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Side by Side Diff: src/utils.h

Issue 2356703003: Revert of [d8] Fix the shared-library build (Closed)
Patch Set: Created 4 years, 3 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_UTILS_H_ 5 #ifndef V8_UTILS_H_
6 #define V8_UTILS_H_ 6 #define V8_UTILS_H_
7 7
8 #include <limits.h> 8 #include <limits.h>
9 #include <stdlib.h> 9 #include <stdlib.h>
10 #include <string.h> 10 #include <string.h>
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430 430
431 // Initializes the codegen support that depends on CPU features. 431 // Initializes the codegen support that depends on CPU features.
432 void init_memcopy_functions(Isolate* isolate); 432 void init_memcopy_functions(Isolate* isolate);
433 433
434 #if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X87) 434 #if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X87)
435 // Limit below which the extra overhead of the MemCopy function is likely 435 // Limit below which the extra overhead of the MemCopy function is likely
436 // to outweigh the benefits of faster copying. 436 // to outweigh the benefits of faster copying.
437 const int kMinComplexMemCopy = 64; 437 const int kMinComplexMemCopy = 64;
438 438
439 // Copy memory area. No restrictions. 439 // Copy memory area. No restrictions.
440 V8_EXPORT_PRIVATE void MemMove(void* dest, const void* src, size_t size); 440 void MemMove(void* dest, const void* src, size_t size);
441 typedef void (*MemMoveFunction)(void* dest, const void* src, size_t size); 441 typedef void (*MemMoveFunction)(void* dest, const void* src, size_t size);
442 442
443 // Keep the distinction of "move" vs. "copy" for the benefit of other 443 // Keep the distinction of "move" vs. "copy" for the benefit of other
444 // architectures. 444 // architectures.
445 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) { 445 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
446 MemMove(dest, src, size); 446 MemMove(dest, src, size);
447 } 447 }
448 #elif defined(V8_HOST_ARCH_ARM) 448 #elif defined(V8_HOST_ARCH_ARM)
449 typedef void (*MemCopyUint8Function)(uint8_t* dest, const uint8_t* src, 449 typedef void (*MemCopyUint8Function)(uint8_t* dest, const uint8_t* src,
450 size_t size); 450 size_t size);
451 extern MemCopyUint8Function memcopy_uint8_function; 451 extern MemCopyUint8Function memcopy_uint8_function;
452 V8_INLINE void MemCopyUint8Wrapper(uint8_t* dest, const uint8_t* src, 452 V8_INLINE void MemCopyUint8Wrapper(uint8_t* dest, const uint8_t* src,
453 size_t chars) { 453 size_t chars) {
454 memcpy(dest, src, chars); 454 memcpy(dest, src, chars);
455 } 455 }
456 // For values < 16, the assembler function is slower than the inlined C code. 456 // For values < 16, the assembler function is slower than the inlined C code.
457 const int kMinComplexMemCopy = 16; 457 const int kMinComplexMemCopy = 16;
458 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) { 458 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
459 (*memcopy_uint8_function)(reinterpret_cast<uint8_t*>(dest), 459 (*memcopy_uint8_function)(reinterpret_cast<uint8_t*>(dest),
460 reinterpret_cast<const uint8_t*>(src), size); 460 reinterpret_cast<const uint8_t*>(src), size);
461 } 461 }
462 V8_EXPORT_PRIVATE V8_INLINE void MemMove(void* dest, const void* src, 462 V8_INLINE void MemMove(void* dest, const void* src, size_t size) {
463 size_t size) {
464 memmove(dest, src, size); 463 memmove(dest, src, size);
465 } 464 }
466 465
467 typedef void (*MemCopyUint16Uint8Function)(uint16_t* dest, const uint8_t* src, 466 typedef void (*MemCopyUint16Uint8Function)(uint16_t* dest, const uint8_t* src,
468 size_t size); 467 size_t size);
469 extern MemCopyUint16Uint8Function memcopy_uint16_uint8_function; 468 extern MemCopyUint16Uint8Function memcopy_uint16_uint8_function;
470 void MemCopyUint16Uint8Wrapper(uint16_t* dest, const uint8_t* src, 469 void MemCopyUint16Uint8Wrapper(uint16_t* dest, const uint8_t* src,
471 size_t chars); 470 size_t chars);
472 // For values < 12, the assembler function is slower than the inlined C code. 471 // For values < 12, the assembler function is slower than the inlined C code.
473 const int kMinComplexConvertMemCopy = 12; 472 const int kMinComplexConvertMemCopy = 12;
474 V8_INLINE void MemCopyUint16Uint8(uint16_t* dest, const uint8_t* src, 473 V8_INLINE void MemCopyUint16Uint8(uint16_t* dest, const uint8_t* src,
475 size_t size) { 474 size_t size) {
476 (*memcopy_uint16_uint8_function)(dest, src, size); 475 (*memcopy_uint16_uint8_function)(dest, src, size);
477 } 476 }
478 #elif defined(V8_HOST_ARCH_MIPS) 477 #elif defined(V8_HOST_ARCH_MIPS)
479 typedef void (*MemCopyUint8Function)(uint8_t* dest, const uint8_t* src, 478 typedef void (*MemCopyUint8Function)(uint8_t* dest, const uint8_t* src,
480 size_t size); 479 size_t size);
481 extern MemCopyUint8Function memcopy_uint8_function; 480 extern MemCopyUint8Function memcopy_uint8_function;
482 V8_INLINE void MemCopyUint8Wrapper(uint8_t* dest, const uint8_t* src, 481 V8_INLINE void MemCopyUint8Wrapper(uint8_t* dest, const uint8_t* src,
483 size_t chars) { 482 size_t chars) {
484 memcpy(dest, src, chars); 483 memcpy(dest, src, chars);
485 } 484 }
486 // For values < 16, the assembler function is slower than the inlined C code. 485 // For values < 16, the assembler function is slower than the inlined C code.
487 const int kMinComplexMemCopy = 16; 486 const int kMinComplexMemCopy = 16;
488 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) { 487 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
489 (*memcopy_uint8_function)(reinterpret_cast<uint8_t*>(dest), 488 (*memcopy_uint8_function)(reinterpret_cast<uint8_t*>(dest),
490 reinterpret_cast<const uint8_t*>(src), size); 489 reinterpret_cast<const uint8_t*>(src), size);
491 } 490 }
492 V8_EXPORT_PRIVATE V8_INLINE void MemMove(void* dest, const void* src, 491 V8_INLINE void MemMove(void* dest, const void* src, size_t size) {
493 size_t size) {
494 memmove(dest, src, size); 492 memmove(dest, src, size);
495 } 493 }
496 #else 494 #else
497 // Copy memory area to disjoint memory area. 495 // Copy memory area to disjoint memory area.
498 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) { 496 V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
499 memcpy(dest, src, size); 497 memcpy(dest, src, size);
500 } 498 }
501 V8_EXPORT_PRIVATE V8_INLINE void MemMove(void* dest, const void* src, 499 V8_INLINE void MemMove(void* dest, const void* src, size_t size) {
502 size_t size) {
503 memmove(dest, src, size); 500 memmove(dest, src, size);
504 } 501 }
505 const int kMinComplexMemCopy = 16 * kPointerSize; 502 const int kMinComplexMemCopy = 16 * kPointerSize;
506 #endif // V8_TARGET_ARCH_IA32 503 #endif // V8_TARGET_ARCH_IA32
507 504
508 505
509 // ---------------------------------------------------------------------------- 506 // ----------------------------------------------------------------------------
510 // Miscellaneous 507 // Miscellaneous
511 508
512 // A static resource holds a static instance that can be reserved in 509 // A static resource holds a static instance that can be reserved in
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1594 byte* dst = reinterpret_cast<byte*>(p); 1591 byte* dst = reinterpret_cast<byte*>(p);
1595 for (size_t i = 0; i < sizeof(V); i++) { 1592 for (size_t i = 0; i < sizeof(V); i++) {
1596 dst[i] = src[sizeof(V) - i - 1]; 1593 dst[i] = src[sizeof(V) - i - 1];
1597 } 1594 }
1598 #endif // V8_TARGET_LITTLE_ENDIAN 1595 #endif // V8_TARGET_LITTLE_ENDIAN
1599 } 1596 }
1600 } // namespace internal 1597 } // namespace internal
1601 } // namespace v8 1598 } // namespace v8
1602 1599
1603 #endif // V8_UTILS_H_ 1600 #endif // V8_UTILS_H_
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