* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/int8.c,v 1.66 2007/06/05 21:31:06 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/int8.c,v 1.67 2007/08/30 05:27:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
* Since the division is likely much more expensive than the actual
* multiplication, we'd like to skip it where possible. The best bang for
* the buck seems to be to check whether both inputs are in the int32
- * range; if so, no overflow is possible.
+ * range; if so, no overflow is possible. (But that only works if we
+ * really have a 64-bit int64 datatype...)
*/
- if (!(arg1 == (int64) ((int32) arg1) &&
- arg2 == (int64) ((int32) arg2)) &&
- arg2 != 0 &&
- (result / arg2 != arg1 || (arg2 == -1 && arg1 < 0 && result < 0)))
- ereport(ERROR,
- (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
- errmsg("bigint out of range")));
+#ifndef INT64_IS_BUSTED
+ if (arg1 != (int64) ((int32) arg1) || arg2 != (int64) ((int32) arg2))
+#endif
+ {
+ if (arg2 != 0 &&
+ (result / arg2 != arg1 || (arg2 == -1 && arg1 < 0 && result < 0)))
+ ereport(ERROR,
+ (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+ errmsg("bigint out of range")));
+ }
PG_RETURN_INT64(result);
}