assembler/MacroAssemblerX86.h

   1 /*
   2  * Copyright (C) 2008, 2014 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef MacroAssemblerX86_h
  27 #define MacroAssemblerX86_h
  28
  29 #if ENABLE(ASSEMBLER) && CPU(X86)
  30
  31 #include "MacroAssemblerX86Common.h"
  32
  33 namespace JSC {
  34
  35 class MacroAssemblerX86 : public MacroAssemblerX86Common {
  36 public:
  37     static const Scale ScalePtr = TimesFour;
  38
  39     using MacroAssemblerX86Common::add32;
  40     using MacroAssemblerX86Common::and32;
  41     using MacroAssemblerX86Common::branchAdd32;
  42     using MacroAssemblerX86Common::branchSub32;
  43     using MacroAssemblerX86Common::sub32;
  44     using MacroAssemblerX86Common::or32;
  45     using MacroAssemblerX86Common::load32;
  46     using MacroAssemblerX86Common::load8;
  47     using MacroAssemblerX86Common::store32;
  48     using MacroAssemblerX86Common::store8;
  49     using MacroAssemblerX86Common::branch32;
  50     using MacroAssemblerX86Common::call;
  51     using MacroAssemblerX86Common::jump;
  52     using MacroAssemblerX86Common::addDouble;
  53     using MacroAssemblerX86Common::loadDouble;
  54     using MacroAssemblerX86Common::storeDouble;
  55     using MacroAssemblerX86Common::convertInt32ToDouble;
  56     using MacroAssemblerX86Common::branch8;
  57     using MacroAssemblerX86Common::branchTest8;
  58
  59     void add32(TrustedImm32 imm, RegisterID src, RegisterID dest)
  60     {
  61         m_assembler.leal_mr(imm.m_value, src, dest);
  62     }
  63
  64     void add32(TrustedImm32 imm, AbsoluteAddress address)
  65     {
  66         m_assembler.addl_im(imm.m_value, address.m_ptr);
  67     }
  68
  69     void add32(AbsoluteAddress address, RegisterID dest)
  70     {
  71         m_assembler.addl_mr(address.m_ptr, dest);
  72     }
  73
  74     void add64(TrustedImm32 imm, AbsoluteAddress address)
  75     {
  76         m_assembler.addl_im(imm.m_value, address.m_ptr);
  77         m_assembler.adcl_im(imm.m_value >> 31, reinterpret_cast<const char*>(address.m_ptr) + sizeof(int32_t));
  78     }
  79
  80     void and32(TrustedImm32 imm, AbsoluteAddress address)
  81     {
  82         m_assembler.andl_im(imm.m_value, address.m_ptr);
  83     }
  84
  85     void or32(TrustedImm32 imm, AbsoluteAddress address)
  86     {
  87         m_assembler.orl_im(imm.m_value, address.m_ptr);
  88     }
  89
  90     void or32(RegisterID reg, AbsoluteAddress address)
  91     {
  92         m_assembler.orl_rm(reg, address.m_ptr);
  93     }
  94
  95     void sub32(TrustedImm32 imm, AbsoluteAddress address)
  96     {
  97         m_assembler.subl_im(imm.m_value, address.m_ptr);
  98     }
  99
 100     void load32(const void* address, RegisterID dest)
 101     {
 102         m_assembler.movl_mr(address, dest);
 103     }
 104
 105     void load8(const void* address, RegisterID dest)
 106     {
 107         m_assembler.movzbl_mr(address, dest);
 108     }
 109
 110     void abortWithReason(AbortReason reason)
 111     {
 112         move(TrustedImm32(reason), X86Registers::eax);
 113         breakpoint();
 114     }
 115
 116     void abortWithReason(AbortReason reason, intptr_t misc)
 117     {
 118         move(TrustedImm32(misc), X86Registers::edx);
 119         abortWithReason(reason);
 120     }
 121
 122     ConvertibleLoadLabel convertibleLoadPtr(Address address, RegisterID dest)
 123     {
 124         ConvertibleLoadLabel result = ConvertibleLoadLabel(this);
 125         m_assembler.movl_mr(address.offset, address.base, dest);
 126         return result;
 127     }
 128
 129     void addDouble(AbsoluteAddress address, FPRegisterID dest)
 130     {
 131         m_assembler.addsd_mr(address.m_ptr, dest);
 132     }
 133
 134     void storeDouble(FPRegisterID src, TrustedImmPtr address)
 135     {
 136         ASSERT(isSSE2Present());
 137         ASSERT(address.m_value);
 138         m_assembler.movsd_rm(src, address.m_value);
 139     }
 140
 141     void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
 142     {
 143         m_assembler.cvtsi2sd_mr(src.m_ptr, dest);
 144     }
 145
 146     void store32(TrustedImm32 imm, void* address)
 147     {
 148         m_assembler.movl_i32m(imm.m_value, address);
 149     }
 150
 151     void store32(RegisterID src, void* address)
 152     {
 153         m_assembler.movl_rm(src, address);
 154     }
 155
 156     void store8(RegisterID src, void* address)
 157     {
 158         m_assembler.movb_rm(src, address);
 159     }
 160
 161     void store8(TrustedImm32 imm, void* address)
 162     {
 163         ASSERT(-128 <= imm.m_value && imm.m_value < 128);
 164         m_assembler.movb_i8m(imm.m_value, address);
 165     }
 166
 167     void moveDoubleToInts(FPRegisterID src, RegisterID dest1, RegisterID dest2)
 168     {
 169         ASSERT(isSSE2Present());
 170         m_assembler.pextrw_irr(3, src, dest1);
 171         m_assembler.pextrw_irr(2, src, dest2);
 172         lshift32(TrustedImm32(16), dest1);
 173         or32(dest1, dest2);
 174         movePackedToInt32(src, dest1);
 175     }
 176
 177     void moveIntsToDouble(RegisterID src1, RegisterID src2, FPRegisterID dest, FPRegisterID scratch)
 178     {
 179         moveInt32ToPacked(src1, dest);
 180         moveInt32ToPacked(src2, scratch);
 181         lshiftPacked(TrustedImm32(32), scratch);
 182         orPacked(scratch, dest);
 183     }
 184
 185     Jump branchAdd32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest)
 186     {
 187         m_assembler.addl_im(imm.m_value, dest.m_ptr);
 188         return Jump(m_assembler.jCC(x86Condition(cond)));
 189     }
 190
 191     Jump branchSub32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest)
 192     {
 193         m_assembler.subl_im(imm.m_value, dest.m_ptr);
 194         return Jump(m_assembler.jCC(x86Condition(cond)));
 195     }
 196
 197     Jump branch32(RelationalCondition cond, AbsoluteAddress left, RegisterID right)
 198     {
 199         m_assembler.cmpl_rm(right, left.m_ptr);
 200         return Jump(m_assembler.jCC(x86Condition(cond)));
 201     }
 202
 203     Jump branch32(RelationalCondition cond, AbsoluteAddress left, TrustedImm32 right)
 204     {
 205         m_assembler.cmpl_im(right.m_value, left.m_ptr);
 206         return Jump(m_assembler.jCC(x86Condition(cond)));
 207     }
 208
 209     Call call()
 210     {
 211         return Call(m_assembler.call(), Call::Linkable);
 212     }
 213
 214     // Address is a memory location containing the address to jump to
 215     void jump(AbsoluteAddress address)
 216     {
 217         m_assembler.jmp_m(address.m_ptr);
 218     }
 219
 220     Call tailRecursiveCall()
 221     {
 222         return Call::fromTailJump(jump());
 223     }
 224
 225     Call makeTailRecursiveCall(Jump oldJump)
 226     {
 227         return Call::fromTailJump(oldJump);
 228     }
 229
 230
 231     DataLabelPtr moveWithPatch(TrustedImmPtr initialValue, RegisterID dest)
 232     {
 233         padBeforePatch();
 234         m_assembler.movl_i32r(initialValue.asIntptr(), dest);
 235         return DataLabelPtr(this);
 236     }
 237
 238     Jump branch8(RelationalCondition cond, AbsoluteAddress left, TrustedImm32 right)
 239     {
 240         m_assembler.cmpb_im(right.m_value, left.m_ptr);
 241         return Jump(m_assembler.jCC(x86Condition(cond)));
 242     }
 243
 244     Jump branchTest8(ResultCondition cond, AbsoluteAddress address, TrustedImm32 mask = TrustedImm32(-1))
 245     {
 246         ASSERT(mask.m_value >= -128 && mask.m_value <= 255);
 247         if (mask.m_value == -1)
 248             m_assembler.cmpb_im(0, address.m_ptr);
 249         else
 250             m_assembler.testb_im(mask.m_value, address.m_ptr);
 251         return Jump(m_assembler.jCC(x86Condition(cond)));
 252     }
 253
 254     Jump branchPtrWithPatch(RelationalCondition cond, RegisterID left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
 255     {
 256         padBeforePatch();
 257         m_assembler.cmpl_ir_force32(initialRightValue.asIntptr(), left);
 258         dataLabel = DataLabelPtr(this);
 259         return Jump(m_assembler.jCC(x86Condition(cond)));
 260     }
 261
 262     Jump branchPtrWithPatch(RelationalCondition cond, Address left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
 263     {
 264         padBeforePatch();
 265         m_assembler.cmpl_im_force32(initialRightValue.asIntptr(), left.offset, left.base);
 266         dataLabel = DataLabelPtr(this);
 267         return Jump(m_assembler.jCC(x86Condition(cond)));
 268     }
 269
 270     Jump branch32WithPatch(RelationalCondition cond, Address left, DataLabel32& dataLabel, TrustedImm32 initialRightValue = TrustedImm32(0))
 271     {
 272         padBeforePatch();
 273         m_assembler.cmpl_im_force32(initialRightValue.m_value, left.offset, left.base);
 274         dataLabel = DataLabel32(this);
 275         return Jump(m_assembler.jCC(x86Condition(cond)));
 276     }
 277
 278     DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address)
 279     {
 280         padBeforePatch();
 281         m_assembler.movl_i32m(initialValue.asIntptr(), address.offset, address.base);
 282         return DataLabelPtr(this);
 283     }
 284
 285     static bool supportsFloatingPoint() { return isSSE2Present(); }
 286     static bool supportsFloatingPointTruncate() { return isSSE2Present(); }
 287     static bool supportsFloatingPointSqrt() { return isSSE2Present(); }
 288     static bool supportsFloatingPointAbs() { return isSSE2Present(); }
 289
 290     static FunctionPtr readCallTarget(CodeLocationCall call)
 291     {
 292         intptr_t offset = reinterpret_cast<int32_t*>(call.dataLocation())[-1];
 293         return FunctionPtr(reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(call.dataLocation()) + offset));
 294     }
 295
 296     static bool canJumpReplacePatchableBranchPtrWithPatch() { return true; }
 297     static bool canJumpReplacePatchableBranch32WithPatch() { return true; }
 298
 299     static CodeLocationLabel startOfBranchPtrWithPatchOnRegister(CodeLocationDataLabelPtr label)
 300     {
 301         const int opcodeBytes = 1;
 302         const int modRMBytes = 1;
 303         const int immediateBytes = 4;
 304         const int totalBytes = opcodeBytes + modRMBytes + immediateBytes;
 305         ASSERT(totalBytes >= maxJumpReplacementSize());
 306         return label.labelAtOffset(-totalBytes);
 307     }
 308
 309     static CodeLocationLabel startOfPatchableBranchPtrWithPatchOnAddress(CodeLocationDataLabelPtr label)
 310     {
 311         const int opcodeBytes = 1;
 312         const int modRMBytes = 1;
 313         const int offsetBytes = 0;
 314         const int immediateBytes = 4;
 315         const int totalBytes = opcodeBytes + modRMBytes + offsetBytes + immediateBytes;
 316         ASSERT(totalBytes >= maxJumpReplacementSize());
 317         return label.labelAtOffset(-totalBytes);
 318     }
 319
 320     static CodeLocationLabel startOfPatchableBranch32WithPatchOnAddress(CodeLocationDataLabel32 label)
 321     {
 322         const int opcodeBytes = 1;
 323         const int modRMBytes = 1;
 324         const int offsetBytes = 0;
 325         const int immediateBytes = 4;
 326         const int totalBytes = opcodeBytes + modRMBytes + offsetBytes + immediateBytes;
 327         ASSERT(totalBytes >= maxJumpReplacementSize());
 328         return label.labelAtOffset(-totalBytes);
 329     }
 330
 331     static void revertJumpReplacementToBranchPtrWithPatch(CodeLocationLabel instructionStart, RegisterID reg, void* initialValue)
 332     {
 333         X86Assembler::revertJumpTo_cmpl_ir_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), reg);
 334     }
 335
 336     static void revertJumpReplacementToPatchableBranchPtrWithPatch(CodeLocationLabel instructionStart, Address address, void* initialValue)
 337     {
 338         ASSERT(!address.offset);
 339         X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), 0, address.base);
 340     }
 341
 342     static void revertJumpReplacementToPatchableBranch32WithPatch(CodeLocationLabel instructionStart, Address address, int32_t initialValue)
 343     {
 344         ASSERT(!address.offset);
 345         X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), initialValue, 0, address.base);
 346     }
 347
 348 private:
 349     friend class LinkBuffer;
 350     friend class RepatchBuffer;
 351
 352     static void linkCall(void* code, Call call, FunctionPtr function)
 353     {
 354         X86Assembler::linkCall(code, call.m_label, function.value());
 355     }
 356
 357     static void repatchCall(CodeLocationCall call, CodeLocationLabel destination)
 358     {
 359         X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
 360     }
 361
 362     static void repatchCall(CodeLocationCall call, FunctionPtr destination)
 363     {
 364         X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
 365     }
 366 };
 367
 368 } // namespace JSC
 369
 370 #endif // ENABLE(ASSEMBLER)
 371
 372 #endif // MacroAssemblerX86_h