796 | } else { |
| 797 | // Character is not a constant; compare at runtime. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 798 | LoadValueDirectFixed(rl_char, rs_rAX); |
Mingyao Yang | 3a74d15 | 2014-04-21 15:39:44 -0700 | [diff] [blame] | 799 | slowpath_branch = OpCmpImmBranch(kCondGt, rs_rAX, 0xFFFF, nullptr); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 800 | } |
| 801 | |
| 802 | // From here down, we know that we are looking for a char that fits in 16 bits. |
Mark Mendell | e19c91f | 2014-02-25 08:19:08 -0800 | [diff] [blame] | 803 | // Location of reference to data array within the String object. |
| 804 | int value_offset = mirror::String::ValueOffset().Int32Value(); |
| 805 | // Location of count within the String object. |
| 806 | int count_offset = mirror::String::CountOffset().Int32Value(); |
| 807 | // Starting offset within data array. |
| 808 | int offset_offset = mirror::String::OffsetOffset().Int32Value(); |
| 809 | // Start of char data with array_. |
| 810 | int data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Int32Value(); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 811 | |
| 812 | // Character is in EAX. |
| 813 | // Object pointer is in EDX. |
| 814 | |
| 815 | // We need to preserve EDI, but have no spare registers, so push it on the stack. |
| 816 | // We have to remember that all stack addresses after this are offset by sizeof(EDI). |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 817 | NewLIR1(kX86Push32R, rs_rDI.GetReg()); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 818 | |
| 819 | // Compute the number of words to search in to rCX. |
buzbee | 695d13a | 2014-04-19 13:32:20 -0700 | [diff] [blame] | 820 | Load32Disp(rs_rDX, count_offset, rs_rCX); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 821 | LIR *length_compare = nullptr; |
| 822 | int start_value = 0; |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 823 | bool is_index_on_stack = false; |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 824 | if (zero_based) { |
| 825 | // We have to handle an empty string. Use special instruction JECXZ. |
| 826 | length_compare = NewLIR0(kX86Jecxz8); |
| 827 | } else { |
buzbee | a44d4f5 | 2014-03-05 11:26:39 -0800 | [diff] [blame] | 828 | rl_start = info->args[2]; |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 829 | // We have to offset by the start index. |
| 830 | if (rl_start.is_const) { |
| 831 | start_value = mir_graph_->ConstantValue(rl_start.orig_sreg); |
| 832 | start_value = std::max(start_value, 0); |
| 833 | |
| 834 | // Is the start > count? |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 835 | length_compare = OpCmpImmBranch(kCondLe, rs_rCX, start_value, nullptr); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 836 | |
| 837 | if (start_value != 0) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 838 | OpRegImm(kOpSub, rs_rCX, start_value); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 839 | } |
| 840 | } else { |
| 841 | // Runtime start index. |
| 842 | rl_start = UpdateLoc(rl_start); |
| 843 | if (rl_start.location == kLocPhysReg) { |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 844 | // Handle "start index < 0" case. |
| 845 | OpRegReg(kOpXor, rs_rBX, rs_rBX); |
| 846 | OpRegReg(kOpCmp, rl_start.reg, rs_rBX); |
| 847 | OpCondRegReg(kOpCmov, kCondLt, rl_start.reg, rs_rBX); |
| 848 | |
| 849 | // The length of the string should be greater than the start index. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 850 | length_compare = OpCmpBranch(kCondLe, rs_rCX, rl_start.reg, nullptr); |
| 851 | OpRegReg(kOpSub, rs_rCX, rl_start.reg); |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 852 | if (rl_start.reg == rs_rDI) { |
| 853 | // The special case. We will use EDI further, so lets put start index to stack. |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 854 | NewLIR1(kX86Push32R, rs_rDI.GetReg()); |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 855 | is_index_on_stack = true; |
| 856 | } |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 857 | } else { |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 858 | // Load the start index from stack, remembering that we pushed EDI. |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 859 | int displacement = SRegOffset(rl_start.s_reg_low) + sizeof(uint32_t); |
buzbee | 695d13a | 2014-04-19 13:32:20 -0700 | [diff] [blame] | 860 | Load32Disp(rs_rX86_SP, displacement, rs_rBX); |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 861 | OpRegReg(kOpXor, rs_rDI, rs_rDI); |
| 862 | OpRegReg(kOpCmp, rs_rBX, rs_rDI); |
| 863 | OpCondRegReg(kOpCmov, kCondLt, rs_rBX, rs_rDI); |
| 864 | |
| 865 | length_compare = OpCmpBranch(kCondLe, rs_rCX, rs_rBX, nullptr); |
| 866 | OpRegReg(kOpSub, rs_rCX, rs_rBX); |
| 867 | // Put the start index to stack. |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 868 | NewLIR1(kX86Push32R, rs_rBX.GetReg()); |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 869 | is_index_on_stack = true; |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 870 | } |
| 871 | } |
| 872 | } |
| 873 | DCHECK(length_compare != nullptr); |
| 874 | |
| 875 | // ECX now contains the count in words to be searched. |
| 876 | |
| 877 | // Load the address of the string into EBX. |
Mark Mendell | e19c91f | 2014-02-25 08:19:08 -0800 | [diff] [blame] | 878 | // The string starts at VALUE(String) + 2 * OFFSET(String) + DATA_OFFSET. |
buzbee | 695d13a | 2014-04-19 13:32:20 -0700 | [diff] [blame] | 879 | Load32Disp(rs_rDX, value_offset, rs_rDI); |
| 880 | Load32Disp(rs_rDX, offset_offset, rs_rBX); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 881 | OpLea(rs_rBX, rs_rDI, rs_rBX, 1, data_offset); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 882 | |
| 883 | // Now compute into EDI where the search will start. |
| 884 | if (zero_based || rl_start.is_const) { |
| 885 | if (start_value == 0) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 886 | OpRegCopy(rs_rDI, rs_rBX); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 887 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 888 | NewLIR3(kX86Lea32RM, rs_rDI.GetReg(), rs_rBX.GetReg(), 2 * start_value); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 889 | } |
| 890 | } else { |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 891 | if (is_index_on_stack == true) { |
| 892 | // Load the start index from stack. |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 893 | NewLIR1(kX86Pop32R, rs_rDX.GetReg()); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 894 | OpLea(rs_rDI, rs_rBX, rs_rDX, 1, 0); |
Alexei Zavjalov | a1758d8 | 2014-04-17 01:55:43 +0700 | [diff] [blame] | 895 | } else { |
| 896 | OpLea(rs_rDI, rs_rBX, rl_start.reg, 1, 0); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 897 | } |
| 898 | } |
| 899 | |
| 900 | // EDI now contains the start of the string to be searched. |
| 901 | // We are all prepared to do the search for the character. |
| 902 | NewLIR0(kX86RepneScasw); |
| 903 | |
| 904 | // Did we find a match? |
| 905 | LIR* failed_branch = OpCondBranch(kCondNe, nullptr); |
| 906 | |
| 907 | // yes, we matched. Compute the index of the result. |
| 908 | // index = ((curr_ptr - orig_ptr) / 2) - 1. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 909 | OpRegReg(kOpSub, rs_rDI, rs_rBX); |
| 910 | OpRegImm(kOpAsr, rs_rDI, 1); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 911 | NewLIR3(kX86Lea32RM, rl_return.reg.GetReg(), rs_rDI.GetReg(), -1); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 912 | LIR *all_done = NewLIR1(kX86Jmp8, 0); |
| 913 | |
| 914 | // Failed to match; return -1. |
| 915 | LIR *not_found = NewLIR0(kPseudoTargetLabel); |
| 916 | length_compare->target = not_found; |
| 917 | failed_branch->target = not_found; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 918 | LoadConstantNoClobber(rl_return.reg, -1); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 919 | |
| 920 | // And join up at the end. |
| 921 | all_done->target = NewLIR0(kPseudoTargetLabel); |
| 922 | // Restore EDI from the stack. |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 923 | NewLIR1(kX86Pop32R, rs_rDI.GetReg()); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 924 | |
| 925 | // Out of line code returns here. |
Mingyao Yang | 3a74d15 | 2014-04-21 15:39:44 -0700 | [diff] [blame] | 926 | if (slowpath_branch != nullptr) { |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 927 | LIR *return_point = NewLIR0(kPseudoTargetLabel); |
Mingyao Yang | 3a74d15 | 2014-04-21 15:39:44 -0700 | [diff] [blame] | 928 | AddIntrinsicSlowPath(info, slowpath_branch, return_point); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | StoreValue(rl_dest, rl_return); |
| 932 | return true; |
| 933 | } |
| 934 | |
Mark Mendell | ae9fd93 | 2014-02-10 16:14:35 -0800 | [diff] [blame] | 935 | /* |
| 936 | * @brief Enter a 32 bit quantity into the FDE buffer |
| 937 | * @param buf FDE buffer. |
| 938 | * @param data Data value. |
| 939 | */ |
| 940 | static void PushWord(std::vector<uint8_t>&buf, int data) { |
| 941 | buf.push_back(data & 0xff); |
| 942 | buf.push_back((data >> 8) & 0xff); |
| 943 | buf.push_back((data >> 16) & 0xff); |
| 944 | buf.push_back((data >> 24) & 0xff); |
| 945 | } |
| 946 | |
| 947 | /* |
| 948 | * @brief Enter an 'advance LOC' into the FDE buffer |
| 949 | * @param buf FDE buffer. |
| 950 | * @param increment Amount by which to increase the current location. |
| 951 | */ |
| 952 | static void AdvanceLoc(std::vector<uint8_t>&buf, uint32_t increment) { |
| 953 | if (increment < 64) { |
| 954 | // Encoding in opcode. |
| 955 | buf.push_back(0x1 << 6 | increment); |
| 956 | } else if (increment < 256) { |
| 957 | // Single byte delta. |
| 958 | buf.push_back(0x02); |
| 959 | buf.push_back(increment); |
| 960 | } else if (increment < 256 * 256) { |
| 961 | // Two byte delta. |
| 962 | buf.push_back(0x03); |
| 963 | buf.push_back(increment & 0xff); |
| 964 | buf.push_back((increment >> 8) & 0xff); |
| 965 | } else { |
| 966 | // Four byte delta. |
| 967 | buf.push_back(0x04); |
| 968 | PushWord(buf, increment); |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | |
| 973 | std::vector<uint8_t>* X86CFIInitialization() { |
| 974 | return X86Mir2Lir::ReturnCommonCallFrameInformation(); |
| 975 | } |
| 976 | |
| 977 | std::vector<uint8_t>* X86Mir2Lir::ReturnCommonCallFrameInformation() { |
| 978 | std::vector<uint8_t>*cfi_info = new std::vector<uint8_t>; |
| 979 | |
| 980 | // Length of the CIE (except for this field). |
| 981 | PushWord(*cfi_info, 16); |
| 982 | |
| 983 | // CIE id. |
| 984 | PushWord(*cfi_info, 0xFFFFFFFFU); |
| 985 | |
| 986 | // Version: 3. |
| 987 | cfi_info->push_back(0x03); |
| 988 | |
| 989 | // Augmentation: empty string. |
| 990 | cfi_info->push_back(0x0); |
| 991 | |
| 992 | // Code alignment: 1. |
| 993 | cfi_info->push_back(0x01); |
| 994 | |
| 995 | // Data alignment: -4. |
| 996 | cfi_info->push_back(0x7C); |
| 997 | |
| 998 | // Return address register (R8). |
| 999 | cfi_info->push_back(0x08); |
| 1000 | |
| 1001 | // Initial return PC is 4(ESP): DW_CFA_def_cfa R4 4. |
| 1002 | cfi_info->push_back(0x0C); |
| 1003 | cfi_info->push_back(0x04); |
| 1004 | cfi_info->push_back(0x04); |
| 1005 | |
| 1006 | // Return address location: 0(SP): DW_CFA_offset R8 1 (* -4);. |
| 1007 | cfi_info->push_back(0x2 << 6 | 0x08); |
| 1008 | cfi_info->push_back(0x01); |
| 1009 | |
| 1010 | // And 2 Noops to align to 4 byte boundary. |
| 1011 | cfi_info->push_back(0x0); |
| 1012 | cfi_info->push_back(0x0); |
| 1013 | |
| 1014 | DCHECK_EQ(cfi_info->size() & 3, 0U); |
| 1015 | return cfi_info; |
| 1016 | } |
| 1017 | |
| 1018 | static void EncodeUnsignedLeb128(std::vector<uint8_t>& buf, uint32_t value) { |
| 1019 | uint8_t buffer[12]; |
| 1020 | uint8_t *ptr = EncodeUnsignedLeb128(buffer, value); |
| 1021 | for (uint8_t *p = buffer; p < ptr; p++) { |
| 1022 | buf.push_back(*p); |
| 1023 | } |
| 1024 | } |
| 1025 | |
| 1026 | std::vector<uint8_t>* X86Mir2Lir::ReturnCallFrameInformation() { |
| 1027 | std::vector<uint8_t>*cfi_info = new std::vector<uint8_t>; |
| 1028 | |
| 1029 | // Generate the FDE for the method. |
| 1030 | DCHECK_NE(data_offset_, 0U); |
| 1031 | |
| 1032 | // Length (will be filled in later in this routine). |
| 1033 | PushWord(*cfi_info, 0); |
| 1034 | |
| 1035 | // CIE_pointer (can be filled in by linker); might be left at 0 if there is only |
| 1036 | // one CIE for the whole debug_frame section. |
| 1037 | PushWord(*cfi_info, 0); |
| 1038 | |
| 1039 | // 'initial_location' (filled in by linker). |
| 1040 | PushWord(*cfi_info, 0); |
| 1041 | |
| 1042 | // 'address_range' (number of bytes in the method). |
| 1043 | PushWord(*cfi_info, data_offset_); |
| 1044 | |
| 1045 | // The instructions in the FDE. |
| 1046 | if (stack_decrement_ != nullptr) { |
| 1047 | // Advance LOC to just past the stack decrement. |
| 1048 | uint32_t pc = NEXT_LIR(stack_decrement_)->offset; |
| 1049 | AdvanceLoc(*cfi_info, pc); |
| 1050 | |
| 1051 | // Now update the offset to the call frame: DW_CFA_def_cfa_offset frame_size. |
| 1052 | cfi_info->push_back(0x0e); |
| 1053 | EncodeUnsignedLeb128(*cfi_info, frame_size_); |
| 1054 | |
| 1055 | // We continue with that stack until the epilogue. |
| 1056 | if (stack_increment_ != nullptr) { |
| 1057 | uint32_t new_pc = NEXT_LIR(stack_increment_)->offset; |
| 1058 | AdvanceLoc(*cfi_info, new_pc - pc); |
| 1059 | |
| 1060 | // We probably have code snippets after the epilogue, so save the |
| 1061 | // current state: DW_CFA_remember_state. |
| 1062 | cfi_info->push_back(0x0a); |
| 1063 | |
| 1064 | // We have now popped the stack: DW_CFA_def_cfa_offset 4. There is only the return |
| 1065 | // PC on the stack now. |
| 1066 | cfi_info->push_back(0x0e); |
| 1067 | EncodeUnsignedLeb128(*cfi_info, 4); |
| 1068 | |
| 1069 | // Everything after that is the same as before the epilogue. |
| 1070 | // Stack bump was followed by RET instruction. |
| 1071 | LIR *post_ret_insn = NEXT_LIR(NEXT_LIR(stack_increment_)); |
| 1072 | if (post_ret_insn != nullptr) { |
| 1073 | pc = new_pc; |
| 1074 | new_pc = post_ret_insn->offset; |
| 1075 | AdvanceLoc(*cfi_info, new_pc - pc); |
| 1076 | // Restore the state: DW_CFA_restore_state. |
| 1077 | cfi_info->push_back(0x0b); |
| 1078 | } |
| 1079 | } |
| 1080 | } |
| 1081 | |
| 1082 | // Padding to a multiple of 4 |
| 1083 | while ((cfi_info->size() & 3) != 0) { |
| 1084 | // DW_CFA_nop is encoded as 0. |
| 1085 | cfi_info->push_back(0); |
| 1086 | } |
| 1087 | |
| 1088 | // Set the length of the FDE inside the generated bytes. |
| 1089 | uint32_t length = cfi_info->size() - 4; |
| 1090 | (*cfi_info)[0] = length; |
| 1091 | (*cfi_info)[1] = length >> 8; |
| 1092 | (*cfi_info)[2] = length >> 16; |
| 1093 | (*cfi_info)[3] = length >> 24; |
| 1094 | return cfi_info; |
| 1095 | } |
| 1096 | |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 1097 | } // namespace art |