byteswap.hh (2772:f0f52cbe744d) byteswap.hh (2777:599e7940aba5)
1/*
2 * Copyright (c) 2004 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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86#if defined(linux)
87 return bswap_16(x);
88#else
89 return (uint16_t)(((uint16_t)(x) & 0xff) << 8 |
90 ((uint16_t)(x) & 0xff00) >> 8);
91#endif
92}
93
1/*
2 * Copyright (c) 2004 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

--- 77 unchanged lines hidden (view full) ---

86#if defined(linux)
87 return bswap_16(x);
88#else
89 return (uint16_t)(((uint16_t)(x) & 0xff) << 8 |
90 ((uint16_t)(x) & 0xff00) >> 8);
91#endif
92}
93
94//This lets the compiler figure out how to call the swap_byte functions above
95//for different data types.
96static inline uint64_t swap_byte(uint64_t x) {return swap_byte64(x);}
97static inline int64_t swap_byte(int64_t x) {return swap_byte64((uint64_t)x);}
98static inline uint32_t swap_byte(uint32_t x) {return swap_byte32(x);}
99static inline int32_t swap_byte(int32_t x) {return swap_byte32((uint32_t)x);}
100//This is to prevent the following two functions from compiling on
101//64bit machines. It won't detect everything, so it should be changed.
102#ifndef __x86_64__
103static inline long swap_byte(long x) {return swap_byte32((long)x);}
104static inline unsigned long swap_byte(unsigned long x)
105 { return swap_byte32((unsigned long)x);}
106#endif
107static inline uint16_t swap_byte(uint16_t x) {return swap_byte32(x);}
108static inline int16_t swap_byte(int16_t x) {return swap_byte16((uint16_t)x);}
109static inline uint8_t swap_byte(uint8_t x) {return x;}
110static inline int8_t swap_byte(int8_t x) {return x;}
111static inline double swap_byte(double x) {return swap_byte64((uint64_t)x);}
112static inline float swap_byte(float x) {return swap_byte32((uint32_t)x);}
94// This function lets the compiler figure out how to call the
95// swap_byte functions above for different data types. Since the
96// sizeof() values are known at compiel time, it should inline to a
97// direct call to the right swap_byteNN() function.
98template <typename T>
99static inline T swap_byte(T x) {
100 if (sizeof(T) == 8)
101 return swap_byte64((uint64_t)x);
102 else if (sizeof(T) == 4)
103 return swap_byte32((uint32_t)x);
104 else if (sizeof(T) == 2)
105 return swap_byte16((uint16_t)x);
106 else if (sizeof(T) == 1)
107 return x;
108 else
109 panic("Can't byte-swap values larger than 64 bits");
110}
113
114//The conversion functions with fixed endianness on both ends don't need to
115//be in a namespace
116template <typename T> static inline T betole(T value) {return swap_byte(value);}
117template <typename T> static inline T letobe(T value) {return swap_byte(value);}
118
119//For conversions not involving the guest system, we can define the functions
120//conditionally based on the BYTE_ORDER macro and outside of the namespaces

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112//The conversion functions with fixed endianness on both ends don't need to
113//be in a namespace
114template <typename T> static inline T betole(T value) {return swap_byte(value);}
115template <typename T> static inline T letobe(T value) {return swap_byte(value);}
116
117//For conversions not involving the guest system, we can define the functions
118//conditionally based on the BYTE_ORDER macro and outside of the namespaces

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