25.3.15 The Allocation Order of Bit-Field

The memory ordering of bit-fields into their storage unit is not specified by the C Language Standard. In the CCI, the first bit defined is the least significant bit (LSb) of the storage unit in which it is allocated.

Example

struct {
        unsigned lo  : 1;
        unsigned mid :6;
        unsigned hi  : 1;
} foo;

The bit-field lo is assigned the least significant bit of the storage unit assigned to the structure foo. The bit-field mid is assigned the next 6 least significant bits, and hi, the most significant bit of that same storage unit byte.

Differences

This is identical with the previous operation of all compilers.

Migration to the CCI

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