This option specifies the order of bit-field members.
[Specification format]
- | Interpretation when omitted |
The bit-field members are allocated from the lower bit.
[Detailed description]
- | This option specifies the order of bit-field members. |
- | The items that can be specified as pos are shown below.
An error will occur if any other item is specified. |
|
left
|
The members are allocated from the upper bit.
|
|
right
|
The members are allocated from the lower bit.
|
- | An error will occur if pos is omitted. |
- | If this option is specified when the order of bit-field members is specified by the #pragma directive in the C source, the value specified by this option is applied to all members until the first #pragma bit_order directive appears.
After that, the value of the #pragma directive is applied. |
[Example of use]
- | To allocate the bit-field members from the upper bit, describe as: |
>ccrh -Xbit_order=left -Xcommon=rh850 main.c
|