Make bignums work better when EMACS_INT is larger than long

* lisp/international/ccl.el (ccl-fixnum): New function.
(ccl-embed-data, ccl-embed-current-address, ccl-dump): Use it.
* src/alloc.c (make_number): Handle case where EMACS_INT is
larger than long.
* src/data.c (bignumcompare): Handle case where EMACS_INT is
larger than long.
(arith_driver): Likewise.  Coerce markers.
(float_arith_driver): Coerce markers.
(Flogcount): Use mpz_sgn.
(ash_lsh_impl): Fix bugs.
(Fsub1): Fix underflow check.
* src/lisp.h (NUMBERP): Don't check BIGNUMP.
(CHECK_FIXNUM_OR_FLOAT_COERCE_MARKER): Fix indentation.
* test/lisp/international/ccl-tests.el: New file.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/alloc.c b/src/alloc.c
index 1dc1bbb031a..367bb73fc15 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -3815,6 +3815,34 @@ make_number (mpz_t value)
         }
     }
 
+  /* Check if fixnum can be larger than long.  */
+  if (sizeof (EMACS_INT) > sizeof (long))
+    {
+      size_t bits = mpz_sizeinbase (value, 2);
+      int sign = mpz_sgn (value);
+
+      if (bits < FIXNUM_BITS + (sign < 0))
+        {
+          EMACS_INT v = 0;
+          size_t limbs = mpz_size (value);
+          mp_size_t i;
+
+          for (i = 0; i < limbs; i++)
+            {
+              mp_limb_t limb = mpz_getlimbn (value, i);
+              v |= (EMACS_INT) ((EMACS_UINT) limb << (i * GMP_NUMB_BITS));
+            }
+          if (sign < 0)
+            v = -v;
+
+          if (!FIXNUM_OVERFLOW_P (v))
+            {
+              XSETINT (obj, v);
+              return obj;
+            }
+        }
+    }
+
   obj = allocate_misc (Lisp_Misc_Bignum);
   b = XBIGNUM (obj);
   /* We could mpz_init + mpz_swap here, to avoid a copy, but the