445     || (dn->bits&DECNEG && !ISZERO(dn)));                   /* bad  */  in uprv_decNumberToUInt32()
1315       if (ISZERO(rhs)) {                /* +/- zeros -> error  */  in uprv_decNumberLn()
1457       if (ISZERO(rhs)) {                /* +/- zeros -> error  */  in uprv_decNumberLog10()
1466     if (!(rhs->bits&(DECNEG|DECSPECIAL)) && !ISZERO(rhs)) {  in uprv_decNumberLog10()
1512     if (a->bits&DECSPECIAL || ISZERO(a)) {  in uprv_decNumberLog10()
2182       if (ISZERO(dac)) {                     /* x==1, 1.0, etc.  */  in uprv_decNumberPower()
2235           if (status&DEC_Overflow || ISZERO(dac)) break;  in uprv_decNumberPower()
2901     if (ISZERO(rhs)) {  in uprv_decNumberSquareRoot()
3105         if (!ISZERO(t)) status|=DEC_Inexact|DEC_Rounded; /* not equal  */  in uprv_decNumberSquareRoot()
3725       if (!ISZERO(dn)) pre+=adj;  in decToString()
3904     if (ISZERO(lhs)) {  in decAddOp()
3916         if (ISZERO(res)) {              /* both 0: special IEEE 754 rules  */  in decAddOp()
3940     if (ISZERO(rhs)) {                  /* [lhs is non-zero]  */  in decAddOp()
4164     if (ISZERO(res) && diffsign  in decAddOp()
4360     if (ISZERO(rhs)) {                  /* x/0 is always exceptional  */  in decDivideOp()
4361       if (ISZERO(lhs)) {  in decDivideOp()
4376     if (ISZERO(lhs)) {                  /* 0/x [x!=0]  */  in decDivideOp()
4946     if (((lhs->bits & DECINF)==0 && ISZERO(lhs))  in decMultiplyOp()
4947       ||((rhs->bits & DECINF)==0 && ISZERO(rhs))) {  in decMultiplyOp()
5316     if (ISZERO(rhs)) {                  /* zeros -> exact 1  */  in decExpOp()
5509           if (*status&DEC_Overflow || ISZERO(t)) break;}  in decExpOp()
5525     if (ISZERO(a)) residue=0;           /* .. unless underflowed to 0  */  in decExpOp()
5668     if (ISZERO(rhs)) {                  /* +/- zeros -> -Infinity  */
5840     if (ISZERO(a)) residue=0;           /* .. unless underflowed to 0  */
5946     if (ISZERO(lhs)) {                       /* zero coefficient unchanged  */
5985         if (ISZERO(res) && !set->extended) res->bits=0; /* subset; no -0  */
6222   if (ISZERO(lhs)) result=0;
6224     if (ISZERO(rhs)) return result;          /* LHS wins or both 0  */
6232     if (ISZERO(rhs)) sigr=0;
6650   if (ISZERO(dn)) {                     /* .. or 0  */
7289     if ISZERO(dn) {                /* value is zero  */
7376   if (!ISZERO(dn)) {
7399   if (ISZERO(dn)) {                /* zero does not overflow magnitude  */
7494   if ISZERO(dn) {                       /* value is zero  */
7540   if (ISZERO(dn)) *status|=DEC_Clamped;
7570      && !ISZERO(rhs)) *status|=DEC_Invalid_operation;
7604   if (ISZERO(dn)) return 0;             /* zeros are OK, with any exponent  */