4 * The author dedicates this file to the public domain.
5 * You can do whatever you want with this file.
8 #ifndef _WIMLIB_COMPILER_GCC_H
9 #define _WIMLIB_COMPILER_GCC_H
12 # define WIMLIBAPI __declspec(dllexport)
14 # define WIMLIBAPI __attribute__((visibility("default")))
17 #define _packed_attribute __attribute__((packed))
18 #define _aligned_attribute(n) __attribute__((aligned(n)))
19 #define _may_alias_attribute __attribute__((may_alias))
20 #define likely(expr) __builtin_expect(!!(expr), 1)
21 #define unlikely(expr) __builtin_expect(!!(expr), 0)
22 #define prefetch(addr) __builtin_prefetch(addr)
23 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
24 # define _cold_attribute __attribute__((cold))
26 #define _malloc_attribute __attribute__((malloc))
27 #define inline inline __attribute__((always_inline))
28 #define noinline __attribute__((noinline))
30 #define CPU_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
32 #if defined(__x86_64__) || defined(__i386__)
33 # define UNALIGNED_ACCESS_SPEED 3
34 #elif defined(__ARM_FEATURE_UNALIGNED) && (__ARM_FEATURE_UNALIGNED == 1)
35 # define UNALIGNED_ACCESS_SPEED 2
37 # define UNALIGNED_ACCESS_SPEED 0
40 #define typeof __typeof__
43 # define min(a, b) ({ typeof(a) _a = (a); typeof(b) _b = (b); \
44 (_a < _b) ? _a : _b; })
48 # define max(a, b) ({ typeof(a) _a = (a); typeof(b) _b = (b); \
49 (_a > _b) ? _a : _b; })
53 # define swap(a, b) ({ typeof(a) _a = (a); (a) = (b); (b) = _a; })
56 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
57 # define compiler_bswap32 __builtin_bswap32
58 # define compiler_bswap64 __builtin_bswap64
61 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
62 # define compiler_bswap16 __builtin_bswap16
65 #define compiler_fls32(n) (31 - __builtin_clz(n))
66 #define compiler_fls64(n) (63 - __builtin_clzll(n))
67 #define compiler_ffs32(n) __builtin_ctz(n)
68 #define compiler_ffs64(n) __builtin_ctzll(n)
70 #endif /* _WIMLIB_COMPILER_GCC_H */