https://git.ugfx.io/uGFX/uGFX/src/master/src/gdisp/gdisp_image_support.h#L26
#define gdispImageSwapWords32(dw) ((((uint32_t)(w))>>16)|(((uint32_t)(w))<<16))
#define gdispImageSwapBytes32(dw) (((((uint32_t)(w))&0xFF000000)>>8)|((((uint32_t)(w))&0x00FF0000)<<8)\
|((((uint32_t)(w))&0x0000FF00)>>8)|(((uint32_t)(w))<<8))
dw macro variable but the expression just uses "w"
Interestingly enough there's another bug with endian detection now with gcc 6.2 as its detecting my 32-bit cortex m-7 as 64-bit.....and setting GFX_CPU_ENDIAN_BIG