version 1.1, 2018/09/19 05:45:07 |
version 1.3, 2018/10/01 05:49:06 |
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/* $OpenXM$ */ |
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#include "gmp.h" |
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mp_limb_t mul64(mp_limb_t a,mp_limb_t b,mp_limb_t *c) |
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{ |
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mp_limb_t u; |
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u = (mp_limb_t)mpn_mul_1((mp_limb_t *)c,(mp_limb_t *)&a,1,(mp_limb_t)b); |
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c[1] = u; |
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return u; |
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} |
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mp_limb_t mod64(mp_limb_t u,mp_limb_t l,mp_limb_t b) |
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{ |
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mp_limb_t q[2],d[2]; |
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mp_limb_t r; |
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d[0] = l; d[1] = u; |
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r = (mp_limb_t)mpn_divmod_1((mp_limb_t *)q,(mp_limb_t *)d,2,(mp_limb_t)b); |
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return r; |
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} |
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mp_limb_t mulmod64(mp_limb_t a,mp_limb_t b,mp_limb_t m) |
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{ |
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mp_limb_t d[2],q[2]; |
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mp_limb_t r; |
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d[1] = (mp_limb_t)mpn_mul_1(d,(mp_limb_t *)&a,1,(mp_limb_t)b); |
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r = (mp_limb_t)mpn_divmod_1((mp_limb_t *)q,(mp_limb_t *)d,2,(mp_limb_t)m); |
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return r; |
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} |
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mp_limb_t muladdmod64(mp_limb_t a,mp_limb_t b,mp_limb_t c,mp_limb_t m) |
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{ |
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mp_limb_t d[2],q[2]; |
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mp_limb_t r; |
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d[0] = c; |
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d[1] = (mp_limb_t)mpn_addmul_1(d,(mp_limb_t *)&a,1,(mp_limb_t)b); |
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r = (mp_limb_t)mpn_divmod_1((mp_limb_t *)q,(mp_limb_t *)d,2,(mp_limb_t)m); |
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return r; |
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} |
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mp_limb_t invmod64(mp_limb_t a,mp_limb_t m) |
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{ |
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mpz_t x,y,z; |
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mpz_init_set_ui(x,a); |
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mpz_init_set_ui(y,m); |
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mpz_init(z); |
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mpz_invert(z,x,y); |
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return mpz_get_ui(z); |
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} |