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| 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 
| 2 // All Rights Reserved. | 2 // All Rights Reserved. | 
| 3 // | 3 // | 
| 4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without | 
| 5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are | 
| 6 // met: | 6 // met: | 
| 7 // | 7 // | 
| 8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, | 
| 9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. | 
| 10 // | 10 // | 
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| 37 #ifndef V8_X64_ASSEMBLER_X64_H_ | 37 #ifndef V8_X64_ASSEMBLER_X64_H_ | 
| 38 #define V8_X64_ASSEMBLER_X64_H_ | 38 #define V8_X64_ASSEMBLER_X64_H_ | 
| 39 | 39 | 
| 40 #include "serialize.h" | 40 #include "serialize.h" | 
| 41 | 41 | 
| 42 namespace v8 { | 42 namespace v8 { | 
| 43 namespace internal { | 43 namespace internal { | 
| 44 | 44 | 
| 45 // Utility functions | 45 // Utility functions | 
| 46 | 46 | 
| 47 // Test whether a 64-bit value is in a specific range. |  | 
| 48 inline bool is_uint32(int64_t x) { |  | 
| 49   static const uint64_t kMaxUInt32 = V8_UINT64_C(0xffffffff); |  | 
| 50   return static_cast<uint64_t>(x) <= kMaxUInt32; |  | 
| 51 } |  | 
| 52 |  | 
| 53 inline bool is_int32(int64_t x) { |  | 
| 54   static const int64_t kMinInt32 = -V8_INT64_C(0x80000000); |  | 
| 55   return is_uint32(x - kMinInt32); |  | 
| 56 } |  | 
| 57 |  | 
| 58 inline bool uint_is_int32(uint64_t x) { |  | 
| 59   static const uint64_t kMaxInt32 = V8_UINT64_C(0x7fffffff); |  | 
| 60   return x <= kMaxInt32; |  | 
| 61 } |  | 
| 62 |  | 
| 63 inline bool is_uint32(uint64_t x) { |  | 
| 64   static const uint64_t kMaxUInt32 = V8_UINT64_C(0xffffffff); |  | 
| 65   return x <= kMaxUInt32; |  | 
| 66 } |  | 
| 67 |  | 
| 68 // CPU Registers. | 47 // CPU Registers. | 
| 69 // | 48 // | 
| 70 // 1) We would prefer to use an enum, but enum values are assignment- | 49 // 1) We would prefer to use an enum, but enum values are assignment- | 
| 71 // compatible with int, which has caused code-generation bugs. | 50 // compatible with int, which has caused code-generation bugs. | 
| 72 // | 51 // | 
| 73 // 2) We would prefer to use a class instead of a struct but we don't like | 52 // 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 | 53 // the register initialization to depend on the particular initialization | 
| 75 // order (which appears to be different on OS X, Linux, and Windows for the | 54 // 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 | 55 // installed versions of C++ we tried). Using a struct permits C-style | 
| 77 // "initialization". Also, the Register objects cannot be const as this | 56 // "initialization". Also, the Register objects cannot be const as this | 
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| 1753  private: | 1732  private: | 
| 1754   Assembler* assembler_; | 1733   Assembler* assembler_; | 
| 1755 #ifdef DEBUG | 1734 #ifdef DEBUG | 
| 1756   int space_before_; | 1735   int space_before_; | 
| 1757 #endif | 1736 #endif | 
| 1758 }; | 1737 }; | 
| 1759 | 1738 | 
| 1760 } }  // namespace v8::internal | 1739 } }  // namespace v8::internal | 
| 1761 | 1740 | 
| 1762 #endif  // V8_X64_ASSEMBLER_X64_H_ | 1741 #endif  // V8_X64_ASSEMBLER_X64_H_ | 
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