buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | |
Elliott Hughes | 11d1b0c | 2012-01-23 16:57:47 -0800 | [diff] [blame] | 17 | namespace art { |
| 18 | |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 19 | /* |
| 20 | * This file contains codegen for the Thumb ISA and is intended to be |
| 21 | * includes by: |
| 22 | * |
| 23 | * Codegen-$(TARGET_ARCH_VARIANT).c |
| 24 | * |
| 25 | */ |
| 26 | |
buzbee | 6825326 | 2011-10-07 14:02:25 -0700 | [diff] [blame] | 27 | static int coreRegs[] = {r0, r1, r2, r3, rSUSPEND, r5, r6, r7, r8, rSELF, r10, |
buzbee | c1f4504 | 2011-09-21 16:03:19 -0700 | [diff] [blame] | 28 | r11, r12, rSP, rLR, rPC}; |
| 29 | static int reservedRegs[] = {rSUSPEND, rSELF, rSP, rLR, rPC}; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 30 | static int fpRegs[] = {fr0, fr1, fr2, fr3, fr4, fr5, fr6, fr7, |
| 31 | fr8, fr9, fr10, fr11, fr12, fr13, fr14, fr15, |
| 32 | fr16, fr17, fr18, fr19, fr20, fr21, fr22, fr23, |
| 33 | fr24, fr25, fr26, fr27, fr28, fr29, fr30, fr31}; |
| 34 | static int coreTemps[] = {r0, r1, r2, r3, r12}; |
| 35 | static int fpTemps[] = {fr0, fr1, fr2, fr3, fr4, fr5, fr6, fr7, |
| 36 | fr8, fr9, fr10, fr11, fr12, fr13, fr14, fr15}; |
| 37 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 38 | int encodeImmSingle(int value) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 39 | { |
| 40 | int res; |
| 41 | int bitA = (value & 0x80000000) >> 31; |
| 42 | int notBitB = (value & 0x40000000) >> 30; |
| 43 | int bitB = (value & 0x20000000) >> 29; |
| 44 | int bSmear = (value & 0x3e000000) >> 25; |
| 45 | int slice = (value & 0x01f80000) >> 19; |
| 46 | int zeroes = (value & 0x0007ffff); |
| 47 | if (zeroes != 0) |
| 48 | return -1; |
| 49 | if (bitB) { |
| 50 | if ((notBitB != 0) || (bSmear != 0x1f)) |
| 51 | return -1; |
| 52 | } else { |
| 53 | if ((notBitB != 1) || (bSmear != 0x0)) |
| 54 | return -1; |
| 55 | } |
| 56 | res = (bitA << 7) | (bitB << 6) | slice; |
| 57 | return res; |
| 58 | } |
| 59 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 60 | LIR* loadFPConstantValue(CompilationUnit* cUnit, int rDest, int value) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 61 | { |
| 62 | int encodedImm = encodeImmSingle(value); |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 63 | DCHECK(SINGLEREG(rDest)); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 64 | if (encodedImm >= 0) { |
| 65 | return newLIR2(cUnit, kThumb2Vmovs_IMM8, rDest, encodedImm); |
| 66 | } |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 67 | LIR* dataTarget = scanLiteralPool(cUnit->literalList, value, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 68 | if (dataTarget == NULL) { |
| 69 | dataTarget = addWordData(cUnit, &cUnit->literalList, value); |
| 70 | } |
buzbee | a2ebdd7 | 2012-03-04 14:57:06 -0800 | [diff] [blame^] | 71 | LIR* loadPcRel = rawLIR(cUnit, cUnit->currentDalvikOffset, kThumb2Vldrs, |
| 72 | rDest, r15pc, 0, 0, dataTarget); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 73 | setMemRefType(loadPcRel, true, kLiteral); |
buzbee | bbaf894 | 2011-10-02 13:08:29 -0700 | [diff] [blame] | 74 | loadPcRel->aliasInfo = (intptr_t)dataTarget; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 75 | oatAppendLIR(cUnit, (LIR* ) loadPcRel); |
| 76 | return loadPcRel; |
| 77 | } |
| 78 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 79 | int leadingZeros(u4 val) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 80 | { |
| 81 | u4 alt; |
| 82 | int n; |
| 83 | int count; |
| 84 | |
| 85 | count = 16; |
| 86 | n = 32; |
| 87 | do { |
| 88 | alt = val >> count; |
| 89 | if (alt != 0) { |
| 90 | n = n - count; |
| 91 | val = alt; |
| 92 | } |
| 93 | count >>= 1; |
| 94 | } while (count); |
| 95 | return n - val; |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Determine whether value can be encoded as a Thumb2 modified |
| 100 | * immediate. If not, return -1. If so, return i:imm3:a:bcdefgh form. |
| 101 | */ |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 102 | int modifiedImmediate(u4 value) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 103 | { |
| 104 | int zLeading; |
| 105 | int zTrailing; |
| 106 | u4 b0 = value & 0xff; |
| 107 | |
| 108 | /* Note: case of value==0 must use 0:000:0:0000000 encoding */ |
| 109 | if (value <= 0xFF) |
| 110 | return b0; // 0:000:a:bcdefgh |
| 111 | if (value == ((b0 << 16) | b0)) |
| 112 | return (0x1 << 8) | b0; /* 0:001:a:bcdefgh */ |
| 113 | if (value == ((b0 << 24) | (b0 << 16) | (b0 << 8) | b0)) |
| 114 | return (0x3 << 8) | b0; /* 0:011:a:bcdefgh */ |
| 115 | b0 = (value >> 8) & 0xff; |
| 116 | if (value == ((b0 << 24) | (b0 << 8))) |
| 117 | return (0x2 << 8) | b0; /* 0:010:a:bcdefgh */ |
| 118 | /* Can we do it with rotation? */ |
| 119 | zLeading = leadingZeros(value); |
| 120 | zTrailing = 32 - leadingZeros(~value & (value - 1)); |
| 121 | /* A run of eight or fewer active bits? */ |
| 122 | if ((zLeading + zTrailing) < 24) |
| 123 | return -1; /* No - bail */ |
| 124 | /* left-justify the constant, discarding msb (known to be 1) */ |
| 125 | value <<= zLeading + 1; |
| 126 | /* Create bcdefgh */ |
| 127 | value >>= 25; |
| 128 | /* Put it all together */ |
| 129 | return value | ((0x8 + zLeading) << 7); /* [01000..11111]:bcdefgh */ |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * Load a immediate using a shortcut if possible; otherwise |
| 134 | * grab from the per-translation literal pool. |
| 135 | * |
| 136 | * No additional register clobbering operation performed. Use this version when |
| 137 | * 1) rDest is freshly returned from oatAllocTemp or |
| 138 | * 2) The codegen is under fixed register usage |
| 139 | */ |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 140 | LIR* loadConstantNoClobber(CompilationUnit* cUnit, int rDest, int value) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 141 | { |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 142 | LIR* res; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 143 | int modImm; |
| 144 | |
| 145 | if (FPREG(rDest)) { |
| 146 | return loadFPConstantValue(cUnit, rDest, value); |
| 147 | } |
| 148 | |
| 149 | /* See if the value can be constructed cheaply */ |
| 150 | if (LOWREG(rDest) && (value >= 0) && (value <= 255)) { |
| 151 | return newLIR2(cUnit, kThumbMovImm, rDest, value); |
| 152 | } |
| 153 | /* Check Modified immediate special cases */ |
| 154 | modImm = modifiedImmediate(value); |
| 155 | if (modImm >= 0) { |
| 156 | res = newLIR2(cUnit, kThumb2MovImmShift, rDest, modImm); |
| 157 | return res; |
| 158 | } |
| 159 | modImm = modifiedImmediate(~value); |
| 160 | if (modImm >= 0) { |
buzbee | 58f9274 | 2011-10-01 11:22:17 -0700 | [diff] [blame] | 161 | res = newLIR2(cUnit, kThumb2MvnImm12, rDest, modImm); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 162 | return res; |
| 163 | } |
| 164 | /* 16-bit immediate? */ |
| 165 | if ((value & 0xffff) == value) { |
| 166 | res = newLIR2(cUnit, kThumb2MovImm16, rDest, value); |
| 167 | return res; |
| 168 | } |
| 169 | /* No shortcut - go ahead and use literal pool */ |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 170 | LIR* dataTarget = scanLiteralPool(cUnit->literalList, value, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 171 | if (dataTarget == NULL) { |
| 172 | dataTarget = addWordData(cUnit, &cUnit->literalList, value); |
| 173 | } |
buzbee | a2ebdd7 | 2012-03-04 14:57:06 -0800 | [diff] [blame^] | 174 | LIR* loadPcRel = rawLIR(cUnit, cUnit->currentDalvikOffset, |
| 175 | kThumb2LdrPcRel12, rDest, 0, 0, 0, dataTarget); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 176 | setMemRefType(loadPcRel, true, kLiteral); |
buzbee | bbaf894 | 2011-10-02 13:08:29 -0700 | [diff] [blame] | 177 | loadPcRel->aliasInfo = (intptr_t)dataTarget; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 178 | res = loadPcRel; |
| 179 | oatAppendLIR(cUnit, (LIR* ) loadPcRel); |
| 180 | |
| 181 | /* |
| 182 | * To save space in the constant pool, we use the ADD_RRI8 instruction to |
| 183 | * add up to 255 to an existing constant value. |
| 184 | */ |
| 185 | if (dataTarget->operands[0] != value) { |
| 186 | opRegImm(cUnit, kOpAdd, rDest, value - dataTarget->operands[0]); |
| 187 | } |
| 188 | return res; |
| 189 | } |
| 190 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 191 | LIR* opNone(CompilationUnit* cUnit, OpKind op) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 192 | { |
| 193 | ArmOpcode opcode = kThumbBkpt; |
| 194 | switch (op) { |
| 195 | case kOpUncondBr: |
| 196 | opcode = kThumbBUncond; |
| 197 | break; |
| 198 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 199 | LOG(FATAL) << "Bad opcode " << (int)op; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 200 | } |
| 201 | return newLIR0(cUnit, opcode); |
| 202 | } |
| 203 | |
buzbee | 82488f5 | 2012-03-02 08:20:26 -0800 | [diff] [blame] | 204 | LIR* opCondBranch(CompilationUnit* cUnit, ConditionCode cc, LIR* target) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 205 | { |
buzbee | 82488f5 | 2012-03-02 08:20:26 -0800 | [diff] [blame] | 206 | LIR* branch = newLIR2(cUnit, kThumb2BCond, 0 /* offset to be patched */, |
| 207 | oatArmConditionEncoding(cc)); |
| 208 | branch->target = target; |
| 209 | return branch; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 210 | } |
| 211 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 212 | LIR* opReg(CompilationUnit* cUnit, OpKind op, int rDestSrc) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 213 | { |
| 214 | ArmOpcode opcode = kThumbBkpt; |
| 215 | switch (op) { |
| 216 | case kOpBlx: |
| 217 | opcode = kThumbBlxR; |
| 218 | break; |
| 219 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 220 | LOG(FATAL) << "Bad opcode " << (int)op; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 221 | } |
| 222 | return newLIR1(cUnit, opcode, rDestSrc); |
| 223 | } |
| 224 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 225 | LIR* opRegRegShift(CompilationUnit* cUnit, OpKind op, int rDestSrc1, |
| 226 | int rSrc2, int shift) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 227 | { |
| 228 | bool thumbForm = ((shift == 0) && LOWREG(rDestSrc1) && LOWREG(rSrc2)); |
| 229 | ArmOpcode opcode = kThumbBkpt; |
| 230 | switch (op) { |
| 231 | case kOpAdc: |
| 232 | opcode = (thumbForm) ? kThumbAdcRR : kThumb2AdcRRR; |
| 233 | break; |
| 234 | case kOpAnd: |
| 235 | opcode = (thumbForm) ? kThumbAndRR : kThumb2AndRRR; |
| 236 | break; |
| 237 | case kOpBic: |
| 238 | opcode = (thumbForm) ? kThumbBicRR : kThumb2BicRRR; |
| 239 | break; |
| 240 | case kOpCmn: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 241 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 242 | opcode = (thumbForm) ? kThumbCmnRR : kThumb2CmnRR; |
| 243 | break; |
| 244 | case kOpCmp: |
| 245 | if (thumbForm) |
| 246 | opcode = kThumbCmpRR; |
| 247 | else if ((shift == 0) && !LOWREG(rDestSrc1) && !LOWREG(rSrc2)) |
| 248 | opcode = kThumbCmpHH; |
| 249 | else if ((shift == 0) && LOWREG(rDestSrc1)) |
| 250 | opcode = kThumbCmpLH; |
| 251 | else if (shift == 0) |
| 252 | opcode = kThumbCmpHL; |
| 253 | else |
| 254 | opcode = kThumb2CmpRR; |
| 255 | break; |
| 256 | case kOpXor: |
| 257 | opcode = (thumbForm) ? kThumbEorRR : kThumb2EorRRR; |
| 258 | break; |
| 259 | case kOpMov: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 260 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 261 | if (LOWREG(rDestSrc1) && LOWREG(rSrc2)) |
| 262 | opcode = kThumbMovRR; |
| 263 | else if (!LOWREG(rDestSrc1) && !LOWREG(rSrc2)) |
| 264 | opcode = kThumbMovRR_H2H; |
| 265 | else if (LOWREG(rDestSrc1)) |
| 266 | opcode = kThumbMovRR_H2L; |
| 267 | else |
| 268 | opcode = kThumbMovRR_L2H; |
| 269 | break; |
| 270 | case kOpMul: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 271 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 272 | opcode = (thumbForm) ? kThumbMul : kThumb2MulRRR; |
| 273 | break; |
| 274 | case kOpMvn: |
| 275 | opcode = (thumbForm) ? kThumbMvn : kThumb2MnvRR; |
| 276 | break; |
| 277 | case kOpNeg: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 278 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 279 | opcode = (thumbForm) ? kThumbNeg : kThumb2NegRR; |
| 280 | break; |
| 281 | case kOpOr: |
| 282 | opcode = (thumbForm) ? kThumbOrr : kThumb2OrrRRR; |
| 283 | break; |
| 284 | case kOpSbc: |
| 285 | opcode = (thumbForm) ? kThumbSbc : kThumb2SbcRRR; |
| 286 | break; |
| 287 | case kOpTst: |
| 288 | opcode = (thumbForm) ? kThumbTst : kThumb2TstRR; |
| 289 | break; |
| 290 | case kOpLsl: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 291 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 292 | opcode = (thumbForm) ? kThumbLslRR : kThumb2LslRRR; |
| 293 | break; |
| 294 | case kOpLsr: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 295 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 296 | opcode = (thumbForm) ? kThumbLsrRR : kThumb2LsrRRR; |
| 297 | break; |
| 298 | case kOpAsr: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 299 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 300 | opcode = (thumbForm) ? kThumbAsrRR : kThumb2AsrRRR; |
| 301 | break; |
| 302 | case kOpRor: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 303 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 304 | opcode = (thumbForm) ? kThumbRorRR : kThumb2RorRRR; |
| 305 | break; |
| 306 | case kOpAdd: |
| 307 | opcode = (thumbForm) ? kThumbAddRRR : kThumb2AddRRR; |
| 308 | break; |
| 309 | case kOpSub: |
| 310 | opcode = (thumbForm) ? kThumbSubRRR : kThumb2SubRRR; |
| 311 | break; |
| 312 | case kOp2Byte: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 313 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 314 | return newLIR4(cUnit, kThumb2Sbfx, rDestSrc1, rSrc2, 0, 8); |
| 315 | case kOp2Short: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 316 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 317 | return newLIR4(cUnit, kThumb2Sbfx, rDestSrc1, rSrc2, 0, 16); |
| 318 | case kOp2Char: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 319 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 320 | return newLIR4(cUnit, kThumb2Ubfx, rDestSrc1, rSrc2, 0, 16); |
| 321 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 322 | LOG(FATAL) << "Bad opcode: " << (int)op; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 323 | break; |
| 324 | } |
Elliott Hughes | f5a7a47 | 2011-10-07 14:31:02 -0700 | [diff] [blame] | 325 | DCHECK_GE(static_cast<int>(opcode), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 326 | if (EncodingMap[opcode].flags & IS_BINARY_OP) |
| 327 | return newLIR2(cUnit, opcode, rDestSrc1, rSrc2); |
| 328 | else if (EncodingMap[opcode].flags & IS_TERTIARY_OP) { |
| 329 | if (EncodingMap[opcode].fieldLoc[2].kind == kFmtShift) |
| 330 | return newLIR3(cUnit, opcode, rDestSrc1, rSrc2, shift); |
| 331 | else |
| 332 | return newLIR3(cUnit, opcode, rDestSrc1, rDestSrc1, rSrc2); |
| 333 | } else if (EncodingMap[opcode].flags & IS_QUAD_OP) |
| 334 | return newLIR4(cUnit, opcode, rDestSrc1, rDestSrc1, rSrc2, shift); |
| 335 | else { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 336 | LOG(FATAL) << "Unexpected encoding operand count"; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 337 | return NULL; |
| 338 | } |
| 339 | } |
| 340 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 341 | LIR* opRegReg(CompilationUnit* cUnit, OpKind op, int rDestSrc1, int rSrc2) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 342 | { |
| 343 | return opRegRegShift(cUnit, op, rDestSrc1, rSrc2, 0); |
| 344 | } |
| 345 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 346 | LIR* opRegRegRegShift(CompilationUnit* cUnit, OpKind op, int rDest, int rSrc1, |
| 347 | int rSrc2, int shift) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 348 | { |
| 349 | ArmOpcode opcode = kThumbBkpt; |
| 350 | bool thumbForm = (shift == 0) && LOWREG(rDest) && LOWREG(rSrc1) && |
| 351 | LOWREG(rSrc2); |
| 352 | switch (op) { |
| 353 | case kOpAdd: |
| 354 | opcode = (thumbForm) ? kThumbAddRRR : kThumb2AddRRR; |
| 355 | break; |
| 356 | case kOpSub: |
| 357 | opcode = (thumbForm) ? kThumbSubRRR : kThumb2SubRRR; |
| 358 | break; |
| 359 | case kOpAdc: |
| 360 | opcode = kThumb2AdcRRR; |
| 361 | break; |
| 362 | case kOpAnd: |
| 363 | opcode = kThumb2AndRRR; |
| 364 | break; |
| 365 | case kOpBic: |
| 366 | opcode = kThumb2BicRRR; |
| 367 | break; |
| 368 | case kOpXor: |
| 369 | opcode = kThumb2EorRRR; |
| 370 | break; |
| 371 | case kOpMul: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 372 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 373 | opcode = kThumb2MulRRR; |
| 374 | break; |
| 375 | case kOpOr: |
| 376 | opcode = kThumb2OrrRRR; |
| 377 | break; |
| 378 | case kOpSbc: |
| 379 | opcode = kThumb2SbcRRR; |
| 380 | break; |
| 381 | case kOpLsl: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 382 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 383 | opcode = kThumb2LslRRR; |
| 384 | break; |
| 385 | case kOpLsr: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 386 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 387 | opcode = kThumb2LsrRRR; |
| 388 | break; |
| 389 | case kOpAsr: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 390 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 391 | opcode = kThumb2AsrRRR; |
| 392 | break; |
| 393 | case kOpRor: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 394 | DCHECK_EQ(shift, 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 395 | opcode = kThumb2RorRRR; |
| 396 | break; |
| 397 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 398 | LOG(FATAL) << "Bad opcode: " << (int)op; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 399 | break; |
| 400 | } |
Elliott Hughes | f5a7a47 | 2011-10-07 14:31:02 -0700 | [diff] [blame] | 401 | DCHECK_GE(static_cast<int>(opcode), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 402 | if (EncodingMap[opcode].flags & IS_QUAD_OP) |
| 403 | return newLIR4(cUnit, opcode, rDest, rSrc1, rSrc2, shift); |
| 404 | else { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 405 | DCHECK(EncodingMap[opcode].flags & IS_TERTIARY_OP); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 406 | return newLIR3(cUnit, opcode, rDest, rSrc1, rSrc2); |
| 407 | } |
| 408 | } |
| 409 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 410 | LIR* opRegRegReg(CompilationUnit* cUnit, OpKind op, int rDest, int rSrc1, |
| 411 | int rSrc2) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 412 | { |
| 413 | return opRegRegRegShift(cUnit, op, rDest, rSrc1, rSrc2, 0); |
| 414 | } |
| 415 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 416 | LIR* opRegRegImm(CompilationUnit* cUnit, OpKind op, int rDest, int rSrc1, |
| 417 | int value) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 418 | { |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 419 | LIR* res; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 420 | bool neg = (value < 0); |
| 421 | int absValue = (neg) ? -value : value; |
| 422 | ArmOpcode opcode = kThumbBkpt; |
| 423 | ArmOpcode altOpcode = kThumbBkpt; |
| 424 | bool allLowRegs = (LOWREG(rDest) && LOWREG(rSrc1)); |
| 425 | int modImm = modifiedImmediate(value); |
| 426 | int modImmNeg = modifiedImmediate(-value); |
| 427 | |
| 428 | switch(op) { |
| 429 | case kOpLsl: |
| 430 | if (allLowRegs) |
| 431 | return newLIR3(cUnit, kThumbLslRRI5, rDest, rSrc1, value); |
| 432 | else |
| 433 | return newLIR3(cUnit, kThumb2LslRRI5, rDest, rSrc1, value); |
| 434 | case kOpLsr: |
| 435 | if (allLowRegs) |
| 436 | return newLIR3(cUnit, kThumbLsrRRI5, rDest, rSrc1, value); |
| 437 | else |
| 438 | return newLIR3(cUnit, kThumb2LsrRRI5, rDest, rSrc1, value); |
| 439 | case kOpAsr: |
| 440 | if (allLowRegs) |
| 441 | return newLIR3(cUnit, kThumbAsrRRI5, rDest, rSrc1, value); |
| 442 | else |
| 443 | return newLIR3(cUnit, kThumb2AsrRRI5, rDest, rSrc1, value); |
| 444 | case kOpRor: |
| 445 | return newLIR3(cUnit, kThumb2RorRRI5, rDest, rSrc1, value); |
| 446 | case kOpAdd: |
| 447 | if (LOWREG(rDest) && (rSrc1 == r13sp) && |
| 448 | (value <= 1020) && ((value & 0x3)==0)) { |
| 449 | return newLIR3(cUnit, kThumbAddSpRel, rDest, rSrc1, |
| 450 | value >> 2); |
| 451 | } else if (LOWREG(rDest) && (rSrc1 == r15pc) && |
| 452 | (value <= 1020) && ((value & 0x3)==0)) { |
| 453 | return newLIR3(cUnit, kThumbAddPcRel, rDest, rSrc1, |
| 454 | value >> 2); |
| 455 | } |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 456 | // Note: intentional fallthrough |
| 457 | case kOpSub: |
| 458 | if (allLowRegs && ((absValue & 0x7) == absValue)) { |
| 459 | if (op == kOpAdd) |
| 460 | opcode = (neg) ? kThumbSubRRI3 : kThumbAddRRI3; |
| 461 | else |
| 462 | opcode = (neg) ? kThumbAddRRI3 : kThumbSubRRI3; |
| 463 | return newLIR3(cUnit, opcode, rDest, rSrc1, absValue); |
| 464 | } else if ((absValue & 0xff) == absValue) { |
| 465 | if (op == kOpAdd) |
| 466 | opcode = (neg) ? kThumb2SubRRI12 : kThumb2AddRRI12; |
| 467 | else |
| 468 | opcode = (neg) ? kThumb2AddRRI12 : kThumb2SubRRI12; |
| 469 | return newLIR3(cUnit, opcode, rDest, rSrc1, absValue); |
| 470 | } |
| 471 | if (modImmNeg >= 0) { |
| 472 | op = (op == kOpAdd) ? kOpSub : kOpAdd; |
| 473 | modImm = modImmNeg; |
| 474 | } |
| 475 | if (op == kOpSub) { |
| 476 | opcode = kThumb2SubRRI8; |
| 477 | altOpcode = kThumb2SubRRR; |
buzbee | 3b5d379 | 2011-09-20 11:01:40 -0700 | [diff] [blame] | 478 | } else { |
| 479 | opcode = kThumb2AddRRI8; |
| 480 | altOpcode = kThumb2AddRRR; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 481 | } |
| 482 | break; |
| 483 | case kOpAdc: |
| 484 | opcode = kThumb2AdcRRI8; |
| 485 | altOpcode = kThumb2AdcRRR; |
| 486 | break; |
| 487 | case kOpSbc: |
| 488 | opcode = kThumb2SbcRRI8; |
| 489 | altOpcode = kThumb2SbcRRR; |
| 490 | break; |
| 491 | case kOpOr: |
| 492 | opcode = kThumb2OrrRRI8; |
| 493 | altOpcode = kThumb2OrrRRR; |
| 494 | break; |
| 495 | case kOpAnd: |
| 496 | opcode = kThumb2AndRRI8; |
| 497 | altOpcode = kThumb2AndRRR; |
| 498 | break; |
| 499 | case kOpXor: |
| 500 | opcode = kThumb2EorRRI8; |
| 501 | altOpcode = kThumb2EorRRR; |
| 502 | break; |
| 503 | case kOpMul: |
| 504 | //TUNING: power of 2, shift & add |
| 505 | modImm = -1; |
| 506 | altOpcode = kThumb2MulRRR; |
| 507 | break; |
| 508 | case kOpCmp: { |
| 509 | int modImm = modifiedImmediate(value); |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 510 | LIR* res; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 511 | if (modImm >= 0) { |
| 512 | res = newLIR2(cUnit, kThumb2CmpRI8, rSrc1, modImm); |
| 513 | } else { |
| 514 | int rTmp = oatAllocTemp(cUnit); |
| 515 | res = loadConstant(cUnit, rTmp, value); |
| 516 | opRegReg(cUnit, kOpCmp, rSrc1, rTmp); |
| 517 | oatFreeTemp(cUnit, rTmp); |
| 518 | } |
| 519 | return res; |
| 520 | } |
| 521 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 522 | LOG(FATAL) << "Bad opcode: " << (int)op; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 523 | } |
| 524 | |
| 525 | if (modImm >= 0) { |
| 526 | return newLIR3(cUnit, opcode, rDest, rSrc1, modImm); |
| 527 | } else { |
| 528 | int rScratch = oatAllocTemp(cUnit); |
| 529 | loadConstant(cUnit, rScratch, value); |
| 530 | if (EncodingMap[altOpcode].flags & IS_QUAD_OP) |
| 531 | res = newLIR4(cUnit, altOpcode, rDest, rSrc1, rScratch, 0); |
| 532 | else |
| 533 | res = newLIR3(cUnit, altOpcode, rDest, rSrc1, rScratch); |
| 534 | oatFreeTemp(cUnit, rScratch); |
| 535 | return res; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /* Handle Thumb-only variants here - otherwise punt to opRegRegImm */ |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 540 | LIR* opRegImm(CompilationUnit* cUnit, OpKind op, int rDestSrc1, int value) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 541 | { |
| 542 | bool neg = (value < 0); |
| 543 | int absValue = (neg) ? -value : value; |
| 544 | bool shortForm = (((absValue & 0xff) == absValue) && LOWREG(rDestSrc1)); |
| 545 | ArmOpcode opcode = kThumbBkpt; |
| 546 | switch (op) { |
| 547 | case kOpAdd: |
| 548 | if ( !neg && (rDestSrc1 == r13sp) && (value <= 508)) { /* sp */ |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 549 | DCHECK_EQ((value & 0x3), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 550 | return newLIR1(cUnit, kThumbAddSpI7, value >> 2); |
| 551 | } else if (shortForm) { |
| 552 | opcode = (neg) ? kThumbSubRI8 : kThumbAddRI8; |
| 553 | } |
| 554 | break; |
| 555 | case kOpSub: |
| 556 | if (!neg && (rDestSrc1 == r13sp) && (value <= 508)) { /* sp */ |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 557 | DCHECK_EQ((value & 0x3), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 558 | return newLIR1(cUnit, kThumbSubSpI7, value >> 2); |
| 559 | } else if (shortForm) { |
| 560 | opcode = (neg) ? kThumbAddRI8 : kThumbSubRI8; |
| 561 | } |
| 562 | break; |
| 563 | case kOpCmp: |
| 564 | if (LOWREG(rDestSrc1) && shortForm) |
| 565 | opcode = (shortForm) ? kThumbCmpRI8 : kThumbCmpRR; |
| 566 | else if (LOWREG(rDestSrc1)) |
| 567 | opcode = kThumbCmpRR; |
| 568 | else { |
| 569 | shortForm = false; |
| 570 | opcode = kThumbCmpHL; |
| 571 | } |
| 572 | break; |
| 573 | default: |
| 574 | /* Punt to opRegRegImm - if bad case catch it there */ |
| 575 | shortForm = false; |
| 576 | break; |
| 577 | } |
| 578 | if (shortForm) |
| 579 | return newLIR2(cUnit, opcode, rDestSrc1, absValue); |
| 580 | else { |
| 581 | return opRegRegImm(cUnit, op, rDestSrc1, rDestSrc1, value); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | /* |
| 586 | * Determine whether value can be encoded as a Thumb2 floating point |
| 587 | * immediate. If not, return -1. If so return encoded 8-bit value. |
| 588 | */ |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 589 | int encodeImmDoubleHigh(int value) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 590 | { |
| 591 | int res; |
| 592 | int bitA = (value & 0x80000000) >> 31; |
| 593 | int notBitB = (value & 0x40000000) >> 30; |
| 594 | int bitB = (value & 0x20000000) >> 29; |
| 595 | int bSmear = (value & 0x3fc00000) >> 22; |
| 596 | int slice = (value & 0x003f0000) >> 16; |
| 597 | int zeroes = (value & 0x0000ffff); |
| 598 | if (zeroes != 0) |
| 599 | return -1; |
| 600 | if (bitB) { |
buzbee | 03fa263 | 2011-09-20 17:10:57 -0700 | [diff] [blame] | 601 | if ((notBitB != 0) || (bSmear != 0xff)) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 602 | return -1; |
| 603 | } else { |
| 604 | if ((notBitB != 1) || (bSmear != 0x0)) |
| 605 | return -1; |
| 606 | } |
| 607 | res = (bitA << 7) | (bitB << 6) | slice; |
| 608 | return res; |
| 609 | } |
| 610 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 611 | int encodeImmDouble(int valLo, int valHi) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 612 | { |
| 613 | int res = -1; |
| 614 | if (valLo == 0) |
| 615 | res = encodeImmDoubleHigh(valHi); |
| 616 | return res; |
| 617 | } |
| 618 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 619 | LIR* loadConstantValueWide(CompilationUnit* cUnit, int rDestLo, int rDestHi, |
| 620 | int valLo, int valHi) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 621 | { |
| 622 | int encodedImm = encodeImmDouble(valLo, valHi); |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 623 | LIR* res; |
buzbee | 03fa263 | 2011-09-20 17:10:57 -0700 | [diff] [blame] | 624 | if (FPREG(rDestLo)) { |
| 625 | if (encodedImm >= 0) { |
| 626 | res = newLIR2(cUnit, kThumb2Vmovd_IMM8, S2D(rDestLo, rDestHi), |
| 627 | encodedImm); |
| 628 | } else { |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 629 | LIR* dataTarget = scanLiteralPoolWide(cUnit->literalList, valLo, |
buzbee | 03fa263 | 2011-09-20 17:10:57 -0700 | [diff] [blame] | 630 | valHi); |
| 631 | if (dataTarget == NULL) { |
| 632 | dataTarget = addWideData(cUnit, &cUnit->literalList, valLo, |
| 633 | valHi); |
| 634 | } |
buzbee | a2ebdd7 | 2012-03-04 14:57:06 -0800 | [diff] [blame^] | 635 | LIR* loadPcRel = rawLIR(cUnit, cUnit->currentDalvikOffset, |
| 636 | kThumb2Vldrd, S2D(rDestLo, rDestHi), |
| 637 | r15pc, 0, 0, dataTarget); |
buzbee | 03fa263 | 2011-09-20 17:10:57 -0700 | [diff] [blame] | 638 | setMemRefType(loadPcRel, true, kLiteral); |
buzbee | bbaf894 | 2011-10-02 13:08:29 -0700 | [diff] [blame] | 639 | loadPcRel->aliasInfo = (intptr_t)dataTarget; |
buzbee | 03fa263 | 2011-09-20 17:10:57 -0700 | [diff] [blame] | 640 | oatAppendLIR(cUnit, (LIR* ) loadPcRel); |
| 641 | res = loadPcRel; |
| 642 | } |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 643 | } else { |
| 644 | res = loadConstantNoClobber(cUnit, rDestLo, valLo); |
| 645 | loadConstantNoClobber(cUnit, rDestHi, valHi); |
| 646 | } |
| 647 | return res; |
| 648 | } |
| 649 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 650 | int encodeShift(int code, int amount) { |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 651 | return ((amount & 0x1f) << 2) | code; |
| 652 | } |
| 653 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 654 | LIR* loadBaseIndexed(CompilationUnit* cUnit, int rBase, int rIndex, int rDest, |
| 655 | int scale, OpSize size) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 656 | { |
| 657 | bool allLowRegs = LOWREG(rBase) && LOWREG(rIndex) && LOWREG(rDest); |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 658 | LIR* load; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 659 | ArmOpcode opcode = kThumbBkpt; |
| 660 | bool thumbForm = (allLowRegs && (scale == 0)); |
| 661 | int regPtr; |
| 662 | |
| 663 | if (FPREG(rDest)) { |
Ian Rogers | 513c64a | 2012-02-26 15:16:23 -0800 | [diff] [blame] | 664 | if (SINGLEREG(rDest)) { |
| 665 | DCHECK((size == kWord) || (size == kSingle)); |
| 666 | opcode = kThumb2Vldrs; |
| 667 | size = kSingle; |
| 668 | } else { |
| 669 | DCHECK(DOUBLEREG(rDest)); |
| 670 | DCHECK((size == kLong) || (size == kDouble)); |
| 671 | DCHECK((rDest & 0x1) == 0); |
| 672 | opcode = kThumb2Vldrd; |
| 673 | size = kDouble; |
| 674 | } |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 675 | } else { |
| 676 | if (size == kSingle) |
| 677 | size = kWord; |
| 678 | } |
| 679 | |
| 680 | switch (size) { |
Ian Rogers | 513c64a | 2012-02-26 15:16:23 -0800 | [diff] [blame] | 681 | case kDouble: // fall-through |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 682 | case kSingle: |
| 683 | regPtr = oatAllocTemp(cUnit); |
| 684 | if (scale) { |
| 685 | newLIR4(cUnit, kThumb2AddRRR, regPtr, rBase, rIndex, |
| 686 | encodeShift(kArmLsl, scale)); |
| 687 | } else { |
| 688 | opRegRegReg(cUnit, kOpAdd, regPtr, rBase, rIndex); |
| 689 | } |
| 690 | load = newLIR3(cUnit, opcode, rDest, regPtr, 0); |
| 691 | return load; |
| 692 | case kWord: |
| 693 | opcode = (thumbForm) ? kThumbLdrRRR : kThumb2LdrRRR; |
| 694 | break; |
| 695 | case kUnsignedHalf: |
| 696 | opcode = (thumbForm) ? kThumbLdrhRRR : kThumb2LdrhRRR; |
| 697 | break; |
| 698 | case kSignedHalf: |
| 699 | opcode = (thumbForm) ? kThumbLdrshRRR : kThumb2LdrshRRR; |
| 700 | break; |
| 701 | case kUnsignedByte: |
| 702 | opcode = (thumbForm) ? kThumbLdrbRRR : kThumb2LdrbRRR; |
| 703 | break; |
| 704 | case kSignedByte: |
| 705 | opcode = (thumbForm) ? kThumbLdrsbRRR : kThumb2LdrsbRRR; |
| 706 | break; |
| 707 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 708 | LOG(FATAL) << "Bad size: " << (int)size; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 709 | } |
| 710 | if (thumbForm) |
| 711 | load = newLIR3(cUnit, opcode, rDest, rBase, rIndex); |
| 712 | else |
| 713 | load = newLIR4(cUnit, opcode, rDest, rBase, rIndex, scale); |
| 714 | |
| 715 | return load; |
| 716 | } |
| 717 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 718 | LIR* storeBaseIndexed(CompilationUnit* cUnit, int rBase, int rIndex, int rSrc, |
| 719 | int scale, OpSize size) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 720 | { |
| 721 | bool allLowRegs = LOWREG(rBase) && LOWREG(rIndex) && LOWREG(rSrc); |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 722 | LIR* store; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 723 | ArmOpcode opcode = kThumbBkpt; |
| 724 | bool thumbForm = (allLowRegs && (scale == 0)); |
| 725 | int regPtr; |
| 726 | |
| 727 | if (FPREG(rSrc)) { |
Ian Rogers | 513c64a | 2012-02-26 15:16:23 -0800 | [diff] [blame] | 728 | if (SINGLEREG(rSrc)) { |
| 729 | DCHECK((size == kWord) || (size == kSingle)); |
| 730 | opcode = kThumb2Vstrs; |
| 731 | size = kSingle; |
| 732 | } else { |
| 733 | DCHECK(DOUBLEREG(rSrc)); |
| 734 | DCHECK((size == kLong) || (size == kDouble)); |
| 735 | DCHECK((rSrc & 0x1) == 0); |
| 736 | opcode = kThumb2Vstrd; |
| 737 | size = kDouble; |
| 738 | } |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 739 | } else { |
| 740 | if (size == kSingle) |
| 741 | size = kWord; |
| 742 | } |
| 743 | |
| 744 | switch (size) { |
Ian Rogers | 513c64a | 2012-02-26 15:16:23 -0800 | [diff] [blame] | 745 | case kDouble: // fall-through |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 746 | case kSingle: |
| 747 | regPtr = oatAllocTemp(cUnit); |
| 748 | if (scale) { |
| 749 | newLIR4(cUnit, kThumb2AddRRR, regPtr, rBase, rIndex, |
| 750 | encodeShift(kArmLsl, scale)); |
| 751 | } else { |
| 752 | opRegRegReg(cUnit, kOpAdd, regPtr, rBase, rIndex); |
| 753 | } |
| 754 | store = newLIR3(cUnit, opcode, rSrc, regPtr, 0); |
| 755 | return store; |
| 756 | case kWord: |
| 757 | opcode = (thumbForm) ? kThumbStrRRR : kThumb2StrRRR; |
| 758 | break; |
| 759 | case kUnsignedHalf: |
| 760 | case kSignedHalf: |
| 761 | opcode = (thumbForm) ? kThumbStrhRRR : kThumb2StrhRRR; |
| 762 | break; |
| 763 | case kUnsignedByte: |
| 764 | case kSignedByte: |
| 765 | opcode = (thumbForm) ? kThumbStrbRRR : kThumb2StrbRRR; |
| 766 | break; |
| 767 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 768 | LOG(FATAL) << "Bad size: " << (int)size; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 769 | } |
| 770 | if (thumbForm) |
| 771 | store = newLIR3(cUnit, opcode, rSrc, rBase, rIndex); |
| 772 | else |
| 773 | store = newLIR4(cUnit, opcode, rSrc, rBase, rIndex, scale); |
| 774 | |
| 775 | return store; |
| 776 | } |
| 777 | |
| 778 | /* |
| 779 | * Load value from base + displacement. Optionally perform null check |
| 780 | * on base (which must have an associated sReg and MIR). If not |
| 781 | * performing null check, incoming MIR can be null. |
| 782 | */ |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 783 | LIR* loadBaseDispBody(CompilationUnit* cUnit, MIR* mir, int rBase, |
| 784 | int displacement, int rDest, int rDestHi, OpSize size, |
| 785 | int sReg) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 786 | { |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 787 | LIR* res; |
| 788 | LIR* load; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 789 | ArmOpcode opcode = kThumbBkpt; |
| 790 | bool shortForm = false; |
| 791 | bool thumb2Form = (displacement < 4092 && displacement >= 0); |
| 792 | bool allLowRegs = (LOWREG(rBase) && LOWREG(rDest)); |
| 793 | int encodedDisp = displacement; |
| 794 | |
| 795 | switch (size) { |
| 796 | case kDouble: |
| 797 | case kLong: |
| 798 | if (FPREG(rDest)) { |
| 799 | if (SINGLEREG(rDest)) { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 800 | DCHECK(FPREG(rDestHi)); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 801 | rDest = S2D(rDest, rDestHi); |
| 802 | } |
| 803 | opcode = kThumb2Vldrd; |
| 804 | if (displacement <= 1020) { |
| 805 | shortForm = true; |
| 806 | encodedDisp >>= 2; |
| 807 | } |
| 808 | break; |
| 809 | } else { |
| 810 | res = loadBaseDispBody(cUnit, mir, rBase, displacement, rDest, |
| 811 | -1, kWord, sReg); |
| 812 | loadBaseDispBody(cUnit, NULL, rBase, displacement + 4, rDestHi, |
| 813 | -1, kWord, INVALID_SREG); |
| 814 | return res; |
| 815 | } |
| 816 | case kSingle: |
| 817 | case kWord: |
| 818 | if (FPREG(rDest)) { |
| 819 | opcode = kThumb2Vldrs; |
| 820 | if (displacement <= 1020) { |
| 821 | shortForm = true; |
| 822 | encodedDisp >>= 2; |
| 823 | } |
| 824 | break; |
| 825 | } |
| 826 | if (LOWREG(rDest) && (rBase == r15pc) && |
| 827 | (displacement <= 1020) && (displacement >= 0)) { |
| 828 | shortForm = true; |
| 829 | encodedDisp >>= 2; |
| 830 | opcode = kThumbLdrPcRel; |
| 831 | } else if (LOWREG(rDest) && (rBase == r13sp) && |
| 832 | (displacement <= 1020) && (displacement >= 0)) { |
| 833 | shortForm = true; |
| 834 | encodedDisp >>= 2; |
| 835 | opcode = kThumbLdrSpRel; |
| 836 | } else if (allLowRegs && displacement < 128 && displacement >= 0) { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 837 | DCHECK_EQ((displacement & 0x3), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 838 | shortForm = true; |
| 839 | encodedDisp >>= 2; |
| 840 | opcode = kThumbLdrRRI5; |
| 841 | } else if (thumb2Form) { |
| 842 | shortForm = true; |
| 843 | opcode = kThumb2LdrRRI12; |
| 844 | } |
| 845 | break; |
| 846 | case kUnsignedHalf: |
| 847 | if (allLowRegs && displacement < 64 && displacement >= 0) { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 848 | DCHECK_EQ((displacement & 0x1), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 849 | shortForm = true; |
| 850 | encodedDisp >>= 1; |
| 851 | opcode = kThumbLdrhRRI5; |
| 852 | } else if (displacement < 4092 && displacement >= 0) { |
| 853 | shortForm = true; |
| 854 | opcode = kThumb2LdrhRRI12; |
| 855 | } |
| 856 | break; |
| 857 | case kSignedHalf: |
| 858 | if (thumb2Form) { |
| 859 | shortForm = true; |
| 860 | opcode = kThumb2LdrshRRI12; |
| 861 | } |
| 862 | break; |
| 863 | case kUnsignedByte: |
| 864 | if (allLowRegs && displacement < 32 && displacement >= 0) { |
| 865 | shortForm = true; |
| 866 | opcode = kThumbLdrbRRI5; |
| 867 | } else if (thumb2Form) { |
| 868 | shortForm = true; |
| 869 | opcode = kThumb2LdrbRRI12; |
| 870 | } |
| 871 | break; |
| 872 | case kSignedByte: |
| 873 | if (thumb2Form) { |
| 874 | shortForm = true; |
| 875 | opcode = kThumb2LdrsbRRI12; |
| 876 | } |
| 877 | break; |
| 878 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 879 | LOG(FATAL) << "Bad size: " << (int)size; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 880 | } |
| 881 | |
| 882 | if (shortForm) { |
| 883 | load = res = newLIR3(cUnit, opcode, rDest, rBase, encodedDisp); |
| 884 | } else { |
| 885 | int regOffset = oatAllocTemp(cUnit); |
| 886 | res = loadConstant(cUnit, regOffset, encodedDisp); |
| 887 | load = loadBaseIndexed(cUnit, rBase, regOffset, rDest, 0, size); |
| 888 | oatFreeTemp(cUnit, regOffset); |
| 889 | } |
| 890 | |
| 891 | // TODO: in future may need to differentiate Dalvik accesses w/ spills |
| 892 | if (rBase == rSP) { |
| 893 | annotateDalvikRegAccess(load, displacement >> 2, true /* isLoad */); |
| 894 | } |
| 895 | return load; |
| 896 | } |
| 897 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 898 | LIR* loadBaseDisp(CompilationUnit* cUnit, MIR* mir, int rBase, |
| 899 | int displacement, int rDest, OpSize size, int sReg) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 900 | { |
| 901 | return loadBaseDispBody(cUnit, mir, rBase, displacement, rDest, -1, |
| 902 | size, sReg); |
| 903 | } |
| 904 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 905 | LIR* loadBaseDispWide(CompilationUnit* cUnit, MIR* mir, int rBase, |
| 906 | int displacement, int rDestLo, int rDestHi, int sReg) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 907 | { |
| 908 | return loadBaseDispBody(cUnit, mir, rBase, displacement, rDestLo, rDestHi, |
| 909 | kLong, sReg); |
| 910 | } |
| 911 | |
| 912 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 913 | LIR* storeBaseDispBody(CompilationUnit* cUnit, int rBase, int displacement, |
| 914 | int rSrc, int rSrcHi, OpSize size) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 915 | { |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 916 | LIR* res, *store; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 917 | ArmOpcode opcode = kThumbBkpt; |
| 918 | bool shortForm = false; |
| 919 | bool thumb2Form = (displacement < 4092 && displacement >= 0); |
| 920 | bool allLowRegs = (LOWREG(rBase) && LOWREG(rSrc)); |
| 921 | int encodedDisp = displacement; |
| 922 | |
| 923 | switch (size) { |
| 924 | case kLong: |
| 925 | case kDouble: |
| 926 | if (!FPREG(rSrc)) { |
| 927 | res = storeBaseDispBody(cUnit, rBase, displacement, rSrc, |
| 928 | -1, kWord); |
| 929 | storeBaseDispBody(cUnit, rBase, displacement + 4, rSrcHi, |
| 930 | -1, kWord); |
| 931 | return res; |
| 932 | } |
| 933 | if (SINGLEREG(rSrc)) { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 934 | DCHECK(FPREG(rSrcHi)); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 935 | rSrc = S2D(rSrc, rSrcHi); |
| 936 | } |
| 937 | opcode = kThumb2Vstrd; |
| 938 | if (displacement <= 1020) { |
| 939 | shortForm = true; |
| 940 | encodedDisp >>= 2; |
| 941 | } |
| 942 | break; |
| 943 | case kSingle: |
| 944 | case kWord: |
| 945 | if (FPREG(rSrc)) { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 946 | DCHECK(SINGLEREG(rSrc)); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 947 | opcode = kThumb2Vstrs; |
| 948 | if (displacement <= 1020) { |
| 949 | shortForm = true; |
| 950 | encodedDisp >>= 2; |
| 951 | } |
| 952 | break; |
| 953 | } |
| 954 | if (allLowRegs && displacement < 128 && displacement >= 0) { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 955 | DCHECK_EQ((displacement & 0x3), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 956 | shortForm = true; |
| 957 | encodedDisp >>= 2; |
| 958 | opcode = kThumbStrRRI5; |
| 959 | } else if (thumb2Form) { |
| 960 | shortForm = true; |
| 961 | opcode = kThumb2StrRRI12; |
| 962 | } |
| 963 | break; |
| 964 | case kUnsignedHalf: |
| 965 | case kSignedHalf: |
| 966 | if (allLowRegs && displacement < 64 && displacement >= 0) { |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 967 | DCHECK_EQ((displacement & 0x1), 0); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 968 | shortForm = true; |
| 969 | encodedDisp >>= 1; |
| 970 | opcode = kThumbStrhRRI5; |
| 971 | } else if (thumb2Form) { |
| 972 | shortForm = true; |
| 973 | opcode = kThumb2StrhRRI12; |
| 974 | } |
| 975 | break; |
| 976 | case kUnsignedByte: |
| 977 | case kSignedByte: |
| 978 | if (allLowRegs && displacement < 32 && displacement >= 0) { |
| 979 | shortForm = true; |
| 980 | opcode = kThumbStrbRRI5; |
| 981 | } else if (thumb2Form) { |
| 982 | shortForm = true; |
| 983 | opcode = kThumb2StrbRRI12; |
| 984 | } |
| 985 | break; |
| 986 | default: |
buzbee | ed3e930 | 2011-09-23 17:34:19 -0700 | [diff] [blame] | 987 | LOG(FATAL) << "Bad size: " << (int)size; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 988 | } |
| 989 | if (shortForm) { |
| 990 | store = res = newLIR3(cUnit, opcode, rSrc, rBase, encodedDisp); |
| 991 | } else { |
| 992 | int rScratch = oatAllocTemp(cUnit); |
| 993 | res = loadConstant(cUnit, rScratch, encodedDisp); |
| 994 | store = storeBaseIndexed(cUnit, rBase, rScratch, rSrc, 0, size); |
| 995 | oatFreeTemp(cUnit, rScratch); |
| 996 | } |
| 997 | |
| 998 | // TODO: In future, may need to differentiate Dalvik & spill accesses |
| 999 | if (rBase == rSP) { |
| 1000 | annotateDalvikRegAccess(store, displacement >> 2, false /* isLoad */); |
| 1001 | } |
| 1002 | return res; |
| 1003 | } |
| 1004 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 1005 | LIR* storeBaseDisp(CompilationUnit* cUnit, int rBase, int displacement, |
| 1006 | int rSrc, OpSize size) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1007 | { |
| 1008 | return storeBaseDispBody(cUnit, rBase, displacement, rSrc, -1, size); |
| 1009 | } |
| 1010 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 1011 | LIR* storeBaseDispWide(CompilationUnit* cUnit, int rBase, int displacement, |
| 1012 | int rSrcLo, int rSrcHi) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1013 | { |
| 1014 | return storeBaseDispBody(cUnit, rBase, displacement, rSrcLo, rSrcHi, kLong); |
| 1015 | } |
| 1016 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 1017 | void storePair(CompilationUnit* cUnit, int base, int lowReg, int highReg) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1018 | { |
| 1019 | storeBaseDispWide(cUnit, base, 0, lowReg, highReg); |
| 1020 | } |
| 1021 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 1022 | void loadPair(CompilationUnit* cUnit, int base, int lowReg, int highReg) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1023 | { |
| 1024 | loadBaseDispWide(cUnit, NULL, base, 0, lowReg, highReg, INVALID_SREG); |
| 1025 | } |
| 1026 | |
buzbee | 31a4a6f | 2012-02-28 15:36:15 -0800 | [diff] [blame] | 1027 | LIR* fpRegCopy(CompilationUnit* cUnit, int rDest, int rSrc) |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1028 | { |
buzbee | a2ebdd7 | 2012-03-04 14:57:06 -0800 | [diff] [blame^] | 1029 | int opcode; |
| 1030 | DCHECK_EQ(DOUBLEREG(rDest), DOUBLEREG(rSrc)); |
| 1031 | if (DOUBLEREG(rDest)) { |
| 1032 | opcode = kThumb2Vmovd; |
| 1033 | } else { |
| 1034 | if (SINGLEREG(rDest)) { |
| 1035 | opcode = SINGLEREG(rSrc) ? kThumb2Vmovs : kThumb2Fmsr; |
| 1036 | } else { |
| 1037 | DCHECK(SINGLEREG(rSrc)); |
| 1038 | opcode = kThumb2Fmrs; |
| 1039 | } |
| 1040 | } |
| 1041 | LIR* res = rawLIR(cUnit, cUnit->currentDalvikOffset, opcode, rDest, rSrc); |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1042 | if (rDest == rSrc) { |
| 1043 | res->flags.isNop = true; |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1044 | } |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1045 | return res; |
| 1046 | } |
| 1047 | |
buzbee | 67bf885 | 2011-08-17 17:51:35 -0700 | [diff] [blame] | 1048 | |
Elliott Hughes | 11d1b0c | 2012-01-23 16:57:47 -0800 | [diff] [blame] | 1049 | |
| 1050 | } // namespace art |