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/*
* Lowest Level MPI Algorithms
* (C) 1999-2008 Jack Lloyd
* 2006 Luca Piccarreta
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_MP_ASM_H__
#define BOTAN_MP_ASM_H__
#include <botan/mp_types.h>
#if (BOTAN_MP_WORD_BITS == 8)
typedef Botan::u16bit dword;
#elif (BOTAN_MP_WORD_BITS == 16)
typedef Botan::size_t dword;
#elif (BOTAN_MP_WORD_BITS == 32)
typedef Botan::u64bit dword;
#elif (BOTAN_MP_WORD_BITS == 64)
#error BOTAN_MP_WORD_BITS can be 64 only with assembly support
#else
#error BOTAN_MP_WORD_BITS must be 8, 16, 32, or 64
#endif
namespace Botan {
extern "C" {
/*
* Word Multiply/Add
*/
inline word word_madd2(word a, word b, word* c)
{
dword z = (dword)a * b + *c;
*c = (word)(z >> BOTAN_MP_WORD_BITS);
return (word)z;
}
/*
* Word Multiply/Add
*/
inline word word_madd3(word a, word b, word c, word* d)
{
dword z = (dword)a * b + c + *d;
*d = (word)(z >> BOTAN_MP_WORD_BITS);
return (word)z;
}
}
}
#endif
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