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 | |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 29 | // FIXME: restore "static" when usage uncovered |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 30 | /*static*/ int core_regs[] = { |
| 31 | rAX, rCX, rDX, rBX, rX86_SP, rBP, rSI, rDI |
| 32 | #ifdef TARGET_REX_SUPPORT |
| 33 | r8, r9, r10, r11, r12, r13, r14, 15 |
| 34 | #endif |
| 35 | }; |
| 36 | /*static*/ int ReservedRegs[] = {rX86_SP}; |
| 37 | /*static*/ int core_temps[] = {rAX, rCX, rDX, rBX}; |
| 38 | /*static*/ int FpRegs[] = { |
| 39 | fr0, fr1, fr2, fr3, fr4, fr5, fr6, fr7, |
| 40 | #ifdef TARGET_REX_SUPPORT |
| 41 | fr8, fr9, fr10, fr11, fr12, fr13, fr14, fr15 |
| 42 | #endif |
| 43 | }; |
| 44 | /*static*/ int fp_temps[] = { |
| 45 | fr0, fr1, fr2, fr3, fr4, fr5, fr6, fr7, |
| 46 | #ifdef TARGET_REX_SUPPORT |
| 47 | fr8, fr9, fr10, fr11, fr12, fr13, fr14, fr15 |
| 48 | #endif |
| 49 | }; |
| 50 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 51 | RegLocation X86Mir2Lir::LocCReturn() { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 52 | RegLocation res = X86_LOC_C_RETURN; |
| 53 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 54 | } |
| 55 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 56 | RegLocation X86Mir2Lir::LocCReturnWide() { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 57 | RegLocation res = X86_LOC_C_RETURN_WIDE; |
| 58 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 59 | } |
| 60 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 61 | RegLocation X86Mir2Lir::LocCReturnFloat() { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 62 | RegLocation res = X86_LOC_C_RETURN_FLOAT; |
| 63 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 64 | } |
| 65 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 66 | RegLocation X86Mir2Lir::LocCReturnDouble() { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 67 | RegLocation res = X86_LOC_C_RETURN_DOUBLE; |
| 68 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | // Return a target-dependent special register. |
| 72 | int X86Mir2Lir::TargetReg(SpecialTargetRegister reg) { |
| 73 | int res = INVALID_REG; |
| 74 | switch (reg) { |
| 75 | case kSelf: res = rX86_SELF; break; |
| 76 | case kSuspend: res = rX86_SUSPEND; break; |
| 77 | case kLr: res = rX86_LR; break; |
| 78 | case kPc: res = rX86_PC; break; |
| 79 | case kSp: res = rX86_SP; break; |
| 80 | case kArg0: res = rX86_ARG0; break; |
| 81 | case kArg1: res = rX86_ARG1; break; |
| 82 | case kArg2: res = rX86_ARG2; break; |
| 83 | case kArg3: res = rX86_ARG3; break; |
| 84 | case kFArg0: res = rX86_FARG0; break; |
| 85 | case kFArg1: res = rX86_FARG1; break; |
| 86 | case kFArg2: res = rX86_FARG2; break; |
| 87 | case kFArg3: res = rX86_FARG3; break; |
| 88 | case kRet0: res = rX86_RET0; break; |
| 89 | case kRet1: res = rX86_RET1; break; |
| 90 | case kInvokeTgt: res = rX86_INVOKE_TGT; break; |
Jeff Hao | 88474b4 | 2013-10-23 16:24:40 -0700 | [diff] [blame] | 91 | case kHiddenArg: res = rAX; break; |
| 92 | case kHiddenFpArg: res = fr0; break; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 93 | case kCount: res = rX86_COUNT; break; |
| 94 | } |
| 95 | return res; |
| 96 | } |
| 97 | |
Razvan A Lupusoru | 3bc0174 | 2014-02-06 13:18:43 -0800 | [diff] [blame] | 98 | int X86Mir2Lir::GetArgMappingToPhysicalReg(int arg_num) { |
| 99 | // For the 32-bit internal ABI, the first 3 arguments are passed in registers. |
| 100 | // TODO: This is not 64-bit compliant and depends on new internal ABI. |
| 101 | switch (arg_num) { |
| 102 | case 0: |
| 103 | return rX86_ARG1; |
| 104 | case 1: |
| 105 | return rX86_ARG2; |
| 106 | case 2: |
| 107 | return rX86_ARG3; |
| 108 | default: |
| 109 | return INVALID_REG; |
| 110 | } |
| 111 | } |
| 112 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 113 | // Create a double from a pair of singles. |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 114 | int X86Mir2Lir::S2d(int low_reg, int high_reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 115 | return X86_S2D(low_reg, high_reg); |
| 116 | } |
| 117 | |
| 118 | // Return mask to strip off fp reg flags and bias. |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 119 | uint32_t X86Mir2Lir::FpRegMask() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 120 | return X86_FP_REG_MASK; |
| 121 | } |
| 122 | |
| 123 | // True if both regs single, both core or both double. |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 124 | bool X86Mir2Lir::SameRegType(int reg1, int reg2) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 125 | return (X86_REGTYPE(reg1) == X86_REGTYPE(reg2)); |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Decode the register id. |
| 130 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 131 | uint64_t X86Mir2Lir::GetRegMaskCommon(int reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 132 | uint64_t seed; |
| 133 | int shift; |
| 134 | int reg_id; |
| 135 | |
| 136 | reg_id = reg & 0xf; |
| 137 | /* Double registers in x86 are just a single FP register */ |
| 138 | seed = 1; |
| 139 | /* FP register starts at bit position 16 */ |
| 140 | shift = X86_FPREG(reg) ? kX86FPReg0 : 0; |
| 141 | /* Expand the double register id into single offset */ |
| 142 | shift += reg_id; |
| 143 | return (seed << shift); |
| 144 | } |
| 145 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 146 | uint64_t X86Mir2Lir::GetPCUseDefEncoding() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 147 | /* |
| 148 | * FIXME: might make sense to use a virtual resource encoding bit for pc. Might be |
| 149 | * able to clean up some of the x86/Arm_Mips differences |
| 150 | */ |
| 151 | LOG(FATAL) << "Unexpected call to GetPCUseDefEncoding for x86"; |
| 152 | return 0ULL; |
| 153 | } |
| 154 | |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 155 | void X86Mir2Lir::SetupTargetResourceMasks(LIR* lir, uint64_t flags) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 156 | DCHECK_EQ(cu_->instruction_set, kX86); |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 157 | DCHECK(!lir->flags.use_def_invalid); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 158 | |
| 159 | // X86-specific resource map setup here. |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 160 | if (flags & REG_USE_SP) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 161 | lir->u.m.use_mask |= ENCODE_X86_REG_SP; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | if (flags & REG_DEF_SP) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 165 | lir->u.m.def_mask |= ENCODE_X86_REG_SP; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | if (flags & REG_DEFA) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 169 | SetupRegMask(&lir->u.m.def_mask, rAX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | if (flags & REG_DEFD) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 173 | SetupRegMask(&lir->u.m.def_mask, rDX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 174 | } |
| 175 | if (flags & REG_USEA) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 176 | SetupRegMask(&lir->u.m.use_mask, rAX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | if (flags & REG_USEC) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 180 | SetupRegMask(&lir->u.m.use_mask, rCX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | if (flags & REG_USED) { |
buzbee | b48819d | 2013-09-14 16:15:25 -0700 | [diff] [blame] | 184 | SetupRegMask(&lir->u.m.use_mask, rDX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 185 | } |
Vladimir Marko | 70b797d | 2013-12-03 15:25:24 +0000 | [diff] [blame] | 186 | |
| 187 | if (flags & REG_USEB) { |
| 188 | SetupRegMask(&lir->u.m.use_mask, rBX); |
| 189 | } |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 190 | |
| 191 | // Fixup hard to describe instruction: Uses rAX, rCX, rDI; sets rDI. |
| 192 | if (lir->opcode == kX86RepneScasw) { |
| 193 | SetupRegMask(&lir->u.m.use_mask, rAX); |
| 194 | SetupRegMask(&lir->u.m.use_mask, rCX); |
| 195 | SetupRegMask(&lir->u.m.use_mask, rDI); |
| 196 | SetupRegMask(&lir->u.m.def_mask, rDI); |
| 197 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | /* For dumping instructions */ |
| 201 | static const char* x86RegName[] = { |
| 202 | "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", |
| 203 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
| 204 | }; |
| 205 | |
| 206 | static const char* x86CondName[] = { |
| 207 | "O", |
| 208 | "NO", |
| 209 | "B/NAE/C", |
| 210 | "NB/AE/NC", |
| 211 | "Z/EQ", |
| 212 | "NZ/NE", |
| 213 | "BE/NA", |
| 214 | "NBE/A", |
| 215 | "S", |
| 216 | "NS", |
| 217 | "P/PE", |
| 218 | "NP/PO", |
| 219 | "L/NGE", |
| 220 | "NL/GE", |
| 221 | "LE/NG", |
| 222 | "NLE/G" |
| 223 | }; |
| 224 | |
| 225 | /* |
| 226 | * Interpret a format string and build a string no longer than size |
| 227 | * See format key in Assemble.cc. |
| 228 | */ |
| 229 | std::string X86Mir2Lir::BuildInsnString(const char *fmt, LIR *lir, unsigned char* base_addr) { |
| 230 | std::string buf; |
| 231 | size_t i = 0; |
| 232 | size_t fmt_len = strlen(fmt); |
| 233 | while (i < fmt_len) { |
| 234 | if (fmt[i] != '!') { |
| 235 | buf += fmt[i]; |
| 236 | i++; |
| 237 | } else { |
| 238 | i++; |
| 239 | DCHECK_LT(i, fmt_len); |
| 240 | char operand_number_ch = fmt[i]; |
| 241 | i++; |
| 242 | if (operand_number_ch == '!') { |
| 243 | buf += "!"; |
| 244 | } else { |
| 245 | int operand_number = operand_number_ch - '0'; |
| 246 | DCHECK_LT(operand_number, 6); // Expect upto 6 LIR operands. |
| 247 | DCHECK_LT(i, fmt_len); |
| 248 | int operand = lir->operands[operand_number]; |
| 249 | switch (fmt[i]) { |
| 250 | case 'c': |
| 251 | DCHECK_LT(static_cast<size_t>(operand), sizeof(x86CondName)); |
| 252 | buf += x86CondName[operand]; |
| 253 | break; |
| 254 | case 'd': |
| 255 | buf += StringPrintf("%d", operand); |
| 256 | break; |
| 257 | case 'p': { |
buzbee | 0d82948 | 2013-10-11 15:24:55 -0700 | [diff] [blame] | 258 | EmbeddedData *tab_rec = reinterpret_cast<EmbeddedData*>(UnwrapPointer(operand)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 259 | buf += StringPrintf("0x%08x", tab_rec->offset); |
| 260 | break; |
| 261 | } |
| 262 | case 'r': |
| 263 | if (X86_FPREG(operand) || X86_DOUBLEREG(operand)) { |
| 264 | int fp_reg = operand & X86_FP_REG_MASK; |
| 265 | buf += StringPrintf("xmm%d", fp_reg); |
| 266 | } else { |
| 267 | DCHECK_LT(static_cast<size_t>(operand), sizeof(x86RegName)); |
| 268 | buf += x86RegName[operand]; |
| 269 | } |
| 270 | break; |
| 271 | case 't': |
Ian Rogers | 107c31e | 2014-01-23 20:55:29 -0800 | [diff] [blame] | 272 | buf += StringPrintf("0x%08" PRIxPTR " (L%p)", |
| 273 | reinterpret_cast<uintptr_t>(base_addr) + lir->offset + operand, |
| 274 | lir->target); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 275 | break; |
| 276 | default: |
| 277 | buf += StringPrintf("DecodeError '%c'", fmt[i]); |
| 278 | break; |
| 279 | } |
| 280 | i++; |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | return buf; |
| 285 | } |
| 286 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 287 | void X86Mir2Lir::DumpResourceMask(LIR *x86LIR, uint64_t mask, const char *prefix) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 288 | char buf[256]; |
| 289 | buf[0] = 0; |
| 290 | |
| 291 | if (mask == ENCODE_ALL) { |
| 292 | strcpy(buf, "all"); |
| 293 | } else { |
| 294 | char num[8]; |
| 295 | int i; |
| 296 | |
| 297 | for (i = 0; i < kX86RegEnd; i++) { |
| 298 | if (mask & (1ULL << i)) { |
Ian Rogers | 988e6ea | 2014-01-08 11:30:50 -0800 | [diff] [blame] | 299 | snprintf(num, arraysize(num), "%d ", i); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 300 | strcat(buf, num); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | if (mask & ENCODE_CCODE) { |
| 305 | strcat(buf, "cc "); |
| 306 | } |
| 307 | /* Memory bits */ |
| 308 | if (x86LIR && (mask & ENCODE_DALVIK_REG)) { |
Ian Rogers | 988e6ea | 2014-01-08 11:30:50 -0800 | [diff] [blame] | 309 | snprintf(buf + strlen(buf), arraysize(buf) - strlen(buf), "dr%d%s", |
| 310 | DECODE_ALIAS_INFO_REG(x86LIR->flags.alias_info), |
| 311 | (DECODE_ALIAS_INFO_WIDE(x86LIR->flags.alias_info)) ? "(+1)" : ""); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 312 | } |
| 313 | if (mask & ENCODE_LITERAL) { |
| 314 | strcat(buf, "lit "); |
| 315 | } |
| 316 | |
| 317 | if (mask & ENCODE_HEAP_REF) { |
| 318 | strcat(buf, "heap "); |
| 319 | } |
| 320 | if (mask & ENCODE_MUST_NOT_ALIAS) { |
| 321 | strcat(buf, "noalias "); |
| 322 | } |
| 323 | } |
| 324 | if (buf[0]) { |
| 325 | LOG(INFO) << prefix << ": " << buf; |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | void X86Mir2Lir::AdjustSpillMask() { |
| 330 | // Adjustment for LR spilling, x86 has no LR so nothing to do here |
| 331 | core_spill_mask_ |= (1 << rRET); |
| 332 | num_core_spills_++; |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | * Mark a callee-save fp register as promoted. Note that |
| 337 | * vpush/vpop uses contiguous register lists so we must |
| 338 | * include any holes in the mask. Associate holes with |
| 339 | * Dalvik register INVALID_VREG (0xFFFFU). |
| 340 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 341 | void X86Mir2Lir::MarkPreservedSingle(int v_reg, int reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 342 | UNIMPLEMENTED(WARNING) << "MarkPreservedSingle"; |
| 343 | #if 0 |
| 344 | LOG(FATAL) << "No support yet for promoted FP regs"; |
| 345 | #endif |
| 346 | } |
| 347 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 348 | void X86Mir2Lir::FlushRegWide(int reg1, int reg2) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 349 | RegisterInfo* info1 = GetRegInfo(reg1); |
| 350 | RegisterInfo* info2 = GetRegInfo(reg2); |
| 351 | DCHECK(info1 && info2 && info1->pair && info2->pair && |
| 352 | (info1->partner == info2->reg) && |
| 353 | (info2->partner == info1->reg)); |
| 354 | if ((info1->live && info1->dirty) || (info2->live && info2->dirty)) { |
| 355 | if (!(info1->is_temp && info2->is_temp)) { |
| 356 | /* Should not happen. If it does, there's a problem in eval_loc */ |
| 357 | LOG(FATAL) << "Long half-temp, half-promoted"; |
| 358 | } |
| 359 | |
| 360 | info1->dirty = false; |
| 361 | info2->dirty = false; |
| 362 | if (mir_graph_->SRegToVReg(info2->s_reg) < mir_graph_->SRegToVReg(info1->s_reg)) |
| 363 | info1 = info2; |
| 364 | int v_reg = mir_graph_->SRegToVReg(info1->s_reg); |
| 365 | StoreBaseDispWide(rX86_SP, VRegOffset(v_reg), info1->reg, info1->partner); |
| 366 | } |
| 367 | } |
| 368 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 369 | void X86Mir2Lir::FlushReg(int reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 370 | RegisterInfo* info = GetRegInfo(reg); |
| 371 | if (info->live && info->dirty) { |
| 372 | info->dirty = false; |
| 373 | int v_reg = mir_graph_->SRegToVReg(info->s_reg); |
| 374 | StoreBaseDisp(rX86_SP, VRegOffset(v_reg), reg, kWord); |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | /* Give access to the target-dependent FP register encoding to common code */ |
| 379 | bool X86Mir2Lir::IsFpReg(int reg) { |
| 380 | return X86_FPREG(reg); |
| 381 | } |
| 382 | |
| 383 | /* Clobber all regs that might be used by an external C call */ |
Vladimir Marko | 31c2aac | 2013-12-09 16:31:19 +0000 | [diff] [blame] | 384 | void X86Mir2Lir::ClobberCallerSave() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 385 | Clobber(rAX); |
| 386 | Clobber(rCX); |
| 387 | Clobber(rDX); |
Vladimir Marko | 31c2aac | 2013-12-09 16:31:19 +0000 | [diff] [blame] | 388 | Clobber(rBX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | RegLocation X86Mir2Lir::GetReturnWideAlt() { |
| 392 | RegLocation res = LocCReturnWide(); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 393 | CHECK(res.low_reg == rAX); |
| 394 | CHECK(res.high_reg == rDX); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 395 | Clobber(rAX); |
| 396 | Clobber(rDX); |
| 397 | MarkInUse(rAX); |
| 398 | MarkInUse(rDX); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 399 | MarkPair(res.low_reg, res.high_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 400 | return res; |
| 401 | } |
| 402 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 403 | RegLocation X86Mir2Lir::GetReturnAlt() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 404 | RegLocation res = LocCReturn(); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 405 | res.low_reg = rDX; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 406 | Clobber(rDX); |
| 407 | MarkInUse(rDX); |
| 408 | return res; |
| 409 | } |
| 410 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 411 | /* To be used when explicitly managing register use */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 412 | void X86Mir2Lir::LockCallTemps() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 413 | LockTemp(rX86_ARG0); |
| 414 | LockTemp(rX86_ARG1); |
| 415 | LockTemp(rX86_ARG2); |
| 416 | LockTemp(rX86_ARG3); |
| 417 | } |
| 418 | |
| 419 | /* To be used when explicitly managing register use */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 420 | void X86Mir2Lir::FreeCallTemps() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 421 | FreeTemp(rX86_ARG0); |
| 422 | FreeTemp(rX86_ARG1); |
| 423 | FreeTemp(rX86_ARG2); |
| 424 | FreeTemp(rX86_ARG3); |
| 425 | } |
| 426 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 427 | void X86Mir2Lir::GenMemBarrier(MemBarrierKind barrier_kind) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 428 | #if ANDROID_SMP != 0 |
| 429 | // TODO: optimize fences |
| 430 | NewLIR0(kX86Mfence); |
| 431 | #endif |
| 432 | } |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 433 | /* |
| 434 | * Alloc a pair of core registers, or a double. Low reg in low byte, |
| 435 | * high reg in next byte. |
| 436 | */ |
| 437 | int X86Mir2Lir::AllocTypedTempPair(bool fp_hint, |
| 438 | int reg_class) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 439 | int high_reg; |
| 440 | int low_reg; |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 441 | int res = 0; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 442 | |
| 443 | if (((reg_class == kAnyReg) && fp_hint) || (reg_class == kFPReg)) { |
| 444 | low_reg = AllocTempDouble(); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 445 | high_reg = low_reg; // only one allocated! |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 446 | res = (low_reg & 0xff) | ((high_reg & 0xff) << 8); |
| 447 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 448 | } |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 449 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 450 | low_reg = AllocTemp(); |
| 451 | high_reg = AllocTemp(); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 452 | res = (low_reg & 0xff) | ((high_reg & 0xff) << 8); |
| 453 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | int X86Mir2Lir::AllocTypedTemp(bool fp_hint, int reg_class) { |
| 457 | if (((reg_class == kAnyReg) && fp_hint) || (reg_class == kFPReg)) { |
| 458 | return AllocTempFloat(); |
| 459 | } |
| 460 | return AllocTemp(); |
| 461 | } |
| 462 | |
| 463 | void X86Mir2Lir::CompilerInitializeRegAlloc() { |
| 464 | int num_regs = sizeof(core_regs)/sizeof(*core_regs); |
| 465 | int num_reserved = sizeof(ReservedRegs)/sizeof(*ReservedRegs); |
| 466 | int num_temps = sizeof(core_temps)/sizeof(*core_temps); |
| 467 | int num_fp_regs = sizeof(FpRegs)/sizeof(*FpRegs); |
| 468 | int num_fp_temps = sizeof(fp_temps)/sizeof(*fp_temps); |
Mathieu Chartier | f6c4b3b | 2013-08-24 16:11:37 -0700 | [diff] [blame] | 469 | reg_pool_ = static_cast<RegisterPool*>(arena_->Alloc(sizeof(*reg_pool_), |
| 470 | ArenaAllocator::kAllocRegAlloc)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 471 | reg_pool_->num_core_regs = num_regs; |
| 472 | reg_pool_->core_regs = |
Mathieu Chartier | f6c4b3b | 2013-08-24 16:11:37 -0700 | [diff] [blame] | 473 | static_cast<RegisterInfo*>(arena_->Alloc(num_regs * sizeof(*reg_pool_->core_regs), |
| 474 | ArenaAllocator::kAllocRegAlloc)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 475 | reg_pool_->num_fp_regs = num_fp_regs; |
| 476 | reg_pool_->FPRegs = |
Mathieu Chartier | f6c4b3b | 2013-08-24 16:11:37 -0700 | [diff] [blame] | 477 | static_cast<RegisterInfo *>(arena_->Alloc(num_fp_regs * sizeof(*reg_pool_->FPRegs), |
| 478 | ArenaAllocator::kAllocRegAlloc)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 479 | CompilerInitPool(reg_pool_->core_regs, core_regs, reg_pool_->num_core_regs); |
| 480 | CompilerInitPool(reg_pool_->FPRegs, FpRegs, reg_pool_->num_fp_regs); |
| 481 | // Keep special registers from being allocated |
| 482 | for (int i = 0; i < num_reserved; i++) { |
| 483 | MarkInUse(ReservedRegs[i]); |
| 484 | } |
| 485 | // Mark temp regs - all others not in use can be used for promotion |
| 486 | for (int i = 0; i < num_temps; i++) { |
| 487 | MarkTemp(core_temps[i]); |
| 488 | } |
| 489 | for (int i = 0; i < num_fp_temps; i++) { |
| 490 | MarkTemp(fp_temps[i]); |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | void X86Mir2Lir::FreeRegLocTemps(RegLocation rl_keep, |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 495 | RegLocation rl_free) { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 496 | if ((rl_free.low_reg != rl_keep.low_reg) && (rl_free.low_reg != rl_keep.high_reg) && |
| 497 | (rl_free.high_reg != rl_keep.low_reg) && (rl_free.high_reg != rl_keep.high_reg)) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 498 | // No overlap, free both |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 499 | FreeTemp(rl_free.low_reg); |
| 500 | FreeTemp(rl_free.high_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 501 | } |
| 502 | } |
| 503 | |
| 504 | void X86Mir2Lir::SpillCoreRegs() { |
| 505 | if (num_core_spills_ == 0) { |
| 506 | return; |
| 507 | } |
| 508 | // Spill mask not including fake return address register |
| 509 | uint32_t mask = core_spill_mask_ & ~(1 << rRET); |
| 510 | int offset = frame_size_ - (4 * num_core_spills_); |
| 511 | for (int reg = 0; mask; mask >>= 1, reg++) { |
| 512 | if (mask & 0x1) { |
| 513 | StoreWordDisp(rX86_SP, offset, reg); |
| 514 | offset += 4; |
| 515 | } |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | void X86Mir2Lir::UnSpillCoreRegs() { |
| 520 | if (num_core_spills_ == 0) { |
| 521 | return; |
| 522 | } |
| 523 | // Spill mask not including fake return address register |
| 524 | uint32_t mask = core_spill_mask_ & ~(1 << rRET); |
| 525 | int offset = frame_size_ - (4 * num_core_spills_); |
| 526 | for (int reg = 0; mask; mask >>= 1, reg++) { |
| 527 | if (mask & 0x1) { |
| 528 | LoadWordDisp(rX86_SP, offset, reg); |
| 529 | offset += 4; |
| 530 | } |
| 531 | } |
| 532 | } |
| 533 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 534 | bool X86Mir2Lir::IsUnconditionalBranch(LIR* lir) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 535 | return (lir->opcode == kX86Jmp8 || lir->opcode == kX86Jmp32); |
| 536 | } |
| 537 | |
| 538 | X86Mir2Lir::X86Mir2Lir(CompilationUnit* cu, MIRGraph* mir_graph, ArenaAllocator* arena) |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 539 | : Mir2Lir(cu, mir_graph, arena), |
| 540 | method_address_insns_(arena, 100, kGrowableArrayMisc), |
| 541 | class_type_address_insns_(arena, 100, kGrowableArrayMisc), |
| 542 | call_method_insns_(arena, 100, kGrowableArrayMisc) { |
| 543 | store_method_addr_used_ = false; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 544 | for (int i = 0; i < kX86Last; i++) { |
| 545 | if (X86Mir2Lir::EncodingMap[i].opcode != i) { |
| 546 | LOG(FATAL) << "Encoding order for " << X86Mir2Lir::EncodingMap[i].name |
| 547 | << " is wrong: expecting " << i << ", seeing " |
| 548 | << static_cast<int>(X86Mir2Lir::EncodingMap[i].opcode); |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | Mir2Lir* X86CodeGenerator(CompilationUnit* const cu, MIRGraph* const mir_graph, |
| 554 | ArenaAllocator* const arena) { |
| 555 | return new X86Mir2Lir(cu, mir_graph, arena); |
| 556 | } |
| 557 | |
| 558 | // Not used in x86 |
Ian Rogers | 468532e | 2013-08-05 10:56:33 -0700 | [diff] [blame] | 559 | int X86Mir2Lir::LoadHelper(ThreadOffset offset) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 560 | LOG(FATAL) << "Unexpected use of LoadHelper in x86"; |
| 561 | return INVALID_REG; |
| 562 | } |
| 563 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 564 | uint64_t X86Mir2Lir::GetTargetInstFlags(int opcode) { |
buzbee | 409fe94 | 2013-10-11 10:49:56 -0700 | [diff] [blame] | 565 | DCHECK(!IsPseudoLirOp(opcode)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 566 | return X86Mir2Lir::EncodingMap[opcode].flags; |
| 567 | } |
| 568 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 569 | const char* X86Mir2Lir::GetTargetInstName(int opcode) { |
buzbee | 409fe94 | 2013-10-11 10:49:56 -0700 | [diff] [blame] | 570 | DCHECK(!IsPseudoLirOp(opcode)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 571 | return X86Mir2Lir::EncodingMap[opcode].name; |
| 572 | } |
| 573 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 574 | const char* X86Mir2Lir::GetTargetInstFmt(int opcode) { |
buzbee | 409fe94 | 2013-10-11 10:49:56 -0700 | [diff] [blame] | 575 | DCHECK(!IsPseudoLirOp(opcode)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 576 | return X86Mir2Lir::EncodingMap[opcode].fmt; |
| 577 | } |
| 578 | |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 579 | /* |
| 580 | * Return an updated location record with current in-register status. |
| 581 | * If the value lives in live temps, reflect that fact. No code |
| 582 | * is generated. If the live value is part of an older pair, |
| 583 | * clobber both low and high. |
| 584 | */ |
| 585 | // TODO: Reunify with common code after 'pair mess' has been fixed |
| 586 | RegLocation X86Mir2Lir::UpdateLocWide(RegLocation loc) { |
| 587 | DCHECK(loc.wide); |
| 588 | DCHECK(CheckCorePoolSanity()); |
| 589 | if (loc.location != kLocPhysReg) { |
| 590 | DCHECK((loc.location == kLocDalvikFrame) || |
| 591 | (loc.location == kLocCompilerTemp)); |
| 592 | // Are the dalvik regs already live in physical registers? |
| 593 | RegisterInfo* info_lo = AllocLive(loc.s_reg_low, kAnyReg); |
| 594 | |
| 595 | // Handle FP registers specially on x86. |
| 596 | if (info_lo && IsFpReg(info_lo->reg)) { |
| 597 | bool match = true; |
| 598 | |
| 599 | // We can't match a FP register with a pair of Core registers. |
| 600 | match = match && (info_lo->pair == 0); |
| 601 | |
| 602 | if (match) { |
| 603 | // We can reuse;update the register usage info. |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 604 | loc.low_reg = info_lo->reg; |
| 605 | loc.high_reg = info_lo->reg; // Play nice with existing code. |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 606 | loc.location = kLocPhysReg; |
| 607 | loc.vec_len = kVectorLength8; |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 608 | DCHECK(IsFpReg(loc.low_reg)); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 609 | return loc; |
| 610 | } |
| 611 | // We can't easily reuse; clobber and free any overlaps. |
| 612 | if (info_lo) { |
| 613 | Clobber(info_lo->reg); |
| 614 | FreeTemp(info_lo->reg); |
| 615 | if (info_lo->pair) |
| 616 | Clobber(info_lo->partner); |
| 617 | } |
| 618 | } else { |
| 619 | RegisterInfo* info_hi = AllocLive(GetSRegHi(loc.s_reg_low), kAnyReg); |
| 620 | bool match = true; |
| 621 | match = match && (info_lo != NULL); |
| 622 | match = match && (info_hi != NULL); |
| 623 | // Are they both core or both FP? |
| 624 | match = match && (IsFpReg(info_lo->reg) == IsFpReg(info_hi->reg)); |
| 625 | // If a pair of floating point singles, are they properly aligned? |
| 626 | if (match && IsFpReg(info_lo->reg)) { |
| 627 | match &= ((info_lo->reg & 0x1) == 0); |
| 628 | match &= ((info_hi->reg - info_lo->reg) == 1); |
| 629 | } |
| 630 | // If previously used as a pair, it is the same pair? |
| 631 | if (match && (info_lo->pair || info_hi->pair)) { |
| 632 | match = (info_lo->pair == info_hi->pair); |
| 633 | match &= ((info_lo->reg == info_hi->partner) && |
| 634 | (info_hi->reg == info_lo->partner)); |
| 635 | } |
| 636 | if (match) { |
| 637 | // Can reuse - update the register usage info |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 638 | loc.low_reg = info_lo->reg; |
| 639 | loc.high_reg = info_hi->reg; |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 640 | loc.location = kLocPhysReg; |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 641 | MarkPair(loc.low_reg, loc.high_reg); |
| 642 | DCHECK(!IsFpReg(loc.low_reg) || ((loc.low_reg & 0x1) == 0)); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 643 | return loc; |
| 644 | } |
| 645 | // Can't easily reuse - clobber and free any overlaps |
| 646 | if (info_lo) { |
| 647 | Clobber(info_lo->reg); |
| 648 | FreeTemp(info_lo->reg); |
| 649 | if (info_lo->pair) |
| 650 | Clobber(info_lo->partner); |
| 651 | } |
| 652 | if (info_hi) { |
| 653 | Clobber(info_hi->reg); |
| 654 | FreeTemp(info_hi->reg); |
| 655 | if (info_hi->pair) |
| 656 | Clobber(info_hi->partner); |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | return loc; |
| 661 | } |
| 662 | |
| 663 | // TODO: Reunify with common code after 'pair mess' has been fixed |
| 664 | RegLocation X86Mir2Lir::EvalLocWide(RegLocation loc, int reg_class, bool update) { |
| 665 | DCHECK(loc.wide); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 666 | int32_t new_regs; |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 667 | int32_t low_reg; |
| 668 | int32_t high_reg; |
| 669 | |
| 670 | loc = UpdateLocWide(loc); |
| 671 | |
| 672 | /* If it is already in a register, we can assume proper form. Is it the right reg class? */ |
| 673 | if (loc.location == kLocPhysReg) { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 674 | DCHECK_EQ(IsFpReg(loc.low_reg), loc.IsVectorScalar()); |
| 675 | if (!RegClassMatches(reg_class, loc.low_reg)) { |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 676 | /* It is the wrong register class. Reallocate and copy. */ |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 677 | if (!IsFpReg(loc.low_reg)) { |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 678 | // We want this in a FP reg, and it is in core registers. |
| 679 | DCHECK(reg_class != kCoreReg); |
| 680 | // Allocate this into any FP reg, and mark it with the right size. |
| 681 | low_reg = AllocTypedTemp(true, reg_class); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 682 | OpVectorRegCopyWide(low_reg, loc.low_reg, loc.high_reg); |
| 683 | CopyRegInfo(low_reg, loc.low_reg); |
| 684 | Clobber(loc.low_reg); |
| 685 | Clobber(loc.high_reg); |
| 686 | loc.low_reg = low_reg; |
| 687 | loc.high_reg = low_reg; // Play nice with existing code. |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 688 | loc.vec_len = kVectorLength8; |
| 689 | } else { |
| 690 | // The value is in a FP register, and we want it in a pair of core registers. |
| 691 | DCHECK_EQ(reg_class, kCoreReg); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 692 | DCHECK_EQ(loc.low_reg, loc.high_reg); |
| 693 | new_regs = AllocTypedTempPair(false, kCoreReg); // Force to core registers. |
| 694 | low_reg = new_regs & 0xff; |
| 695 | high_reg = (new_regs >> 8) & 0xff; |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 696 | DCHECK_NE(low_reg, high_reg); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 697 | OpRegCopyWide(low_reg, high_reg, loc.low_reg, loc.high_reg); |
| 698 | CopyRegInfo(low_reg, loc.low_reg); |
| 699 | CopyRegInfo(high_reg, loc.high_reg); |
| 700 | Clobber(loc.low_reg); |
| 701 | Clobber(loc.high_reg); |
| 702 | loc.low_reg = low_reg; |
| 703 | loc.high_reg = high_reg; |
| 704 | MarkPair(loc.low_reg, loc.high_reg); |
| 705 | DCHECK(!IsFpReg(loc.low_reg) || ((loc.low_reg & 0x1) == 0)); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 706 | } |
| 707 | } |
| 708 | return loc; |
| 709 | } |
| 710 | |
| 711 | DCHECK_NE(loc.s_reg_low, INVALID_SREG); |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 712 | DCHECK_NE(GetSRegHi(loc.s_reg_low), INVALID_SREG); |
| 713 | |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 714 | new_regs = AllocTypedTempPair(loc.fp, reg_class); |
| 715 | loc.low_reg = new_regs & 0xff; |
| 716 | loc.high_reg = (new_regs >> 8) & 0xff; |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 717 | |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 718 | if (loc.low_reg == loc.high_reg) { |
| 719 | DCHECK(IsFpReg(loc.low_reg)); |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 720 | loc.vec_len = kVectorLength8; |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 721 | } else { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 722 | MarkPair(loc.low_reg, loc.high_reg); |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 723 | } |
| 724 | if (update) { |
| 725 | loc.location = kLocPhysReg; |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 726 | MarkLive(loc.low_reg, loc.s_reg_low); |
| 727 | if (loc.low_reg != loc.high_reg) { |
| 728 | MarkLive(loc.high_reg, GetSRegHi(loc.s_reg_low)); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 729 | } |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 730 | } |
| 731 | return loc; |
| 732 | } |
| 733 | |
| 734 | // TODO: Reunify with common code after 'pair mess' has been fixed |
| 735 | RegLocation X86Mir2Lir::EvalLoc(RegLocation loc, int reg_class, bool update) { |
| 736 | int new_reg; |
| 737 | |
| 738 | if (loc.wide) |
| 739 | return EvalLocWide(loc, reg_class, update); |
| 740 | |
| 741 | loc = UpdateLoc(loc); |
| 742 | |
| 743 | if (loc.location == kLocPhysReg) { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 744 | if (!RegClassMatches(reg_class, loc.low_reg)) { |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 745 | /* Wrong register class. Realloc, copy and transfer ownership. */ |
| 746 | new_reg = AllocTypedTemp(loc.fp, reg_class); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 747 | OpRegCopy(new_reg, loc.low_reg); |
| 748 | CopyRegInfo(new_reg, loc.low_reg); |
| 749 | Clobber(loc.low_reg); |
| 750 | loc.low_reg = new_reg; |
| 751 | if (IsFpReg(loc.low_reg) && reg_class != kCoreReg) |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 752 | loc.vec_len = kVectorLength4; |
| 753 | } |
| 754 | return loc; |
| 755 | } |
| 756 | |
| 757 | DCHECK_NE(loc.s_reg_low, INVALID_SREG); |
| 758 | |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 759 | new_reg = AllocTypedTemp(loc.fp, reg_class); |
| 760 | loc.low_reg = new_reg; |
| 761 | if (IsFpReg(loc.low_reg) && reg_class != kCoreReg) |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 762 | loc.vec_len = kVectorLength4; |
| 763 | |
| 764 | if (update) { |
| 765 | loc.location = kLocPhysReg; |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 766 | MarkLive(loc.low_reg, loc.s_reg_low); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 767 | } |
| 768 | return loc; |
| 769 | } |
| 770 | |
| 771 | int X86Mir2Lir::AllocTempDouble() { |
| 772 | // We really don't need a pair of registers. |
| 773 | return AllocTempFloat(); |
| 774 | } |
| 775 | |
| 776 | // TODO: Reunify with common code after 'pair mess' has been fixed |
| 777 | void X86Mir2Lir::ResetDefLocWide(RegLocation rl) { |
| 778 | DCHECK(rl.wide); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 779 | RegisterInfo* p_low = IsTemp(rl.low_reg); |
| 780 | if (IsFpReg(rl.low_reg)) { |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 781 | // We are using only the low register. |
| 782 | if (p_low && !(cu_->disable_opt & (1 << kSuppressLoads))) { |
| 783 | NullifyRange(p_low->def_start, p_low->def_end, p_low->s_reg, rl.s_reg_low); |
| 784 | } |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 785 | ResetDef(rl.low_reg); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 786 | } else { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 787 | RegisterInfo* p_high = IsTemp(rl.high_reg); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 788 | if (p_low && !(cu_->disable_opt & (1 << kSuppressLoads))) { |
| 789 | DCHECK(p_low->pair); |
| 790 | NullifyRange(p_low->def_start, p_low->def_end, p_low->s_reg, rl.s_reg_low); |
| 791 | } |
| 792 | if (p_high && !(cu_->disable_opt & (1 << kSuppressLoads))) { |
| 793 | DCHECK(p_high->pair); |
| 794 | } |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 795 | ResetDef(rl.low_reg); |
| 796 | ResetDef(rl.high_reg); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 797 | } |
| 798 | } |
| 799 | |
| 800 | void X86Mir2Lir::GenConstWide(RegLocation rl_dest, int64_t value) { |
| 801 | // Can we do this directly to memory? |
| 802 | rl_dest = UpdateLocWide(rl_dest); |
| 803 | if ((rl_dest.location == kLocDalvikFrame) || |
| 804 | (rl_dest.location == kLocCompilerTemp)) { |
| 805 | int32_t val_lo = Low32Bits(value); |
| 806 | int32_t val_hi = High32Bits(value); |
| 807 | int rBase = TargetReg(kSp); |
| 808 | int displacement = SRegOffset(rl_dest.s_reg_low); |
| 809 | |
| 810 | LIR * store = NewLIR3(kX86Mov32MI, rBase, displacement + LOWORD_OFFSET, val_lo); |
| 811 | AnnotateDalvikRegAccess(store, (displacement + LOWORD_OFFSET) >> 2, |
| 812 | false /* is_load */, true /* is64bit */); |
| 813 | store = NewLIR3(kX86Mov32MI, rBase, displacement + HIWORD_OFFSET, val_hi); |
| 814 | AnnotateDalvikRegAccess(store, (displacement + HIWORD_OFFSET) >> 2, |
| 815 | false /* is_load */, true /* is64bit */); |
| 816 | return; |
| 817 | } |
| 818 | |
| 819 | // Just use the standard code to do the generation. |
| 820 | Mir2Lir::GenConstWide(rl_dest, value); |
| 821 | } |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 822 | |
| 823 | // TODO: Merge with existing RegLocation dumper in vreg_analysis.cc |
| 824 | void X86Mir2Lir::DumpRegLocation(RegLocation loc) { |
| 825 | LOG(INFO) << "location: " << loc.location << ',' |
| 826 | << (loc.wide ? " w" : " ") |
| 827 | << (loc.defined ? " D" : " ") |
| 828 | << (loc.is_const ? " c" : " ") |
| 829 | << (loc.fp ? " F" : " ") |
| 830 | << (loc.core ? " C" : " ") |
| 831 | << (loc.ref ? " r" : " ") |
| 832 | << (loc.high_word ? " h" : " ") |
| 833 | << (loc.home ? " H" : " ") |
| 834 | << " vec_len: " << loc.vec_len |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 835 | << ", low: " << static_cast<int>(loc.low_reg) |
| 836 | << ", high: " << static_cast<int>(loc.high_reg) |
Mark Mendell | e02d48f | 2014-01-15 11:19:23 -0800 | [diff] [blame] | 837 | << ", s_reg: " << loc.s_reg_low |
| 838 | << ", orig: " << loc.orig_sreg; |
| 839 | } |
| 840 | |
Mark Mendell | 67c39c4 | 2014-01-31 17:28:00 -0800 | [diff] [blame] | 841 | void X86Mir2Lir::Materialize() { |
| 842 | // A good place to put the analysis before starting. |
| 843 | AnalyzeMIR(); |
| 844 | |
| 845 | // Now continue with regular code generation. |
| 846 | Mir2Lir::Materialize(); |
| 847 | } |
| 848 | |
Mark Mendell | 55d0eac | 2014-02-06 11:02:52 -0800 | [diff] [blame] | 849 | void X86Mir2Lir::LoadMethodAddress(int dex_method_index, InvokeType type, |
| 850 | SpecialTargetRegister symbolic_reg) { |
| 851 | /* |
| 852 | * For x86, just generate a 32 bit move immediate instruction, that will be filled |
| 853 | * in at 'link time'. For now, put a unique value based on target to ensure that |
| 854 | * code deduplication works. |
| 855 | */ |
| 856 | const DexFile::MethodId& id = cu_->dex_file->GetMethodId(dex_method_index); |
| 857 | uintptr_t ptr = reinterpret_cast<uintptr_t>(&id); |
| 858 | |
| 859 | // Generate the move instruction with the unique pointer and save index and type. |
| 860 | LIR *move = RawLIR(current_dalvik_offset_, kX86Mov32RI, TargetReg(symbolic_reg), |
| 861 | static_cast<int>(ptr), dex_method_index, type); |
| 862 | AppendLIR(move); |
| 863 | method_address_insns_.Insert(move); |
| 864 | } |
| 865 | |
| 866 | void X86Mir2Lir::LoadClassType(uint32_t type_idx, SpecialTargetRegister symbolic_reg) { |
| 867 | /* |
| 868 | * For x86, just generate a 32 bit move immediate instruction, that will be filled |
| 869 | * in at 'link time'. For now, put a unique value based on target to ensure that |
| 870 | * code deduplication works. |
| 871 | */ |
| 872 | const DexFile::TypeId& id = cu_->dex_file->GetTypeId(type_idx); |
| 873 | uintptr_t ptr = reinterpret_cast<uintptr_t>(&id); |
| 874 | |
| 875 | // Generate the move instruction with the unique pointer and save index and type. |
| 876 | LIR *move = RawLIR(current_dalvik_offset_, kX86Mov32RI, TargetReg(symbolic_reg), |
| 877 | static_cast<int>(ptr), type_idx); |
| 878 | AppendLIR(move); |
| 879 | class_type_address_insns_.Insert(move); |
| 880 | } |
| 881 | |
| 882 | LIR *X86Mir2Lir::CallWithLinkerFixup(int dex_method_index, InvokeType type) { |
| 883 | /* |
| 884 | * For x86, just generate a 32 bit call relative instruction, that will be filled |
| 885 | * in at 'link time'. For now, put a unique value based on target to ensure that |
| 886 | * code deduplication works. |
| 887 | */ |
| 888 | const DexFile::MethodId& id = cu_->dex_file->GetMethodId(dex_method_index); |
| 889 | uintptr_t ptr = reinterpret_cast<uintptr_t>(&id); |
| 890 | |
| 891 | // Generate the call instruction with the unique pointer and save index and type. |
| 892 | LIR *call = RawLIR(current_dalvik_offset_, kX86CallI, static_cast<int>(ptr), dex_method_index, |
| 893 | type); |
| 894 | AppendLIR(call); |
| 895 | call_method_insns_.Insert(call); |
| 896 | return call; |
| 897 | } |
| 898 | |
| 899 | void X86Mir2Lir::InstallLiteralPools() { |
| 900 | // These are handled differently for x86. |
| 901 | DCHECK(code_literal_list_ == nullptr); |
| 902 | DCHECK(method_literal_list_ == nullptr); |
| 903 | DCHECK(class_literal_list_ == nullptr); |
| 904 | |
| 905 | // Handle the fixups for methods. |
| 906 | for (uint32_t i = 0; i < method_address_insns_.Size(); i++) { |
| 907 | LIR* p = method_address_insns_.Get(i); |
| 908 | DCHECK_EQ(p->opcode, kX86Mov32RI); |
| 909 | uint32_t target = p->operands[2]; |
| 910 | |
| 911 | // The offset to patch is the last 4 bytes of the instruction. |
| 912 | int patch_offset = p->offset + p->flags.size - 4; |
| 913 | cu_->compiler_driver->AddMethodPatch(cu_->dex_file, cu_->class_def_idx, |
| 914 | cu_->method_idx, cu_->invoke_type, |
| 915 | target, static_cast<InvokeType>(p->operands[3]), |
| 916 | patch_offset); |
| 917 | } |
| 918 | |
| 919 | // Handle the fixups for class types. |
| 920 | for (uint32_t i = 0; i < class_type_address_insns_.Size(); i++) { |
| 921 | LIR* p = class_type_address_insns_.Get(i); |
| 922 | DCHECK_EQ(p->opcode, kX86Mov32RI); |
| 923 | uint32_t target = p->operands[2]; |
| 924 | |
| 925 | // The offset to patch is the last 4 bytes of the instruction. |
| 926 | int patch_offset = p->offset + p->flags.size - 4; |
| 927 | cu_->compiler_driver->AddClassPatch(cu_->dex_file, cu_->class_def_idx, |
| 928 | cu_->method_idx, target, patch_offset); |
| 929 | } |
| 930 | |
| 931 | // And now the PC-relative calls to methods. |
| 932 | for (uint32_t i = 0; i < call_method_insns_.Size(); i++) { |
| 933 | LIR* p = call_method_insns_.Get(i); |
| 934 | DCHECK_EQ(p->opcode, kX86CallI); |
| 935 | uint32_t target = p->operands[1]; |
| 936 | |
| 937 | // The offset to patch is the last 4 bytes of the instruction. |
| 938 | int patch_offset = p->offset + p->flags.size - 4; |
| 939 | cu_->compiler_driver->AddRelativeCodePatch(cu_->dex_file, cu_->class_def_idx, |
| 940 | cu_->method_idx, cu_->invoke_type, target, |
| 941 | static_cast<InvokeType>(p->operands[2]), |
| 942 | patch_offset, -4 /* offset */); |
| 943 | } |
| 944 | |
| 945 | // And do the normal processing. |
| 946 | Mir2Lir::InstallLiteralPools(); |
| 947 | } |
| 948 | |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 949 | /* |
| 950 | * Fast string.index_of(I) & (II). Inline check for simple case of char <= 0xffff, |
| 951 | * otherwise bails to standard library code. |
| 952 | */ |
| 953 | bool X86Mir2Lir::GenInlinedIndexOf(CallInfo* info, bool zero_based) { |
| 954 | ClobberCallerSave(); |
| 955 | LockCallTemps(); // Using fixed registers |
| 956 | |
| 957 | // EAX: 16 bit character being searched. |
| 958 | // ECX: count: number of words to be searched. |
| 959 | // EDI: String being searched. |
| 960 | // EDX: temporary during execution. |
| 961 | // EBX: temporary during execution. |
| 962 | |
| 963 | RegLocation rl_obj = info->args[0]; |
| 964 | RegLocation rl_char = info->args[1]; |
| 965 | RegLocation rl_start = info->args[2]; |
| 966 | |
| 967 | uint32_t char_value = |
| 968 | rl_char.is_const ? mir_graph_->ConstantValue(rl_char.orig_sreg) : 0; |
| 969 | |
| 970 | if (char_value > 0xFFFF) { |
| 971 | // We have to punt to the real String.indexOf. |
| 972 | return false; |
| 973 | } |
| 974 | |
| 975 | // Okay, we are commited to inlining this. |
| 976 | RegLocation rl_return = GetReturn(false); |
| 977 | RegLocation rl_dest = InlineTarget(info); |
| 978 | |
| 979 | // Is the string non-NULL? |
| 980 | LoadValueDirectFixed(rl_obj, rDX); |
| 981 | GenNullCheck(rl_obj.s_reg_low, rDX, info->opt_flags); |
| 982 | |
| 983 | // Record that we have inlined & null checked the object. |
| 984 | info->opt_flags |= (MIR_INLINED | MIR_IGNORE_NULL_CHECK); |
| 985 | |
| 986 | // Does the character fit in 16 bits? |
| 987 | LIR* launch_pad = nullptr; |
| 988 | if (rl_char.is_const) { |
| 989 | // We need the value in EAX. |
| 990 | LoadConstantNoClobber(rAX, char_value); |
| 991 | } else { |
| 992 | // Character is not a constant; compare at runtime. |
| 993 | LoadValueDirectFixed(rl_char, rAX); |
| 994 | launch_pad = RawLIR(0, kPseudoIntrinsicRetry, WrapPointer(info)); |
| 995 | intrinsic_launchpads_.Insert(launch_pad); |
| 996 | OpCmpImmBranch(kCondGt, rAX, 0xFFFF, launch_pad); |
| 997 | } |
| 998 | |
| 999 | // 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] | 1000 | // Location of reference to data array within the String object. |
| 1001 | int value_offset = mirror::String::ValueOffset().Int32Value(); |
| 1002 | // Location of count within the String object. |
| 1003 | int count_offset = mirror::String::CountOffset().Int32Value(); |
| 1004 | // Starting offset within data array. |
| 1005 | int offset_offset = mirror::String::OffsetOffset().Int32Value(); |
| 1006 | // Start of char data with array_. |
| 1007 | int data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Int32Value(); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1008 | |
| 1009 | // Character is in EAX. |
| 1010 | // Object pointer is in EDX. |
| 1011 | |
| 1012 | // We need to preserve EDI, but have no spare registers, so push it on the stack. |
| 1013 | // We have to remember that all stack addresses after this are offset by sizeof(EDI). |
| 1014 | NewLIR1(kX86Push32R, rDI); |
| 1015 | |
| 1016 | // Compute the number of words to search in to rCX. |
Mark Mendell | e19c91f | 2014-02-25 08:19:08 -0800 | [diff] [blame] | 1017 | LoadWordDisp(rDX, count_offset, rCX); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1018 | LIR *length_compare = nullptr; |
| 1019 | int start_value = 0; |
| 1020 | if (zero_based) { |
| 1021 | // We have to handle an empty string. Use special instruction JECXZ. |
| 1022 | length_compare = NewLIR0(kX86Jecxz8); |
| 1023 | } else { |
| 1024 | // We have to offset by the start index. |
| 1025 | if (rl_start.is_const) { |
| 1026 | start_value = mir_graph_->ConstantValue(rl_start.orig_sreg); |
| 1027 | start_value = std::max(start_value, 0); |
| 1028 | |
| 1029 | // Is the start > count? |
| 1030 | length_compare = OpCmpImmBranch(kCondLe, rCX, start_value, nullptr); |
| 1031 | |
| 1032 | if (start_value != 0) { |
| 1033 | OpRegImm(kOpSub, rCX, start_value); |
| 1034 | } |
| 1035 | } else { |
| 1036 | // Runtime start index. |
| 1037 | rl_start = UpdateLoc(rl_start); |
| 1038 | if (rl_start.location == kLocPhysReg) { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 1039 | length_compare = OpCmpBranch(kCondLe, rCX, rl_start.low_reg, nullptr); |
| 1040 | OpRegReg(kOpSub, rCX, rl_start.low_reg); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1041 | } else { |
| 1042 | // Compare to memory to avoid a register load. Handle pushed EDI. |
| 1043 | int displacement = SRegOffset(rl_start.s_reg_low) + sizeof(uint32_t); |
| 1044 | OpRegMem(kOpCmp, rDX, rX86_SP, displacement); |
| 1045 | length_compare = NewLIR2(kX86Jcc8, 0, kX86CondLe); |
| 1046 | OpRegMem(kOpSub, rCX, rX86_SP, displacement); |
| 1047 | } |
| 1048 | } |
| 1049 | } |
| 1050 | DCHECK(length_compare != nullptr); |
| 1051 | |
| 1052 | // ECX now contains the count in words to be searched. |
| 1053 | |
| 1054 | // Load the address of the string into EBX. |
Mark Mendell | e19c91f | 2014-02-25 08:19:08 -0800 | [diff] [blame] | 1055 | // The string starts at VALUE(String) + 2 * OFFSET(String) + DATA_OFFSET. |
| 1056 | LoadWordDisp(rDX, value_offset, rDI); |
| 1057 | LoadWordDisp(rDX, offset_offset, rBX); |
| 1058 | OpLea(rBX, rDI, rBX, 1, data_offset); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1059 | |
| 1060 | // Now compute into EDI where the search will start. |
| 1061 | if (zero_based || rl_start.is_const) { |
| 1062 | if (start_value == 0) { |
| 1063 | OpRegCopy(rDI, rBX); |
| 1064 | } else { |
| 1065 | NewLIR3(kX86Lea32RM, rDI, rBX, 2 * start_value); |
| 1066 | } |
| 1067 | } else { |
| 1068 | if (rl_start.location == kLocPhysReg) { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 1069 | if (rl_start.low_reg == rDI) { |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1070 | // We have a slight problem here. We are already using RDI! |
| 1071 | // Grab the value from the stack. |
| 1072 | LoadWordDisp(rX86_SP, 0, rDX); |
| 1073 | OpLea(rDI, rBX, rDX, 1, 0); |
| 1074 | } else { |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 1075 | OpLea(rDI, rBX, rl_start.low_reg, 1, 0); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1076 | } |
| 1077 | } else { |
| 1078 | OpRegCopy(rDI, rBX); |
| 1079 | // Load the start index from stack, remembering that we pushed EDI. |
| 1080 | int displacement = SRegOffset(rl_start.s_reg_low) + sizeof(uint32_t); |
| 1081 | LoadWordDisp(rX86_SP, displacement, rDX); |
| 1082 | OpLea(rDI, rBX, rDX, 1, 0); |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | // EDI now contains the start of the string to be searched. |
| 1087 | // We are all prepared to do the search for the character. |
| 1088 | NewLIR0(kX86RepneScasw); |
| 1089 | |
| 1090 | // Did we find a match? |
| 1091 | LIR* failed_branch = OpCondBranch(kCondNe, nullptr); |
| 1092 | |
| 1093 | // yes, we matched. Compute the index of the result. |
| 1094 | // index = ((curr_ptr - orig_ptr) / 2) - 1. |
| 1095 | OpRegReg(kOpSub, rDI, rBX); |
| 1096 | OpRegImm(kOpAsr, rDI, 1); |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 1097 | NewLIR3(kX86Lea32RM, rl_return.low_reg, rDI, -1); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1098 | LIR *all_done = NewLIR1(kX86Jmp8, 0); |
| 1099 | |
| 1100 | // Failed to match; return -1. |
| 1101 | LIR *not_found = NewLIR0(kPseudoTargetLabel); |
| 1102 | length_compare->target = not_found; |
| 1103 | failed_branch->target = not_found; |
Bill Buzbee | 86ec520 | 2014-02-26 19:03:09 +0000 | [diff] [blame^] | 1104 | LoadConstantNoClobber(rl_return.low_reg, -1); |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1105 | |
| 1106 | // And join up at the end. |
| 1107 | all_done->target = NewLIR0(kPseudoTargetLabel); |
| 1108 | // Restore EDI from the stack. |
| 1109 | NewLIR1(kX86Pop32R, rDI); |
| 1110 | |
| 1111 | // Out of line code returns here. |
| 1112 | if (launch_pad != nullptr) { |
| 1113 | LIR *return_point = NewLIR0(kPseudoTargetLabel); |
| 1114 | launch_pad->operands[2] = WrapPointer(return_point); |
| 1115 | } |
| 1116 | |
| 1117 | StoreValue(rl_dest, rl_return); |
| 1118 | return true; |
| 1119 | } |
| 1120 | |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 1121 | } // namespace art |