buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [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 | |
| 17 | /* This file contains codegen for the X86 ISA */ |
| 18 | |
buzbee | 1bc37c6 | 2012-11-20 13:35:41 -0800 | [diff] [blame] | 19 | #include "x86_lir.h" |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 20 | #include "codegen_x86.h" |
buzbee | 1bc37c6 | 2012-11-20 13:35:41 -0800 | [diff] [blame] | 21 | #include "../codegen_util.h" |
| 22 | #include "../ralloc_util.h" |
| 23 | |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 24 | namespace art { |
| 25 | |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 26 | void X86Codegen::GenSpecialCase(CompilationUnit* cu, BasicBlock* bb, MIR* mir, |
| 27 | SpecialCaseHandler special_case) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 28 | { |
| 29 | // TODO |
| 30 | } |
| 31 | |
| 32 | /* |
| 33 | * The sparse table in the literal pool is an array of <key,displacement> |
| 34 | * pairs. |
| 35 | */ |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 36 | void X86Codegen::GenSparseSwitch(CompilationUnit* cu, uint32_t table_offset, RegLocation rl_src) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 37 | { |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 38 | const uint16_t* table = cu->insns + cu->current_dalvik_offset + table_offset; |
| 39 | if (cu->verbose) { |
buzbee | 52a77fc | 2012-11-20 19:50:46 -0800 | [diff] [blame] | 40 | DumpSparseSwitchTable(table); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 41 | } |
| 42 | int entries = table[1]; |
buzbee | cbd6d44 | 2012-11-17 14:11:25 -0800 | [diff] [blame] | 43 | const int* keys = reinterpret_cast<const int*>(&table[2]); |
| 44 | const int* targets = &keys[entries]; |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 45 | rl_src = LoadValue(cu, rl_src, kCoreReg); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 46 | for (int i = 0; i < entries; i++) { |
| 47 | int key = keys[i]; |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 48 | BasicBlock* case_block = FindBlock(cu, cu->current_dalvik_offset + targets[i]); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 49 | LIR* label_list = cu->block_label_list; |
| 50 | OpCmpImmBranch(cu, kCondEq, rl_src.low_reg, key, |
| 51 | &label_list[case_block->id]); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 52 | } |
| 53 | } |
| 54 | |
| 55 | /* |
| 56 | * Code pattern will look something like: |
| 57 | * |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 58 | * mov r_val, .. |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 59 | * call 0 |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 60 | * pop r_start_of_method |
| 61 | * sub r_start_of_method, .. |
| 62 | * mov r_key_reg, r_val |
| 63 | * sub r_key_reg, low_key |
| 64 | * cmp r_key_reg, size-1 ; bound check |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 65 | * ja done |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 66 | * mov r_disp, [r_start_of_method + r_key_reg * 4 + table_offset] |
| 67 | * add r_start_of_method, r_disp |
| 68 | * jmp r_start_of_method |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 69 | * done: |
| 70 | */ |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 71 | void X86Codegen::GenPackedSwitch(CompilationUnit* cu, uint32_t table_offset, RegLocation rl_src) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 72 | { |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 73 | const uint16_t* table = cu->insns + cu->current_dalvik_offset + table_offset; |
| 74 | if (cu->verbose) { |
buzbee | 52a77fc | 2012-11-20 19:50:46 -0800 | [diff] [blame] | 75 | DumpPackedSwitchTable(table); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 76 | } |
| 77 | // Add the table to the list - we'll process it later |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 78 | SwitchTable *tab_rec = |
| 79 | static_cast<SwitchTable *>(NewMem(cu, sizeof(SwitchTable), true, kAllocData)); |
| 80 | tab_rec->table = table; |
| 81 | tab_rec->vaddr = cu->current_dalvik_offset; |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 82 | int size = table[1]; |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 83 | tab_rec->targets = static_cast<LIR**>(NewMem(cu, size * sizeof(LIR*), true, kAllocLIR)); |
| 84 | InsertGrowableList(cu, &cu->switch_tables, reinterpret_cast<uintptr_t>(tab_rec)); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 85 | |
| 86 | // Get the switch value |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 87 | rl_src = LoadValue(cu, rl_src, kCoreReg); |
| 88 | int start_of_method_reg = AllocTemp(cu); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 89 | // Materialize a pointer to the switch table |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 90 | //NewLIR0(cu, kX86Bkpt); |
| 91 | NewLIR1(cu, kX86StartOfMethod, start_of_method_reg); |
| 92 | int low_key = s4FromSwitchData(&table[2]); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 93 | int keyReg; |
| 94 | // Remove the bias, if necessary |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 95 | if (low_key == 0) { |
| 96 | keyReg = rl_src.low_reg; |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 97 | } else { |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 98 | keyReg = AllocTemp(cu); |
| 99 | OpRegRegImm(cu, kOpSub, keyReg, rl_src.low_reg, low_key); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 100 | } |
| 101 | // Bounds check - if < 0 or >= size continue following switch |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 102 | OpRegImm(cu, kOpCmp, keyReg, size-1); |
| 103 | LIR* branch_over = OpCondBranch(cu, kCondHi, NULL); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 104 | |
| 105 | // Load the displacement from the switch table |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 106 | int disp_reg = AllocTemp(cu); |
| 107 | NewLIR5(cu, kX86PcRelLoadRA, disp_reg, start_of_method_reg, keyReg, 2, |
| 108 | reinterpret_cast<uintptr_t>(tab_rec)); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 109 | // Add displacement to start of method |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 110 | OpRegReg(cu, kOpAdd, start_of_method_reg, disp_reg); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 111 | // ..and go! |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 112 | LIR* switch_branch = NewLIR1(cu, kX86JmpR, start_of_method_reg); |
| 113 | tab_rec->anchor = switch_branch; |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 114 | |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 115 | /* branch_over target here */ |
| 116 | LIR* target = NewLIR0(cu, kPseudoTargetLabel); |
| 117 | branch_over->target = target; |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 118 | } |
| 119 | |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 120 | /* |
| 121 | * Array data table format: |
| 122 | * ushort ident = 0x0300 magic value |
| 123 | * ushort width width of each element in the table |
| 124 | * uint size number of elements in the table |
| 125 | * ubyte data[size*width] table of data values (may contain a single-byte |
| 126 | * padding at the end) |
| 127 | * |
| 128 | * Total size is 4+(width * size + 1)/2 16-bit code units. |
| 129 | */ |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 130 | void X86Codegen::GenFillArrayData(CompilationUnit* cu, uint32_t table_offset, RegLocation rl_src) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 131 | { |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 132 | const uint16_t* table = cu->insns + cu->current_dalvik_offset + table_offset; |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 133 | // Add the table to the list - we'll process it later |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 134 | FillArrayData *tab_rec = |
| 135 | static_cast<FillArrayData*>(NewMem(cu, sizeof(FillArrayData), true, kAllocData)); |
| 136 | tab_rec->table = table; |
| 137 | tab_rec->vaddr = cu->current_dalvik_offset; |
| 138 | uint16_t width = tab_rec->table[1]; |
| 139 | uint32_t size = tab_rec->table[2] | ((static_cast<uint32_t>(tab_rec->table[3])) << 16); |
| 140 | tab_rec->size = (size * width) + 8; |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 141 | |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 142 | InsertGrowableList(cu, &cu->fill_array_data, reinterpret_cast<uintptr_t>(tab_rec)); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 143 | |
| 144 | // Making a call - use explicit registers |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 145 | FlushAllRegs(cu); /* Everything to home location */ |
| 146 | LoadValueDirectFixed(cu, rl_src, rX86_ARG0); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 147 | // Materialize a pointer to the fill data image |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 148 | NewLIR1(cu, kX86StartOfMethod, rX86_ARG2); |
| 149 | NewLIR2(cu, kX86PcRelAdr, rX86_ARG1, reinterpret_cast<uintptr_t>(tab_rec)); |
| 150 | NewLIR2(cu, kX86Add32RR, rX86_ARG1, rX86_ARG2); |
| 151 | CallRuntimeHelperRegReg(cu, ENTRYPOINT_OFFSET(pHandleFillArrayDataFromCode), rX86_ARG0, |
buzbee | cbd6d44 | 2012-11-17 14:11:25 -0800 | [diff] [blame] | 152 | rX86_ARG1, true); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 153 | } |
| 154 | |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 155 | void X86Codegen::GenMonitorEnter(CompilationUnit* cu, int opt_flags, RegLocation rl_src) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 156 | { |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 157 | FlushAllRegs(cu); |
| 158 | LoadValueDirectFixed(cu, rl_src, rCX); // Get obj |
| 159 | LockCallTemps(cu); // Prepare for explicit register usage |
| 160 | GenNullCheck(cu, rl_src.s_reg_low, rCX, opt_flags); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 161 | // If lock is unheld, try to grab it quickly with compare and exchange |
| 162 | // TODO: copy and clear hash state? |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 163 | NewLIR2(cu, kX86Mov32RT, rDX, Thread::ThinLockIdOffset().Int32Value()); |
| 164 | NewLIR2(cu, kX86Sal32RI, rDX, LW_LOCK_OWNER_SHIFT); |
| 165 | NewLIR2(cu, kX86Xor32RR, rAX, rAX); |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame^] | 166 | NewLIR3(cu, kX86LockCmpxchgMR, rCX, mirror::Object::MonitorOffset().Int32Value(), rDX); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 167 | LIR* branch = NewLIR2(cu, kX86Jcc8, 0, kX86CondEq); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 168 | // If lock is held, go the expensive route - artLockObjectFromCode(self, obj); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 169 | CallRuntimeHelperReg(cu, ENTRYPOINT_OFFSET(pLockObjectFromCode), rCX, true); |
| 170 | branch->target = NewLIR0(cu, kPseudoTargetLabel); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 171 | } |
| 172 | |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 173 | void X86Codegen::GenMonitorExit(CompilationUnit* cu, int opt_flags, RegLocation rl_src) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 174 | { |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 175 | FlushAllRegs(cu); |
| 176 | LoadValueDirectFixed(cu, rl_src, rAX); // Get obj |
| 177 | LockCallTemps(cu); // Prepare for explicit register usage |
| 178 | GenNullCheck(cu, rl_src.s_reg_low, rAX, opt_flags); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 179 | // If lock is held by the current thread, clear it to quickly release it |
| 180 | // TODO: clear hash state? |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 181 | NewLIR2(cu, kX86Mov32RT, rDX, Thread::ThinLockIdOffset().Int32Value()); |
| 182 | NewLIR2(cu, kX86Sal32RI, rDX, LW_LOCK_OWNER_SHIFT); |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame^] | 183 | NewLIR3(cu, kX86Mov32RM, rCX, rAX, mirror::Object::MonitorOffset().Int32Value()); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 184 | OpRegReg(cu, kOpSub, rCX, rDX); |
| 185 | LIR* branch = NewLIR2(cu, kX86Jcc8, 0, kX86CondNe); |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame^] | 186 | NewLIR3(cu, kX86Mov32MR, rAX, mirror::Object::MonitorOffset().Int32Value(), rCX); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 187 | LIR* branch2 = NewLIR1(cu, kX86Jmp8, 0); |
| 188 | branch->target = NewLIR0(cu, kPseudoTargetLabel); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 189 | // Otherwise, go the expensive route - UnlockObjectFromCode(obj); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 190 | CallRuntimeHelperReg(cu, ENTRYPOINT_OFFSET(pUnlockObjectFromCode), rAX, true); |
| 191 | branch2->target = NewLIR0(cu, kPseudoTargetLabel); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 192 | } |
| 193 | |
jeffhao | 1eab958 | 2013-01-22 13:33:52 -0800 | [diff] [blame] | 194 | void X86Codegen::GenMoveException(CompilationUnit* cu, RegLocation rl_dest) |
| 195 | { |
| 196 | int ex_offset = Thread::ExceptionOffset().Int32Value(); |
| 197 | RegLocation rl_result = EvalLoc(cu, rl_dest, kCoreReg, true); |
| 198 | NewLIR2(cu, kX86Mov32RT, rl_result.low_reg, ex_offset); |
| 199 | NewLIR2(cu, kX86Mov32TI, ex_offset, 0); |
| 200 | StoreValue(cu, rl_dest, rl_result); |
| 201 | } |
| 202 | |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 203 | /* |
| 204 | * Mark garbage collection card. Skip if the value we're storing is null. |
| 205 | */ |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 206 | void X86Codegen::MarkGCCard(CompilationUnit* cu, int val_reg, int tgt_addr_reg) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 207 | { |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 208 | int reg_card_base = AllocTemp(cu); |
| 209 | int reg_card_no = AllocTemp(cu); |
| 210 | LIR* branch_over = OpCmpImmBranch(cu, kCondEq, val_reg, 0, NULL); |
| 211 | NewLIR2(cu, kX86Mov32RT, reg_card_base, Thread::CardTableOffset().Int32Value()); |
| 212 | OpRegRegImm(cu, kOpLsr, reg_card_no, tgt_addr_reg, CardTable::kCardShift); |
| 213 | StoreBaseIndexed(cu, reg_card_base, reg_card_no, reg_card_base, 0, |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 214 | kUnsignedByte); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 215 | LIR* target = NewLIR0(cu, kPseudoTargetLabel); |
| 216 | branch_over->target = target; |
| 217 | FreeTemp(cu, reg_card_base); |
| 218 | FreeTemp(cu, reg_card_no); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 219 | } |
| 220 | |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 221 | void X86Codegen::GenEntrySequence(CompilationUnit* cu, RegLocation* ArgLocs, RegLocation rl_method) |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 222 | { |
| 223 | /* |
| 224 | * On entry, rX86_ARG0, rX86_ARG1, rX86_ARG2 are live. Let the register |
| 225 | * allocation mechanism know so it doesn't try to use any of them when |
| 226 | * expanding the frame or flushing. This leaves the utility |
| 227 | * code with no spare temps. |
| 228 | */ |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 229 | LockTemp(cu, rX86_ARG0); |
| 230 | LockTemp(cu, rX86_ARG1); |
| 231 | LockTemp(cu, rX86_ARG2); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 232 | |
| 233 | /* Build frame, return address already on stack */ |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 234 | OpRegImm(cu, kOpSub, rX86_SP, cu->frame_size - 4); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 235 | |
| 236 | /* |
| 237 | * We can safely skip the stack overflow check if we're |
| 238 | * a leaf *and* our frame size < fudge factor. |
| 239 | */ |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 240 | bool skip_overflow_check = ((cu->attrs & METHOD_IS_LEAF) && |
| 241 | (static_cast<size_t>(cu->frame_size) < |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 242 | Thread::kStackOverflowReservedBytes)); |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 243 | NewLIR0(cu, kPseudoMethodEntry); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 244 | /* Spill core callee saves */ |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 245 | SpillCoreRegs(cu); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 246 | /* NOTE: promotion of FP regs currently unsupported, thus no FP spill */ |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 247 | DCHECK_EQ(cu->num_fp_spills, 0); |
| 248 | if (!skip_overflow_check) { |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 249 | // cmp rX86_SP, fs:[stack_end_]; jcc throw_launchpad |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 250 | LIR* tgt = RawLIR(cu, 0, kPseudoThrowTarget, kThrowStackOverflow, 0, 0, 0, 0); |
| 251 | OpRegThreadMem(cu, kOpCmp, rX86_SP, Thread::StackEndOffset().Int32Value()); |
| 252 | OpCondBranch(cu, kCondUlt, tgt); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 253 | // Remember branch target - will process later |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 254 | InsertGrowableList(cu, &cu->throw_launchpads, reinterpret_cast<uintptr_t>(tgt)); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 255 | } |
| 256 | |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 257 | FlushIns(cu, ArgLocs, rl_method); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 258 | |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 259 | FreeTemp(cu, rX86_ARG0); |
| 260 | FreeTemp(cu, rX86_ARG1); |
| 261 | FreeTemp(cu, rX86_ARG2); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 262 | } |
| 263 | |
buzbee | 02031b1 | 2012-11-23 09:41:35 -0800 | [diff] [blame] | 264 | void X86Codegen::GenExitSequence(CompilationUnit* cu) { |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 265 | /* |
| 266 | * In the exit path, rX86_RET0/rX86_RET1 are live - make sure they aren't |
| 267 | * allocated by the register utilities as temps. |
| 268 | */ |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 269 | LockTemp(cu, rX86_RET0); |
| 270 | LockTemp(cu, rX86_RET1); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 271 | |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 272 | NewLIR0(cu, kPseudoMethodExit); |
| 273 | UnSpillCoreRegs(cu); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 274 | /* Remove frame except for return address */ |
buzbee | fa57c47 | 2012-11-21 12:06:18 -0800 | [diff] [blame] | 275 | OpRegImm(cu, kOpAdd, rX86_SP, cu->frame_size - 4); |
| 276 | NewLIR0(cu, kX86Ret); |
buzbee | efc6369 | 2012-11-14 16:31:52 -0800 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | } // namespace art |