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/* vim:ts=8:sts=4:sw=4:noai:noexpandtab
*
* PGM checksum routines
*
* Copyright (c) 2006-2008 Miru Limited.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if !defined (__PGM_IMPL_FRAMEWORK_H_INSIDE__) && !defined (PGM_COMPILATION)
# error "Only <framework.h> can be included directly."
#endif
#ifndef __PGM_IMPL_CHECKSUM_H__
#define __PGM_IMPL_CHECKSUM_H__
#include <pgm/types.h>
PGM_BEGIN_DECLS
uint16_t pgm_inet_checksum (const void*, uint16_t, uint16_t);
uint16_t pgm_csum_fold (uint32_t) PGM_GNUC_CONST;
uint32_t pgm_csum_block_add (uint32_t, uint32_t, const uint16_t) PGM_GNUC_CONST;
uint32_t pgm_compat_csum_partial (const void*, uint16_t, uint32_t);
uint32_t pgm_compat_csum_partial_copy (const void*restrict, void*restrict, uint16_t, uint32_t);
static inline uint32_t add32_with_carry (uint32_t, uint32_t) PGM_GNUC_CONST;
#if defined(__x86_64__) || defined(__i386__) || defined(__i386) || defined(__amd64)
static inline uint32_t add32_with_carry (uint32_t a, uint32_t b)
{
asm("addl %2, %0 \n\t"
"adcl $0, %0"
: "=r" (a) /* output operands */
: "0" (a), "r" (b)); /* input operands */
return a;
}
#elif defined(__sparc__) || defined(__sparc) || defined(__sparcv9)
static inline uint32_t add32_with_carry (uint32_t a, uint32_t b)
{
asm("addcc %2, %0, %0 \n\t"
"addx %0, %%g0, %0"
: "=r" (a) /* output operands */
: "0" (a), "r" (b) /* input operands */
: "cc"); /* list of clobbered registers */
return a;
}
#else
static inline uint32_t add32_with_carry (uint32_t a, uint32_t b)
{
a += b;
a = (a >> 16) + (a & 0xffff);
return a;
}
#endif
# define pgm_csum_partial pgm_compat_csum_partial
# define pgm_csum_partial_copy pgm_compat_csum_partial_copy
PGM_END_DECLS
#endif /* __PGM_IMPL_CHECKSUM_H__ */
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