Simplify assignment of Inf for pow Nan (don't worry about the sign).

bmomjian · bmomjian · commit a252994abeeb · 2007-01-04T05:18:39.000Z
diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.139 2007/01/03 22:05:00 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.140 2007/01/04 05:18:39 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1453,7 +1453,8 @@ dpow(PG_FUNCTION_ARGS)
 	if (errno == EDOM && isnan(result))
 	{
 		if ((fabs(arg1) > 1 && arg2 >= 0) || (fabs(arg1) < 1 && arg2 < 0))
-			result = (arg1 >= 0) ? get_float8_infinity() : -get_float8_infinity();
+			/* The sign if Inf is not significant in this case. */
+			result = get_float8_infinity();
 		else if (fabs(arg1) != 1)
 			result = 0;
 		else

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`*`
`9`	`9`	`*`
`10`	`10`	`* IDENTIFICATION`
`11`		`- * $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.139 2007/01/03 22:05:00 momjian Exp $`
	`11`	`+ * $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.140 2007/01/04 05:18:39 momjian Exp $`
`12`	`12`	`*`
`13`	`13`	`*-------------------------------------------------------------------------`
`14`	`14`	`*/`
`@@ -1453,7 +1453,8 @@ dpow(PG_FUNCTION_ARGS)`
`1453`	`1453`	`if (errno == EDOM && isnan(result))`
`1454`	`1454`	`{`
`1455`	`1455`	`if ((fabs(arg1) > 1 && arg2 >= 0) \|\| (fabs(arg1) < 1 && arg2 < 0))`
`1456`		`- result = (arg1 >= 0) ? get_float8_infinity() : -get_float8_infinity();`
	`1456`	`+ /* The sign if Inf is not significant in this case. */`
	`1457`	`+ result = get_float8_infinity();`
`1457`	`1458`	`else if (fabs(arg1) != 1)`
`1458`	`1459`	`result = 0;`
`1459`	`1460`	`else`