some minor improvements

modules/src/flt_arith/flt_ar2flt.c

@@ -16,20 +16,19 @@ flt_arith2flt(n, e)
 	*/
 	register int i;
 
-	if (n == 0) {
-		e->flt_exp = 0;
-		e->flt_sign = 0;
-		e->m1 = e->m2 = 0;
-		return;
-	}
 	if (n < 0) {
 		e->flt_sign = 1;
 		n = -n;
 	}
 	else	e->flt_sign = 0;
-	e->flt_exp = 63;
 	e->m1 = e->m2 = 0;
+	if (n == 0) {
+		e->flt_exp = 0;
+		return;
+	}
+	e->flt_exp = 63;
 	if (n < 0) {
+		/* n = MINARITH */
 		n = 0x40000000;
 		while ((n << 1) > 0) n <<= 1;
 		e->flt_exp++;

modules/src/flt_arith/flt_chk.c

@@ -16,13 +16,12 @@ flt_chk(e)
 		flt_status = FLT_OVFL;
 		e->flt_exp = EXT_MAX;
 		e->m1 = 0x80000000;
-		e->m2 = 0;
 	}
 	if (e->flt_exp <= EXT_MIN) {
 		flt_status = FLT_UNFL;
 		e->flt_exp = 0;
 		e->m1 = 0;
-		e->m2 = 0;
 		e->flt_sign = 0;
 	}
+	e->m2 = 0;
 }

modules/src/flt_arith/flt_cmp.c

@@ -14,8 +14,8 @@ flt_cmp(e1, e2)
 	int sign;
 	int tmp;
 
-	if (e1->flt_exp == 0 && e1->m1 == 0 && e1->m2 == 0 &&
-	    e2->flt_exp == 0 && e2->m1 == 0 && e2->m2 == 0) {
+	if (e1->m1 == 0 && e1->m2 == 0 &&
+	    e2->m1 == 0 && e2->m2 == 0) {
 		return 0;
 	}
 	sign = e1->flt_sign ? -1 : 1;

modules/src/flt_arith/flt_div.c

@@ -51,6 +51,7 @@ flt_div(e1,e2,e3)
 	 */
 	for (j = 0; j <= 3; j++, u_p++) {
 		long q_est, temp;
+		long v1 = v[1];
 
 		if (j == 2) lp++;
 		if (u_p[0] == 0 && u_p[1] < v[1]) continue;
@@ -62,22 +63,22 @@ flt_div(e1,e2,e3)
 			q_est = temp;
 		}
 		else if (temp >= 0) {
-			q_est = temp / (long)v[1];
+			q_est = temp / v1;
 		}
 		else {
 			long rem;
-			q_est = (0x7FFFFFFF/(long)v[1])+((temp&0x7FFFFFFF)/(long)v[1]);
-			rem = (0x7FFFFFFF%(long)v[1])+((temp&0x7FFFFFFF)%(long)v[1])+1;
-			while (rem > (long)v[1]) {
+			q_est = (0x7FFFFFFF/v1)+((temp&0x7FFFFFFF)/v1);
+			rem = (0x7FFFFFFF%v1)+((temp&0x7FFFFFFF)%v1)+1;
+			while (rem > v1) {
 				q_est++;
-				rem -= v[1];
+				rem -= v1;
 			}
 		}
-		temp -= q_est * (long)v[1];
+		temp -= q_est * v1;
 		while (!(temp&0xFFFF0000) &&
 		       ucmp((long)v[2]*q_est,(temp<<16)+(long)u_p[2]) > 0) {
 			q_est--;
-			temp += v[1];
+			temp += v1;
 		}
 		/*	Now, according to Knuth, we have an estimate of the
 			quotient, that is either correct or one too big, but
@@ -97,14 +98,14 @@ flt_div(e1,e2,e3)
 				k = (tmp >> 16) & 0xFFFF;
 			}
 			k += borrow;
-			borrow = u_p[0] < k;
+			borrow = (long)u_p[0] < k;
 			u_p[0] -= k;
 
 			if (borrow) {
 				/* So, this does not happen often; the estimate
 				   was one too big; correct this
 				*/
-				*lp |= (j & 1) ? (q_est - 1) : ((q_est-1)<<16);
+				q_est--;
 				borrow = 0;
 				for (i = maxv; i > 0; i--) {
 					long tmp 
@@ -115,7 +116,7 @@ flt_div(e1,e2,e3)
 				}
 				u_p[0] += borrow;
 			}
-			else *lp |= (j & 1) ? q_est : (q_est<<16);
+			*lp |= (j & 1) ? q_est : (q_est<<16);
 		}
 	}
 	e3->m1 = result[0];

modules/src/flt_arith/flt_str2fl.c

@@ -208,8 +208,6 @@ add_exponent(e, exp)
 	while (divsz >= BIGSZ) {
 		flt_mul(&x, neg ? &r_big_10pow[BIGSZ-1] : &big_10pow[BIGSZ-1],&x);
 		divsz -= BIGSZ-1;
-		flt_chk(e);
-		if (flt_status != 0) return;
 	}
 	flt_mul(&x, (neg ? r_big_10pow : big_10pow) + divsz, e);
 }