js/src/jit/x64/Architecture-x64.h@6474c204b198
js/src/jit/x64/Architecture-x64.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * vim: set ts=8 sts=4 et sw=4 tw=99:
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #ifndef jit_x64_Architecture_x64_h
8 #define jit_x64_Architecture_x64_h
10 #include "assembler/assembler/MacroAssembler.h"
12 namespace js {
13 namespace jit {
15 // In bytes: slots needed for potential memory->memory move spills.
16 // +8 for cycles
17 // +8 for gpr spills
18 // +8 for double spills
19 static const uint32_t ION_FRAME_SLACK_SIZE = 24;
21 #ifdef _WIN64
22 static const uint32_t ShadowStackSpace = 32;
23 #else
24 static const uint32_t ShadowStackSpace = 0;
25 #endif
27 class Registers {
28 public:
29 typedef JSC::X86Registers::RegisterID Code;
31 static const char *GetName(Code code) {
32 static const char * const Names[] = { "rax", "rcx", "rdx", "rbx",
33 "rsp", "rbp", "rsi", "rdi",
34 "r8", "r9", "r10", "r11",
35 "r12", "r13", "r14", "r15" };
36 return Names[code];
37 }
39 static Code FromName(const char *name) {
40 for (size_t i = 0; i < Total; i++) {
41 if (strcmp(GetName(Code(i)), name) == 0)
42 return Code(i);
43 }
44 return Invalid;
45 }
47 static const Code StackPointer = JSC::X86Registers::esp;
48 static const Code Invalid = JSC::X86Registers::invalid_reg;
50 static const uint32_t Total = 16;
51 static const uint32_t Allocatable = 14;
53 static const uint32_t AllMask = (1 << Total) - 1;
55 static const uint32_t ArgRegMask =
56 # if !defined(_WIN64)
57 (1 << JSC::X86Registers::edi) |
58 (1 << JSC::X86Registers::esi) |
59 # endif
60 (1 << JSC::X86Registers::edx) |
61 (1 << JSC::X86Registers::ecx) |
62 (1 << JSC::X86Registers::r8) |
63 (1 << JSC::X86Registers::r9);
65 static const uint32_t VolatileMask =
66 (1 << JSC::X86Registers::eax) |
67 (1 << JSC::X86Registers::ecx) |
68 (1 << JSC::X86Registers::edx) |
69 # if !defined(_WIN64)
70 (1 << JSC::X86Registers::esi) |
71 (1 << JSC::X86Registers::edi) |
72 # endif
73 (1 << JSC::X86Registers::r8) |
74 (1 << JSC::X86Registers::r9) |
75 (1 << JSC::X86Registers::r10) |
76 (1 << JSC::X86Registers::r11);
78 static const uint32_t NonVolatileMask =
79 (1 << JSC::X86Registers::ebx) |
80 #if defined(_WIN64)
81 (1 << JSC::X86Registers::esi) |
82 (1 << JSC::X86Registers::edi) |
83 #endif
84 (1 << JSC::X86Registers::ebp) |
85 (1 << JSC::X86Registers::r12) |
86 (1 << JSC::X86Registers::r13) |
87 (1 << JSC::X86Registers::r14) |
88 (1 << JSC::X86Registers::r15);
90 static const uint32_t WrapperMask = VolatileMask;
92 static const uint32_t SingleByteRegs = VolatileMask | NonVolatileMask;
94 static const uint32_t NonAllocatableMask =
95 (1 << JSC::X86Registers::esp) |
96 (1 << JSC::X86Registers::r11); // This is ScratchReg.
98 // Registers that can be allocated without being saved, generally.
99 static const uint32_t TempMask = VolatileMask & ~NonAllocatableMask;
101 static const uint32_t AllocatableMask = AllMask & ~NonAllocatableMask;
103 // Registers returned from a JS -> JS call.
104 static const uint32_t JSCallMask =
105 (1 << JSC::X86Registers::ecx);
107 // Registers returned from a JS -> C call.
108 static const uint32_t CallMask =
109 (1 << JSC::X86Registers::eax);
110 };
112 // Smallest integer type that can hold a register bitmask.
113 typedef uint16_t PackedRegisterMask;
115 class FloatRegisters {
116 public:
117 typedef JSC::X86Registers::XMMRegisterID Code;
119 static const char *GetName(Code code) {
120 static const char * const Names[] = { "xmm0", "xmm1", "xmm2", "xmm3",
121 "xmm4", "xmm5", "xmm6", "xmm7",
122 "xmm8", "xmm9", "xmm10", "xmm11",
123 "xmm12", "xmm13", "xmm14", "xmm15" };
124 return Names[code];
125 }
127 static Code FromName(const char *name) {
128 for (size_t i = 0; i < Total; i++) {
129 if (strcmp(GetName(Code(i)), name) == 0)
130 return Code(i);
131 }
132 return Invalid;
133 }
135 static const Code Invalid = JSC::X86Registers::invalid_xmm;
137 static const uint32_t Total = 16;
138 static const uint32_t Allocatable = 15;
140 static const uint32_t AllMask = (1 << Total) - 1;
142 static const uint32_t VolatileMask =
143 #if defined(_WIN64)
144 (1 << JSC::X86Registers::xmm0) |
145 (1 << JSC::X86Registers::xmm1) |
146 (1 << JSC::X86Registers::xmm2) |
147 (1 << JSC::X86Registers::xmm3) |
148 (1 << JSC::X86Registers::xmm4) |
149 (1 << JSC::X86Registers::xmm5);
150 #else
151 AllMask;
152 #endif
154 static const uint32_t NonVolatileMask = AllMask & ~VolatileMask;
156 static const uint32_t WrapperMask = VolatileMask;
158 static const uint32_t NonAllocatableMask =
159 (1 << JSC::X86Registers::xmm15); // This is ScratchFloatReg.
161 static const uint32_t AllocatableMask = AllMask & ~NonAllocatableMask;
162 };
164 } // namespace jit
165 } // namespace js
167 #endif /* jit_x64_Architecture_x64_h */
