X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/b817bfc642225b8c3c0b6a7e42d1fb949b61a606..025c5f4aa5ffbf8948482a4233318db81c2df5d2:/mp-arith.c

diff --git a/mp-arith.c b/mp-arith.c
index 736be2f..941b8df 100644
--- a/mp-arith.c
+++ b/mp-arith.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mp-arith.c,v 1.18 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
  *
  * Basic arithmetic on multiprecision integers
  *
@@ -90,7 +90,7 @@ mp *mp_lsr(mp *d, mp *a, size_t n)
 
 mp *mp_lsl2c(mp *d, mp *a, size_t n)
 {
-  if (!(a->f & MP_NEG))
+  if (!MP_NEGP(a))
     return (mp_lsl(d, a, n));
   d = mp_not2c(d, a);
   d = mp_lslc(d, d, n);
@@ -100,7 +100,7 @@ mp *mp_lsl2c(mp *d, mp *a, size_t n)
 
 mp *mp_lsr2c(mp *d, mp *a, size_t n)
 {
-  if (!(a->f & MP_NEG))
+  if (!MP_NEGP(a))
     return (mp_lsr(d, a, n));
   d = mp_not2c(d, a);
   d = mp_lsr(d, d, n);
@@ -135,7 +135,7 @@ int mp_testbit(mp *x, unsigned long n)
 int mp_testbit2c(mp *x, unsigned long n)
 {
   int r;
-  if (!(x->f & MP_NEG))
+  if (!MP_NEGP(x))
     return (mp_testbit(x, n));
   x = mp_not2c(MP_NEW, x);
   r = !mp_testbit(x, n);
@@ -192,7 +192,7 @@ mp *mp_clearbit(mp *d, mp *x, unsigned long n)
 
 mp *mp_setbit2c(mp *d, mp *x, unsigned long n)
 {
-  if (!(x->f & MP_NEG))
+  if (!MP_NEGP(x))
     return mp_setbit(d, x, n);
   d = mp_not2c(d, x);
   d = mp_clearbit(d, d, n);
@@ -202,7 +202,7 @@ mp *mp_setbit2c(mp *d, mp *x, unsigned long n)
 
 mp *mp_clearbit2c(mp *d, mp *x, unsigned long n)
 {
-  if (!(x->f & MP_NEG))
+  if (!MP_NEGP(x))
     return mp_clearbit(d, x, n);
   d = mp_not2c(d, x);
   d = mp_setbit(d, d, n);
@@ -229,9 +229,12 @@ int mp_eq(const mp *a, const mp *b) { return (MP_EQ(a, b)); }
 
 int mp_cmp(const mp *a, const mp *b)
 {
-  if (!((a->f ^ b->f) & MP_NEG))
-    return (mpx_ucmp(a->v, a->vl, b->v, b->vl));
-  else if (a->f & MP_NEG)
+  if (!((a->f ^ b->f) & MP_NEG)) {
+    if (a->f & MP_NEG)
+      return (-mpx_ucmp(a->v, a->vl, b->v, b->vl));
+    else
+      return (mpx_ucmp(a->v, a->vl, b->v, b->vl));
+  } else if (a->f & MP_NEG)
     return (-1);
   else
     return (+1);
@@ -400,12 +403,12 @@ mp *mp_not2c(mp *d, mp *a)
 
   MP_DEST(d, MP_LEN(a) + 1, a->f);
   if (d == a) {
-    if (a->f & MP_NEG)
+    if (MP_NEGP(a))
       MPX_USUBN(d->v, d->vl, 1);
     else
       MPX_UADDN(d->v, d->vl, 1);
   } else {
-    if (a->f & MP_NEG)
+    if (MP_NEGP(a))
       mpx_usub(d->v, d->vl, a->v, a->vl, &one, &one + 1);
     else
       mpx_uadd(d->v, d->vl, a->v, a->vl, &one, &one + 1);
@@ -590,7 +593,7 @@ void mp_div(mp **qq, mp **rr, mp *a, mp *b)
    */
 
   q->f = ((r->f | b->f) & MP_BURN) | ((r->f ^ b->f) & MP_NEG);
-  if (q->f & MP_NEG) {
+  if (MP_NEGP(q)) {
     mpw *v;
     for (v = r->v; v < r->vl; v++) {
       if (*v) {
@@ -723,6 +726,7 @@ RIG(lsr2c, mp_lsr2c)
 RIG(add, mp_add)
 RIG(sub, mp_sub)
 RIG(mul, mp_mul)
+RIG(exp, mp_exp)
 
 #undef RIG
 
@@ -908,6 +912,7 @@ static test_chunk tests[] = {
   { "sub", tsub, { &type_mp, &type_mp, &type_mp, 0 } },
   { "mul", tmul, { &type_mp, &type_mp, &type_mp, 0 } },
   { "div", tdiv, { &type_mp, &type_mp, &type_mp, &type_mp, 0 } },
+  { "exp", texp, { &type_mp, &type_mp, &type_mp, 0 } },
   { "bin2c", tbin, { &type_string, &type_mp, &type_mp, &type_mp, 0 } },
   { "odd", todd, { &type_mp, &type_uint32, &type_mp, 0 } },
   { "neg", tneg, { &type_mp, &type_mp, 0 } },