URL https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk

Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc1/] [newlib/] [libc/] [misc/] [ffs.c] - Diff between revs 207 and 345

Rev 207	Rev 345
`/*`	`/*`
`FUNCTION`	`FUNCTION`
`<<ffs>>---find first bit set in a word`	`<<ffs>>---find first bit set in a word`

`INDEX`	`INDEX`
`ffs`	`ffs`

`ANSI_SYNOPSIS`	`ANSI_SYNOPSIS`
`int ffs(int <[word]>);`	`int ffs(int <[word]>);`

`TRAD_SYNOPSIS`	`TRAD_SYNOPSIS`
`int ffs(<[word]>);`	`int ffs(<[word]>);`

`DESCRIPTION`	`DESCRIPTION`

`<<ffs>> returns the first bit set in a word.`	`<<ffs>> returns the first bit set in a word.`

`RETURNS`	`RETURNS`
`<<ffs>> returns 0 if <[c]> is 0, 1 if <[c]> is odd, 2 if <[c]> is a multiple of`	`<<ffs>> returns 0 if <[c]> is 0, 1 if <[c]> is odd, 2 if <[c]> is a multiple of`
`2, etc.`	`2, etc.`

`PORTABILITY`	`PORTABILITY`
`<<ffs>> is not ANSI C.`	`<<ffs>> is not ANSI C.`

`No supporting OS subroutines are required. */`	`No supporting OS subroutines are required. */`

`#include <_ansi.h>`	`#include <_ansi.h>`

`int`	`int`
`_DEFUN(ffs, (word),`	`_DEFUN(ffs, (word),`
`int word)`	`int word)`
`{`	`{`
`int i;`	`int i;`

`if (!word)`	`if (!word)`
`return 0;`	`return 0;`

`i = 0;`	`i = 0;`
`for (;;)`	`for (;;)`
`{`	`{`
`if (((1 << i++) & word) != 0)`	`if (((1 << i++) & word) != 0)`
`return i;`	`return i;`
`}`	`}`
`}`	`}`