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On little endian architectures, use LWIP_PLATFORM_HTONS (if defined) for SWAP_BYTES_IN_WORD to speed up checksumming.
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@ -99,6 +99,10 @@ HISTORY
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++ Bugfixes:
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2009-05-06 Simon Goldschmidt
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* inet_chksum.c: On little endian architectures, use LWIP_PLATFORM_HTONS (if
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defined) for SWAP_BYTES_IN_WORD to speed up checksumming.
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2009-05-05 Simon Goldschmidt
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* sockets.c: bug #26405: Prematurely released semaphore causes lwip_select()
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to crash
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@ -64,7 +64,14 @@
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#endif
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/** Like the name says... */
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#if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)
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/* little endian and PLATFORM_BYTESWAP defined */
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#define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(x)
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#else
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/* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */
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#define SWAP_BYTES_IN_WORD(w) ((w & 0xff) << 8) | ((w & 0xff00) >> 8)
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#endif
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/** Split an u32_t in two u16_ts and add them up */
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#define FOLD_U32T(u) ((u >> 16) + (u & 0x0000ffffUL))
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