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     result.set(ARMRegisters::r10);
  90     result.set(ARMRegisters::r11);
  91 #elif CPU(ARM64)
  92     // We don't include LR in the set of callee-save registers even though it technically belongs
  93     // there. This is because we use this set to describe the set of registers that need to be saved
  94     // beyond what you would save by the platform-agnostic "preserve return address" and "restore
  95     // return address" operations in CCallHelpers.
  96     for (
  97         ARM64Registers::RegisterID reg = ARM64Registers::x19;
  98         reg <= ARM64Registers::x28;
  99         reg = static_cast<ARM64Registers::RegisterID>(reg + 1))
 100         result.set(reg);
 101     result.set(ARM64Registers::fp);
 102     for (
 103         ARM64Registers::FPRegisterID reg = ARM64Registers::q8;
 104         reg <= ARM64Registers::q15;
 105         reg = static_cast<ARM64Registers::FPRegisterID>(reg + 1))
 106         result.set(reg);
 107 #else
 108     UNREACHABLE_FOR_PLATFORM();
 109 #endif
 110     return result;
 111 }
 112
 113 RegisterSet RegisterSet::allGPRs()
 114 {
 115     RegisterSet result;
 116     for (MacroAssembler::RegisterID reg = MacroAssembler::firstRegister(); reg <= MacroAssembler::lastRegister(); reg = static_cast<MacroAssembler::RegisterID>(reg + 1))
 117         result.set(reg);
 118     return result;
 119 }
 120
 121 RegisterSet RegisterSet::allFPRs()
 122 {
 123     RegisterSet result;
 124     for (MacroAssembler::FPRegisterID reg = MacroAssembler::firstFPRegister(); reg <= MacroAssembler::lastFPRegister(); reg = static_cast<MacroAssembler::FPRegisterID>(reg + 1))
 125         result.set(reg);
 126     return result;
 127 }
 128
 129 RegisterSet RegisterSet::allRegisters()
 130 {
 131     RegisterSet result;
 132     result.merge(allGPRs());
 133     result.merge(allFPRs());
 134     return result;
 135 }
 136
 137 size_t RegisterSet::numberOfSetGPRs() const
 138 {
 139     RegisterSet temp = *this;
 140     temp.filter(allGPRs());
 141     return temp.numberOfSetRegisters();
 142 }
 143
 144 size_t RegisterSet::numberOfSetFPRs() const
 145 {
 146     RegisterSet temp = *this;
 147     temp.filter(allFPRs());
 148     return temp.numberOfSetRegisters();
 149 }
 150
 151 void RegisterSet::dump(PrintStream& out) const
 152 {
 153     CommaPrinter comma;
 154     out.print("[");
 155     for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) {
 156         if (get(reg))
 157             out.print(comma, reg);
 158     }
 159     out.print("]");
 160 }
 161
 162 } // namespace JSC
 163
 164 #endif // ENABLE(JIT)
 165