URL https://opencores.org/ocsvn/nios2ci/nios2ci/trunk

Subversion Repositories nios2ci

[/] [nios2ci/] [trunk/] [bitops/] [README] - Blame information for rev 3

Details | Compare with Previous | View Log


bit operation instructions
--------------------------
 
These are especially useful to be used in the Linux kernel in asm/bitops.h to
define the functions named correspondingly in Linux.
 
The following instructions are provided in the .vhd file named accordingly:
 
ffs
        find first (least-significat) set bit in a 32bit word
ffz
        find first (least-significat) zero bit in a 32bit word
fls
        find last (most-significant) set bit in a 32bit word
hweight
        hamming weight of a 32bit word

Line No.	Rev	Author	Line
1	3	tklauser	`bit operation instructions`
2			`--------------------------`
3
4			`These are especially useful to be used in the Linux kernel in asm/bitops.h to`
5			`define the functions named correspondingly in Linux.`
6
7			`The following instructions are provided in the .vhd file named accordingly:`
8
9			`ffs`
10			`find first (least-significat) set bit in a 32bit word`
11			`ffz`
12			`find first (least-significat) zero bit in a 32bit word`
13			`fls`
14			`find last (most-significant) set bit in a 32bit word`
15			`hweight`
16			`hamming weight of a 32bit word`

Browse

Tools

Subversion Repositories nios2ci

[/] [nios2ci/] [trunk/] [bitops/] [README] - Blame information for rev 3