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/*
* Copyright 1996 Thierry Bousch
* Licensed under the Gnu Public License, Version 2
*
* $Id: mp-arch.h,v 1.5 1996/09/13 22:56:58 bousch Exp $
*
* Architecture-dependant definitions for multiprecision arithmetic.
*/
#ifndef _SAML_MP_ARCH_H
#define _SAML_MP_ARCH_H
#include "saml-util.h"
#if defined(__alpha__) || defined(NO_ASM)
/*
* FIXME: the following definitions are certainly far from optimal.
* See longlong.h
*/
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
do { \
__u32 __x = (al) + (bl); \
(sh) = (ah) + (bh) + (__x < (al)); \
(sl) = __x; \
} while(0)
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
do { \
__u32 __x = (al) - (bl); \
(sh) = (ah) - (bh) - (__x > (al)); \
(sl) = __x; \
} while(0)
#define umul_ppmm(xh, xl, m0, m1) \
do { \
__u64 __tmp = (__u64)(m0) * (m1); \
(xl) = __tmp; \
(xh) = __tmp >> 32; \
} while(0)
#define udiv_qrnnd(q, r, n1, n0, d) \
do { \
__u64 __tmp = ((__u64)(n1) << 32) + (n0); \
__u64 __quot = __tmp / (d); \
__u64 __rem = __tmp % (d); \
(q) = __quot; \
(r) = __rem; \
} while(0)
#else /* not alpha */
/*
* For 32-bit architectures, things are better. We don't support machines
* without hardware division (like early sparcs); too much hassle, and
* it would be too slow anyway. You can still get SAML to compile by
* defining NO_ASM.
*/
#include "longlong.h"
#if UDIV_NEEDS_NORMALIZATION
#error "UDIV_NEEDS_NORMALIZATION must be zero"
#endif
#endif
#endif /* _SAML_MP_ARCH_H */
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