moon-abe cleanup

Change-Id: Ie1259856db03f0b9e80de3e967ec6bd1f03191b3

1 files changed, 0 insertions, 546 deletions

diff --git a/moon-abe/pbc-0.5.14/arith/fasterfp.c b/moon-abe/pbc-0.5.14/arith/fasterfp.c
deleted file mode 100644
index 5ce8243a..00000000
--- a/moon-abe/pbc-0.5.14/arith/fasterfp.c
+++ /dev/null
@@ -1,546 +0,0 @@
-// Naive implementation of F_p.
-// It uses lowlevel GMP routines (mpn_* functions) like fastfp.c, but also
-// has a flag for the value 0, avoiding many memsets.
-//
-// I'm thinking of using the flag to also represent 1, -1,
-// but that complicates the logic even more, and I believe I need more
-// control than GMP is willing to give in order to avoid expensive
-// checks for 1, -1 everywhere.
-//
-// NOTE: does not work for moduli of the form:
-//   2^(something * 8 * sizeof(mp_limb_t))
-// See comments in add, double code.
-// (This kind of integer mod ring deserves its own implementation anyway.)
-
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdint.h> // for intptr_t
-#include <stdlib.h>
-#include <string.h>
-#include <gmp.h>
-#include "pbc_utils.h"
-#include "pbc_field.h"
-#include "pbc_random.h"
-#include "pbc_fp.h"
-#include "pbc_memory.h"
-
-struct fp_field_data_s {
-  size_t limbs;
-  size_t bytes;
-  mp_limb_t *primelimbs;
-};
-typedef struct fp_field_data_s fp_field_data_t[1];
-typedef struct fp_field_data_s *fp_field_data_ptr;
-
-struct data_s {
-  int flag;
-  mp_limb_t *d;
-};
-typedef struct data_s *dataptr;
-
-static void fp_init(element_ptr e) {
-  fp_field_data_ptr p = e->field->data;
-  dataptr dp = e->data = pbc_malloc(sizeof(struct data_s));
-  dp->flag = 0;
-  dp->d = pbc_malloc(p->bytes);
-}
-
-static void fp_clear(element_ptr e) {
-  dataptr dp = e->data;
-  pbc_free(dp->d);
-  pbc_free(e->data);
-}
-
-//assumes z is nonzero
-static inline void from_mpz(element_ptr e, mpz_ptr z) {
-  fp_field_data_ptr p = e->field->data;
-  size_t count;
-  dataptr dp = e->data;
-  mpz_export(dp->d, &count, -1, sizeof(mp_limb_t), 0, 0, z);
-  memset((void *) (((unsigned char *) dp->d) + count * sizeof(mp_limb_t)),
-         0, (p->limbs - count) * sizeof(mp_limb_t));
-}
-
-static void fp_set_mpz(element_ptr e, mpz_ptr z) {
-  dataptr dp = e->data;
-  if (!mpz_sgn(z)) {
-    dp->flag = 0;
-  } else {
-    mpz_t tmp;
-    mpz_init(tmp);
-    mpz_mod(tmp, z, e->field->order);
-    from_mpz(e, tmp);
-    mpz_clear(tmp);
-    dp->flag = 2;
-  }
-}
-
-static void fp_set_si(element_ptr e, signed long int op) {
-  dataptr dp = e->data;
-  if (!op) {
-    dp->flag = 0;
-  } else {
-    const fp_field_data_ptr p = e->field->data;
-    const size_t t = p->limbs;
-    if (op < 0) {
-      mpn_sub_1(dp->d, p->primelimbs, t, -op);
-    } else {
-      dp->d[0] = op;
-      memset(&dp->d[1], 0, sizeof(mp_limb_t) * (t - 1));
-    }
-    dp->flag = 2;
-  }
-}
-
-static void fp_to_mpz(mpz_ptr z, element_ptr e) {
-  dataptr dp = e->data;
-  if (!dp->flag) {
-    mpz_set_ui(z, 0);
-  } else {
-    fp_field_data_ptr p = e->field->data;
-    mpz_import(z, p->limbs, -1, sizeof(mp_limb_t), 0, 0, dp->d);
-  }
-}
-
-static void fp_set0(element_ptr e) {
-  dataptr dp = e->data;
-  dp->flag = 0;
-}
-
-static void fp_set1(element_ptr e) {
-  fp_field_data_ptr p = e->field->data;
-  dataptr dp = e->data;
-  dp->flag = 2;
-  memset(&dp->d[1], 0, p->bytes - sizeof(mp_limb_t));
-  dp->d[0] = 1;
-}
-
-static int fp_is1(element_ptr e) {
-  dataptr dp = e->data;
-  if (!dp->flag) return 0;
-  else {
-    fp_field_data_ptr p = e->field->data;
-    size_t i, t = p->limbs;
-    if (dp->d[0] != 1) return 0;
-    for (i = 1; i < t; i++) if (dp->d[i]) return 0;
-    return 1;
-  }
-}
-
-static int fp_is0(element_ptr e) {
-  dataptr dp = e->data;
-  return !dp->flag;
-}
-
-static size_t fp_out_str(FILE * stream, int base, element_ptr e) {
-  size_t result;
-  mpz_t z;
-  mpz_init(z);
-  fp_to_mpz(z, e);
-  result = mpz_out_str(stream, base, z);
-  mpz_clear(z);
-  return result;
-}
-
-static void fp_set(element_ptr c, element_ptr a) {
-  dataptr ad = a->data;
-  dataptr cd = c->data;
-  if (a == c) return;
-  if (!ad->flag) {
-    cd->flag = 0;
-  } else {
-    fp_field_data_ptr p = a->field->data;
-
-    //Assembly is faster here, but I don't want to stoop to that level.
-    //Instead of calling slower memcpy, wrap stuff so that GMP assembly
-    //gets called.
-    /*
-       memcpy(cd->d, ad->d, p->bytes);
-     */
-    mpz_t z1, z2;
-    z1->_mp_d = cd->d;
-    z2->_mp_d = ad->d;
-    z1->_mp_size = z1->_mp_alloc = z2->_mp_size = z2->_mp_alloc = p->limbs;
-    mpz_set(z1, z2);
-
-    cd->flag = 2;
-  }
-}
-
-static void fp_add(element_ptr c, element_ptr a, element_ptr b) {
-  dataptr ad = a->data, bd = b->data;
-
-  if (!ad->flag) {
-    fp_set(c, b);
-  } else if (!bd->flag) {
-    fp_set(c, a);
-  } else {
-    dataptr cd = c->data;
-    fp_field_data_ptr p = a->field->data;
-    const size_t t = p->limbs;
-    mp_limb_t carry;
-    carry = mpn_add_n(cd->d, ad->d, bd->d, t);
-
-    if (carry) {
-      //assumes result of following sub is not zero,
-      //i.e. modulus cannot be 2^(n * bits_per_limb)
-      mpn_sub_n(cd->d, cd->d, p->primelimbs, t);
-      cd->flag = 2;
-    } else {
-      int i = mpn_cmp(cd->d, p->primelimbs, t);
-      if (!i) {
-        cd->flag = 0;
-      } else {
-        cd->flag = 2;
-        if (i > 0) {
-          mpn_sub_n(cd->d, cd->d, p->primelimbs, t);
-        }
-      }
-    }
-  }
-}
-
-static void fp_double(element_ptr c, element_ptr a) {
-  dataptr ad = a->data, cd = c->data;
-  if (!ad->flag) {
-    cd->flag = 0;
-  } else {
-    fp_field_data_ptr p = c->field->data;
-    const size_t t = p->limbs;
-    if (mpn_lshift(cd->d, ad->d, t, 1)) {
-      cd->flag = 2;
-      //again, assumes result is not zero:
-      mpn_sub_n(cd->d, cd->d, p->primelimbs, t);
-    } else {
-      int i = mpn_cmp(cd->d, p->primelimbs, t);
-      if (!i) {
-        cd->flag = 0;
-      } else {
-        cd->flag = 2;
-        if (i > 0) {
-          mpn_sub_n(cd->d, cd->d, p->primelimbs, t);
-        }
-      }
-    }
-  }
-}
-
-static void fp_halve(element_ptr c, element_ptr a) {
-  dataptr ad = a->data, cd = c->data;
-  if (!ad->flag) {
-    cd->flag = 0;
-  } else {
-    fp_field_data_ptr p = c->field->data;
-    const size_t t = p->limbs;
-    int carry = 0;
-    mp_limb_t *alimb = ad->d;
-    mp_limb_t *climb = cd->d;
-    if (alimb[0] & 1) {
-      carry = mpn_add_n(climb, alimb, p->primelimbs, t);
-    } else fp_set(c, a);
-
-    mpn_rshift(climb, climb, t, 1);
-    if (carry) climb[t - 1] |= ((mp_limb_t) 1) << (sizeof(mp_limb_t) * 8 - 1);
-  }
-}
-
-static void fp_neg(element_ptr c, element_ptr a) {
-  dataptr ad = a->data, cd = c->data;
-  if (!ad->flag) cd->flag = 0;
-  else {
-    fp_field_data_ptr p = a->field->data;
-    mpn_sub_n(cd->d, p->primelimbs, ad->d, p->limbs);
-    cd->flag = 2;
-  }
-}
-
-static void fp_sub(element_ptr c, element_ptr a, element_ptr b) {
-  dataptr ad = a->data, bd = b->data;
-
-  if (!ad->flag) {
-    fp_neg(c, b);
-  } else if (!bd->flag) {
-    fp_set(c, a);
-  } else {
-    fp_field_data_ptr p = c->field->data;
-    size_t t = p->limbs;
-    dataptr cd = c->data;
-    int i = mpn_cmp(ad->d, bd->d, t);
-
-    if (i == 0) {
-      cd->flag = 0;
-    } else {
-      cd->flag = 2;
-      mpn_sub_n(cd->d, ad->d, bd->d, t);
-      if (i < 0) {
-        mpn_add_n(cd->d, cd->d, p->primelimbs, t);
-      }
-    }
-  }
-}
-
-static void fp_mul(element_ptr c, element_ptr a, element_ptr b) {
-  dataptr ad = a->data, bd = b->data;
-  dataptr cd = c->data;
-
-  if (!ad->flag || !bd->flag) {
-    cd->flag = 0;
-  } else {
-    fp_field_data_ptr p = c->field->data;
-    size_t t = p->limbs;
-    //mp_limb_t tmp[3 * t + 1];
-    //mp_limb_t *qp = &tmp[2 * t];
-    mp_limb_t tmp[2 * t];
-    mp_limb_t qp[t + 1];
-    //static mp_limb_t tmp[2 * 100];
-    //static mp_limb_t qp[100 + 1];
-
-    mpn_mul_n(tmp, ad->d, bd->d, t);
-
-    mpn_tdiv_qr(qp, cd->d, 0, tmp, 2 * t, p->primelimbs, t);
-    cd->flag = 2;
-  }
-}
-
-static void fp_square(element_ptr c, element_ptr a) {
-  const fp_field_data_ptr p = c->field->data;
-  mpz_t z1, z2;
-  size_t diff;
-  dataptr ad = a->data;
-  dataptr cd = c->data;
-
-  if (!ad->flag) {
-    cd->flag = 0;
-  } else {
-    cd->flag = 2;
-    z1->_mp_d = cd->d;
-    z1->_mp_size = z1->_mp_alloc = p->limbs;
-    if (c == a) {
-      mpz_powm_ui(z1, z1, 2, c->field->order);
-    } else {
-      z2->_mp_d = ad->d;
-      z2->_mp_size = z2->_mp_alloc = p->limbs;
-      mpz_powm_ui(z1, z2, 2, c->field->order);
-    }
-
-    diff = p->limbs - z1->_mp_size;
-    if (diff) memset(&z1->_mp_d[z1->_mp_size], 0, diff * sizeof(mp_limb_t));
-
-    //mpn_sqr_n() might make the code below faster than the code above
-    //but GMP doesn't expose this function
-    /*
-       const fp_field_data_ptr p = c->field->data;
-       const size_t t = p->limbs;
-       mp_limb_t tmp[2 * t];
-       mp_limb_t qp[t + 1];
-
-       mpn_mul_n(tmp, ad->d, ad->d, t);
-
-       mpn_tdiv_qr(qp, cd->d, 0, tmp, 2 * t, p->primelimbs, t);
-     */
-  }
-}
-
-static void fp_mul_si(element_ptr c, element_ptr a, signed long int op) {
-  dataptr ad = a->data;
-  dataptr cd = c->data;
-
-  if (!ad->flag || !op) {
-    cd->flag = 0;
-  } else {
-    cd->flag = 2;
-    fp_field_data_ptr p = a->field->data;
-    size_t t = p->limbs;
-    mp_limb_t tmp[t + 1];
-    mp_limb_t qp[2];
-
-    tmp[t] = mpn_mul_1(tmp, ad->d, t, labs(op));
-    mpn_tdiv_qr(qp, cd->d, 0, tmp, t + 1, p->primelimbs, t);
-    if (op < 0) {               //TODO: don't need to check c != 0 this time
-      fp_neg(c, c);
-    }
-  }
-}
-
-static void fp_pow_mpz(element_ptr c, element_ptr a, mpz_ptr op) {
-  dataptr ad = a->data;
-  dataptr cd = c->data;
-  if (!ad->flag) cd->flag = 0;
-  else {
-    mpz_t z;
-    mpz_init(z);
-    fp_to_mpz(z, a);
-    mpz_powm(z, z, op, a->field->order);
-    from_mpz(c, z);
-    mpz_clear(z);
-    cd->flag = 2;
-  }
-}
-
-static void fp_invert(element_ptr c, element_ptr a) {
-  //assumes a is invertible
-  dataptr cd = c->data;
-  mpz_t z;
-  mpz_init(z);
-  fp_to_mpz(z, a);
-  mpz_invert(z, z, a->field->order);
-  from_mpz(c, z);
-  mpz_clear(z);
-  cd->flag = 2;
-}
-
-static void fp_random(element_ptr a) {
-  dataptr ad = a->data;
-  mpz_t z;
-  mpz_init(z);
-  pbc_mpz_random(z, a->field->order);
-  if (mpz_sgn(z)) {
-    from_mpz(a, z);
-    ad->flag = 2;
-  } else {
-    ad->flag = 0;
-  }
-  mpz_clear(z);
-}
-
-static void fp_from_hash(element_ptr a, void *data, int len) {
-  mpz_t z;
-
-  mpz_init(z);
-  pbc_mpz_from_hash(z, a->field->order, data, len);
-  fp_set_mpz(a, z);
-  mpz_clear(z);
-}
-
-static int fp_cmp(element_ptr a, element_ptr b) {
-  dataptr ad = a->data, bd = b->data;
-  if (!ad->flag) {
-    return bd->flag;
-  } else {
-    fp_field_data_ptr p = a->field->data;
-    return mpn_cmp(ad->d, bd->d, p->limbs);
-    //return memcmp(ad->d, bd->d, p->limbs);
-  }
-}
-
-static int fp_sgn_odd(element_ptr a) {
-  dataptr ad = a->data;
-  if (!ad->flag) return 0;
-  return ad->d[0] & 1 ? 1 : -1;
-}
-
-static int fp_sgn_even(element_ptr a) {
-  fp_field_data_ptr p = a->field->data;
-  dataptr ad = a->data;
-  if (!ad->flag) return 0;
-  mp_limb_t sum[p->limbs];
-
-  int carry = mpn_add_n(sum, ad->d, ad->d, p->limbs);
-  if (carry) return 1;
-  return mpn_cmp(sum, p->primelimbs, p->limbs);
-}
-
-
-static int fp_is_sqr(element_ptr a) {
-  dataptr ad = a->data;
-  int res;
-  mpz_t z;
-  mpz_init(z);
-  //0 is a square
-  if (!ad->flag) return 1;
-  fp_to_mpz(z, a);
-  res = mpz_legendre(z, a->field->order) == 1;
-  mpz_clear(z);
-  return res;
-}
-
-static int fp_to_bytes(unsigned char *data, element_t a) {
-  dataptr ad = a->data;
-  int n = a->field->fixed_length_in_bytes;
-  if (!ad->flag) {
-    memset(data, 0, n);
-  } else {
-    mpz_t z;
-
-    mpz_init(z);
-    fp_to_mpz(z, a);
-    pbc_mpz_out_raw_n(data, n, z);
-    mpz_clear(z);
-  }
-  return n;
-}
-
-static int fp_from_bytes(element_t a, unsigned char *data) {
-  dataptr ad = a->data;
-  int n;
-  mpz_t z;
-
-  mpz_init(z);
-
-  n = a->field->fixed_length_in_bytes;
-  mpz_import(z, n, 1, 1, 1, 0, data);
-  if (!mpz_sgn(z)) ad->flag = 0;
-  else {
-    ad->flag = 2;
-    from_mpz(a, z);
-  }
-  mpz_clear(z);
-  return n;
-}
-
-static void fp_out_info(FILE* str, field_ptr f) {
-  element_fprintf(str, "GF(%Zd): zero flag + mpn", f->order);
-}
-
-static void fp_field_clear(field_t f) {
-  fp_field_data_ptr p = f->data;
-  pbc_free(p->primelimbs);
-  pbc_free(p);
-}
-
-void field_init_faster_fp(field_ptr f, mpz_t prime) {
-  PBC_ASSERT(!mpz_fits_ulong_p(prime), "modulus too small");
-  fp_field_data_ptr p;
-  field_init(f);
-  f->init = fp_init;
-  f->clear = fp_clear;
-  f->set_si = fp_set_si;
-  f->set_mpz = fp_set_mpz;
-  f->out_str = fp_out_str;
-  f->add = fp_add;
-  f->sub = fp_sub;
-  f->set = fp_set;
-  f->mul = fp_mul;
-  f->mul_si = fp_mul_si;
-  f->square = fp_square;
-  f->doub = fp_double;
-  f->halve = fp_halve;
-  f->pow_mpz = fp_pow_mpz;
-  f->neg = fp_neg;
-  f->cmp = fp_cmp;
-  f->sign = mpz_odd_p(prime) ? fp_sgn_odd : fp_sgn_even;
-  f->invert = fp_invert;
-  f->random = fp_random;
-  f->from_hash = fp_from_hash;
-  f->is1 = fp_is1;
-  f->is0 = fp_is0;
-  f->set0 = fp_set0;
-  f->set1 = fp_set1;
-  f->is_sqr = fp_is_sqr;
-  f->sqrt = element_tonelli;
-  f->field_clear = fp_field_clear;
-  f->to_bytes = fp_to_bytes;
-  f->from_bytes = fp_from_bytes;
-  f->to_mpz = fp_to_mpz;
-
-  f->out_info = fp_out_info;
-
-  p = f->data = pbc_malloc(sizeof(fp_field_data_t));
-  p->limbs = mpz_size(prime);
-  p->bytes = p->limbs * sizeof(mp_limb_t);
-  p->primelimbs = pbc_malloc(p->bytes);
-  mpz_export(p->primelimbs, &p->limbs, -1, sizeof(mp_limb_t), 0, 0, prime);
-
-  mpz_set(f->order, prime);
-  f->fixed_length_in_bytes = (mpz_sizeinbase(prime, 2) + 7) / 8;
-}