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=head2 GCC ATTRIBUTES |
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=over 4 |
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=item ecb_attribute ((attrs...)) |
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A simple wrapper that expands to C<__attribute__((attrs))> on GCC, and |
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to nothing on other compilers, so the effect is that only GCC sees these. |
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=item ecb_noinline |
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=item ecb_noreturn |
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=item ecb_unused |
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=item ecb_const |
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=item ecb_pure |
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=item ecb_hot |
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=item ecb_cold |
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=item ecb_artificial |
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=back |
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=head2 OPTIMISATION HINTS |
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=over 4 |
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=item bool ecb_is_constant(expr) |
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=item bool ecb_expect(expr,value) |
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=item bool ecb_unlikely(bool) |
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=item bool ecb_likely(bool) |
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=item bool ecb_assume(cond) |
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=item bool ecb_unreachable() |
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=item bool ecb_prefetch(addr,rw,locality) |
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=back |
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=head2 BIT FIDDLING / BITSTUFFS |
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bool ecb_big_endian (); |
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bool ecb_little_endian (); |
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int ecb_ctz32 (uint32_t x); |
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int ecb_popcount32 (uint32_t x); |
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uint32_t ecb_bswap32 (uint32_t x); |
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uint32_t ecb_bswap16 (uint32_t x); |
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uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
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uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
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=head2 ARITHMETIC |
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x = ecb_mod (m, n) |
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=head2 UTILITY |
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ecb_array_length (name) |
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