gipfeli/config.h at master · google/gipfeli

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/* Some basic macro definitions for high performance.

* You can use a build system (such as autotools or cmake) to test for

* these features and define HAVE_* or NO_* to turn them on or off.

* Otherwise, attempt to determine support based on checking macros

* defined by the compiler and/or libc. */

/* Define to 1 if the compiler supports __builtin_ctz and friends.

Clang and Intel both define __GNUC__ (and support __builtin_ctz and

__builtin_expect) */

#if !defined(NO_BUILTIN_CTZ) && !defined(HAVE_BUILTIN_CTZ)

# if defined(__GNUC__)

# define HAVE_BUILTIN_CTZ 1

# endif

#endif

/* Define to 1 if the compiler supports __builtin_expect. */

#if !defined(NO_BUILTIN_EXPECT) && !defined(HAVE_BUILTIN_EXPECT)

# if defined(__GNUC__)

# define HAVE_BUILTIN_EXPECT 1

# endif

#endif