isl_basic_map_normalize: avoid invalid access on error
[isl.git] / isl_seq.c
blob42e6b63a78f2dcb911913d9a509ec248f812fcc9
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
4 * Use of this software is governed by the MIT license
6 * Written by Sven Verdoolaege, K.U.Leuven, Departement
7 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
8 */
10 #include <isl_ctx_private.h>
11 #include <isl/seq.h>
13 void isl_seq_clr(isl_int *p, unsigned len)
15 int i;
16 for (i = 0; i < len; ++i)
17 isl_int_set_si(p[i], 0);
20 void isl_seq_set_si(isl_int *p, int v, unsigned len)
22 int i;
23 for (i = 0; i < len; ++i)
24 isl_int_set_si(p[i], v);
27 void isl_seq_set(isl_int *p, isl_int v, unsigned len)
29 int i;
30 for (i = 0; i < len; ++i)
31 isl_int_set(p[i], v);
34 void isl_seq_neg(isl_int *dst, isl_int *src, unsigned len)
36 int i;
37 for (i = 0; i < len; ++i)
38 isl_int_neg(dst[i], src[i]);
41 void isl_seq_cpy(isl_int *dst, isl_int *src, unsigned len)
43 int i;
44 for (i = 0; i < len; ++i)
45 isl_int_set(dst[i], src[i]);
48 void isl_seq_submul(isl_int *dst, isl_int f, isl_int *src, unsigned len)
50 int i;
51 for (i = 0; i < len; ++i)
52 isl_int_submul(dst[i], f, src[i]);
55 void isl_seq_addmul(isl_int *dst, isl_int f, isl_int *src, unsigned len)
57 int i;
58 for (i = 0; i < len; ++i)
59 isl_int_addmul(dst[i], f, src[i]);
62 void isl_seq_swp_or_cpy(isl_int *dst, isl_int *src, unsigned len)
64 int i;
65 for (i = 0; i < len; ++i)
66 isl_int_swap_or_set(dst[i], src[i]);
69 void isl_seq_scale(isl_int *dst, isl_int *src, isl_int m, unsigned len)
71 int i;
72 for (i = 0; i < len; ++i)
73 isl_int_mul(dst[i], src[i], m);
76 void isl_seq_scale_down(isl_int *dst, isl_int *src, isl_int m, unsigned len)
78 int i;
79 for (i = 0; i < len; ++i)
80 isl_int_divexact(dst[i], src[i], m);
83 void isl_seq_cdiv_q(isl_int *dst, isl_int *src, isl_int m, unsigned len)
85 int i;
86 for (i = 0; i < len; ++i)
87 isl_int_cdiv_q(dst[i], src[i], m);
90 void isl_seq_fdiv_q(isl_int *dst, isl_int *src, isl_int m, unsigned len)
92 int i;
93 for (i = 0; i < len; ++i)
94 isl_int_fdiv_q(dst[i], src[i], m);
97 void isl_seq_fdiv_r(isl_int *dst, isl_int *src, isl_int m, unsigned len)
99 int i;
100 for (i = 0; i < len; ++i)
101 isl_int_fdiv_r(dst[i], src[i], m);
104 void isl_seq_combine(isl_int *dst, isl_int m1, isl_int *src1,
105 isl_int m2, isl_int *src2, unsigned len)
107 int i;
108 isl_int tmp;
110 isl_int_init(tmp);
111 for (i = 0; i < len; ++i) {
112 isl_int_mul(tmp, m1, src1[i]);
113 isl_int_addmul(tmp, m2, src2[i]);
114 isl_int_set(dst[i], tmp);
116 isl_int_clear(tmp);
120 * Let d = dst[pos] and s = src[pos]
121 * dst is replaced by |s| dst - sgn(s)d src
123 void isl_seq_elim(isl_int *dst, isl_int *src, unsigned pos, unsigned len,
124 isl_int *m)
126 isl_int a;
127 isl_int b;
129 if (isl_int_is_zero(dst[pos]))
130 return;
132 isl_int_init(a);
133 isl_int_init(b);
135 isl_int_gcd(a, src[pos], dst[pos]);
136 isl_int_divexact(b, dst[pos], a);
137 if (isl_int_is_pos(src[pos]))
138 isl_int_neg(b, b);
139 isl_int_divexact(a, src[pos], a);
140 isl_int_abs(a, a);
141 isl_seq_combine(dst, a, dst, b, src, len);
143 if (m)
144 isl_int_mul(*m, *m, a);
146 isl_int_clear(a);
147 isl_int_clear(b);
150 int isl_seq_eq(isl_int *p1, isl_int *p2, unsigned len)
152 int i;
153 for (i = 0; i < len; ++i)
154 if (isl_int_ne(p1[i], p2[i]))
155 return 0;
156 return 1;
159 int isl_seq_cmp(isl_int *p1, isl_int *p2, unsigned len)
161 int i;
162 int cmp;
163 for (i = 0; i < len; ++i)
164 if ((cmp = isl_int_cmp(p1[i], p2[i])) != 0)
165 return cmp;
166 return 0;
169 int isl_seq_is_neg(isl_int *p1, isl_int *p2, unsigned len)
171 int i;
173 for (i = 0; i < len; ++i) {
174 if (isl_int_abs_ne(p1[i], p2[i]))
175 return 0;
176 if (isl_int_is_zero(p1[i]))
177 continue;
178 if (isl_int_eq(p1[i], p2[i]))
179 return 0;
181 return 1;
184 int isl_seq_first_non_zero(isl_int *p, unsigned len)
186 int i;
188 for (i = 0; i < len; ++i)
189 if (!isl_int_is_zero(p[i]))
190 return i;
191 return -1;
194 int isl_seq_last_non_zero(isl_int *p, unsigned len)
196 int i;
198 for (i = len - 1; i >= 0; --i)
199 if (!isl_int_is_zero(p[i]))
200 return i;
201 return -1;
204 void isl_seq_abs_max(isl_int *p, unsigned len, isl_int *max)
206 int i;
208 isl_int_set_si(*max, 0);
210 for (i = 0; i < len; ++i)
211 if (isl_int_abs_gt(p[i], *max))
212 isl_int_abs(*max, p[i]);
215 int isl_seq_abs_min_non_zero(isl_int *p, unsigned len)
217 int i, min = isl_seq_first_non_zero(p, len);
218 if (min < 0)
219 return -1;
220 for (i = min + 1; i < len; ++i) {
221 if (isl_int_is_zero(p[i]))
222 continue;
223 if (isl_int_abs_lt(p[i], p[min]))
224 min = i;
226 return min;
229 void isl_seq_gcd(isl_int *p, unsigned len, isl_int *gcd)
231 int i, min = isl_seq_abs_min_non_zero(p, len);
233 if (min < 0) {
234 isl_int_set_si(*gcd, 0);
235 return;
237 isl_int_abs(*gcd, p[min]);
238 for (i = 0; isl_int_cmp_si(*gcd, 1) > 0 && i < len; ++i) {
239 if (i == min)
240 continue;
241 if (isl_int_is_zero(p[i]))
242 continue;
243 isl_int_gcd(*gcd, *gcd, p[i]);
247 void isl_seq_normalize(struct isl_ctx *ctx, isl_int *p, unsigned len)
249 if (len == 0)
250 return;
251 isl_seq_gcd(p, len, &ctx->normalize_gcd);
252 if (!isl_int_is_zero(ctx->normalize_gcd) &&
253 !isl_int_is_one(ctx->normalize_gcd))
254 isl_seq_scale_down(p, p, ctx->normalize_gcd, len);
257 void isl_seq_lcm(isl_int *p, unsigned len, isl_int *lcm)
259 int i;
261 if (len == 0) {
262 isl_int_set_si(*lcm, 1);
263 return;
265 isl_int_set(*lcm, p[0]);
266 for (i = 1; i < len; ++i)
267 isl_int_lcm(*lcm, *lcm, p[i]);
270 void isl_seq_inner_product(isl_int *p1, isl_int *p2, unsigned len,
271 isl_int *prod)
273 int i;
274 if (len == 0) {
275 isl_int_set_si(*prod, 0);
276 return;
278 isl_int_mul(*prod, p1[0], p2[0]);
279 for (i = 1; i < len; ++i)
280 isl_int_addmul(*prod, p1[i], p2[i]);
283 uint32_t isl_seq_hash(isl_int *p, unsigned len, uint32_t hash)
285 int i;
286 for (i = 0; i < len; ++i) {
287 if (isl_int_is_zero(p[i]))
288 continue;
289 hash *= 16777619;
290 hash ^= (i & 0xFF);
291 hash = isl_int_hash(p[i], hash);
293 return hash;
296 uint32_t isl_seq_get_hash(isl_int *p, unsigned len)
298 uint32_t hash = isl_hash_init();
300 return isl_seq_hash(p, len, hash);
303 uint32_t isl_seq_get_hash_bits(isl_int *p, unsigned len, unsigned bits)
305 uint32_t hash;
307 hash = isl_seq_get_hash(p, len);
308 return isl_hash_bits(hash, bits);
311 void isl_seq_dump(isl_int *p, unsigned len)
313 int i;
315 for (i = 0; i < len; ++i) {
316 if (i)
317 fprintf(stderr, " ");
318 isl_int_print(stderr, p[i], 0);
320 fprintf(stderr, "\n");