Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/lib/libkern/bswap16.c

24 lines
472 B
C
Raw Normal View History

Move the bswap functions from libutil to libc (this bups the minor of libc and the major of libutil). For little-endian architectures merge the bnswap() assembly versions with nto* and hton* using symbols aliasing. Use symbol renaming for the bswap function in this case to avoid namespace pollution. Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian machines, common code for inline macros go in machine/byte_swap.h Sync libkern with libc. Adjust #include in kernel sources for machine/bswap.h.
1999-01-15 16:31:15 +03:00
/* $NetBSD: bswap16.c,v 1.2 1999/01/15 13:31:28 bouyer Exp $ */
Add byte-swapping functions (bswap16, bswap32, bswap64) to libkern. Only assembly version for i386 bswap16 and bswap32 for now (bswap64 uses bswap32). Contribution of assembly versions of these are welcome. Add byte-swapping of ext2fs metadata for big-endian systems. Tested on i386 and sparc.
1997-10-09 19:42:19 +04:00
/*
* Written by Manuel Bouyer <bouyer@netbsd.org>.
* Public domain.
*/
Move the bswap functions from libutil to libc (this bups the minor of libc and the major of libutil). For little-endian architectures merge the bnswap() assembly versions with nto* and hton* using symbols aliasing. Use symbol renaming for the bswap function in this case to avoid namespace pollution. Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian machines, common code for inline macros go in machine/byte_swap.h Sync libkern with libc. Adjust #include in kernel sources for machine/bswap.h.
1999-01-15 16:31:15 +03:00
#include <sys/cdefs.h>
Add byte-swapping functions (bswap16, bswap32, bswap64) to libkern. Only assembly version for i386 bswap16 and bswap32 for now (bswap64 uses bswap32). Contribution of assembly versions of these are welcome. Add byte-swapping of ext2fs metadata for big-endian systems. Tested on i386 and sparc.
1997-10-09 19:42:19 +04:00
#if defined(LIBC_SCCS) && !defined(lint)
Move the bswap functions from libutil to libc (this bups the minor of libc and the major of libutil). For little-endian architectures merge the bnswap() assembly versions with nto* and hton* using symbols aliasing. Use symbol renaming for the bswap function in this case to avoid namespace pollution. Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian machines, common code for inline macros go in machine/byte_swap.h Sync libkern with libc. Adjust #include in kernel sources for machine/bswap.h.
1999-01-15 16:31:15 +03:00
__RCSID("$NetBSD: bswap16.c,v 1.2 1999/01/15 13:31:28 bouyer Exp $");
#endif /* LIBC_SCCS and not lint */
Add byte-swapping functions (bswap16, bswap32, bswap64) to libkern. Only assembly version for i386 bswap16 and bswap32 for now (bswap64 uses bswap32). Contribution of assembly versions of these are welcome. Add byte-swapping of ext2fs metadata for big-endian systems. Tested on i386 and sparc.
1997-10-09 19:42:19 +04:00
#include <sys/types.h>
Move the bswap functions from libutil to libc (this bups the minor of libc and the major of libutil). For little-endian architectures merge the bnswap() assembly versions with nto* and hton* using symbols aliasing. Use symbol renaming for the bswap function in this case to avoid namespace pollution. Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian machines, common code for inline macros go in machine/byte_swap.h Sync libkern with libc. Adjust #include in kernel sources for machine/bswap.h.
1999-01-15 16:31:15 +03:00
#include <machine/bswap.h>
Add byte-swapping functions (bswap16, bswap32, bswap64) to libkern. Only assembly version for i386 bswap16 and bswap32 for now (bswap64 uses bswap32). Contribution of assembly versions of these are welcome. Add byte-swapping of ext2fs metadata for big-endian systems. Tested on i386 and sparc.
1997-10-09 19:42:19 +04:00
#undef bswap16
u_int16_t
bswap16(x)
Move the bswap functions from libutil to libc (this bups the minor of libc and the major of libutil). For little-endian architectures merge the bnswap() assembly versions with nto* and hton* using symbols aliasing. Use symbol renaming for the bswap function in this case to avoid namespace pollution. Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian machines, common code for inline macros go in machine/byte_swap.h Sync libkern with libc. Adjust #include in kernel sources for machine/bswap.h.
1999-01-15 16:31:15 +03:00
u_int16_t x;
Add byte-swapping functions (bswap16, bswap32, bswap64) to libkern. Only assembly version for i386 bswap16 and bswap32 for now (bswap64 uses bswap32). Contribution of assembly versions of these are welcome. Add byte-swapping of ext2fs metadata for big-endian systems. Tested on i386 and sparc.
1997-10-09 19:42:19 +04:00
{
return ((x << 8) & 0xff00) | ((x >> 8) & 0x00ff);
}