Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 | // 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 are |
| 6 | // met: |
| 7 | // |
| 8 | // - Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // |
| 11 | // - Redistribution in binary form must reproduce the above copyright |
| 12 | // notice, this list of conditions and the following disclaimer in the |
| 13 | // documentation and/or other materials provided with the distribution. |
| 14 | // |
| 15 | // - Neither the name of Sun Microsystems or the names of contributors may |
| 16 | // be used to endorse or promote products derived from this software without |
| 17 | // specific prior written permission. |
| 18 | // |
| 19 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | |
| 31 | // The original source code covered by the above license above has been |
| 32 | // modified significantly by Google Inc. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 33 | // Copyright 2012 the V8 project authors. All rights reserved. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | |
| 35 | // A lightweight X64 Assembler. |
| 36 | |
| 37 | #ifndef V8_X64_ASSEMBLER_X64_H_ |
| 38 | #define V8_X64_ASSEMBLER_X64_H_ |
| 39 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 40 | #include "serialize.h" |
| 41 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 42 | namespace v8 { |
| 43 | namespace internal { |
| 44 | |
| 45 | // Utility functions |
| 46 | |
| 47 | // Test whether a 64-bit value is in a specific range. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 48 | inline bool is_uint32(int64_t x) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 49 | static const uint64_t kMaxUInt32 = V8_UINT64_C(0xffffffff); |
| 50 | return static_cast<uint64_t>(x) <= kMaxUInt32; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 51 | } |
| 52 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 53 | inline bool is_int32(int64_t x) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 54 | static const int64_t kMinInt32 = -V8_INT64_C(0x80000000); |
| 55 | return is_uint32(x - kMinInt32); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 56 | } |
| 57 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 58 | inline bool uint_is_int32(uint64_t x) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 59 | static const uint64_t kMaxInt32 = V8_UINT64_C(0x7fffffff); |
| 60 | return x <= kMaxInt32; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 61 | } |
| 62 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 63 | inline bool is_uint32(uint64_t x) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 64 | static const uint64_t kMaxUInt32 = V8_UINT64_C(0xffffffff); |
| 65 | return x <= kMaxUInt32; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | // CPU Registers. |
| 69 | // |
| 70 | // 1) We would prefer to use an enum, but enum values are assignment- |
| 71 | // compatible with int, which has caused code-generation bugs. |
| 72 | // |
| 73 | // 2) We would prefer to use a class instead of a struct but we don't like |
| 74 | // the register initialization to depend on the particular initialization |
| 75 | // order (which appears to be different on OS X, Linux, and Windows for the |
| 76 | // installed versions of C++ we tried). Using a struct permits C-style |
| 77 | // "initialization". Also, the Register objects cannot be const as this |
| 78 | // forces initialization stubs in MSVC, making us dependent on initialization |
| 79 | // order. |
| 80 | // |
| 81 | // 3) By not using an enum, we are possibly preventing the compiler from |
| 82 | // doing certain constant folds, which may significantly reduce the |
| 83 | // code generated for some assembly instructions (because they boil down |
| 84 | // to a few constants). If this is a problem, we could change the code |
| 85 | // such that we use an enum in optimized mode, and the struct in debug |
| 86 | // mode. This way we get the compile-time error checking in debug mode |
| 87 | // and best performance in optimized code. |
| 88 | // |
| 89 | |
| 90 | struct Register { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 91 | // The non-allocatable registers are: |
| 92 | // rsp - stack pointer |
| 93 | // rbp - frame pointer |
| 94 | // rsi - context register |
| 95 | // r10 - fixed scratch register |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 96 | // r12 - smi constant register |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 97 | // r13 - root register |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 98 | static const int kNumRegisters = 16; |
| 99 | static const int kNumAllocatableRegisters = 10; |
| 100 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 101 | static int ToAllocationIndex(Register reg) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 102 | return kAllocationIndexByRegisterCode[reg.code()]; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | static Register FromAllocationIndex(int index) { |
| 106 | ASSERT(index >= 0 && index < kNumAllocatableRegisters); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 107 | Register result = { kRegisterCodeByAllocationIndex[index] }; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 108 | return result; |
| 109 | } |
| 110 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 111 | static const char* AllocationIndexToString(int index) { |
| 112 | ASSERT(index >= 0 && index < kNumAllocatableRegisters); |
| 113 | const char* const names[] = { |
| 114 | "rax", |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 115 | "rbx", |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 116 | "rdx", |
| 117 | "rcx", |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 118 | "rdi", |
| 119 | "r8", |
| 120 | "r9", |
| 121 | "r11", |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 122 | "r14", |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 123 | "r15" |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 124 | }; |
| 125 | return names[index]; |
| 126 | } |
| 127 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 128 | static Register from_code(int code) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 129 | Register r = { code }; |
| 130 | return r; |
| 131 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 132 | bool is_valid() const { return 0 <= code_ && code_ < kNumRegisters; } |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 133 | bool is(Register reg) const { return code_ == reg.code_; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 134 | // rax, rbx, rcx and rdx are byte registers, the rest are not. |
| 135 | bool is_byte_register() const { return code_ <= 3; } |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 136 | int code() const { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 137 | ASSERT(is_valid()); |
| 138 | return code_; |
| 139 | } |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 140 | int bit() const { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 141 | return 1 << code_; |
| 142 | } |
| 143 | |
| 144 | // Return the high bit of the register code as a 0 or 1. Used often |
| 145 | // when constructing the REX prefix byte. |
| 146 | int high_bit() const { |
| 147 | return code_ >> 3; |
| 148 | } |
| 149 | // Return the 3 low bits of the register code. Used when encoding registers |
| 150 | // in modR/M, SIB, and opcode bytes. |
| 151 | int low_bits() const { |
| 152 | return code_ & 0x7; |
| 153 | } |
| 154 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 155 | // Unfortunately we can't make this private in a struct when initializing |
| 156 | // by assignment. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 157 | int code_; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 158 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 159 | private: |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 160 | static const int kRegisterCodeByAllocationIndex[kNumAllocatableRegisters]; |
| 161 | static const int kAllocationIndexByRegisterCode[kNumRegisters]; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 162 | }; |
| 163 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 164 | const int kRegister_rax_Code = 0; |
| 165 | const int kRegister_rcx_Code = 1; |
| 166 | const int kRegister_rdx_Code = 2; |
| 167 | const int kRegister_rbx_Code = 3; |
| 168 | const int kRegister_rsp_Code = 4; |
| 169 | const int kRegister_rbp_Code = 5; |
| 170 | const int kRegister_rsi_Code = 6; |
| 171 | const int kRegister_rdi_Code = 7; |
| 172 | const int kRegister_r8_Code = 8; |
| 173 | const int kRegister_r9_Code = 9; |
| 174 | const int kRegister_r10_Code = 10; |
| 175 | const int kRegister_r11_Code = 11; |
| 176 | const int kRegister_r12_Code = 12; |
| 177 | const int kRegister_r13_Code = 13; |
| 178 | const int kRegister_r14_Code = 14; |
| 179 | const int kRegister_r15_Code = 15; |
| 180 | const int kRegister_no_reg_Code = -1; |
| 181 | |
| 182 | const Register rax = { kRegister_rax_Code }; |
| 183 | const Register rcx = { kRegister_rcx_Code }; |
| 184 | const Register rdx = { kRegister_rdx_Code }; |
| 185 | const Register rbx = { kRegister_rbx_Code }; |
| 186 | const Register rsp = { kRegister_rsp_Code }; |
| 187 | const Register rbp = { kRegister_rbp_Code }; |
| 188 | const Register rsi = { kRegister_rsi_Code }; |
| 189 | const Register rdi = { kRegister_rdi_Code }; |
| 190 | const Register r8 = { kRegister_r8_Code }; |
| 191 | const Register r9 = { kRegister_r9_Code }; |
| 192 | const Register r10 = { kRegister_r10_Code }; |
| 193 | const Register r11 = { kRegister_r11_Code }; |
| 194 | const Register r12 = { kRegister_r12_Code }; |
| 195 | const Register r13 = { kRegister_r13_Code }; |
| 196 | const Register r14 = { kRegister_r14_Code }; |
| 197 | const Register r15 = { kRegister_r15_Code }; |
| 198 | const Register no_reg = { kRegister_no_reg_Code }; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 199 | |
| 200 | |
| 201 | struct XMMRegister { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 202 | static const int kNumRegisters = 16; |
| 203 | static const int kNumAllocatableRegisters = 15; |
| 204 | |
| 205 | static int ToAllocationIndex(XMMRegister reg) { |
| 206 | ASSERT(reg.code() != 0); |
| 207 | return reg.code() - 1; |
| 208 | } |
| 209 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 210 | static XMMRegister FromAllocationIndex(int index) { |
| 211 | ASSERT(0 <= index && index < kNumAllocatableRegisters); |
| 212 | XMMRegister result = { index + 1 }; |
| 213 | return result; |
| 214 | } |
| 215 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 216 | static const char* AllocationIndexToString(int index) { |
| 217 | ASSERT(index >= 0 && index < kNumAllocatableRegisters); |
| 218 | const char* const names[] = { |
| 219 | "xmm1", |
| 220 | "xmm2", |
| 221 | "xmm3", |
| 222 | "xmm4", |
| 223 | "xmm5", |
| 224 | "xmm6", |
| 225 | "xmm7", |
| 226 | "xmm8", |
| 227 | "xmm9", |
| 228 | "xmm10", |
| 229 | "xmm11", |
| 230 | "xmm12", |
| 231 | "xmm13", |
| 232 | "xmm14", |
| 233 | "xmm15" |
| 234 | }; |
| 235 | return names[index]; |
| 236 | } |
| 237 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 238 | static XMMRegister from_code(int code) { |
| 239 | ASSERT(code >= 0); |
| 240 | ASSERT(code < kNumRegisters); |
| 241 | XMMRegister r = { code }; |
| 242 | return r; |
| 243 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 244 | bool is_valid() const { return 0 <= code_ && code_ < kNumRegisters; } |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 245 | bool is(XMMRegister reg) const { return code_ == reg.code_; } |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 246 | int code() const { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 247 | ASSERT(is_valid()); |
| 248 | return code_; |
| 249 | } |
| 250 | |
| 251 | // Return the high bit of the register code as a 0 or 1. Used often |
| 252 | // when constructing the REX prefix byte. |
| 253 | int high_bit() const { |
| 254 | return code_ >> 3; |
| 255 | } |
| 256 | // Return the 3 low bits of the register code. Used when encoding registers |
| 257 | // in modR/M, SIB, and opcode bytes. |
| 258 | int low_bits() const { |
| 259 | return code_ & 0x7; |
| 260 | } |
| 261 | |
| 262 | int code_; |
| 263 | }; |
| 264 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 265 | const XMMRegister xmm0 = { 0 }; |
| 266 | const XMMRegister xmm1 = { 1 }; |
| 267 | const XMMRegister xmm2 = { 2 }; |
| 268 | const XMMRegister xmm3 = { 3 }; |
| 269 | const XMMRegister xmm4 = { 4 }; |
| 270 | const XMMRegister xmm5 = { 5 }; |
| 271 | const XMMRegister xmm6 = { 6 }; |
| 272 | const XMMRegister xmm7 = { 7 }; |
| 273 | const XMMRegister xmm8 = { 8 }; |
| 274 | const XMMRegister xmm9 = { 9 }; |
| 275 | const XMMRegister xmm10 = { 10 }; |
| 276 | const XMMRegister xmm11 = { 11 }; |
| 277 | const XMMRegister xmm12 = { 12 }; |
| 278 | const XMMRegister xmm13 = { 13 }; |
| 279 | const XMMRegister xmm14 = { 14 }; |
| 280 | const XMMRegister xmm15 = { 15 }; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 281 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 282 | |
| 283 | typedef XMMRegister DoubleRegister; |
| 284 | |
| 285 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 286 | enum Condition { |
| 287 | // any value < 0 is considered no_condition |
| 288 | no_condition = -1, |
| 289 | |
| 290 | overflow = 0, |
| 291 | no_overflow = 1, |
| 292 | below = 2, |
| 293 | above_equal = 3, |
| 294 | equal = 4, |
| 295 | not_equal = 5, |
| 296 | below_equal = 6, |
| 297 | above = 7, |
| 298 | negative = 8, |
| 299 | positive = 9, |
| 300 | parity_even = 10, |
| 301 | parity_odd = 11, |
| 302 | less = 12, |
| 303 | greater_equal = 13, |
| 304 | less_equal = 14, |
| 305 | greater = 15, |
| 306 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 307 | // Fake conditions that are handled by the |
| 308 | // opcodes using them. |
| 309 | always = 16, |
| 310 | never = 17, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 311 | // aliases |
| 312 | carry = below, |
| 313 | not_carry = above_equal, |
| 314 | zero = equal, |
| 315 | not_zero = not_equal, |
| 316 | sign = negative, |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 317 | not_sign = positive, |
| 318 | last_condition = greater |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 319 | }; |
| 320 | |
| 321 | |
| 322 | // Returns the equivalent of !cc. |
| 323 | // Negation of the default no_condition (-1) results in a non-default |
| 324 | // no_condition value (-2). As long as tests for no_condition check |
| 325 | // for condition < 0, this will work as expected. |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 326 | inline Condition NegateCondition(Condition cc) { |
| 327 | return static_cast<Condition>(cc ^ 1); |
| 328 | } |
| 329 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 330 | |
| 331 | // Corresponds to transposing the operands of a comparison. |
| 332 | inline Condition ReverseCondition(Condition cc) { |
| 333 | switch (cc) { |
| 334 | case below: |
| 335 | return above; |
| 336 | case above: |
| 337 | return below; |
| 338 | case above_equal: |
| 339 | return below_equal; |
| 340 | case below_equal: |
| 341 | return above_equal; |
| 342 | case less: |
| 343 | return greater; |
| 344 | case greater: |
| 345 | return less; |
| 346 | case greater_equal: |
| 347 | return less_equal; |
| 348 | case less_equal: |
| 349 | return greater_equal; |
| 350 | default: |
| 351 | return cc; |
| 352 | }; |
| 353 | } |
| 354 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 355 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 356 | // ----------------------------------------------------------------------------- |
| 357 | // Machine instruction Immediates |
| 358 | |
| 359 | class Immediate BASE_EMBEDDED { |
| 360 | public: |
| 361 | explicit Immediate(int32_t value) : value_(value) {} |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 362 | |
| 363 | private: |
| 364 | int32_t value_; |
| 365 | |
| 366 | friend class Assembler; |
| 367 | }; |
| 368 | |
| 369 | |
| 370 | // ----------------------------------------------------------------------------- |
| 371 | // Machine instruction Operands |
| 372 | |
| 373 | enum ScaleFactor { |
| 374 | times_1 = 0, |
| 375 | times_2 = 1, |
| 376 | times_4 = 2, |
| 377 | times_8 = 3, |
| 378 | times_int_size = times_4, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 379 | times_pointer_size = times_8 |
| 380 | }; |
| 381 | |
| 382 | |
| 383 | class Operand BASE_EMBEDDED { |
| 384 | public: |
| 385 | // [base + disp/r] |
| 386 | Operand(Register base, int32_t disp); |
| 387 | |
| 388 | // [base + index*scale + disp/r] |
| 389 | Operand(Register base, |
| 390 | Register index, |
| 391 | ScaleFactor scale, |
| 392 | int32_t disp); |
| 393 | |
| 394 | // [index*scale + disp/r] |
| 395 | Operand(Register index, |
| 396 | ScaleFactor scale, |
| 397 | int32_t disp); |
| 398 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 399 | // Offset from existing memory operand. |
| 400 | // Offset is added to existing displacement as 32-bit signed values and |
| 401 | // this must not overflow. |
| 402 | Operand(const Operand& base, int32_t offset); |
| 403 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 404 | // Checks whether either base or index register is the given register. |
| 405 | // Does not check the "reg" part of the Operand. |
| 406 | bool AddressUsesRegister(Register reg) const; |
| 407 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 408 | // Queries related to the size of the generated instruction. |
| 409 | // Whether the generated instruction will have a REX prefix. |
| 410 | bool requires_rex() const { return rex_ != 0; } |
| 411 | // Size of the ModR/M, SIB and displacement parts of the generated |
| 412 | // instruction. |
| 413 | int operand_size() const { return len_; } |
| 414 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 415 | private: |
| 416 | byte rex_; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 417 | byte buf_[6]; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 418 | // The number of bytes of buf_ in use. |
| 419 | byte len_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 420 | |
| 421 | // Set the ModR/M byte without an encoded 'reg' register. The |
| 422 | // register is encoded later as part of the emit_operand operation. |
| 423 | // set_modrm can be called before or after set_sib and set_disp*. |
| 424 | inline void set_modrm(int mod, Register rm); |
| 425 | |
| 426 | // Set the SIB byte if one is needed. Sets the length to 2 rather than 1. |
| 427 | inline void set_sib(ScaleFactor scale, Register index, Register base); |
| 428 | |
| 429 | // Adds operand displacement fields (offsets added to the memory address). |
| 430 | // Needs to be called after set_sib, not before it. |
| 431 | inline void set_disp8(int disp); |
| 432 | inline void set_disp32(int disp); |
| 433 | |
| 434 | friend class Assembler; |
| 435 | }; |
| 436 | |
| 437 | |
| 438 | // CpuFeatures keeps track of which features are supported by the target CPU. |
| 439 | // Supported features must be enabled by a Scope before use. |
| 440 | // Example: |
| 441 | // if (CpuFeatures::IsSupported(SSE3)) { |
| 442 | // CpuFeatures::Scope fscope(SSE3); |
| 443 | // // Generate SSE3 floating point code. |
| 444 | // } else { |
| 445 | // // Generate standard x87 or SSE2 floating point code. |
| 446 | // } |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 447 | class CpuFeatures : public AllStatic { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 448 | public: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 449 | // Detect features of the target CPU. Set safe defaults if the serializer |
| 450 | // is enabled (snapshots must be portable). |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 451 | static void Probe(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 452 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 453 | // Check whether a feature is supported by the target CPU. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 454 | static bool IsSupported(CpuFeature f) { |
| 455 | ASSERT(initialized_); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 456 | if (f == SSE2 && !FLAG_enable_sse2) return false; |
| 457 | if (f == SSE3 && !FLAG_enable_sse3) return false; |
| 458 | if (f == CMOV && !FLAG_enable_cmov) return false; |
| 459 | if (f == RDTSC && !FLAG_enable_rdtsc) return false; |
| 460 | if (f == SAHF && !FLAG_enable_sahf) return false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 461 | return (supported_ & (V8_UINT64_C(1) << f)) != 0; |
| 462 | } |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 463 | |
| 464 | #ifdef DEBUG |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 465 | // Check whether a feature is currently enabled. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 466 | static bool IsEnabled(CpuFeature f) { |
| 467 | ASSERT(initialized_); |
| 468 | Isolate* isolate = Isolate::UncheckedCurrent(); |
| 469 | if (isolate == NULL) { |
| 470 | // When no isolate is available, work as if we're running in |
| 471 | // release mode. |
| 472 | return IsSupported(f); |
| 473 | } |
| 474 | uint64_t enabled = isolate->enabled_cpu_features(); |
| 475 | return (enabled & (V8_UINT64_C(1) << f)) != 0; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 476 | } |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 477 | #endif |
| 478 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 479 | // Enable a specified feature within a scope. |
| 480 | class Scope BASE_EMBEDDED { |
| 481 | #ifdef DEBUG |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 482 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 483 | public: |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 484 | explicit Scope(CpuFeature f) { |
| 485 | uint64_t mask = V8_UINT64_C(1) << f; |
| 486 | ASSERT(CpuFeatures::IsSupported(f)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 487 | ASSERT(!Serializer::enabled() || |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 488 | (CpuFeatures::found_by_runtime_probing_ & mask) == 0); |
| 489 | isolate_ = Isolate::UncheckedCurrent(); |
| 490 | old_enabled_ = 0; |
| 491 | if (isolate_ != NULL) { |
| 492 | old_enabled_ = isolate_->enabled_cpu_features(); |
| 493 | isolate_->set_enabled_cpu_features(old_enabled_ | mask); |
| 494 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 495 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 496 | ~Scope() { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 497 | ASSERT_EQ(Isolate::UncheckedCurrent(), isolate_); |
| 498 | if (isolate_ != NULL) { |
| 499 | isolate_->set_enabled_cpu_features(old_enabled_); |
| 500 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 501 | } |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 502 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 503 | private: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 504 | Isolate* isolate_; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 505 | uint64_t old_enabled_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 506 | #else |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 507 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 508 | public: |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 509 | explicit Scope(CpuFeature f) {} |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 510 | #endif |
| 511 | }; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 512 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 513 | private: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 514 | // Safe defaults include SSE2 and CMOV for X64. It is always available, if |
| 515 | // anyone checks, but they shouldn't need to check. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 516 | // The required user mode extensions in X64 are (from AMD64 ABI Table A.1): |
| 517 | // fpu, tsc, cx8, cmov, mmx, sse, sse2, fxsr, syscall |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 518 | static const uint64_t kDefaultCpuFeatures = (1 << SSE2 | 1 << CMOV); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 519 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 520 | #ifdef DEBUG |
| 521 | static bool initialized_; |
| 522 | #endif |
| 523 | static uint64_t supported_; |
| 524 | static uint64_t found_by_runtime_probing_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 525 | |
| 526 | DISALLOW_COPY_AND_ASSIGN(CpuFeatures); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 527 | }; |
| 528 | |
| 529 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 530 | class Assembler : public AssemblerBase { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 531 | private: |
| 532 | // We check before assembling an instruction that there is sufficient |
| 533 | // space to write an instruction and its relocation information. |
| 534 | // The relocation writer's position must be kGap bytes above the end of |
| 535 | // the generated instructions. This leaves enough space for the |
| 536 | // longest possible x64 instruction, 15 bytes, and the longest possible |
| 537 | // relocation information encoding, RelocInfoWriter::kMaxLength == 16. |
| 538 | // (There is a 15 byte limit on x64 instruction length that rules out some |
| 539 | // otherwise valid instructions.) |
| 540 | // This allows for a single, fast space check per instruction. |
| 541 | static const int kGap = 32; |
| 542 | |
| 543 | public: |
| 544 | // Create an assembler. Instructions and relocation information are emitted |
| 545 | // into a buffer, with the instructions starting from the beginning and the |
| 546 | // relocation information starting from the end of the buffer. See CodeDesc |
| 547 | // for a detailed comment on the layout (globals.h). |
| 548 | // |
| 549 | // If the provided buffer is NULL, the assembler allocates and grows its own |
| 550 | // buffer, and buffer_size determines the initial buffer size. The buffer is |
| 551 | // owned by the assembler and deallocated upon destruction of the assembler. |
| 552 | // |
| 553 | // If the provided buffer is not NULL, the assembler uses the provided buffer |
| 554 | // for code generation and assumes its size to be buffer_size. If the buffer |
| 555 | // is too small, a fatal error occurs. No deallocation of the buffer is done |
| 556 | // upon destruction of the assembler. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 557 | Assembler(Isolate* isolate, void* buffer, int buffer_size); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 558 | ~Assembler(); |
| 559 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 560 | // Overrides the default provided by FLAG_debug_code. |
| 561 | void set_emit_debug_code(bool value) { emit_debug_code_ = value; } |
| 562 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 563 | // GetCode emits any pending (non-emitted) code and fills the descriptor |
| 564 | // desc. GetCode() is idempotent; it returns the same result if no other |
| 565 | // Assembler functions are invoked in between GetCode() calls. |
| 566 | void GetCode(CodeDesc* desc); |
| 567 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 568 | // Read/Modify the code target in the relative branch/call instruction at pc. |
| 569 | // On the x64 architecture, we use relative jumps with a 32-bit displacement |
| 570 | // to jump to other Code objects in the Code space in the heap. |
| 571 | // Jumps to C functions are done indirectly through a 64-bit register holding |
| 572 | // the absolute address of the target. |
| 573 | // These functions convert between absolute Addresses of Code objects and |
| 574 | // the relative displacements stored in the code. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 575 | static inline Address target_address_at(Address pc); |
| 576 | static inline void set_target_address_at(Address pc, Address target); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 577 | |
| 578 | // This sets the branch destination (which is in the instruction on x64). |
| 579 | // This is for calls and branches within generated code. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 580 | inline static void deserialization_set_special_target_at( |
| 581 | Address instruction_payload, Address target) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 582 | set_target_address_at(instruction_payload, target); |
| 583 | } |
| 584 | |
| 585 | // This sets the branch destination (which is a load instruction on x64). |
| 586 | // This is for calls and branches to runtime code. |
| 587 | inline static void set_external_target_at(Address instruction_payload, |
| 588 | Address target) { |
| 589 | *reinterpret_cast<Address*>(instruction_payload) = target; |
| 590 | } |
| 591 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 592 | inline Handle<Object> code_target_object_handle_at(Address pc); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 593 | // Number of bytes taken up by the branch target in the code. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 594 | static const int kSpecialTargetSize = 4; // Use 32-bit displacement. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 595 | // Distance between the address of the code target in the call instruction |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 596 | // and the return address pushed on the stack. |
| 597 | static const int kCallTargetAddressOffset = 4; // Use 32-bit displacement. |
| 598 | // Distance between the start of the JS return sequence and where the |
| 599 | // 32-bit displacement of a near call would be, relative to the pushed |
| 600 | // return address. TODO: Use return sequence length instead. |
| 601 | // Should equal Debug::kX64JSReturnSequenceLength - kCallTargetAddressOffset; |
| 602 | static const int kPatchReturnSequenceAddressOffset = 13 - 4; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 603 | // Distance between start of patched debug break slot and where the |
| 604 | // 32-bit displacement of a near call would be, relative to the pushed |
| 605 | // return address. TODO: Use return sequence length instead. |
| 606 | // Should equal Debug::kX64JSReturnSequenceLength - kCallTargetAddressOffset; |
| 607 | static const int kPatchDebugBreakSlotAddressOffset = 13 - 4; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 608 | // TODO(X64): Rename this, removing the "Real", after changing the above. |
| 609 | static const int kRealPatchReturnSequenceAddressOffset = 2; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 610 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 611 | // Some x64 JS code is padded with int3 to make it large |
| 612 | // enough to hold an instruction when the debugger patches it. |
| 613 | static const int kJumpInstructionLength = 13; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 614 | static const int kCallInstructionLength = 13; |
| 615 | static const int kJSReturnSequenceLength = 13; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 616 | static const int kShortCallInstructionLength = 5; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 617 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 618 | // The debug break slot must be able to contain a call instruction. |
| 619 | static const int kDebugBreakSlotLength = kCallInstructionLength; |
| 620 | |
Steve Block | 9fac840 | 2011-05-12 15:51:54 +0100 | [diff] [blame] | 621 | // One byte opcode for test eax,0xXXXXXXXX. |
| 622 | static const byte kTestEaxByte = 0xA9; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 623 | // One byte opcode for test al, 0xXX. |
| 624 | static const byte kTestAlByte = 0xA8; |
| 625 | // One byte opcode for nop. |
| 626 | static const byte kNopByte = 0x90; |
| 627 | |
| 628 | // One byte prefix for a short conditional jump. |
| 629 | static const byte kJccShortPrefix = 0x70; |
| 630 | static const byte kJncShortOpcode = kJccShortPrefix | not_carry; |
| 631 | static const byte kJcShortOpcode = kJccShortPrefix | carry; |
| 632 | |
| 633 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 634 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 635 | // --------------------------------------------------------------------------- |
| 636 | // Code generation |
| 637 | // |
| 638 | // Function names correspond one-to-one to x64 instruction mnemonics. |
| 639 | // Unless specified otherwise, instructions operate on 64-bit operands. |
| 640 | // |
| 641 | // If we need versions of an assembly instruction that operate on different |
| 642 | // width arguments, we add a single-letter suffix specifying the width. |
| 643 | // This is done for the following instructions: mov, cmp, inc, dec, |
| 644 | // add, sub, and test. |
| 645 | // There are no versions of these instructions without the suffix. |
| 646 | // - Instructions on 8-bit (byte) operands/registers have a trailing 'b'. |
| 647 | // - Instructions on 16-bit (word) operands/registers have a trailing 'w'. |
| 648 | // - Instructions on 32-bit (doubleword) operands/registers use 'l'. |
| 649 | // - Instructions on 64-bit (quadword) operands/registers use 'q'. |
| 650 | // |
| 651 | // Some mnemonics, such as "and", are the same as C++ keywords. |
| 652 | // Naming conflicts with C++ keywords are resolved by adding a trailing '_'. |
| 653 | |
| 654 | // Insert the smallest number of nop instructions |
| 655 | // possible to align the pc offset to a multiple |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 656 | // of m, where m must be a power of 2. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 657 | void Align(int m); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 658 | void Nop(int bytes = 1); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 659 | // Aligns code to something that's optimal for a jump target for the platform. |
| 660 | void CodeTargetAlign(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 661 | |
| 662 | // Stack |
| 663 | void pushfq(); |
| 664 | void popfq(); |
| 665 | |
| 666 | void push(Immediate value); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 667 | // Push a 32 bit integer, and guarantee that it is actually pushed as a |
| 668 | // 32 bit value, the normal push will optimize the 8 bit case. |
| 669 | void push_imm32(int32_t imm32); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 670 | void push(Register src); |
| 671 | void push(const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 672 | |
| 673 | void pop(Register dst); |
| 674 | void pop(const Operand& dst); |
| 675 | |
| 676 | void enter(Immediate size); |
| 677 | void leave(); |
| 678 | |
| 679 | // Moves |
| 680 | void movb(Register dst, const Operand& src); |
| 681 | void movb(Register dst, Immediate imm); |
| 682 | void movb(const Operand& dst, Register src); |
| 683 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 684 | // Move the low 16 bits of a 64-bit register value to a 16-bit |
| 685 | // memory location. |
| 686 | void movw(const Operand& dst, Register src); |
| 687 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 688 | void movl(Register dst, Register src); |
| 689 | void movl(Register dst, const Operand& src); |
| 690 | void movl(const Operand& dst, Register src); |
| 691 | void movl(const Operand& dst, Immediate imm); |
| 692 | // Load a 32-bit immediate value, zero-extended to 64 bits. |
| 693 | void movl(Register dst, Immediate imm32); |
| 694 | |
| 695 | // Move 64 bit register value to 64-bit memory location. |
| 696 | void movq(const Operand& dst, Register src); |
| 697 | // Move 64 bit memory location to 64-bit register value. |
| 698 | void movq(Register dst, const Operand& src); |
| 699 | void movq(Register dst, Register src); |
| 700 | // Sign extends immediate 32-bit value to 64 bits. |
| 701 | void movq(Register dst, Immediate x); |
| 702 | // Move the offset of the label location relative to the current |
| 703 | // position (after the move) to the destination. |
| 704 | void movl(const Operand& dst, Label* src); |
| 705 | |
| 706 | // Move sign extended immediate to memory location. |
| 707 | void movq(const Operand& dst, Immediate value); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 708 | // Instructions to load a 64-bit immediate into a register. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 709 | // All 64-bit immediates must have a relocation mode. |
| 710 | void movq(Register dst, void* ptr, RelocInfo::Mode rmode); |
| 711 | void movq(Register dst, int64_t value, RelocInfo::Mode rmode); |
| 712 | void movq(Register dst, const char* s, RelocInfo::Mode rmode); |
| 713 | // Moves the address of the external reference into the register. |
| 714 | void movq(Register dst, ExternalReference ext); |
| 715 | void movq(Register dst, Handle<Object> handle, RelocInfo::Mode rmode); |
| 716 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 717 | void movsxbq(Register dst, const Operand& src); |
| 718 | void movsxwq(Register dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 719 | void movsxlq(Register dst, Register src); |
| 720 | void movsxlq(Register dst, const Operand& src); |
| 721 | void movzxbq(Register dst, const Operand& src); |
| 722 | void movzxbl(Register dst, const Operand& src); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 723 | void movzxwq(Register dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 724 | void movzxwl(Register dst, const Operand& src); |
| 725 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 726 | // Repeated moves. |
| 727 | |
| 728 | void repmovsb(); |
| 729 | void repmovsw(); |
| 730 | void repmovsl(); |
| 731 | void repmovsq(); |
| 732 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 733 | // Instruction to load from an immediate 64-bit pointer into RAX. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 734 | void load_rax(void* ptr, RelocInfo::Mode rmode); |
| 735 | void load_rax(ExternalReference ext); |
| 736 | |
| 737 | // Conditional moves. |
| 738 | void cmovq(Condition cc, Register dst, Register src); |
| 739 | void cmovq(Condition cc, Register dst, const Operand& src); |
| 740 | void cmovl(Condition cc, Register dst, Register src); |
| 741 | void cmovl(Condition cc, Register dst, const Operand& src); |
| 742 | |
| 743 | // Exchange two registers |
| 744 | void xchg(Register dst, Register src); |
| 745 | |
| 746 | // Arithmetics |
| 747 | void addl(Register dst, Register src) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 748 | arithmetic_op_32(0x03, dst, src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | void addl(Register dst, Immediate src) { |
| 752 | immediate_arithmetic_op_32(0x0, dst, src); |
| 753 | } |
| 754 | |
| 755 | void addl(Register dst, const Operand& src) { |
| 756 | arithmetic_op_32(0x03, dst, src); |
| 757 | } |
| 758 | |
| 759 | void addl(const Operand& dst, Immediate src) { |
| 760 | immediate_arithmetic_op_32(0x0, dst, src); |
| 761 | } |
| 762 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 763 | void addl(const Operand& dst, Register src) { |
| 764 | arithmetic_op_32(0x01, src, dst); |
| 765 | } |
| 766 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 767 | void addq(Register dst, Register src) { |
| 768 | arithmetic_op(0x03, dst, src); |
| 769 | } |
| 770 | |
| 771 | void addq(Register dst, const Operand& src) { |
| 772 | arithmetic_op(0x03, dst, src); |
| 773 | } |
| 774 | |
| 775 | void addq(const Operand& dst, Register src) { |
| 776 | arithmetic_op(0x01, src, dst); |
| 777 | } |
| 778 | |
| 779 | void addq(Register dst, Immediate src) { |
| 780 | immediate_arithmetic_op(0x0, dst, src); |
| 781 | } |
| 782 | |
| 783 | void addq(const Operand& dst, Immediate src) { |
| 784 | immediate_arithmetic_op(0x0, dst, src); |
| 785 | } |
| 786 | |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 787 | void sbbl(Register dst, Register src) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 788 | arithmetic_op_32(0x1b, dst, src); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 789 | } |
| 790 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 791 | void sbbq(Register dst, Register src) { |
| 792 | arithmetic_op(0x1b, dst, src); |
| 793 | } |
| 794 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 795 | void cmpb(Register dst, Immediate src) { |
| 796 | immediate_arithmetic_op_8(0x7, dst, src); |
| 797 | } |
| 798 | |
| 799 | void cmpb_al(Immediate src); |
| 800 | |
| 801 | void cmpb(Register dst, Register src) { |
| 802 | arithmetic_op(0x3A, dst, src); |
| 803 | } |
| 804 | |
| 805 | void cmpb(Register dst, const Operand& src) { |
| 806 | arithmetic_op(0x3A, dst, src); |
| 807 | } |
| 808 | |
| 809 | void cmpb(const Operand& dst, Register src) { |
| 810 | arithmetic_op(0x38, src, dst); |
| 811 | } |
| 812 | |
| 813 | void cmpb(const Operand& dst, Immediate src) { |
| 814 | immediate_arithmetic_op_8(0x7, dst, src); |
| 815 | } |
| 816 | |
| 817 | void cmpw(const Operand& dst, Immediate src) { |
| 818 | immediate_arithmetic_op_16(0x7, dst, src); |
| 819 | } |
| 820 | |
| 821 | void cmpw(Register dst, Immediate src) { |
| 822 | immediate_arithmetic_op_16(0x7, dst, src); |
| 823 | } |
| 824 | |
| 825 | void cmpw(Register dst, const Operand& src) { |
| 826 | arithmetic_op_16(0x3B, dst, src); |
| 827 | } |
| 828 | |
| 829 | void cmpw(Register dst, Register src) { |
| 830 | arithmetic_op_16(0x3B, dst, src); |
| 831 | } |
| 832 | |
| 833 | void cmpw(const Operand& dst, Register src) { |
| 834 | arithmetic_op_16(0x39, src, dst); |
| 835 | } |
| 836 | |
| 837 | void cmpl(Register dst, Register src) { |
| 838 | arithmetic_op_32(0x3B, dst, src); |
| 839 | } |
| 840 | |
| 841 | void cmpl(Register dst, const Operand& src) { |
| 842 | arithmetic_op_32(0x3B, dst, src); |
| 843 | } |
| 844 | |
| 845 | void cmpl(const Operand& dst, Register src) { |
| 846 | arithmetic_op_32(0x39, src, dst); |
| 847 | } |
| 848 | |
| 849 | void cmpl(Register dst, Immediate src) { |
| 850 | immediate_arithmetic_op_32(0x7, dst, src); |
| 851 | } |
| 852 | |
| 853 | void cmpl(const Operand& dst, Immediate src) { |
| 854 | immediate_arithmetic_op_32(0x7, dst, src); |
| 855 | } |
| 856 | |
| 857 | void cmpq(Register dst, Register src) { |
| 858 | arithmetic_op(0x3B, dst, src); |
| 859 | } |
| 860 | |
| 861 | void cmpq(Register dst, const Operand& src) { |
| 862 | arithmetic_op(0x3B, dst, src); |
| 863 | } |
| 864 | |
| 865 | void cmpq(const Operand& dst, Register src) { |
| 866 | arithmetic_op(0x39, src, dst); |
| 867 | } |
| 868 | |
| 869 | void cmpq(Register dst, Immediate src) { |
| 870 | immediate_arithmetic_op(0x7, dst, src); |
| 871 | } |
| 872 | |
| 873 | void cmpq(const Operand& dst, Immediate src) { |
| 874 | immediate_arithmetic_op(0x7, dst, src); |
| 875 | } |
| 876 | |
| 877 | void and_(Register dst, Register src) { |
| 878 | arithmetic_op(0x23, dst, src); |
| 879 | } |
| 880 | |
| 881 | void and_(Register dst, const Operand& src) { |
| 882 | arithmetic_op(0x23, dst, src); |
| 883 | } |
| 884 | |
| 885 | void and_(const Operand& dst, Register src) { |
| 886 | arithmetic_op(0x21, src, dst); |
| 887 | } |
| 888 | |
| 889 | void and_(Register dst, Immediate src) { |
| 890 | immediate_arithmetic_op(0x4, dst, src); |
| 891 | } |
| 892 | |
| 893 | void and_(const Operand& dst, Immediate src) { |
| 894 | immediate_arithmetic_op(0x4, dst, src); |
| 895 | } |
| 896 | |
| 897 | void andl(Register dst, Immediate src) { |
| 898 | immediate_arithmetic_op_32(0x4, dst, src); |
| 899 | } |
| 900 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 901 | void andl(Register dst, Register src) { |
| 902 | arithmetic_op_32(0x23, dst, src); |
| 903 | } |
| 904 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 905 | void andl(Register dst, const Operand& src) { |
| 906 | arithmetic_op_32(0x23, dst, src); |
| 907 | } |
| 908 | |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 909 | void andb(Register dst, Immediate src) { |
| 910 | immediate_arithmetic_op_8(0x4, dst, src); |
| 911 | } |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 912 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 913 | void decq(Register dst); |
| 914 | void decq(const Operand& dst); |
| 915 | void decl(Register dst); |
| 916 | void decl(const Operand& dst); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 917 | void decb(Register dst); |
| 918 | void decb(const Operand& dst); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 919 | |
| 920 | // Sign-extends rax into rdx:rax. |
| 921 | void cqo(); |
| 922 | // Sign-extends eax into edx:eax. |
| 923 | void cdq(); |
| 924 | |
| 925 | // Divide rdx:rax by src. Quotient in rax, remainder in rdx. |
| 926 | void idivq(Register src); |
| 927 | // Divide edx:eax by lower 32 bits of src. Quotient in eax, rem. in edx. |
| 928 | void idivl(Register src); |
| 929 | |
| 930 | // Signed multiply instructions. |
| 931 | void imul(Register src); // rdx:rax = rax * src. |
| 932 | void imul(Register dst, Register src); // dst = dst * src. |
| 933 | void imul(Register dst, const Operand& src); // dst = dst * src. |
| 934 | void imul(Register dst, Register src, Immediate imm); // dst = src * imm. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 935 | // Signed 32-bit multiply instructions. |
| 936 | void imull(Register dst, Register src); // dst = dst * src. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 937 | void imull(Register dst, const Operand& src); // dst = dst * src. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 938 | void imull(Register dst, Register src, Immediate imm); // dst = src * imm. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 939 | |
| 940 | void incq(Register dst); |
| 941 | void incq(const Operand& dst); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 942 | void incl(Register dst); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 943 | void incl(const Operand& dst); |
| 944 | |
| 945 | void lea(Register dst, const Operand& src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 946 | void leal(Register dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 947 | |
| 948 | // Multiply rax by src, put the result in rdx:rax. |
| 949 | void mul(Register src); |
| 950 | |
| 951 | void neg(Register dst); |
| 952 | void neg(const Operand& dst); |
| 953 | void negl(Register dst); |
| 954 | |
| 955 | void not_(Register dst); |
| 956 | void not_(const Operand& dst); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 957 | void notl(Register dst); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 958 | |
| 959 | void or_(Register dst, Register src) { |
| 960 | arithmetic_op(0x0B, dst, src); |
| 961 | } |
| 962 | |
| 963 | void orl(Register dst, Register src) { |
| 964 | arithmetic_op_32(0x0B, dst, src); |
| 965 | } |
| 966 | |
| 967 | void or_(Register dst, const Operand& src) { |
| 968 | arithmetic_op(0x0B, dst, src); |
| 969 | } |
| 970 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 971 | void orl(Register dst, const Operand& src) { |
| 972 | arithmetic_op_32(0x0B, dst, src); |
| 973 | } |
| 974 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 975 | void or_(const Operand& dst, Register src) { |
| 976 | arithmetic_op(0x09, src, dst); |
| 977 | } |
| 978 | |
| 979 | void or_(Register dst, Immediate src) { |
| 980 | immediate_arithmetic_op(0x1, dst, src); |
| 981 | } |
| 982 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 983 | void orl(Register dst, Immediate src) { |
| 984 | immediate_arithmetic_op_32(0x1, dst, src); |
| 985 | } |
| 986 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 987 | void or_(const Operand& dst, Immediate src) { |
| 988 | immediate_arithmetic_op(0x1, dst, src); |
| 989 | } |
| 990 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 991 | void orl(const Operand& dst, Immediate src) { |
| 992 | immediate_arithmetic_op_32(0x1, dst, src); |
| 993 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 994 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 995 | |
| 996 | void rcl(Register dst, Immediate imm8) { |
| 997 | shift(dst, imm8, 0x2); |
| 998 | } |
| 999 | |
| 1000 | void rol(Register dst, Immediate imm8) { |
| 1001 | shift(dst, imm8, 0x0); |
| 1002 | } |
| 1003 | |
| 1004 | void rcr(Register dst, Immediate imm8) { |
| 1005 | shift(dst, imm8, 0x3); |
| 1006 | } |
| 1007 | |
| 1008 | void ror(Register dst, Immediate imm8) { |
| 1009 | shift(dst, imm8, 0x1); |
| 1010 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1011 | |
| 1012 | // Shifts dst:src left by cl bits, affecting only dst. |
| 1013 | void shld(Register dst, Register src); |
| 1014 | |
| 1015 | // Shifts src:dst right by cl bits, affecting only dst. |
| 1016 | void shrd(Register dst, Register src); |
| 1017 | |
| 1018 | // Shifts dst right, duplicating sign bit, by shift_amount bits. |
| 1019 | // Shifting by 1 is handled efficiently. |
| 1020 | void sar(Register dst, Immediate shift_amount) { |
| 1021 | shift(dst, shift_amount, 0x7); |
| 1022 | } |
| 1023 | |
| 1024 | // Shifts dst right, duplicating sign bit, by shift_amount bits. |
| 1025 | // Shifting by 1 is handled efficiently. |
| 1026 | void sarl(Register dst, Immediate shift_amount) { |
| 1027 | shift_32(dst, shift_amount, 0x7); |
| 1028 | } |
| 1029 | |
| 1030 | // Shifts dst right, duplicating sign bit, by cl % 64 bits. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1031 | void sar_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1032 | shift(dst, 0x7); |
| 1033 | } |
| 1034 | |
| 1035 | // Shifts dst right, duplicating sign bit, by cl % 64 bits. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1036 | void sarl_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1037 | shift_32(dst, 0x7); |
| 1038 | } |
| 1039 | |
| 1040 | void shl(Register dst, Immediate shift_amount) { |
| 1041 | shift(dst, shift_amount, 0x4); |
| 1042 | } |
| 1043 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1044 | void shl_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1045 | shift(dst, 0x4); |
| 1046 | } |
| 1047 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1048 | void shll_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1049 | shift_32(dst, 0x4); |
| 1050 | } |
| 1051 | |
| 1052 | void shll(Register dst, Immediate shift_amount) { |
| 1053 | shift_32(dst, shift_amount, 0x4); |
| 1054 | } |
| 1055 | |
| 1056 | void shr(Register dst, Immediate shift_amount) { |
| 1057 | shift(dst, shift_amount, 0x5); |
| 1058 | } |
| 1059 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1060 | void shr_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1061 | shift(dst, 0x5); |
| 1062 | } |
| 1063 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1064 | void shrl_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1065 | shift_32(dst, 0x5); |
| 1066 | } |
| 1067 | |
| 1068 | void shrl(Register dst, Immediate shift_amount) { |
| 1069 | shift_32(dst, shift_amount, 0x5); |
| 1070 | } |
| 1071 | |
| 1072 | void store_rax(void* dst, RelocInfo::Mode mode); |
| 1073 | void store_rax(ExternalReference ref); |
| 1074 | |
| 1075 | void subq(Register dst, Register src) { |
| 1076 | arithmetic_op(0x2B, dst, src); |
| 1077 | } |
| 1078 | |
| 1079 | void subq(Register dst, const Operand& src) { |
| 1080 | arithmetic_op(0x2B, dst, src); |
| 1081 | } |
| 1082 | |
| 1083 | void subq(const Operand& dst, Register src) { |
| 1084 | arithmetic_op(0x29, src, dst); |
| 1085 | } |
| 1086 | |
| 1087 | void subq(Register dst, Immediate src) { |
| 1088 | immediate_arithmetic_op(0x5, dst, src); |
| 1089 | } |
| 1090 | |
| 1091 | void subq(const Operand& dst, Immediate src) { |
| 1092 | immediate_arithmetic_op(0x5, dst, src); |
| 1093 | } |
| 1094 | |
| 1095 | void subl(Register dst, Register src) { |
| 1096 | arithmetic_op_32(0x2B, dst, src); |
| 1097 | } |
| 1098 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1099 | void subl(Register dst, const Operand& src) { |
| 1100 | arithmetic_op_32(0x2B, dst, src); |
| 1101 | } |
| 1102 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1103 | void subl(const Operand& dst, Immediate src) { |
| 1104 | immediate_arithmetic_op_32(0x5, dst, src); |
| 1105 | } |
| 1106 | |
| 1107 | void subl(Register dst, Immediate src) { |
| 1108 | immediate_arithmetic_op_32(0x5, dst, src); |
| 1109 | } |
| 1110 | |
| 1111 | void subb(Register dst, Immediate src) { |
| 1112 | immediate_arithmetic_op_8(0x5, dst, src); |
| 1113 | } |
| 1114 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1115 | void testb(Register dst, Register src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1116 | void testb(Register reg, Immediate mask); |
| 1117 | void testb(const Operand& op, Immediate mask); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1118 | void testb(const Operand& op, Register reg); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1119 | void testl(Register dst, Register src); |
| 1120 | void testl(Register reg, Immediate mask); |
| 1121 | void testl(const Operand& op, Immediate mask); |
| 1122 | void testq(const Operand& op, Register reg); |
| 1123 | void testq(Register dst, Register src); |
| 1124 | void testq(Register dst, Immediate mask); |
| 1125 | |
| 1126 | void xor_(Register dst, Register src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1127 | if (dst.code() == src.code()) { |
| 1128 | arithmetic_op_32(0x33, dst, src); |
| 1129 | } else { |
| 1130 | arithmetic_op(0x33, dst, src); |
| 1131 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1132 | } |
| 1133 | |
| 1134 | void xorl(Register dst, Register src) { |
| 1135 | arithmetic_op_32(0x33, dst, src); |
| 1136 | } |
| 1137 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1138 | void xorl(Register dst, const Operand& src) { |
| 1139 | arithmetic_op_32(0x33, dst, src); |
| 1140 | } |
| 1141 | |
| 1142 | void xorl(Register dst, Immediate src) { |
| 1143 | immediate_arithmetic_op_32(0x6, dst, src); |
| 1144 | } |
| 1145 | |
| 1146 | void xorl(const Operand& dst, Immediate src) { |
| 1147 | immediate_arithmetic_op_32(0x6, dst, src); |
| 1148 | } |
| 1149 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1150 | void xor_(Register dst, const Operand& src) { |
| 1151 | arithmetic_op(0x33, dst, src); |
| 1152 | } |
| 1153 | |
| 1154 | void xor_(const Operand& dst, Register src) { |
| 1155 | arithmetic_op(0x31, src, dst); |
| 1156 | } |
| 1157 | |
| 1158 | void xor_(Register dst, Immediate src) { |
| 1159 | immediate_arithmetic_op(0x6, dst, src); |
| 1160 | } |
| 1161 | |
| 1162 | void xor_(const Operand& dst, Immediate src) { |
| 1163 | immediate_arithmetic_op(0x6, dst, src); |
| 1164 | } |
| 1165 | |
| 1166 | // Bit operations. |
| 1167 | void bt(const Operand& dst, Register src); |
| 1168 | void bts(const Operand& dst, Register src); |
| 1169 | |
| 1170 | // Miscellaneous |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1171 | void clc(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1172 | void cld(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1173 | void cpuid(); |
| 1174 | void hlt(); |
| 1175 | void int3(); |
| 1176 | void nop(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1177 | void rdtsc(); |
| 1178 | void ret(int imm16); |
| 1179 | void setcc(Condition cc, Register reg); |
| 1180 | |
| 1181 | // Label operations & relative jumps (PPUM Appendix D) |
| 1182 | // |
| 1183 | // Takes a branch opcode (cc) and a label (L) and generates |
| 1184 | // either a backward branch or a forward branch and links it |
| 1185 | // to the label fixup chain. Usage: |
| 1186 | // |
| 1187 | // Label L; // unbound label |
| 1188 | // j(cc, &L); // forward branch to unbound label |
| 1189 | // bind(&L); // bind label to the current pc |
| 1190 | // j(cc, &L); // backward branch to bound label |
| 1191 | // bind(&L); // illegal: a label may be bound only once |
| 1192 | // |
| 1193 | // Note: The same Label can be used for forward and backward branches |
| 1194 | // but it may be bound only once. |
| 1195 | |
| 1196 | void bind(Label* L); // binds an unbound label L to the current code position |
| 1197 | |
| 1198 | // Calls |
| 1199 | // Call near relative 32-bit displacement, relative to next instruction. |
| 1200 | void call(Label* L); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1201 | void call(Handle<Code> target, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1202 | RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1203 | unsigned ast_id = kNoASTId); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1204 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1205 | // Calls directly to the given address using a relative offset. |
| 1206 | // Should only ever be used in Code objects for calls within the |
| 1207 | // same Code object. Should not be used when generating new code (use labels), |
| 1208 | // but only when patching existing code. |
| 1209 | void call(Address target); |
| 1210 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1211 | // Call near absolute indirect, address in register |
| 1212 | void call(Register adr); |
| 1213 | |
| 1214 | // Call near indirect |
| 1215 | void call(const Operand& operand); |
| 1216 | |
| 1217 | // Jumps |
| 1218 | // Jump short or near relative. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1219 | // Use a 32-bit signed displacement. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1220 | // Unconditional jump to L |
| 1221 | void jmp(Label* L, Label::Distance distance = Label::kFar); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1222 | void jmp(Handle<Code> target, RelocInfo::Mode rmode); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1223 | |
| 1224 | // Jump near absolute indirect (r64) |
| 1225 | void jmp(Register adr); |
| 1226 | |
| 1227 | // Jump near absolute indirect (m64) |
| 1228 | void jmp(const Operand& src); |
| 1229 | |
| 1230 | // Conditional jumps |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1231 | void j(Condition cc, |
| 1232 | Label* L, |
| 1233 | Label::Distance distance = Label::kFar); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1234 | void j(Condition cc, Handle<Code> target, RelocInfo::Mode rmode); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1235 | |
| 1236 | // Floating-point operations |
| 1237 | void fld(int i); |
| 1238 | |
| 1239 | void fld1(); |
| 1240 | void fldz(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1241 | void fldpi(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1242 | void fldln2(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1243 | |
| 1244 | void fld_s(const Operand& adr); |
| 1245 | void fld_d(const Operand& adr); |
| 1246 | |
| 1247 | void fstp_s(const Operand& adr); |
| 1248 | void fstp_d(const Operand& adr); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1249 | void fstp(int index); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1250 | |
| 1251 | void fild_s(const Operand& adr); |
| 1252 | void fild_d(const Operand& adr); |
| 1253 | |
| 1254 | void fist_s(const Operand& adr); |
| 1255 | |
| 1256 | void fistp_s(const Operand& adr); |
| 1257 | void fistp_d(const Operand& adr); |
| 1258 | |
| 1259 | void fisttp_s(const Operand& adr); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1260 | void fisttp_d(const Operand& adr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1261 | |
| 1262 | void fabs(); |
| 1263 | void fchs(); |
| 1264 | |
| 1265 | void fadd(int i); |
| 1266 | void fsub(int i); |
| 1267 | void fmul(int i); |
| 1268 | void fdiv(int i); |
| 1269 | |
| 1270 | void fisub_s(const Operand& adr); |
| 1271 | |
| 1272 | void faddp(int i = 1); |
| 1273 | void fsubp(int i = 1); |
| 1274 | void fsubrp(int i = 1); |
| 1275 | void fmulp(int i = 1); |
| 1276 | void fdivp(int i = 1); |
| 1277 | void fprem(); |
| 1278 | void fprem1(); |
| 1279 | |
| 1280 | void fxch(int i = 1); |
| 1281 | void fincstp(); |
| 1282 | void ffree(int i = 0); |
| 1283 | |
| 1284 | void ftst(); |
| 1285 | void fucomp(int i); |
| 1286 | void fucompp(); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1287 | void fucomi(int i); |
| 1288 | void fucomip(); |
| 1289 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1290 | void fcompp(); |
| 1291 | void fnstsw_ax(); |
| 1292 | void fwait(); |
| 1293 | void fnclex(); |
| 1294 | |
| 1295 | void fsin(); |
| 1296 | void fcos(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1297 | void fptan(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1298 | void fyl2x(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1299 | void f2xm1(); |
| 1300 | void fscale(); |
| 1301 | void fninit(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1302 | |
| 1303 | void frndint(); |
| 1304 | |
| 1305 | void sahf(); |
| 1306 | |
| 1307 | // SSE2 instructions |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1308 | void movd(XMMRegister dst, Register src); |
| 1309 | void movd(Register dst, XMMRegister src); |
| 1310 | void movq(XMMRegister dst, Register src); |
| 1311 | void movq(Register dst, XMMRegister src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1312 | void movq(XMMRegister dst, XMMRegister src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1313 | void extractps(Register dst, XMMRegister src, byte imm8); |
| 1314 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1315 | // Don't use this unless it's important to keep the |
| 1316 | // top half of the destination register unchanged. |
| 1317 | // Used movaps when moving double values and movq for integer |
| 1318 | // values in xmm registers. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1319 | void movsd(XMMRegister dst, XMMRegister src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1320 | |
| 1321 | void movsd(const Operand& dst, XMMRegister src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1322 | void movsd(XMMRegister dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1323 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1324 | void movdqa(const Operand& dst, XMMRegister src); |
| 1325 | void movdqa(XMMRegister dst, const Operand& src); |
| 1326 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1327 | void movapd(XMMRegister dst, XMMRegister src); |
| 1328 | void movaps(XMMRegister dst, XMMRegister src); |
| 1329 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1330 | void movss(XMMRegister dst, const Operand& src); |
| 1331 | void movss(const Operand& dst, XMMRegister src); |
| 1332 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1333 | void cvttss2si(Register dst, const Operand& src); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1334 | void cvttss2si(Register dst, XMMRegister src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1335 | void cvttsd2si(Register dst, const Operand& src); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1336 | void cvttsd2si(Register dst, XMMRegister src); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 1337 | void cvttsd2siq(Register dst, XMMRegister src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1338 | |
| 1339 | void cvtlsi2sd(XMMRegister dst, const Operand& src); |
| 1340 | void cvtlsi2sd(XMMRegister dst, Register src); |
| 1341 | void cvtqsi2sd(XMMRegister dst, const Operand& src); |
| 1342 | void cvtqsi2sd(XMMRegister dst, Register src); |
| 1343 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1344 | void cvtlsi2ss(XMMRegister dst, Register src); |
| 1345 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1346 | void cvtss2sd(XMMRegister dst, XMMRegister src); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1347 | void cvtss2sd(XMMRegister dst, const Operand& src); |
| 1348 | void cvtsd2ss(XMMRegister dst, XMMRegister src); |
| 1349 | |
| 1350 | void cvtsd2si(Register dst, XMMRegister src); |
| 1351 | void cvtsd2siq(Register dst, XMMRegister src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1352 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1353 | void addsd(XMMRegister dst, XMMRegister src); |
| 1354 | void subsd(XMMRegister dst, XMMRegister src); |
| 1355 | void mulsd(XMMRegister dst, XMMRegister src); |
| 1356 | void divsd(XMMRegister dst, XMMRegister src); |
| 1357 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1358 | void andpd(XMMRegister dst, XMMRegister src); |
| 1359 | void orpd(XMMRegister dst, XMMRegister src); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1360 | void xorpd(XMMRegister dst, XMMRegister src); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1361 | void xorps(XMMRegister dst, XMMRegister src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1362 | void sqrtsd(XMMRegister dst, XMMRegister src); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1363 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1364 | void ucomisd(XMMRegister dst, XMMRegister src); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1365 | void ucomisd(XMMRegister dst, const Operand& src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1366 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1367 | enum RoundingMode { |
| 1368 | kRoundToNearest = 0x0, |
| 1369 | kRoundDown = 0x1, |
| 1370 | kRoundUp = 0x2, |
| 1371 | kRoundToZero = 0x3 |
| 1372 | }; |
| 1373 | |
| 1374 | void roundsd(XMMRegister dst, XMMRegister src, RoundingMode mode); |
| 1375 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1376 | void movmskpd(Register dst, XMMRegister src); |
| 1377 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1378 | // The first argument is the reg field, the second argument is the r/m field. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1379 | void emit_sse_operand(XMMRegister dst, XMMRegister src); |
| 1380 | void emit_sse_operand(XMMRegister reg, const Operand& adr); |
| 1381 | void emit_sse_operand(XMMRegister dst, Register src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1382 | void emit_sse_operand(Register dst, XMMRegister src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1383 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1384 | // Debugging |
| 1385 | void Print(); |
| 1386 | |
| 1387 | // Check the code size generated from label to here. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1388 | int SizeOfCodeGeneratedSince(Label* label) { |
| 1389 | return pc_offset() - label->pos(); |
| 1390 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1391 | |
| 1392 | // Mark address of the ExitJSFrame code. |
| 1393 | void RecordJSReturn(); |
| 1394 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1395 | // Mark address of a debug break slot. |
| 1396 | void RecordDebugBreakSlot(); |
| 1397 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1398 | // Record a comment relocation entry that can be used by a disassembler. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1399 | // Use --code-comments to enable. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1400 | void RecordComment(const char* msg, bool force = false); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1401 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1402 | // Writes a single word of data in the code stream. |
| 1403 | // Used for inline tables, e.g., jump-tables. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1404 | void db(uint8_t data); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1405 | void dd(uint32_t data); |
| 1406 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1407 | int pc_offset() const { return static_cast<int>(pc_ - buffer_); } |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 1408 | |
| 1409 | PositionsRecorder* positions_recorder() { return &positions_recorder_; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1410 | |
| 1411 | // Check if there is less than kGap bytes available in the buffer. |
| 1412 | // If this is the case, we need to grow the buffer before emitting |
| 1413 | // an instruction or relocation information. |
| 1414 | inline bool buffer_overflow() const { |
| 1415 | return pc_ >= reloc_info_writer.pos() - kGap; |
| 1416 | } |
| 1417 | |
| 1418 | // Get the number of bytes available in the buffer. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1419 | inline int available_space() const { |
| 1420 | return static_cast<int>(reloc_info_writer.pos() - pc_); |
| 1421 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1422 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1423 | static bool IsNop(Address addr); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1424 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1425 | // Avoid overflows for displacements etc. |
| 1426 | static const int kMaximalBufferSize = 512*MB; |
| 1427 | static const int kMinimalBufferSize = 4*KB; |
| 1428 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1429 | byte byte_at(int pos) { return buffer_[pos]; } |
| 1430 | void set_byte_at(int pos, byte value) { buffer_[pos] = value; } |
| 1431 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1432 | protected: |
| 1433 | bool emit_debug_code() const { return emit_debug_code_; } |
| 1434 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1435 | private: |
| 1436 | byte* addr_at(int pos) { return buffer_ + pos; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1437 | uint32_t long_at(int pos) { |
| 1438 | return *reinterpret_cast<uint32_t*>(addr_at(pos)); |
| 1439 | } |
| 1440 | void long_at_put(int pos, uint32_t x) { |
| 1441 | *reinterpret_cast<uint32_t*>(addr_at(pos)) = x; |
| 1442 | } |
| 1443 | |
| 1444 | // code emission |
| 1445 | void GrowBuffer(); |
| 1446 | |
| 1447 | void emit(byte x) { *pc_++ = x; } |
| 1448 | inline void emitl(uint32_t x); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1449 | inline void emitq(uint64_t x, RelocInfo::Mode rmode); |
| 1450 | inline void emitw(uint16_t x); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1451 | inline void emit_code_target(Handle<Code> target, |
| 1452 | RelocInfo::Mode rmode, |
| 1453 | unsigned ast_id = kNoASTId); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1454 | void emit(Immediate x) { emitl(x.value_); } |
| 1455 | |
| 1456 | // Emits a REX prefix that encodes a 64-bit operand size and |
| 1457 | // the top bit of both register codes. |
| 1458 | // High bit of reg goes to REX.R, high bit of rm_reg goes to REX.B. |
| 1459 | // REX.W is set. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1460 | inline void emit_rex_64(XMMRegister reg, Register rm_reg); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1461 | inline void emit_rex_64(Register reg, XMMRegister rm_reg); |
| 1462 | inline void emit_rex_64(Register reg, Register rm_reg); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1463 | |
| 1464 | // Emits a REX prefix that encodes a 64-bit operand size and |
| 1465 | // the top bit of the destination, index, and base register codes. |
| 1466 | // The high bit of reg is used for REX.R, the high bit of op's base |
| 1467 | // register is used for REX.B, and the high bit of op's index register |
| 1468 | // is used for REX.X. REX.W is set. |
| 1469 | inline void emit_rex_64(Register reg, const Operand& op); |
| 1470 | inline void emit_rex_64(XMMRegister reg, const Operand& op); |
| 1471 | |
| 1472 | // Emits a REX prefix that encodes a 64-bit operand size and |
| 1473 | // the top bit of the register code. |
| 1474 | // The high bit of register is used for REX.B. |
| 1475 | // REX.W is set and REX.R and REX.X are clear. |
| 1476 | inline void emit_rex_64(Register rm_reg); |
| 1477 | |
| 1478 | // Emits a REX prefix that encodes a 64-bit operand size and |
| 1479 | // the top bit of the index and base register codes. |
| 1480 | // The high bit of op's base register is used for REX.B, and the high |
| 1481 | // bit of op's index register is used for REX.X. |
| 1482 | // REX.W is set and REX.R clear. |
| 1483 | inline void emit_rex_64(const Operand& op); |
| 1484 | |
| 1485 | // Emit a REX prefix that only sets REX.W to choose a 64-bit operand size. |
| 1486 | void emit_rex_64() { emit(0x48); } |
| 1487 | |
| 1488 | // High bit of reg goes to REX.R, high bit of rm_reg goes to REX.B. |
| 1489 | // REX.W is clear. |
| 1490 | inline void emit_rex_32(Register reg, Register rm_reg); |
| 1491 | |
| 1492 | // The high bit of reg is used for REX.R, the high bit of op's base |
| 1493 | // register is used for REX.B, and the high bit of op's index register |
| 1494 | // is used for REX.X. REX.W is cleared. |
| 1495 | inline void emit_rex_32(Register reg, const Operand& op); |
| 1496 | |
| 1497 | // High bit of rm_reg goes to REX.B. |
| 1498 | // REX.W, REX.R and REX.X are clear. |
| 1499 | inline void emit_rex_32(Register rm_reg); |
| 1500 | |
| 1501 | // High bit of base goes to REX.B and high bit of index to REX.X. |
| 1502 | // REX.W and REX.R are clear. |
| 1503 | inline void emit_rex_32(const Operand& op); |
| 1504 | |
| 1505 | // High bit of reg goes to REX.R, high bit of rm_reg goes to REX.B. |
| 1506 | // REX.W is cleared. If no REX bits are set, no byte is emitted. |
| 1507 | inline void emit_optional_rex_32(Register reg, Register rm_reg); |
| 1508 | |
| 1509 | // The high bit of reg is used for REX.R, the high bit of op's base |
| 1510 | // register is used for REX.B, and the high bit of op's index register |
| 1511 | // is used for REX.X. REX.W is cleared. If no REX bits are set, nothing |
| 1512 | // is emitted. |
| 1513 | inline void emit_optional_rex_32(Register reg, const Operand& op); |
| 1514 | |
| 1515 | // As for emit_optional_rex_32(Register, Register), except that |
| 1516 | // the registers are XMM registers. |
| 1517 | inline void emit_optional_rex_32(XMMRegister reg, XMMRegister base); |
| 1518 | |
| 1519 | // As for emit_optional_rex_32(Register, Register), except that |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1520 | // one of the registers is an XMM registers. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1521 | inline void emit_optional_rex_32(XMMRegister reg, Register base); |
| 1522 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1523 | // As for emit_optional_rex_32(Register, Register), except that |
| 1524 | // one of the registers is an XMM registers. |
| 1525 | inline void emit_optional_rex_32(Register reg, XMMRegister base); |
| 1526 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1527 | // As for emit_optional_rex_32(Register, const Operand&), except that |
| 1528 | // the register is an XMM register. |
| 1529 | inline void emit_optional_rex_32(XMMRegister reg, const Operand& op); |
| 1530 | |
| 1531 | // Optionally do as emit_rex_32(Register) if the register number has |
| 1532 | // the high bit set. |
| 1533 | inline void emit_optional_rex_32(Register rm_reg); |
| 1534 | |
| 1535 | // Optionally do as emit_rex_32(const Operand&) if the operand register |
| 1536 | // numbers have a high bit set. |
| 1537 | inline void emit_optional_rex_32(const Operand& op); |
| 1538 | |
| 1539 | |
| 1540 | // Emit the ModR/M byte, and optionally the SIB byte and |
| 1541 | // 1- or 4-byte offset for a memory operand. Also encodes |
| 1542 | // the second operand of the operation, a register or operation |
| 1543 | // subcode, into the reg field of the ModR/M byte. |
| 1544 | void emit_operand(Register reg, const Operand& adr) { |
| 1545 | emit_operand(reg.low_bits(), adr); |
| 1546 | } |
| 1547 | |
| 1548 | // Emit the ModR/M byte, and optionally the SIB byte and |
| 1549 | // 1- or 4-byte offset for a memory operand. Also used to encode |
| 1550 | // a three-bit opcode extension into the ModR/M byte. |
| 1551 | void emit_operand(int rm, const Operand& adr); |
| 1552 | |
| 1553 | // Emit a ModR/M byte with registers coded in the reg and rm_reg fields. |
| 1554 | void emit_modrm(Register reg, Register rm_reg) { |
| 1555 | emit(0xC0 | reg.low_bits() << 3 | rm_reg.low_bits()); |
| 1556 | } |
| 1557 | |
| 1558 | // Emit a ModR/M byte with an operation subcode in the reg field and |
| 1559 | // a register in the rm_reg field. |
| 1560 | void emit_modrm(int code, Register rm_reg) { |
| 1561 | ASSERT(is_uint3(code)); |
| 1562 | emit(0xC0 | code << 3 | rm_reg.low_bits()); |
| 1563 | } |
| 1564 | |
| 1565 | // Emit the code-object-relative offset of the label's position |
| 1566 | inline void emit_code_relative_offset(Label* label); |
| 1567 | |
| 1568 | // Emit machine code for one of the operations ADD, ADC, SUB, SBC, |
| 1569 | // AND, OR, XOR, or CMP. The encodings of these operations are all |
| 1570 | // similar, differing just in the opcode or in the reg field of the |
| 1571 | // ModR/M byte. |
| 1572 | void arithmetic_op_16(byte opcode, Register reg, Register rm_reg); |
| 1573 | void arithmetic_op_16(byte opcode, Register reg, const Operand& rm_reg); |
| 1574 | void arithmetic_op_32(byte opcode, Register reg, Register rm_reg); |
| 1575 | void arithmetic_op_32(byte opcode, Register reg, const Operand& rm_reg); |
| 1576 | void arithmetic_op(byte opcode, Register reg, Register rm_reg); |
| 1577 | void arithmetic_op(byte opcode, Register reg, const Operand& rm_reg); |
| 1578 | void immediate_arithmetic_op(byte subcode, Register dst, Immediate src); |
| 1579 | void immediate_arithmetic_op(byte subcode, const Operand& dst, Immediate src); |
| 1580 | // Operate on a byte in memory or register. |
| 1581 | void immediate_arithmetic_op_8(byte subcode, |
| 1582 | Register dst, |
| 1583 | Immediate src); |
| 1584 | void immediate_arithmetic_op_8(byte subcode, |
| 1585 | const Operand& dst, |
| 1586 | Immediate src); |
| 1587 | // Operate on a word in memory or register. |
| 1588 | void immediate_arithmetic_op_16(byte subcode, |
| 1589 | Register dst, |
| 1590 | Immediate src); |
| 1591 | void immediate_arithmetic_op_16(byte subcode, |
| 1592 | const Operand& dst, |
| 1593 | Immediate src); |
| 1594 | // Operate on a 32-bit word in memory or register. |
| 1595 | void immediate_arithmetic_op_32(byte subcode, |
| 1596 | Register dst, |
| 1597 | Immediate src); |
| 1598 | void immediate_arithmetic_op_32(byte subcode, |
| 1599 | const Operand& dst, |
| 1600 | Immediate src); |
| 1601 | |
| 1602 | // Emit machine code for a shift operation. |
| 1603 | void shift(Register dst, Immediate shift_amount, int subcode); |
| 1604 | void shift_32(Register dst, Immediate shift_amount, int subcode); |
| 1605 | // Shift dst by cl % 64 bits. |
| 1606 | void shift(Register dst, int subcode); |
| 1607 | void shift_32(Register dst, int subcode); |
| 1608 | |
| 1609 | void emit_farith(int b1, int b2, int i); |
| 1610 | |
| 1611 | // labels |
| 1612 | // void print(Label* L); |
| 1613 | void bind_to(Label* L, int pos); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1614 | |
| 1615 | // record reloc info for current pc_ |
| 1616 | void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0); |
| 1617 | |
| 1618 | friend class CodePatcher; |
| 1619 | friend class EnsureSpace; |
| 1620 | friend class RegExpMacroAssemblerX64; |
| 1621 | |
| 1622 | // Code buffer: |
| 1623 | // The buffer into which code and relocation info are generated. |
| 1624 | byte* buffer_; |
| 1625 | int buffer_size_; |
| 1626 | // True if the assembler owns the buffer, false if buffer is external. |
| 1627 | bool own_buffer_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1628 | |
| 1629 | // code generation |
| 1630 | byte* pc_; // the program counter; moves forward |
| 1631 | RelocInfoWriter reloc_info_writer; |
| 1632 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1633 | List< Handle<Code> > code_targets_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1634 | |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 1635 | PositionsRecorder positions_recorder_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1636 | |
| 1637 | bool emit_debug_code_; |
| 1638 | |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 1639 | friend class PositionsRecorder; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1640 | }; |
| 1641 | |
| 1642 | |
| 1643 | // Helper class that ensures that there is enough space for generating |
| 1644 | // instructions and relocation information. The constructor makes |
| 1645 | // sure that there is enough space and (in debug mode) the destructor |
| 1646 | // checks that we did not generate too much. |
| 1647 | class EnsureSpace BASE_EMBEDDED { |
| 1648 | public: |
| 1649 | explicit EnsureSpace(Assembler* assembler) : assembler_(assembler) { |
| 1650 | if (assembler_->buffer_overflow()) assembler_->GrowBuffer(); |
| 1651 | #ifdef DEBUG |
| 1652 | space_before_ = assembler_->available_space(); |
| 1653 | #endif |
| 1654 | } |
| 1655 | |
| 1656 | #ifdef DEBUG |
| 1657 | ~EnsureSpace() { |
| 1658 | int bytes_generated = space_before_ - assembler_->available_space(); |
| 1659 | ASSERT(bytes_generated < assembler_->kGap); |
| 1660 | } |
| 1661 | #endif |
| 1662 | |
| 1663 | private: |
| 1664 | Assembler* assembler_; |
| 1665 | #ifdef DEBUG |
| 1666 | int space_before_; |
| 1667 | #endif |
| 1668 | }; |
| 1669 | |
| 1670 | } } // namespace v8::internal |
| 1671 | |
| 1672 | #endif // V8_X64_ASSEMBLER_X64_H_ |