speeded up a bit for printing 0.0

diff --git a/lang/cem/libcc/gen/ext_comp.c b/lang/cem/libcc/gen/ext_comp.c
index e990d54..e6b1edc 100644 (file)
--- a/lang/cem/libcc/gen/ext_comp.c
+++ b/lang/cem/libcc/gen/ext_comp.c
@@ -608,18 +608,20 @@ _ext_str_cvt(e, ndigit, decpt, sign, ecvtflag)
                if (pe > &buf[NDIGITS]) pe = &buf[NDIGITS];
        }
        while (p <= pe) {
-               if (e->exp >= 0) {
+               if (e->exp >= 0 && e->m1 != 0) {
                        struct EXTEND x;
 
                        x.m2 = 0; x.exp = e->exp;
                        x.sign = 1;
                        x.m1 = e->m1>>(31-e->exp);
                        *p++ = (x.m1) + '0';
-                       x.m1 = x.m1 << (31-e->exp);
-                       add_ext(e, &x, e);
+                       if (x.m1) {
+                               x.m1 = x.m1 << (31-e->exp);
+                               add_ext(e, &x, e);
+                       }
                }
                else *p++ = '0';
-               mul_ext(e, &ten_powers[1], e);
+               if (e->m1) mul_ext(e, &ten_powers[1], e);
        }
        if (pe >= buf) {
                p = pe;