jit/RegisterSet.cpp

   1 /*
   2  * Copyright (C) 2013, 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 #include "config.h"
  27 #include "RegisterSet.h"
  28
  29 #if ENABLE(JIT)
  30
  31 #include "GPRInfo.h"
  32 #include "MacroAssembler.h"
  33 #include "JSCInlines.h"
  34 #include <wtf/CommaPrinter.h>
  35
  36 namespace JSC {
  37
  38 RegisterSet RegisterSet::stackRegisters()
  39 {
  40     return RegisterSet(
  41         MacroAssembler::stackPointerRegister,
  42         MacroAssembler::framePointerRegister);
  43 }
  44
  45 RegisterSet RegisterSet::reservedHardwareRegisters()
  46 {
  47 #if CPU(ARM64)
  48     return RegisterSet(ARM64Registers::lr);
  49 #else
  50     return RegisterSet();
  51 #endif
  52 }
  53
  54 RegisterSet RegisterSet::runtimeRegisters()
  55 {
  56 #if USE(JSVALUE64)
  57     return RegisterSet(GPRInfo::tagTypeNumberRegister, GPRInfo::tagMaskRegister);
  58 #else
  59     return RegisterSet();
  60 #endif
  61 }
  62
  63 RegisterSet RegisterSet::specialRegisters()
  64 {
  65     return RegisterSet(
  66         stackRegisters(), reservedHardwareRegisters(), runtimeRegisters());
  67 }
  68
  69 RegisterSet RegisterSet::calleeSaveRegisters()
  70 {
  71     RegisterSet result;
  72 #if CPU(X86)
  73     result.set(X86Registers::ebx);
  74     result.set(X86Registers::ebp);
  75     result.set(X86Registers::edi);
  76     result.set(X86Registers::esi);
  77 #elif CPU(X86_64)
  78     result.set(X86Registers::ebx);
  79     result.set(X86Registers::ebp);
  80     result.set(X86Registers::r12);
  81     result.set(X86Registers::r13);
  82     result.set(X86Registers::r14);
  83     result.set(X86Registers::r15);
  84 #elif CPU(ARM_THUMB2)
  85     result.set(ARMRegisters::r4);
  86     result.set(ARMRegisters::r5);
  87     result.set(ARMRegisters::r6);
  88     result.set(ARMRegisters::r8);
  89 #if !PLATFORM(IOS)
  90     result.set(ARMRegisters::r9);
  91 #endif
  92     result.set(ARMRegisters::r10);
  93     result.set(ARMRegisters::r11);
  94 #elif CPU(ARM_TRADITIONAL)
  95     result.set(ARMRegisters::r4);
  96     result.set(ARMRegisters::r5);
  97     result.set(ARMRegisters::r6);
  98     result.set(ARMRegisters::r7);
  99     result.set(ARMRegisters::r8);
 100     result.set(ARMRegisters::r9);
 101     result.set(ARMRegisters::r10);
 102     result.set(ARMRegisters::r11);
 103 #elif CPU(ARM64)
 104     // We don't include LR in the set of callee-save registers even though it technically belongs
 105     // there. This is because we use this set to describe the set of registers that need to be saved
 106     // beyond what you would save by the platform-agnostic "preserve return address" and "restore
 107     // return address" operations in CCallHelpers.
 108     for (
 109         ARM64Registers::RegisterID reg = ARM64Registers::x19;
 110         reg <= ARM64Registers::x28;
 111         reg = static_cast<ARM64Registers::RegisterID>(reg + 1))
 112         result.set(reg);
 113     result.set(ARM64Registers::fp);
 114     for (
 115         ARM64Registers::FPRegisterID reg = ARM64Registers::q8;
 116         reg <= ARM64Registers::q15;
 117         reg = static_cast<ARM64Registers::FPRegisterID>(reg + 1))
 118         result.set(reg);
 119 #else
 120     UNREACHABLE_FOR_PLATFORM();
 121 #endif
 122     return result;
 123 }
 124
 125 RegisterSet RegisterSet::allGPRs()
 126 {
 127     RegisterSet result;
 128     for (MacroAssembler::RegisterID reg = MacroAssembler::firstRegister(); reg <= MacroAssembler::lastRegister(); reg = static_cast<MacroAssembler::RegisterID>(reg + 1))
 129         result.set(reg);
 130     return result;
 131 }
 132
 133 RegisterSet RegisterSet::allFPRs()
 134 {
 135     RegisterSet result;
 136     for (MacroAssembler::FPRegisterID reg = MacroAssembler::firstFPRegister(); reg <= MacroAssembler::lastFPRegister(); reg = static_cast<MacroAssembler::FPRegisterID>(reg + 1))
 137         result.set(reg);
 138     return result;
 139 }
 140
 141 RegisterSet RegisterSet::allRegisters()
 142 {
 143     RegisterSet result;
 144     result.merge(allGPRs());
 145     result.merge(allFPRs());
 146     return result;
 147 }
 148
 149 size_t RegisterSet::numberOfSetGPRs() const
 150 {
 151     RegisterSet temp = *this;
 152     temp.filter(allGPRs());
 153     return temp.numberOfSetRegisters();
 154 }
 155
 156 size_t RegisterSet::numberOfSetFPRs() const
 157 {
 158     RegisterSet temp = *this;
 159     temp.filter(allFPRs());
 160     return temp.numberOfSetRegisters();
 161 }
 162
 163 void RegisterSet::dump(PrintStream& out) const
 164 {
 165     CommaPrinter comma;
 166     out.print("[");
 167     for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) {
 168         if (get(reg))
 169             out.print(comma, reg);
 170     }
 171     out.print("]");
 172 }
 173
 174 } // namespace JSC
 175
 176 #endif // ENABLE(JIT)
 177