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These are the 64-bit equivalent of htonl() and ntohl(). They're a bit tricky in order to avoid expensive operations. The principle consists in letting the compiler detect we're playing with a union and simplify most or all operations. The asm-optimized htonl() version involving bswap (x86) / rev (arm) / other is a single operation on little endian, or a NOP on big-endian. In both cases, this lets the compiler "see" that we're rebuilding a 64-bit word from two 32-bit quantities that fit into a 32-bit register. In big endian, the whole code is optimized out. In little endian, with a decent compiler, a few bswap and 2 shifts are left, which is the minimum acceptable. |
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| .. | ||
| accept4.h | ||
| appsession.h | ||
| base64.h | ||
| buffer.h | ||
| cfgparse.h | ||
| chunk.h | ||
| compat.h | ||
| compiler.h | ||
| config.h | ||
| debug.h | ||
| defaults.h | ||
| epoll.h | ||
| errors.h | ||
| hash.h | ||
| memory.h | ||
| mini-clist.h | ||
| namespace.h | ||
| rbtree.h | ||
| regex.h | ||
| sessionhash.h | ||
| splice.h | ||
| standard.h | ||
| syscall.h | ||
| template.h | ||
| ticks.h | ||
| time.h | ||
| tools.h | ||
| uri_auth.h | ||
| version.h | ||