bc: pull temporary into a register

function                                             old     new   delta
bc_num_ulong                                         103      95      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 685427e58a5283ee54f539cd52860824d96f4fd2..9eafa80e9d496afcc6649ef7aaf70d1310aa6fff 100644 (file)
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -1411,23 +1411,26 @@ static void bc_num_copy(BcNum *d, BcNum *s)
        }
 }
 
-static BcStatus bc_num_ulong(BcNum *n, unsigned long *result)
+static BcStatus bc_num_ulong(BcNum *n, unsigned long *result_p)
 {
        size_t i;
-       unsigned long pow;
+       unsigned long pow, result;
 
        if (n->neg) return bc_error("negative number");
 
-       for (*result = 0, pow = 1, i = n->rdx; i < n->len; ++i) {
+       for (result = 0, pow = 1, i = n->rdx; i < n->len; ++i) {
 
-               unsigned long prev = *result, powprev = pow;
+               unsigned long prev = result, powprev = pow;
 
-               *result += ((unsigned long) n->num[i]) * pow;
+               result += ((unsigned long) n->num[i]) * pow;
                pow *= 10;
 
-               if (*result < prev || pow < powprev)
+               if (result < prev || pow < powprev)
                        return bc_error("overflow");
+               prev = result;
+               powprev = pow;
        }
+       *result_p = result;
 
        return BC_STATUS_SUCCESS;
 }
@@ -5855,7 +5858,6 @@ static BcStatus bc_program_assign(char inst)
        BcStatus s;
        BcResult *left, *right, res;
        BcNum *l = NULL, *r = NULL;
-       unsigned long val, max;
        bool assign = inst == BC_INST_ASSIGN, ib, sc;
 
        s = bc_program_binOpPrep(&left, &l, &right, &r, assign);
@@ -5909,6 +5911,7 @@ static BcStatus bc_program_assign(char inst)
                        "bad obase; must be [2, BC_BASE_MAX]",  //BC_RESULT_OBASE
                };
                size_t *ptr;
+               unsigned long val, max;
 
                s = bc_num_ulong(l, &val);
                if (s)