1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit/x64/Architecture-x64.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,167 @@
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_x64_Architecture_x64_h
1.11 +#define jit_x64_Architecture_x64_h
1.12 +
1.13 +#include "assembler/assembler/MacroAssembler.h"
1.14 +
1.15 +namespace js {
1.16 +namespace jit {
1.17 +
1.18 +// In bytes: slots needed for potential memory->memory move spills.
1.19 +// +8 for cycles
1.20 +// +8 for gpr spills
1.21 +// +8 for double spills
1.22 +static const uint32_t ION_FRAME_SLACK_SIZE = 24;
1.23 +
1.24 +#ifdef _WIN64
1.25 +static const uint32_t ShadowStackSpace = 32;
1.26 +#else
1.27 +static const uint32_t ShadowStackSpace = 0;
1.28 +#endif
1.29 +
1.30 +class Registers {
1.31 + public:
1.32 + typedef JSC::X86Registers::RegisterID Code;
1.33 +
1.34 + static const char *GetName(Code code) {
1.35 + static const char * const Names[] = { "rax", "rcx", "rdx", "rbx",
1.36 + "rsp", "rbp", "rsi", "rdi",
1.37 + "r8", "r9", "r10", "r11",
1.38 + "r12", "r13", "r14", "r15" };
1.39 + return Names[code];
1.40 + }
1.41 +
1.42 + static Code FromName(const char *name) {
1.43 + for (size_t i = 0; i < Total; i++) {
1.44 + if (strcmp(GetName(Code(i)), name) == 0)
1.45 + return Code(i);
1.46 + }
1.47 + return Invalid;
1.48 + }
1.49 +
1.50 + static const Code StackPointer = JSC::X86Registers::esp;
1.51 + static const Code Invalid = JSC::X86Registers::invalid_reg;
1.52 +
1.53 + static const uint32_t Total = 16;
1.54 + static const uint32_t Allocatable = 14;
1.55 +
1.56 + static const uint32_t AllMask = (1 << Total) - 1;
1.57 +
1.58 + static const uint32_t ArgRegMask =
1.59 +# if !defined(_WIN64)
1.60 + (1 << JSC::X86Registers::edi) |
1.61 + (1 << JSC::X86Registers::esi) |
1.62 +# endif
1.63 + (1 << JSC::X86Registers::edx) |
1.64 + (1 << JSC::X86Registers::ecx) |
1.65 + (1 << JSC::X86Registers::r8) |
1.66 + (1 << JSC::X86Registers::r9);
1.67 +
1.68 + static const uint32_t VolatileMask =
1.69 + (1 << JSC::X86Registers::eax) |
1.70 + (1 << JSC::X86Registers::ecx) |
1.71 + (1 << JSC::X86Registers::edx) |
1.72 +# if !defined(_WIN64)
1.73 + (1 << JSC::X86Registers::esi) |
1.74 + (1 << JSC::X86Registers::edi) |
1.75 +# endif
1.76 + (1 << JSC::X86Registers::r8) |
1.77 + (1 << JSC::X86Registers::r9) |
1.78 + (1 << JSC::X86Registers::r10) |
1.79 + (1 << JSC::X86Registers::r11);
1.80 +
1.81 + static const uint32_t NonVolatileMask =
1.82 + (1 << JSC::X86Registers::ebx) |
1.83 +#if defined(_WIN64)
1.84 + (1 << JSC::X86Registers::esi) |
1.85 + (1 << JSC::X86Registers::edi) |
1.86 +#endif
1.87 + (1 << JSC::X86Registers::ebp) |
1.88 + (1 << JSC::X86Registers::r12) |
1.89 + (1 << JSC::X86Registers::r13) |
1.90 + (1 << JSC::X86Registers::r14) |
1.91 + (1 << JSC::X86Registers::r15);
1.92 +
1.93 + static const uint32_t WrapperMask = VolatileMask;
1.94 +
1.95 + static const uint32_t SingleByteRegs = VolatileMask | NonVolatileMask;
1.96 +
1.97 + static const uint32_t NonAllocatableMask =
1.98 + (1 << JSC::X86Registers::esp) |
1.99 + (1 << JSC::X86Registers::r11); // This is ScratchReg.
1.100 +
1.101 + // Registers that can be allocated without being saved, generally.
1.102 + static const uint32_t TempMask = VolatileMask & ~NonAllocatableMask;
1.103 +
1.104 + static const uint32_t AllocatableMask = AllMask & ~NonAllocatableMask;
1.105 +
1.106 + // Registers returned from a JS -> JS call.
1.107 + static const uint32_t JSCallMask =
1.108 + (1 << JSC::X86Registers::ecx);
1.109 +
1.110 + // Registers returned from a JS -> C call.
1.111 + static const uint32_t CallMask =
1.112 + (1 << JSC::X86Registers::eax);
1.113 +};
1.114 +
1.115 +// Smallest integer type that can hold a register bitmask.
1.116 +typedef uint16_t PackedRegisterMask;
1.117 +
1.118 +class FloatRegisters {
1.119 + public:
1.120 + typedef JSC::X86Registers::XMMRegisterID Code;
1.121 +
1.122 + static const char *GetName(Code code) {
1.123 + static const char * const Names[] = { "xmm0", "xmm1", "xmm2", "xmm3",
1.124 + "xmm4", "xmm5", "xmm6", "xmm7",
1.125 + "xmm8", "xmm9", "xmm10", "xmm11",
1.126 + "xmm12", "xmm13", "xmm14", "xmm15" };
1.127 + return Names[code];
1.128 + }
1.129 +
1.130 + static Code FromName(const char *name) {
1.131 + for (size_t i = 0; i < Total; i++) {
1.132 + if (strcmp(GetName(Code(i)), name) == 0)
1.133 + return Code(i);
1.134 + }
1.135 + return Invalid;
1.136 + }
1.137 +
1.138 + static const Code Invalid = JSC::X86Registers::invalid_xmm;
1.139 +
1.140 + static const uint32_t Total = 16;
1.141 + static const uint32_t Allocatable = 15;
1.142 +
1.143 + static const uint32_t AllMask = (1 << Total) - 1;
1.144 +
1.145 + static const uint32_t VolatileMask =
1.146 +#if defined(_WIN64)
1.147 + (1 << JSC::X86Registers::xmm0) |
1.148 + (1 << JSC::X86Registers::xmm1) |
1.149 + (1 << JSC::X86Registers::xmm2) |
1.150 + (1 << JSC::X86Registers::xmm3) |
1.151 + (1 << JSC::X86Registers::xmm4) |
1.152 + (1 << JSC::X86Registers::xmm5);
1.153 +#else
1.154 + AllMask;
1.155 +#endif
1.156 +
1.157 + static const uint32_t NonVolatileMask = AllMask & ~VolatileMask;
1.158 +
1.159 + static const uint32_t WrapperMask = VolatileMask;
1.160 +
1.161 + static const uint32_t NonAllocatableMask =
1.162 + (1 << JSC::X86Registers::xmm15); // This is ScratchFloatReg.
1.163 +
1.164 + static const uint32_t AllocatableMask = AllMask & ~NonAllocatableMask;
1.165 +};
1.166 +
1.167 +} // namespace jit
1.168 +} // namespace js
1.169 +
1.170 +#endif /* jit_x64_Architecture_x64_h */
