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Beware the builtins - Hardwarebug

__builtin_bswap64 : Byte-swap a 64-bit word. __builtin_clz: Count leading ... The code for __builtin_ctz is reasonable for ARMv6 and earlier:

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查詢 「__Builtin_bswap64」的人也找了：

  1. __Builtin_popcount
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  5. __builtin_FUNCTION
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  6. __Builtin_bswap32
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  7. __Builtin_clz
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  8. __Builtin_assume_aligned
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