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/*************************************************
* Lowest Level MPI Algorithms Header File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#ifndef BOTAN_MP_ASM_H__
#define BOTAN_MP_ASM_H__
#include <botan/mp_types.h>
#if (BOTAN_MP_WORD_BITS != 64)
#error The mp_amd64 module requires that BOTAN_MP_WORD_BITS == 64
#endif
namespace Botan {
extern "C" {
/*************************************************
* Word Multiply *
*************************************************/
inline word word_madd2(word a, word b, word c, word* carry)
{
asm(
"mulq %1\n\t" // a(in eax) * b(wherever) -> edx:eax
"addq %5,%0\n\t" // add c to low word (eax)
"adcq $0,%2" // add carry from previous to high word (edx)
: "=a"(a), "=rm"(b), "=&d"(*carry)
: "0"(a), "1"(b), "g"(c) : "cc");
return a;
}
/*************************************************
* Word Multiply/Add *
*************************************************/
inline word word_madd3(word a, word b, word c, word d, word* carry)
{
asm(
"mulq %1\n\t" // a(in eax) * b(wherever) -> edx:eax
"addq %5,%0\n\t" // add c to low word (eax)
"adcq $0,%2\n\t" // add carry from previous to high word (edx)
"addq %6,%0\n\t" // add d to low word (eax)
"adcq $0,%2" // add carry from previous to high word (edx)
: "=a"(a), "=rm"(b), "=&d"(*carry)
: "0"(a), "1"(b), "g"(c), "g"(d) : "cc");
return a;
}
/*************************************************
* Multiply-Add Accumulator *
*************************************************/
inline void word3_muladd(word* w2, word* w1, word* w0, word a, word b)
{
asm("mulq %[b]\n\t" // a(in eax) * b(wherever) -> edx:eax
"addq %3,%[w0]\n\t" // add c to low word (eax)
"adcq %4,%[w1]\n\t" // add carry from previous to high word (edx)
"adcq $0,%[w2]\n\t" // add carry from previous to high word (edx)
: [w0]"=r"(*w0), [w1]"=r"(*w1), [w2]"=r"(*w2)
: "a"(a), [b]"d"(b), "0"(*w0), "1"(*w1), "2"(*w2)
: "cc");
}
/*************************************************
* Multiply-Add Accumulator *
*************************************************/
inline void word3_muladd_2(word* w2, word* w1, word* w0, word a, word b)
{
asm("mulq %[b]\n\t" // a(in eax) * b(wherever) -> edx:eax
"addq %3,%[w0]\n\t" // add c to low word (eax)
"adcq %4,%[w1]\n\t" // add carry from previous to high word (edx)
"adcq $0,%[w2]\n\t" // add carry from previous to high word (edx)
"addq %3,%[w0]\n\t" // add c to low word (eax)
"adcq %4,%[w1]\n\t" // add carry from previous to high word (edx)
"adcq $0,%[w2]\n\t" // add carry from previous to high word (edx)
: [w0]"=r"(*w0), [w1]"=r"(*w1), [w2]"=r"(*w2)
: "a"(a), [b]"d"(b), "0"(*w0), "1"(*w1), "2"(*w2)
: "cc");
}
}
}
#endif
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