remove register

let the compiler find the best register optimization

bn_fast_mp_montgomery_reduce.c

@@ -42,8 +42,8 @@ int fast_mp_montgomery_reduce (mp_int * x, mp_int * n, mp_digit rho)
    * an array of double precision words W[...]
    */
   {
-    register mp_word *_W;
+    mp_word *_W;
-    register mp_digit *tmpx;
+    mp_digit *tmpx;
 
     /* alias for the W[] array */
     _W   = W;
@@ -72,7 +72,7 @@ int fast_mp_montgomery_reduce (mp_int * x, mp_int * n, mp_digit rho)
      * by casting the value down to a mp_digit.  Note this requires
      * that W[ix-1] have  the carry cleared (see after the inner loop)
      */
-    register mp_digit mu;
+    mp_digit mu;
     mu = (mp_digit) (((W[ix] & MP_MASK) * rho) & MP_MASK);
 
     /* a = a + mu * m * b**i
@@ -90,9 +90,9 @@ int fast_mp_montgomery_reduce (mp_int * x, mp_int * n, mp_digit rho)
      * first m->used words of W[] have the carries fixed
      */
     {
-      register int iy;
+      int iy;
-      register mp_digit *tmpn;
+      mp_digit *tmpn;
-      register mp_word *_W;
+      mp_word *_W;
 
       /* alias for the digits of the modulus */
       tmpn = n->dp;
@@ -115,8 +115,8 @@ int fast_mp_montgomery_reduce (mp_int * x, mp_int * n, mp_digit rho)
    * significant digits we zeroed].
    */
   {
-    register mp_digit *tmpx;
+    mp_digit *tmpx;
-    register mp_word *_W, *_W1;
+    mp_word *_W, *_W1;
 
     /* nox fix rest of carries */
 

bn_fast_s_mp_mul_digs.c

@@ -35,7 +35,7 @@ int fast_s_mp_mul_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
 {
   int     olduse, res, pa, ix, iz;
   mp_digit W[MP_WARRAY];
-  register mp_word  _W;
+  mp_word  _W;
 
   /* grow the destination as required */
   if (c->alloc < digs) {
@@ -85,7 +85,7 @@ int fast_s_mp_mul_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
   c->used = pa;
 
   {
-    register mp_digit *tmpc;
+    mp_digit *tmpc;
     tmpc = c->dp;
     for (ix = 0; ix < (pa + 1); ix++) {
       /* now extract the previous digit [below the carry] */

bn_fast_s_mp_mul_high_digs.c

@@ -75,7 +75,7 @@ int fast_s_mp_mul_high_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
   c->used = pa;
 
   {
-    register mp_digit *tmpc;
+    mp_digit *tmpc;
 
     tmpc = c->dp + digs;
     for (ix = digs; ix < pa; ix++) {

bn_mp_copy.c

@@ -35,7 +35,7 @@ mp_copy (mp_int * a, mp_int * b)
 
   /* zero b and copy the parameters over */
   {
-    register mp_digit *tmpa, *tmpb;
+    mp_digit *tmpa, *tmpb;
 
     /* pointer aliases */
 

bn_mp_div_2.c

@@ -30,7 +30,7 @@ int mp_div_2(mp_int * a, mp_int * b)
   oldused = b->used;
   b->used = a->used;
   {
-    register mp_digit r, rr, *tmpa, *tmpb;
+    mp_digit r, rr, *tmpa, *tmpb;
 
     /* source alias */
     tmpa = a->dp + b->used - 1;

bn_mp_div_2d.c

@@ -58,7 +58,7 @@ int mp_div_2d (mp_int * a, int b, mp_int * c, mp_int * d)
   /* shift any bit count < DIGIT_BIT */
   D = (mp_digit) (b % DIGIT_BIT);
   if (D != 0) {
-    register mp_digit *tmpc, mask, shift;
+    mp_digit *tmpc, mask, shift;
 
     /* mask */
     mask = (((mp_digit)1) << D) - 1;

bn_mp_karatsuba_mul.c

@@ -82,8 +82,8 @@ int mp_karatsuba_mul (mp_int * a, mp_int * b, mp_int * c)
   y1.used = b->used - B;
 
   {
-    register int x;
+    int x;
-    register mp_digit *tmpa, *tmpb, *tmpx, *tmpy;
+    mp_digit *tmpa, *tmpb, *tmpx, *tmpy;
 
     /* we copy the digits directly instead of using higher level functions
      * since we also need to shift the digits

bn_mp_karatsuba_sqr.c

@@ -52,8 +52,8 @@ int mp_karatsuba_sqr (mp_int * a, mp_int * b)
     goto X0X0;
 
   {
-    register int x;
+    int x;
-    register mp_digit *dst, *src;
+    mp_digit *dst, *src;
 
     src = a->dp;
 

bn_mp_lshd.c

@@ -33,7 +33,7 @@ int mp_lshd (mp_int * a, int b)
   }
 
   {
-    register mp_digit *top, *bottom;
+    mp_digit *top, *bottom;
 
     /* increment the used by the shift amount then copy upwards */
     a->used += b;

bn_mp_montgomery_reduce.c

@@ -56,9 +56,9 @@ mp_montgomery_reduce (mp_int * x, mp_int * n, mp_digit rho)
 
     /* a = a + mu * m * b**i */
     {
-      register int iy;
+      int iy;
-      register mp_digit *tmpn, *tmpx, u;
+      mp_digit *tmpn, *tmpx, u;
-      register mp_word r;
+      mp_word r;
 
       /* alias for digits of the modulus */
       tmpn = n->dp;

bn_mp_mul_2.c

@@ -31,7 +31,7 @@ int mp_mul_2(mp_int * a, mp_int * b)
   b->used = a->used;
 
   {
-    register mp_digit r, rr, *tmpa, *tmpb;
+    mp_digit r, rr, *tmpa, *tmpb;
 
     /* alias for source */
     tmpa = a->dp;

bn_mp_mul_2d.c

@@ -44,8 +44,8 @@ int mp_mul_2d (mp_int * a, int b, mp_int * c)
   /* shift any bit count < DIGIT_BIT */
   d = (mp_digit) (b % DIGIT_BIT);
   if (d != 0) {
-    register mp_digit *tmpc, shift, mask, r, rr;
+    mp_digit *tmpc, shift, mask, r, rr;
-    register int x;
+    int x;
 
     /* bitmask for carries */
     mask = (((mp_digit)1) << d) - 1;

bn_mp_rshd.c

@@ -32,7 +32,7 @@ void mp_rshd (mp_int * a, int b)
   }
 
   {
-    register mp_digit *bottom, *top;
+    mp_digit *bottom, *top;
 
     /* shift the digits down */
 

bn_s_mp_add.c

@@ -47,8 +47,8 @@ s_mp_add (mp_int * a, mp_int * b, mp_int * c)
   c->used = max + 1;
 
   {
-    register mp_digit u, *tmpa, *tmpb, *tmpc;
+    mp_digit u, *tmpa, *tmpb, *tmpc;
-    register int i;
+    int i;
 
     /* alias for digit pointers */
 

bn_s_mp_sub.c

@@ -35,8 +35,8 @@ s_mp_sub (mp_int * a, mp_int * b, mp_int * c)
   c->used = max;
 
   {
-    register mp_digit u, *tmpa, *tmpb, *tmpc;
+    mp_digit u, *tmpa, *tmpb, *tmpc;
-    register int i;
+    int i;
 
     /* alias for digit pointers */
     tmpa = a->dp;