#ifndef included_clib_h
#define included_clib_h
+#include <vppinfra/config.h>
+
/* Standalone means to not assume we are running on a Unix box. */
#if ! defined (CLIB_STANDALONE) && ! defined (CLIB_LINUX_KERNEL)
#define CLIB_UNIX
#define CLIB_PACKED(x) x __attribute__ ((packed))
#define CLIB_UNUSED(x) x __attribute__ ((unused))
+/* Make a string from the macro's argument */
+#define CLIB_STRING_MACRO(x) #x
+
+#define __clib_unused __attribute__ ((unused))
+#define __clib_weak __attribute__ ((weak))
+#define __clib_packed __attribute__ ((packed))
+#define __clib_constructor __attribute__ ((constructor))
+
#define never_inline __attribute__ ((__noinline__))
#if CLIB_DEBUG > 0
decl
/* Use __builtin_clz if available. */
-#ifdef __GNUC__
-#include <features.h>
-#if __GNUC_PREREQ(3, 4)
#if uword_bits == 64
-#define count_leading_zeros(count,x) count = __builtin_clzll (x)
-#define count_trailing_zeros(count,x) count = __builtin_ctzll (x)
-#else
-#define count_leading_zeros(count,x) count = __builtin_clzl (x)
-#define count_trailing_zeros(count,x) count = __builtin_ctzl (x)
-#endif
-#endif
-#endif
-
-#ifndef count_leading_zeros
-
-/* Misc. integer arithmetic functions. */
-#if defined (i386)
-#define count_leading_zeros(count, x) \
- do { \
- word _clz; \
- __asm__ ("bsrl %1,%0" \
- : "=r" (_clz) : "rm" ((word) (x)));\
- (count) = _clz ^ 31; \
- } while (0)
-
-#define count_trailing_zeros(count, x) \
- __asm__ ("bsfl %1,%0" : "=r" (count) : "rm" ((word)(x)))
-#endif /* i386 */
-
-#if defined (__alpha__) && defined (HAVE_CIX)
-#define count_leading_zeros(count, x) \
- __asm__ ("ctlz %1,%0" \
- : "=r" ((word) (count)) \
- : "r" ((word) (x)))
-#define count_trailing_zeros(count, x) \
- __asm__ ("cttz %1,%0" \
- : "=r" ((word) (count)) \
- : "r" ((word) (x)))
-#endif /* alpha && HAVE_CIX */
-
-#if __mips >= 4
-
-/* Select between 32/64 opcodes. */
-#if uword_bits == 32
-#define count_leading_zeros(_count, _x) \
- __asm__ ("clz %[count],%[x]" \
- : [count] "=r" ((word) (_count)) \
- : [x] "r" ((word) (_x)))
+#define count_leading_zeros(x) __builtin_clzll (x)
+#define count_trailing_zeros(x) __builtin_ctzll (x)
#else
-#define count_leading_zeros(_count, _x) \
- __asm__ ("dclz %[count],%[x]" \
- : [count] "=r" ((word) (_count)) \
- : [x] "r" ((word) (_x)))
+#define count_leading_zeros(x) __builtin_clzl (x)
+#define count_trailing_zeros(x) __builtin_ctzl (x)
#endif
-#endif /* __mips >= 4 */
-
-#endif /* count_leading_zeros */
-
#if defined (count_leading_zeros)
always_inline uword
min_log2 (uword x)
{
uword n;
- count_leading_zeros (n, x);
+ n = count_leading_zeros (x);
return BITS (uword) - n - 1;
}
#else
{
uword result;
#ifdef count_trailing_zeros
- count_trailing_zeros (result, x);
+ result = count_trailing_zeros (x);
#else
result = min_log2 (first_set (x));
#endif