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Add dummy __has_builtin macro, use rotate builtins if possible

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Nekotekina 2019-02-27 23:10:40 +03:00
parent 765d15f23f
commit 7f6a410770
3 changed files with 36 additions and 11 deletions
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32
Utilities/asm.h
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@ -71,58 +71,90 @@ namespace utils
inline u8 rol8(u8 x, u8 n)
{
#if __has_builtin(__builtin_rotateleft8)
return __builtin_rotateleft8(x, n);
#else
u8 result = x;
__asm__("rolb %[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u8 ror8(u8 x, u8 n)
{
#if __has_builtin(__builtin_rotateright8)
return __builtin_rotateright8(x, n);
#else
u8 result = x;
__asm__("rorb %[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u16 rol16(u16 x, u16 n)
{
#if __has_builtin(__builtin_rotateleft16)
return __builtin_rotateleft16(x, n);
#else
u16 result = x;
__asm__("rolw %b[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u16 ror16(u16 x, u16 n)
{
#if __has_builtin(__builtin_rotateright16)
return __builtin_rotateright16(x, n);
#else
u16 result = x;
__asm__("rorw %b[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u32 rol32(u32 x, u32 n)
{
#if __has_builtin(__builtin_rotateleft32)
return __builtin_rotateleft32(x, n);
#else
u32 result = x;
__asm__("roll %b[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u32 ror32(u32 x, u32 n)
{
#if __has_builtin(__builtin_rotateright32)
return __builtin_rotateright32(x, n);
#else
u32 result = x;
__asm__("rorl %b[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u64 rol64(u64 x, u64 n)
{
#if __has_builtin(__builtin_rotateleft64)
return __builtin_rotateleft64(x, n);
#else
u64 result = x;
__asm__("rolq %b[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u64 ror64(u64 x, u64 n)
{
#if __has_builtin(__builtin_rotateright64)
return __builtin_rotateright64(x, n);
#else
u64 result = x;
__asm__("rorq %b[n], %[result]" : [result] "+g"(result) : [n] "c"(n));
return result;
#endif
}
inline u64 umulh64(u64 a, u64 b)