1 /*
   2  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "c1/c1_FrameMap.hpp"
  27 #include "c1/c1_LIR.hpp"
  28 #include "runtime/sharedRuntime.hpp"
  29 #include "vmreg_x86.inline.hpp"
  30 
  31 const int FrameMap::pd_c_runtime_reserved_arg_size = 0;
  32 
  33 LIR_Opr FrameMap::map_to_opr(BasicType type, VMRegPair* reg, bool) {
  34   LIR_Opr opr = LIR_OprFact::illegalOpr;
  35   VMReg r_1 = reg->first();
  36   VMReg r_2 = reg->second();
  37   if (r_1->is_stack()) {
  38     // Convert stack slot to an SP offset
  39     // The calling convention does not count the SharedRuntime::out_preserve_stack_slots() value
  40     // so we must add it in here.
  41     int st_off = (r_1->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size;
  42     opr = LIR_OprFact::address(new LIR_Address(rsp_opr, st_off, type));
  43   } else if (r_1->is_Register()) {
  44     Register reg = r_1->as_Register();
  45     if (r_2->is_Register() && (type == T_LONG || type == T_DOUBLE)) {
  46       Register reg2 = r_2->as_Register();
  47 #ifdef _LP64
  48       assert(reg2 == reg, "must be same register");
  49       opr = as_long_opr(reg);
  50 #else
  51       opr = as_long_opr(reg2, reg);
  52 #endif // _LP64
  53     } else if (type == T_OBJECT || type == T_ARRAY) {
  54       opr = as_oop_opr(reg);
  55     } else if (type == T_METADATA) {
  56       opr = as_metadata_opr(reg);
  57     } else {
  58       opr = as_opr(reg);
  59     }
  60   } else if (r_1->is_FloatRegister()) {
  61     assert(type == T_DOUBLE || type == T_FLOAT, "wrong type");
  62     int num = r_1->as_FloatRegister()->encoding();
  63     if (type == T_FLOAT) {
  64       opr = LIR_OprFact::single_fpu(num);
  65     } else {
  66       opr = LIR_OprFact::double_fpu(num);
  67     }
  68   } else if (r_1->is_XMMRegister()) {
  69     assert(type == T_DOUBLE || type == T_FLOAT, "wrong type");
  70     int num = r_1->as_XMMRegister()->encoding();
  71     if (type == T_FLOAT) {
  72       opr = LIR_OprFact::single_xmm(num);
  73     } else {
  74       opr = LIR_OprFact::double_xmm(num);
  75     }
  76   } else {
  77     ShouldNotReachHere();
  78   }
  79   return opr;
  80 }
  81 
  82 
  83 LIR_Opr FrameMap::rsi_opr;
  84 LIR_Opr FrameMap::rdi_opr;
  85 LIR_Opr FrameMap::rbx_opr;
  86 LIR_Opr FrameMap::rax_opr;
  87 LIR_Opr FrameMap::rdx_opr;
  88 LIR_Opr FrameMap::rcx_opr;
  89 LIR_Opr FrameMap::rsp_opr;
  90 LIR_Opr FrameMap::rbp_opr;
  91 
  92 LIR_Opr FrameMap::receiver_opr;
  93 
  94 LIR_Opr FrameMap::rsi_oop_opr;
  95 LIR_Opr FrameMap::rdi_oop_opr;
  96 LIR_Opr FrameMap::rbx_oop_opr;
  97 LIR_Opr FrameMap::rax_oop_opr;
  98 LIR_Opr FrameMap::rdx_oop_opr;
  99 LIR_Opr FrameMap::rcx_oop_opr;
 100 
 101 LIR_Opr FrameMap::rsi_metadata_opr;
 102 LIR_Opr FrameMap::rdi_metadata_opr;
 103 LIR_Opr FrameMap::rbx_metadata_opr;
 104 LIR_Opr FrameMap::rax_metadata_opr;
 105 LIR_Opr FrameMap::rdx_metadata_opr;
 106 LIR_Opr FrameMap::rcx_metadata_opr;
 107 
 108 LIR_Opr FrameMap::long0_opr;
 109 LIR_Opr FrameMap::long1_opr;
 110 LIR_Opr FrameMap::fpu0_float_opr;
 111 LIR_Opr FrameMap::fpu0_double_opr;
 112 LIR_Opr FrameMap::xmm0_float_opr;
 113 LIR_Opr FrameMap::xmm0_double_opr;
 114 
 115 #ifdef _LP64
 116 
 117 LIR_Opr  FrameMap::r8_opr;
 118 LIR_Opr  FrameMap::r9_opr;
 119 LIR_Opr FrameMap::r10_opr;
 120 LIR_Opr FrameMap::r11_opr;
 121 LIR_Opr FrameMap::r12_opr;
 122 LIR_Opr FrameMap::r13_opr;
 123 LIR_Opr FrameMap::r14_opr;
 124 LIR_Opr FrameMap::r15_opr;
 125 
 126 // r10 and r15 can never contain oops since they aren't available to
 127 // the allocator
 128 LIR_Opr  FrameMap::r8_oop_opr;
 129 LIR_Opr  FrameMap::r9_oop_opr;
 130 LIR_Opr FrameMap::r11_oop_opr;
 131 LIR_Opr FrameMap::r12_oop_opr;
 132 LIR_Opr FrameMap::r13_oop_opr;
 133 LIR_Opr FrameMap::r14_oop_opr;
 134 
 135 LIR_Opr  FrameMap::r8_metadata_opr;
 136 LIR_Opr  FrameMap::r9_metadata_opr;
 137 LIR_Opr FrameMap::r11_metadata_opr;
 138 LIR_Opr FrameMap::r12_metadata_opr;
 139 LIR_Opr FrameMap::r13_metadata_opr;
 140 LIR_Opr FrameMap::r14_metadata_opr;
 141 #endif // _LP64
 142 
 143 LIR_Opr FrameMap::_caller_save_cpu_regs[] = { 0, };
 144 LIR_Opr FrameMap::_caller_save_fpu_regs[] = { 0, };
 145 LIR_Opr FrameMap::_caller_save_xmm_regs[] = { 0, };
 146 
 147 XMMRegister FrameMap::_xmm_regs [] = { 0, };
 148 
 149 XMMRegister FrameMap::nr2xmmreg(int rnr) {
 150   assert(_init_done, "tables not initialized");
 151   return _xmm_regs[rnr];
 152 }
 153 
 154 //--------------------------------------------------------
 155 //               FrameMap
 156 //--------------------------------------------------------
 157 
 158 void FrameMap::initialize() {
 159   assert(!_init_done, "once");
 160 
 161   assert(nof_cpu_regs == LP64_ONLY(16) NOT_LP64(8), "wrong number of CPU registers");
 162   map_register(0, rsi);  rsi_opr = LIR_OprFact::single_cpu(0);
 163   map_register(1, rdi);  rdi_opr = LIR_OprFact::single_cpu(1);
 164   map_register(2, rbx);  rbx_opr = LIR_OprFact::single_cpu(2);
 165   map_register(3, rax);  rax_opr = LIR_OprFact::single_cpu(3);
 166   map_register(4, rdx);  rdx_opr = LIR_OprFact::single_cpu(4);
 167   map_register(5, rcx);  rcx_opr = LIR_OprFact::single_cpu(5);
 168 
 169 #ifndef _LP64
 170   // The unallocatable registers are at the end
 171   map_register(6, rsp);
 172   map_register(7, rbp);
 173 #else
 174   map_register( 6, r8);    r8_opr = LIR_OprFact::single_cpu(6);
 175   map_register( 7, r9);    r9_opr = LIR_OprFact::single_cpu(7);
 176   map_register( 8, r11);  r11_opr = LIR_OprFact::single_cpu(8);
 177   map_register( 9, r13);  r13_opr = LIR_OprFact::single_cpu(9);
 178   map_register(10, r14);  r14_opr = LIR_OprFact::single_cpu(10);
 179   // r12 is allocated conditionally. With compressed oops it holds
 180   // the heapbase value and is not visible to the allocator.
 181   map_register(11, r12);  r12_opr = LIR_OprFact::single_cpu(11);
 182   // The unallocatable registers are at the end
 183   map_register(12, r10);  r10_opr = LIR_OprFact::single_cpu(12);
 184   map_register(13, r15);  r15_opr = LIR_OprFact::single_cpu(13);
 185   map_register(14, rsp);
 186   map_register(15, rbp);
 187 #endif // _LP64
 188 
 189 #ifdef _LP64
 190   long0_opr = LIR_OprFact::double_cpu(3 /*eax*/, 3 /*eax*/);
 191   long1_opr = LIR_OprFact::double_cpu(2 /*ebx*/, 2 /*ebx*/);
 192 #else
 193   long0_opr = LIR_OprFact::double_cpu(3 /*eax*/, 4 /*edx*/);
 194   long1_opr = LIR_OprFact::double_cpu(2 /*ebx*/, 5 /*ecx*/);
 195 #endif // _LP64
 196   fpu0_float_opr   = LIR_OprFact::single_fpu(0);
 197   fpu0_double_opr  = LIR_OprFact::double_fpu(0);
 198   xmm0_float_opr   = LIR_OprFact::single_xmm(0);
 199   xmm0_double_opr  = LIR_OprFact::double_xmm(0);
 200 
 201   _caller_save_cpu_regs[0] = rsi_opr;
 202   _caller_save_cpu_regs[1] = rdi_opr;
 203   _caller_save_cpu_regs[2] = rbx_opr;
 204   _caller_save_cpu_regs[3] = rax_opr;
 205   _caller_save_cpu_regs[4] = rdx_opr;
 206   _caller_save_cpu_regs[5] = rcx_opr;
 207 
 208 #ifdef _LP64
 209   _caller_save_cpu_regs[6]  = r8_opr;
 210   _caller_save_cpu_regs[7]  = r9_opr;
 211   _caller_save_cpu_regs[8]  = r11_opr;
 212   _caller_save_cpu_regs[9]  = r13_opr;
 213   _caller_save_cpu_regs[10] = r14_opr;
 214   _caller_save_cpu_regs[11] = r12_opr;
 215 #endif // _LP64
 216 
 217 
 218   _xmm_regs[0] = xmm0;
 219   _xmm_regs[1] = xmm1;
 220   _xmm_regs[2] = xmm2;
 221   _xmm_regs[3] = xmm3;
 222   _xmm_regs[4] = xmm4;
 223   _xmm_regs[5] = xmm5;
 224   _xmm_regs[6] = xmm6;
 225   _xmm_regs[7] = xmm7;
 226 
 227 #ifdef _LP64
 228   _xmm_regs[8]   = xmm8;
 229   _xmm_regs[9]   = xmm9;
 230   _xmm_regs[10]  = xmm10;
 231   _xmm_regs[11]  = xmm11;
 232   _xmm_regs[12]  = xmm12;
 233   _xmm_regs[13]  = xmm13;
 234   _xmm_regs[14]  = xmm14;
 235   _xmm_regs[15]  = xmm15;
 236 #endif // _LP64
 237 
 238   for (int i = 0; i < 8; i++) {
 239     _caller_save_fpu_regs[i] = LIR_OprFact::single_fpu(i);
 240   }
 241 
 242   for (int i = 0; i < nof_caller_save_xmm_regs ; i++) {
 243     _caller_save_xmm_regs[i] = LIR_OprFact::single_xmm(i);
 244   }
 245 
 246   _init_done = true;
 247 
 248   rsi_oop_opr = as_oop_opr(rsi);
 249   rdi_oop_opr = as_oop_opr(rdi);
 250   rbx_oop_opr = as_oop_opr(rbx);
 251   rax_oop_opr = as_oop_opr(rax);
 252   rdx_oop_opr = as_oop_opr(rdx);
 253   rcx_oop_opr = as_oop_opr(rcx);
 254 
 255   rsi_metadata_opr = as_metadata_opr(rsi);
 256   rdi_metadata_opr = as_metadata_opr(rdi);
 257   rbx_metadata_opr = as_metadata_opr(rbx);
 258   rax_metadata_opr = as_metadata_opr(rax);
 259   rdx_metadata_opr = as_metadata_opr(rdx);
 260   rcx_metadata_opr = as_metadata_opr(rcx);
 261 
 262   rsp_opr = as_pointer_opr(rsp);
 263   rbp_opr = as_pointer_opr(rbp);
 264 
 265 #ifdef _LP64
 266   r8_oop_opr = as_oop_opr(r8);
 267   r9_oop_opr = as_oop_opr(r9);
 268   r11_oop_opr = as_oop_opr(r11);
 269   r12_oop_opr = as_oop_opr(r12);
 270   r13_oop_opr = as_oop_opr(r13);
 271   r14_oop_opr = as_oop_opr(r14);
 272 
 273   r8_metadata_opr = as_metadata_opr(r8);
 274   r9_metadata_opr = as_metadata_opr(r9);
 275   r11_metadata_opr = as_metadata_opr(r11);
 276   r12_metadata_opr = as_metadata_opr(r12);
 277   r13_metadata_opr = as_metadata_opr(r13);
 278   r14_metadata_opr = as_metadata_opr(r14);
 279 #endif // _LP64
 280 
 281   VMRegPair regs;
 282   BasicType sig_bt = T_OBJECT;
 283   SharedRuntime::java_calling_convention(&sig_bt, &regs, 1, true);
 284   receiver_opr = as_oop_opr(regs.first()->as_Register());
 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(rsp, in_bytes(sp_offset));
 293 }
 294 
 295 
 296 // ----------------mapping-----------------------
 297 // all mapping is based on rbp, addressing, except for simple leaf methods where we access
 298 // the locals rsp 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 rbp,  |  <- EBP
 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::rsp_opr;
 344 }
 345 
 346 // JSR 292
 347 // On x86, there is no need to save the SP, because neither
 348 // method handle intrinsics, nor compiled lambda forms modify it.
 349 LIR_Opr FrameMap::method_handle_invoke_SP_save_opr() {
 350   return LIR_OprFact::illegalOpr;
 351 }
 352 
 353 bool FrameMap::validate_frame() {
 354   return true;
 355 }