> For the complete documentation index, see [llms.txt](https://docs.hex-rays.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hex-rays.com/8.4/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/655.md).

# rotate\_left

```
rotate a value to the left (or right)
   arguments:
        x      - value to rotate
        count  - number of times to rotate. negative counter means
                 rotate to the right
        nbits  - number of bits to rotate
        offset - offset of the first bit to rotate
returns: the value with the specified field rotated
         all other bits are not modified
Thread-safe function.

long rotate_left(long value, long count, long nbits, long offset);

#define rotate_dword(x, count) rotate_left(x, count, 32, 0)
#define rotate_word(x, count)  rotate_left(x, count, 16, 0)
#define rotate_byte(x, count)  rotate_left(x, count,  8, 0)
```


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