Denis Vlasenko wrote:
The following macro expands to some rather frightful code on the AVR:#define BSWAP_16(x) \ ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))Sometimes gcc is generating better code if you cast values instead of masking. Try: ( (uint8_t)((x) >> 8) | ((uint8_t)(x)) << 8 )
gcc > 3.4.x always generates better code for casted values. This is PR middle-end/29749, and it affects i386 linux too. Uros.
