Blind try to fix portability issue in commit 8f93bd851 et al.

The S/390 members of the buildfarm are showing failures indicating
that they're having trouble with the rint() calls I added yesterday.
There's no good reason for that, and I wonder if it is a compiler bug
similar to the one we worked around in d9476b838.  Try to fix it using
the same method as before, namely to store the result of rint() back
into a "double" variable rather than immediately converting to int64.
(This isn't entirely waving a dead chicken, since on machines with
wider-than-double float registers, the extra store forces a width
conversion.  I don't know if S/390 is like that, but it seems worth
trying.)

In passing, merge duplicate ereport() calls in float8_timestamptz().

Per buildfarm.

diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index 81b76314de924ce2cc29f4075b6b68bedd8b02b0..9b4c012a63c4dc937c1c4c260560744a6ba69810 100644 (file)
--- a/src/backend/utils/adt/timestamp.c
+++ b/src/backend/utils/adt/timestamp.c
@@ -773,12 +773,8 @@ float8_timestamptz(PG_FUNCTION_ARGS)
        {
                /* Out of range? */
                if (seconds <
-                       (float8) SECS_PER_DAY * (DATETIME_MIN_JULIAN - UNIX_EPOCH_JDATE))
-                       ereport(ERROR,
-                                       (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
-                                        errmsg("timestamp out of range: \"%g\"", seconds)));
-
-               if (seconds >=
+                       (float8) SECS_PER_DAY * (DATETIME_MIN_JULIAN - UNIX_EPOCH_JDATE)
+                       || seconds >=
                        (float8) SECS_PER_DAY * (TIMESTAMP_END_JULIAN - UNIX_EPOCH_JDATE))
                        ereport(ERROR,
                                        (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
@@ -788,7 +784,8 @@ float8_timestamptz(PG_FUNCTION_ARGS)
                seconds -= ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY);
 
 #ifdef HAVE_INT64_TIMESTAMP
-               result = rint(seconds * USECS_PER_SEC);
+               seconds = rint(seconds * USECS_PER_SEC);
+               result = (int64) seconds;
 #else
                result = seconds;
 #endif
@@ -1624,9 +1621,10 @@ make_interval(PG_FUNCTION_ARGS)
        result->day = weeks * 7 + days;
 
 #ifdef HAVE_INT64_TIMESTAMP
+       secs = rint(secs * USECS_PER_SEC);
        result->time = hours * ((int64) SECS_PER_HOUR * USECS_PER_SEC) +
                mins * ((int64) SECS_PER_MINUTE * USECS_PER_SEC) +
-               (int64) rint(secs * USECS_PER_SEC);
+               (int64) secs;
 #else
        result->time = hours * (double) SECS_PER_HOUR +
                mins * (double) SECS_PER_MINUTE +