1 /*
   2  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "c1/c1_FrameMap.hpp"
  28 #include "c1/c1_LIR.hpp"
  29 #include "runtime/sharedRuntime.hpp"
  30 #include "vmreg_aarch64.inline.hpp"
  31 
  32 LIR_Opr FrameMap::map_to_opr(BasicType type, VMRegPair* reg, bool) {
  33   LIR_Opr opr = LIR_OprFact::illegalOpr;
  34   VMReg r_1 = reg->first();
  35   VMReg r_2 = reg->second();
  36   if (r_1->is_stack()) {
  37     // Convert stack slot to an SP offset
  38     // The calling convention does not count the SharedRuntime::out_preserve_stack_slots() value
  39     // so we must add it in here.
  40     int st_off = (r_1->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size;
  41     opr = LIR_OprFact::address(new LIR_Address(sp_opr, st_off, type));
  42   } else if (r_1->is_Register()) {
  43     Register reg = r_1->as_Register();
  44     if (r_2->is_Register() && (type == T_LONG || type == T_DOUBLE)) {
  45       Register reg2 = r_2->as_Register();
  46       assert(reg2 == reg, "must be same register");
  47       opr = as_long_opr(reg);
  48     } else if (type == T_OBJECT || type == T_ARRAY) {
  49       opr = as_oop_opr(reg);
  50     } else if (type == T_METADATA) {
  51       opr = as_metadata_opr(reg);
  52     } else {
  53       opr = as_opr(reg);
  54     }
  55   } else if (r_1->is_FloatRegister()) {
  56     assert(type == T_DOUBLE || type == T_FLOAT, "wrong type");
  57     int num = r_1->as_FloatRegister()->encoding();
  58     if (type == T_FLOAT) {
  59       opr = LIR_OprFact::single_fpu(num);
  60     } else {
  61       opr = LIR_OprFact::double_fpu(num);
  62     }
  63   } else {
  64     ShouldNotReachHere();
  65   }
  66   return opr;
  67 }
  68 
  69 LIR_Opr FrameMap::r0_opr;
  70 LIR_Opr FrameMap::r1_opr;
  71 LIR_Opr FrameMap::r2_opr;
  72 LIR_Opr FrameMap::r3_opr;
  73 LIR_Opr FrameMap::r4_opr;
  74 LIR_Opr FrameMap::r5_opr;
  75 LIR_Opr FrameMap::r6_opr;
  76 LIR_Opr FrameMap::r7_opr;
  77 LIR_Opr FrameMap::r8_opr;
  78 LIR_Opr FrameMap::r9_opr;
  79 LIR_Opr FrameMap::r10_opr;
  80 LIR_Opr FrameMap::r11_opr;
  81 LIR_Opr FrameMap::r12_opr;
  82 LIR_Opr FrameMap::r13_opr;
  83 LIR_Opr FrameMap::r14_opr;
  84 LIR_Opr FrameMap::r15_opr;
  85 LIR_Opr FrameMap::r16_opr;
  86 LIR_Opr FrameMap::r17_opr;
  87 LIR_Opr FrameMap::r18_opr;
  88 LIR_Opr FrameMap::r19_opr;
  89 LIR_Opr FrameMap::r20_opr;
  90 LIR_Opr FrameMap::r21_opr;
  91 LIR_Opr FrameMap::r22_opr;
  92 LIR_Opr FrameMap::r23_opr;
  93 LIR_Opr FrameMap::r24_opr;
  94 LIR_Opr FrameMap::r25_opr;
  95 LIR_Opr FrameMap::r26_opr;
  96 LIR_Opr FrameMap::r27_opr;
  97 LIR_Opr FrameMap::r28_opr;
  98 LIR_Opr FrameMap::r29_opr;
  99 LIR_Opr FrameMap::r30_opr;
 100 
 101 LIR_Opr FrameMap::rfp_opr;
 102 LIR_Opr FrameMap::sp_opr;
 103 
 104 LIR_Opr FrameMap::receiver_opr;
 105 
 106 LIR_Opr FrameMap::r0_oop_opr;
 107 LIR_Opr FrameMap::r1_oop_opr;
 108 LIR_Opr FrameMap::r2_oop_opr;
 109 LIR_Opr FrameMap::r3_oop_opr;
 110 LIR_Opr FrameMap::r4_oop_opr;
 111 LIR_Opr FrameMap::r5_oop_opr;
 112 LIR_Opr FrameMap::r6_oop_opr;
 113 LIR_Opr FrameMap::r7_oop_opr;
 114 LIR_Opr FrameMap::r8_oop_opr;
 115 LIR_Opr FrameMap::r9_oop_opr;
 116 LIR_Opr FrameMap::r10_oop_opr;
 117 LIR_Opr FrameMap::r11_oop_opr;
 118 LIR_Opr FrameMap::r12_oop_opr;
 119 LIR_Opr FrameMap::r13_oop_opr;
 120 LIR_Opr FrameMap::r14_oop_opr;
 121 LIR_Opr FrameMap::r15_oop_opr;
 122 LIR_Opr FrameMap::r16_oop_opr;
 123 LIR_Opr FrameMap::r17_oop_opr;
 124 LIR_Opr FrameMap::r18_oop_opr;
 125 LIR_Opr FrameMap::r19_oop_opr;
 126 LIR_Opr FrameMap::r20_oop_opr;
 127 LIR_Opr FrameMap::r21_oop_opr;
 128 LIR_Opr FrameMap::r22_oop_opr;
 129 LIR_Opr FrameMap::r23_oop_opr;
 130 LIR_Opr FrameMap::r24_oop_opr;
 131 LIR_Opr FrameMap::r25_oop_opr;
 132 LIR_Opr FrameMap::r26_oop_opr;
 133 LIR_Opr FrameMap::r27_oop_opr;
 134 LIR_Opr FrameMap::r28_oop_opr;
 135 LIR_Opr FrameMap::r29_oop_opr;
 136 LIR_Opr FrameMap::r30_oop_opr;
 137 
 138 LIR_Opr FrameMap::rscratch1_opr;
 139 LIR_Opr FrameMap::rscratch2_opr;
 140 LIR_Opr FrameMap::rscratch1_long_opr;
 141 LIR_Opr FrameMap::rscratch2_long_opr;
 142 
 143 LIR_Opr FrameMap::r0_metadata_opr;
 144 LIR_Opr FrameMap::r1_metadata_opr;
 145 LIR_Opr FrameMap::r2_metadata_opr;
 146 LIR_Opr FrameMap::r3_metadata_opr;
 147 LIR_Opr FrameMap::r4_metadata_opr;
 148 LIR_Opr FrameMap::r5_metadata_opr;
 149 
 150 LIR_Opr FrameMap::long0_opr;
 151 LIR_Opr FrameMap::long1_opr;
 152 LIR_Opr FrameMap::fpu0_float_opr;
 153 LIR_Opr FrameMap::fpu0_double_opr;
 154 
 155 LIR_Opr FrameMap::_caller_save_cpu_regs[] = { 0, };
 156 LIR_Opr FrameMap::_caller_save_fpu_regs[] = { 0, };
 157 
 158 //--------------------------------------------------------
 159 //               FrameMap
 160 //--------------------------------------------------------
 161 
 162 void FrameMap::initialize() {
 163   assert(!_init_done, "once");
 164 
 165   int i=0;
 166   map_register(i, r0); r0_opr = LIR_OprFact::single_cpu(i); i++;
 167   map_register(i, r1); r1_opr = LIR_OprFact::single_cpu(i); i++;
 168   map_register(i, r2); r2_opr = LIR_OprFact::single_cpu(i); i++;
 169   map_register(i, r3); r3_opr = LIR_OprFact::single_cpu(i); i++;
 170   map_register(i, r4); r4_opr = LIR_OprFact::single_cpu(i); i++;
 171   map_register(i, r5); r5_opr = LIR_OprFact::single_cpu(i); i++;
 172   map_register(i, r6); r6_opr = LIR_OprFact::single_cpu(i); i++;
 173   map_register(i, r7); r7_opr = LIR_OprFact::single_cpu(i); i++;
 174   map_register(i, r10); r10_opr = LIR_OprFact::single_cpu(i); i++;
 175   map_register(i, r11); r11_opr = LIR_OprFact::single_cpu(i); i++;
 176   map_register(i, r12); r12_opr = LIR_OprFact::single_cpu(i); i++;
 177   map_register(i, r13); r13_opr = LIR_OprFact::single_cpu(i); i++;
 178   map_register(i, r14); r14_opr = LIR_OprFact::single_cpu(i); i++;
 179   map_register(i, r15); r15_opr = LIR_OprFact::single_cpu(i); i++;
 180   map_register(i, r16); r16_opr = LIR_OprFact::single_cpu(i); i++;
 181   map_register(i, r17); r17_opr = LIR_OprFact::single_cpu(i); i++;
 182   map_register(i, r18); r18_opr = LIR_OprFact::single_cpu(i); i++;
 183   map_register(i, r19); r19_opr = LIR_OprFact::single_cpu(i); i++;
 184   map_register(i, r20); r20_opr = LIR_OprFact::single_cpu(i); i++;
 185   map_register(i, r21); r21_opr = LIR_OprFact::single_cpu(i); i++;
 186   map_register(i, r22); r22_opr = LIR_OprFact::single_cpu(i); i++;
 187   map_register(i, r23); r23_opr = LIR_OprFact::single_cpu(i); i++;
 188   map_register(i, r24); r24_opr = LIR_OprFact::single_cpu(i); i++;
 189   map_register(i, r25); r25_opr = LIR_OprFact::single_cpu(i); i++;
 190   map_register(i, r26); r26_opr = LIR_OprFact::single_cpu(i); i++;
 191 
 192   map_register(i, r27); r27_opr = LIR_OprFact::single_cpu(i); i++; // rheapbase
 193   map_register(i, r28); r28_opr = LIR_OprFact::single_cpu(i); i++; // rthread
 194   map_register(i, r29); r29_opr = LIR_OprFact::single_cpu(i); i++; // rfp
 195   map_register(i, r30); r30_opr = LIR_OprFact::single_cpu(i); i++; // lr
 196   map_register(i, r31_sp); sp_opr = LIR_OprFact::single_cpu(i); i++; // sp
 197   map_register(i, r8); r8_opr = LIR_OprFact::single_cpu(i); i++;   // rscratch1
 198   map_register(i, r9); r9_opr = LIR_OprFact::single_cpu(i); i++;   // rscratch2
 199 
 200   rscratch1_opr = r8_opr;
 201   rscratch2_opr = r9_opr;
 202   rscratch1_long_opr = LIR_OprFact::double_cpu(r8_opr->cpu_regnr(), r8_opr->cpu_regnr());
 203   rscratch2_long_opr = LIR_OprFact::double_cpu(r9_opr->cpu_regnr(), r9_opr->cpu_regnr());
 204 
 205   long0_opr = LIR_OprFact::double_cpu(0, 0);
 206   long1_opr = LIR_OprFact::double_cpu(1, 1);
 207 
 208   fpu0_float_opr   = LIR_OprFact::single_fpu(0);
 209   fpu0_double_opr  = LIR_OprFact::double_fpu(0);
 210 
 211   _caller_save_cpu_regs[0] = r0_opr;
 212   _caller_save_cpu_regs[1] = r1_opr;
 213   _caller_save_cpu_regs[2] = r2_opr;
 214   _caller_save_cpu_regs[3] = r3_opr;
 215   _caller_save_cpu_regs[4] = r4_opr;
 216   _caller_save_cpu_regs[5] = r5_opr;
 217   _caller_save_cpu_regs[6]  = r6_opr;
 218   _caller_save_cpu_regs[7]  = r7_opr;
 219   // rscratch1, rscratch 2 not included
 220   _caller_save_cpu_regs[8] = r10_opr;
 221   _caller_save_cpu_regs[9] = r11_opr;
 222   _caller_save_cpu_regs[10] = r12_opr;
 223   _caller_save_cpu_regs[11] = r13_opr;
 224   _caller_save_cpu_regs[12] = r14_opr;
 225   _caller_save_cpu_regs[13] = r15_opr;
 226   _caller_save_cpu_regs[14] = r16_opr;
 227   _caller_save_cpu_regs[15] = r17_opr;
 228   _caller_save_cpu_regs[16] = r18_opr;
 229 
 230   for (int i = 0; i < 8; i++) {
 231     _caller_save_fpu_regs[i] = LIR_OprFact::single_fpu(i);
 232   }
 233 
 234   _init_done = true;
 235 
 236   r0_oop_opr = as_oop_opr(r0);
 237   r1_oop_opr = as_oop_opr(r1);
 238   r2_oop_opr = as_oop_opr(r2);
 239   r3_oop_opr = as_oop_opr(r3);
 240   r4_oop_opr = as_oop_opr(r4);
 241   r5_oop_opr = as_oop_opr(r5);
 242   r6_oop_opr = as_oop_opr(r6);
 243   r7_oop_opr = as_oop_opr(r7);
 244   r8_oop_opr = as_oop_opr(r8);
 245   r9_oop_opr = as_oop_opr(r9);
 246   r10_oop_opr = as_oop_opr(r10);
 247   r11_oop_opr = as_oop_opr(r11);
 248   r12_oop_opr = as_oop_opr(r12);
 249   r13_oop_opr = as_oop_opr(r13);
 250   r14_oop_opr = as_oop_opr(r14);
 251   r15_oop_opr = as_oop_opr(r15);
 252   r16_oop_opr = as_oop_opr(r16);
 253   r17_oop_opr = as_oop_opr(r17);
 254   r18_oop_opr = as_oop_opr(r18);
 255   r19_oop_opr = as_oop_opr(r19);
 256   r20_oop_opr = as_oop_opr(r20);
 257   r21_oop_opr = as_oop_opr(r21);
 258   r22_oop_opr = as_oop_opr(r22);
 259   r23_oop_opr = as_oop_opr(r23);
 260   r24_oop_opr = as_oop_opr(r24);
 261   r25_oop_opr = as_oop_opr(r25);
 262   r26_oop_opr = as_oop_opr(r26);
 263   r27_oop_opr = as_oop_opr(r27);
 264   r28_oop_opr = as_oop_opr(r28);
 265   r29_oop_opr = as_oop_opr(r29);
 266   r30_oop_opr = as_oop_opr(r30);
 267 
 268   r0_metadata_opr = as_metadata_opr(r0);
 269   r1_metadata_opr = as_metadata_opr(r1);
 270   r2_metadata_opr = as_metadata_opr(r2);
 271   r3_metadata_opr = as_metadata_opr(r3);
 272   r4_metadata_opr = as_metadata_opr(r4);
 273   r5_metadata_opr = as_metadata_opr(r5);
 274 
 275   sp_opr = as_pointer_opr(r31_sp);
 276   rfp_opr = as_pointer_opr(rfp);
 277 
 278   VMRegPair regs;
 279   BasicType sig_bt = T_OBJECT;
 280   SharedRuntime::java_calling_convention(&sig_bt, &regs, 1, true);
 281   receiver_opr = as_oop_opr(regs.first()->as_Register());
 282 
 283   for (int i = 0; i < nof_caller_save_fpu_regs; i++) {
 284     _caller_save_fpu_regs[i] = LIR_OprFact::single_fpu(i);
 285   }
 286 }
 287 
 288 
 289 Address FrameMap::make_new_address(ByteSize sp_offset) const {
 290   // for rbp, based address use this:
 291   // return Address(rbp, in_bytes(sp_offset) - (framesize() - 2) * 4);
 292   return Address(sp, in_bytes(sp_offset));
 293 }
 294 
 295 
 296 // ----------------mapping-----------------------
 297 // all mapping is based on rfp addressing, except for simple leaf methods where we access
 298 // the locals sp based (and no frame is built)
 299 
 300 
 301 // Frame for simple leaf methods (quick entries)
 302 //
 303 //   +----------+
 304 //   | ret addr |   <- TOS
 305 //   +----------+
 306 //   | args     |
 307 //   | ......   |
 308 
 309 // Frame for standard methods
 310 //
 311 //   | .........|  <- TOS
 312 //   | locals   |
 313 //   +----------+
 314 //   |  old fp, |  <- RFP
 315 //   +----------+
 316 //   | ret addr |
 317 //   +----------+
 318 //   |  args    |
 319 //   | .........|
 320 
 321 
 322 // For OopMaps, map a local variable or spill index to an VMRegImpl name.
 323 // This is the offset from sp() in the frame of the slot for the index,
 324 // skewed by VMRegImpl::stack0 to indicate a stack location (vs.a register.)
 325 //
 326 //           framesize +
 327 //           stack0         stack0          0  <- VMReg
 328 //             |              | <registers> |
 329 //  ...........|..............|.............|
 330 //      0 1 2 3 x x 4 5 6 ... |                <- local indices
 331 //      ^           ^        sp()                 ( x x indicate link
 332 //      |           |                               and return addr)
 333 //  arguments   non-argument locals
 334 
 335 
 336 VMReg FrameMap::fpu_regname (int n) {
 337   // Return the OptoReg name for the fpu stack slot "n"
 338   // A spilled fpu stack slot comprises to two single-word OptoReg's.
 339   return as_FloatRegister(n)->as_VMReg();
 340 }
 341 
 342 LIR_Opr FrameMap::stack_pointer() {
 343   return FrameMap::sp_opr;
 344 }
 345 
 346 
 347 // JSR 292
 348 LIR_Opr FrameMap::method_handle_invoke_SP_save_opr() {
 349   return LIR_OprFact::illegalOpr;  // Not needed on aarch64
 350 }
 351 
 352 
 353 bool FrameMap::validate_frame() {
 354   return true;
 355 }