This patch contains the addition of the precision macros for integral and fractional bits according to clause 7.18a.3 of http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf. The macros are integer constants and added as predefined macros.

// Fractional bits of _Accum types __SACCUM_FBIT__ __ACCUM_FBIT__ __LACCUM_FBIT__ __USACCUM_FBIT__ __UACCUM_FBIT__ __ULACCUM_FBIT__ // Fractional bits of _Fract types __SFRACT_FBIT__ __FRACT_FBIT__ __LFRACT_FBIT__ __USFRACT_FBIT__ __UFRACT_FBIT__ __ULFRACT_FBIT__ // Integral bits of _Accum types __SACCUM_IBIT__ __ACCUM_IBIT__ __LACCUM_IBIT__ __USACCUM_IBIT__ __UACCUM_IBIT__ __ULACCUM_IBIT__