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question about __builtin_ctz

Hi, I have a question. I used '__builtin_ctz' function in arm compiler and it worked well, but I don't know which header file contains '__builtin_ctz' function. Do you know which header file is needed to use '__builtin_ctz' function?

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Tamar Christina over 1 year ago +1 suggested

Hi, as the name implies, a builtin is a compiler intrinsnic, they're not provided by a header. They are "builtin" to the compiler as it were.
Tamar Christina over 1 year ago in reply to zxczxca +1

not without the source code of the compiler. These aren't real functions, they are generated internally by the compiler.

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0 Tamar Christina over 1 year ago in reply to zxczxca

not without the source code of the compiler. These aren't real functions, they are generated internally by the compiler.
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0 Tamar Christina over 1 year ago in reply to zxczxca

not without the source code of the compiler. These aren't real functions, they are generated internally by the compiler.
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