415     || (dn->bits&DECNEG && !ISZERO(dn)));		    /* bad */  in decNumberToUInt32()
1454       if (ISZERO(rhs)) {		/* +/- zeros -> error */  in decNumberLn()
1592       if (ISZERO(rhs)) {		/* +/- zeros -> error */  in decNumberLog10()
1601     if (!(rhs->bits&(DECNEG|DECSPECIAL)) && !ISZERO(rhs)) {  in decNumberLog10()
1647     if (a->bits&DECSPECIAL || ISZERO(a)) {  in decNumberLog10()
2313       if (ISZERO(dac)) {		     /* x==1, 1.0, etc. */  in decNumberPower()
2366 	  if (status&DEC_Overflow || ISZERO(dac)) break;  in decNumberPower()
3027     if (ISZERO(rhs)) {  in decNumberSquareRoot()
3230 	if (!ISZERO(t)) status|=DEC_Inexact|DEC_Rounded; /* not equal */  in decNumberSquareRoot()
3839       if (!ISZERO(dn)) pre+=adj;  in decToString()
4018     if (ISZERO(lhs)) {  in decAddOp()
4030 	if (ISZERO(res)) {		/* both 0: special IEEE 854 rules */  in decAddOp()
4054     if (ISZERO(rhs)) {			/* [lhs is non-zero] */  in decAddOp()
4276     if (ISZERO(res) && diffsign  in decAddOp()
4472     if (ISZERO(rhs)) {			/* x/0 is always exceptional */  in decDivideOp()
4473       if (ISZERO(lhs)) {  in decDivideOp()
4488     if (ISZERO(lhs)) {			/* 0/x [x!=0] */  in decDivideOp()
5058     if (((lhs->bits & DECINF)==0 && ISZERO(lhs))  in decMultiplyOp()
5059       ||((rhs->bits & DECINF)==0 && ISZERO(rhs))) {  in decMultiplyOp()
5424     if (ISZERO(rhs)) {			/* zeros -> exact 1 */  in decExpOp()
5617 	  if (*status&DEC_Overflow || ISZERO(t)) break;}  in decExpOp()
5633     if (ISZERO(a)) residue=0;		/* .. unless underflowed to 0 */  in decExpOp()
5773     if (ISZERO(rhs)) {			/* +/- zeros -> -Infinity */
5945     if (ISZERO(a)) residue=0;		/* .. unless underflowed to 0 */
6048     if (ISZERO(lhs)) {			     /* zero coefficient unchanged */
6087 	if (ISZERO(res) && !set->extended) res->bits=0; /* subset; no -0 */
6324   if (ISZERO(lhs)) result=0;
6326     if (ISZERO(rhs)) return result;	     /* LHS wins or both 0 */
6334     if (ISZERO(rhs)) sigr=0;
6751   if (ISZERO(dn)) {			/* .. or 0 */
7389     if ISZERO(dn) {		   /* value is zero */
7476   if (!ISZERO(dn)) {
7499   if (ISZERO(dn)) {		   /* zero does not overflow magnitude */
7594   if ISZERO(dn) {			/* value is zero */
7640   if (ISZERO(dn)) *status|=DEC_Clamped;
7670      && !ISZERO(rhs)) *status|=DEC_Invalid_operation;
7704   if (ISZERO(dn)) return 0;		/* zeros are OK, with any exponent */