1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit/Registers.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,147 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef jit_Registers_h
1.11 +#define jit_Registers_h
1.12 +
1.13 +#include "mozilla/Array.h"
1.14 +
1.15 +#include "jit/IonTypes.h"
1.16 +#if defined(JS_CODEGEN_X86)
1.17 +# include "jit/x86/Architecture-x86.h"
1.18 +#elif defined(JS_CODEGEN_X64)
1.19 +# include "jit/x64/Architecture-x64.h"
1.20 +#elif defined(JS_CODEGEN_ARM)
1.21 +# include "jit/arm/Architecture-arm.h"
1.22 +#elif defined(JS_CODEGEN_MIPS)
1.23 +# include "jit/mips/Architecture-mips.h"
1.24 +#else
1.25 +# error "Unknown architecture!"
1.26 +#endif
1.27 +
1.28 +namespace js {
1.29 +namespace jit {
1.30 +
1.31 +struct Register {
1.32 + typedef Registers Codes;
1.33 + typedef Codes::Code Code;
1.34 + Code code_;
1.35 +
1.36 + static Register FromCode(uint32_t i) {
1.37 + JS_ASSERT(i < Registers::Total);
1.38 + Register r = { (Registers::Code)i };
1.39 + return r;
1.40 + }
1.41 + static Register FromName(const char *name) {
1.42 + Registers::Code code = Registers::FromName(name);
1.43 + Register r = { code };
1.44 + return r;
1.45 + }
1.46 + Code code() const {
1.47 + JS_ASSERT((uint32_t)code_ < Registers::Total);
1.48 + return code_;
1.49 + }
1.50 + const char *name() const {
1.51 + return Registers::GetName(code());
1.52 + }
1.53 + bool operator ==(const Register &other) const {
1.54 + return code_ == other.code_;
1.55 + }
1.56 + bool operator !=(const Register &other) const {
1.57 + return code_ != other.code_;
1.58 + }
1.59 + bool volatile_() const {
1.60 + return !!((1 << code()) & Registers::VolatileMask);
1.61 + }
1.62 +};
1.63 +
1.64 +struct FloatRegister {
1.65 + typedef FloatRegisters Codes;
1.66 + typedef Codes::Code Code;
1.67 +
1.68 + Code code_;
1.69 +
1.70 + static FloatRegister FromCode(uint32_t i) {
1.71 + JS_ASSERT(i < FloatRegisters::Total);
1.72 + FloatRegister r = { (FloatRegisters::Code)i };
1.73 + return r;
1.74 + }
1.75 + static FloatRegister FromName(const char *name) {
1.76 + FloatRegisters::Code code = FloatRegisters::FromName(name);
1.77 + FloatRegister r = { code };
1.78 + return r;
1.79 + }
1.80 + Code code() const {
1.81 + JS_ASSERT((uint32_t)code_ < FloatRegisters::Total);
1.82 + return code_;
1.83 + }
1.84 + const char *name() const {
1.85 + return FloatRegisters::GetName(code());
1.86 + }
1.87 + bool operator ==(const FloatRegister &other) const {
1.88 + return code_ == other.code_;
1.89 + }
1.90 + bool operator !=(const FloatRegister &other) const {
1.91 + return code_ != other.code_;
1.92 + }
1.93 + bool volatile_() const {
1.94 + return !!((1 << code()) & FloatRegisters::VolatileMask);
1.95 + }
1.96 +};
1.97 +
1.98 +class RegisterDump
1.99 +{
1.100 + protected: // Silence Clang warning.
1.101 + mozilla::Array<uintptr_t, Registers::Total> regs_;
1.102 + mozilla::Array<double, FloatRegisters::Total> fpregs_;
1.103 +
1.104 + public:
1.105 + static size_t offsetOfRegister(Register reg) {
1.106 + return offsetof(RegisterDump, regs_) + reg.code() * sizeof(uintptr_t);
1.107 + }
1.108 + static size_t offsetOfRegister(FloatRegister reg) {
1.109 + return offsetof(RegisterDump, fpregs_) + reg.code() * sizeof(double);
1.110 + }
1.111 +};
1.112 +
1.113 +// Information needed to recover machine register state.
1.114 +class MachineState
1.115 +{
1.116 + mozilla::Array<uintptr_t *, Registers::Total> regs_;
1.117 + mozilla::Array<double *, FloatRegisters::Total> fpregs_;
1.118 +
1.119 + public:
1.120 + static MachineState FromBailout(mozilla::Array<uintptr_t, Registers::Total> ®s,
1.121 + mozilla::Array<double, FloatRegisters::Total> &fpregs);
1.122 +
1.123 + void setRegisterLocation(Register reg, uintptr_t *up) {
1.124 + regs_[reg.code()] = up;
1.125 + }
1.126 + void setRegisterLocation(FloatRegister reg, double *dp) {
1.127 + fpregs_[reg.code()] = dp;
1.128 + }
1.129 +
1.130 + bool has(Register reg) const {
1.131 + return regs_[reg.code()] != nullptr;
1.132 + }
1.133 + bool has(FloatRegister reg) const {
1.134 + return fpregs_[reg.code()] != nullptr;
1.135 + }
1.136 + uintptr_t read(Register reg) const {
1.137 + return *regs_[reg.code()];
1.138 + }
1.139 + double read(FloatRegister reg) const {
1.140 + return *fpregs_[reg.code()];
1.141 + }
1.142 + void write(Register reg, uintptr_t value) const {
1.143 + *regs_[reg.code()] = value;
1.144 + }
1.145 +};
1.146 +
1.147 +} // namespace jit
1.148 +} // namespace js
1.149 +
1.150 +#endif /* jit_Registers_h */
