8 #ifndef BOTAN_MP_MADD_H__     9 #define BOTAN_MP_MADD_H__    11 #include <botan/mp_types.h>    15 #if (BOTAN_MP_WORD_BITS != 64)    16    #error The mp_asm64 module requires that BOTAN_MP_WORD_BITS == 64    19 #if defined(BOTAN_TARGET_ARCH_IS_ALPHA)    21 #define BOTAN_WORD_MUL(a,b,z1,z0) do {                   \    22    asm("umulh %1,%2,%0" : "=r" (z0) : "r" (a), "r" (b)); \    26 #elif defined(BOTAN_TARGET_ARCH_IS_IA64)    28 #define BOTAN_WORD_MUL(a,b,z1,z0) do {                     \    29    asm("xmpy.hu %0=%1,%2" : "=f" (z0) : "f" (a), "f" (b)); \    33 #elif defined(BOTAN_TARGET_ARCH_IS_PPC64)    35 #define BOTAN_WORD_MUL(a,b,z1,z0) do {                           \    36    asm("mulhdu %0,%1,%2" : "=r" (z0) : "r" (a), "r" (b) : "cc"); \    40 #elif defined(BOTAN_TARGET_ARCH_IS_MIPS64)    42 #define BOTAN_WORD_MUL(a,b,z1,z0) do {                            \    43    typedef unsigned int uint128_t __attribute__((mode(TI)));      \    44    uint128_t r = (uint128_t)a * b;                                \    45    z0 = (r >> 64) & 0xFFFFFFFFFFFFFFFF;                           \    46    z1 = (r      ) & 0xFFFFFFFFFFFFFFFF;                           \    56    const size_t MP_HWORD_BITS = BOTAN_MP_WORD_BITS / 2;
    57    const word MP_HWORD_MASK = ((word)1 << MP_HWORD_BITS) - 1;
    59    const word a_hi = (a >> MP_HWORD_BITS);
    60    const word a_lo = (a & MP_HWORD_MASK);
    61    const word b_hi = (b >> MP_HWORD_BITS);
    62    const word b_lo = (b & MP_HWORD_MASK);
    64    word x0 = a_hi * b_hi;
    65    word x1 = a_lo * b_hi;
    66    word x2 = a_hi * b_lo;
    67    word x3 = a_lo * b_lo;
    69    x2 += x3 >> (MP_HWORD_BITS);
    73       x0 += ((word)1 << MP_HWORD_BITS);
    75    *z0 = x0 + (x2 >> MP_HWORD_BITS);
    76    *z1 = ((x2 & MP_HWORD_MASK) << MP_HWORD_BITS) + (x3 & MP_HWORD_MASK);
    79 #define BOTAN_WORD_MUL(a,b,z1,z0) bigint_2word_mul(a, b, &z1, &z0) void bigint_2word_mul(word a, word b, word *z1, word *z0)
word word_madd3(word a, word b, word c, word *d)
#define BOTAN_WORD_MUL(a, b, z1, z0)
word word_madd2(word a, word b, word *c)