isl_tab: optionally keep track of row signs

[platform/upstream/isl.git] / isl_seq.c

diff --git a/isl_seq.c b/isl_seq.c
index 5b2f174..73af52d 100644 (file)
--- a/isl_seq.c
+++ b/isl_seq.c
@@ -21,6 +21,13 @@ void isl_seq_cpy(isl_int *dst, isl_int *src, unsigned len)
                isl_int_set(dst[i], src[i]);
 }
 
+void isl_seq_submul(isl_int *dst, isl_int f, isl_int *src, unsigned len)
+{
+       int i;
+       for (i = 0; i < len; ++i)
+               isl_int_submul(dst[i], f, src[i]);
+}
+
 void isl_seq_swp_or_cpy(isl_int *dst, isl_int *src, unsigned len)
 {
        int i;
@@ -42,6 +49,27 @@ void isl_seq_scale_down(isl_int *dst, isl_int *src, isl_int m, unsigned len)
                isl_int_divexact(dst[i], src[i], m);
 }
 
+void isl_seq_cdiv_q(isl_int *dst, isl_int *src, isl_int m, unsigned len)
+{
+       int i;
+       for (i = 0; i < len; ++i)
+               isl_int_cdiv_q(dst[i], src[i], m);
+}
+
+void isl_seq_fdiv_q(isl_int *dst, isl_int *src, isl_int m, unsigned len)
+{
+       int i;
+       for (i = 0; i < len; ++i)
+               isl_int_fdiv_q(dst[i], src[i], m);
+}
+
+void isl_seq_fdiv_r(isl_int *dst, isl_int *src, isl_int m, unsigned len)
+{
+       int i;
+       for (i = 0; i < len; ++i)
+               isl_int_fdiv_r(dst[i], src[i], m);
+}
+
 void isl_seq_combine(isl_int *dst, isl_int m1, isl_int *src1,
                        isl_int m2, isl_int *src2, unsigned len)
 {
@@ -132,6 +160,16 @@ int isl_seq_first_non_zero(isl_int *p, unsigned len)
        return -1;
 }
 
+int isl_seq_last_non_zero(isl_int *p, unsigned len)
+{
+       int i;
+
+       for (i = len - 1; i >= 0; --i)
+               if (!isl_int_is_zero(p[i]))
+                       return i;
+       return -1;
+}
+
 int isl_seq_abs_min_non_zero(isl_int *p, unsigned len)
 {
        int i, min = isl_seq_first_non_zero(p, len);
@@ -164,6 +202,32 @@ void isl_seq_gcd(isl_int *p, unsigned len, isl_int *gcd)
        }
 }
 
+void isl_seq_normalize(isl_int *p, unsigned len)
+{
+       isl_int gcd;
+
+       if (len == 0)
+               return;
+       isl_int_init(gcd);
+       isl_seq_gcd(p, len, &gcd);
+       if (!isl_int_is_zero(gcd))
+               isl_seq_scale_down(p, p, gcd, len);
+       isl_int_clear(gcd);
+}
+
+void isl_seq_lcm(isl_int *p, unsigned len, isl_int *lcm)
+{
+       int i;
+
+       if (len == 0) {
+               isl_int_set_si(*lcm, 1);
+               return;
+       }
+       isl_int_set(*lcm, p[0]);
+       for (i = 1; i < len; ++i)
+               isl_int_lcm(*lcm, *lcm, p[i]);
+}
+
 void isl_seq_inner_product(isl_int *p1, isl_int *p2, unsigned len,
                           isl_int *prod)
 {
@@ -177,11 +241,9 @@ void isl_seq_inner_product(isl_int *p1, isl_int *p2, unsigned len,
                isl_int_addmul(*prod, p1[i], p2[i]);
 }
 
-uint32_t isl_seq_hash(isl_int *p, unsigned len, unsigned bits)
+uint32_t isl_seq_hash(isl_int *p, unsigned len, uint32_t hash)
 {
        int i;
-       uint32_t hash = 2166136261u;
-
        for (i = 0; i < len; ++i) {
                if (isl_int_is_zero(p[i]))
                        continue;
@@ -189,9 +251,20 @@ uint32_t isl_seq_hash(isl_int *p, unsigned len, unsigned bits)
                hash ^= (i & 0xFF);
                hash = isl_int_hash(p[i], hash);
        }
-       if (bits == 32)
-               return hash;
-       if (bits >= 16)
-               return (hash >> bits) ^ (hash & (((uint32_t)1 << bits) - 1));
-       return ((hash >> bits) ^ hash) & (((uint32_t)1 << bits) - 1);
+       return hash;
+}
+
+uint32_t isl_seq_get_hash(isl_int *p, unsigned len)
+{
+       uint32_t hash = isl_hash_init();
+
+       return isl_seq_hash(p, len, hash);
+}
+
+uint32_t isl_seq_get_hash_bits(isl_int *p, unsigned len, unsigned bits)
+{
+       uint32_t hash;
+
+       hash = isl_seq_get_hash(p, len);
+       return isl_hash_bits(hash, bits);
 }