=head2 GCC ATTRIBUTES

=over 4

=item ecb_attribute(attrlist)
=item ecb_noinline ecb_attribute ((noinline))
=item ecb_noreturn ecb_attribute ((noreturn))
=item ecb_unused   ecb_attribute ((unused))
=item ecb_const    ecb_attribute ((const))
=item ecb_pure     ecb_attribute ((pure))
=item ecb_hot      ecb_attribute ((hot))	/* 4.3 */
=item ecb_cold     ecb_attribute ((cold))	/* 4.3 */

   =back

=head2 OPTIMISATION HINTS

=over 4

=item bool ecb_is_constant(expr)

=item bool ecb_expect(expr,value)

=item bool ecb_unlikely(bool)

=item bool ecb_likely(bool)

=item bool ecb_assume(cond)

=item bool ecb_unreachable()

=item bool ecb_prefetch(addr,rw,locality)

   =back

=head2 BIT FIDDLING / BITSTUFFS

bool ecb_big_endian ();
bool ecb_little_endian ();
int ecb_ctz32 (uint32_t x);
int ecb_popcount32 (uint32_t x);
uint32_t ecb_bswap32 (uint32_t x);
uint32_t ecb_bswap16 (uint32_t x);
uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
uint32_t ecb_rotl32 (uint32_t x, unsigned int count);

=head2 ARITHMETIC

x = ecb_mod (m, n)

=head2 UTILITY

ecb_array_length (name)