[Bug target/82322] New: vec_ceil/vec_floor/vec_round intrincics do not work for gcc 8, need __builtin_s390_vfidb.

["markos at freevec dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82322

            Bug ID: 82322
           Summary: vec_ceil/vec_floor/vec_round intrincics do not work
                    for gcc 8, need __builtin_s390_vfidb.
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: markos at freevec dot org
  Target Milestone: ---
              Host: s390x-ibm-linux-gnu
            Target: s390x-ibm-linux-gnu
             Build: s390x-ibm-linux-gnu

Created attachment 42233
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42233&action=edit
testcase  demonstrating compiler error for vec_round, etc.

When trying to compile the attached source with gcc 8.0.0:

> g++ -mzvector -march=z14 /home/markos/Development/zvectortest.cpp -o /home/markos/Development/zvectortest
In file included from /home/markos/Development/zvectortest.cpp:1:0:
/home/markos/Development/zvectortest.cpp: In function 'Packet2d pround(const
Packet2d&)':
/home/markos/Development/zvectortest.cpp:6:45: error: '__builtin_s390_vfi' was
not declared in this scope
 Packet2d pround(const Packet2d& a) { return vec_round(a); }
                                             ^~~~~~~~~
/home/markos/Development/zvectortest.cpp:6:45: note: suggested alternative:
'__builtin_s390_vfidb'
/home/markos/Development/zvectortest.cpp: In function 'Packet2d pceil(const
Packet2d&)':
/home/markos/Development/zvectortest.cpp:7:45: error: '__builtin_s390_vfi' was
not declared in this scope
 Packet2d pceil(const  Packet2d& a) { return vec_ceil(a); }
                                             ^~~~~~~~
/home/markos/Development/zvectortest.cpp:7:45: note: suggested alternative:
'__builtin_s390_vfidb'
/home/markos/Development/zvectortest.cpp: In function 'Packet2d pfloor(const
Packet2d&)':
/home/markos/Development/zvectortest.cpp:8:45: error: '__builtin_s390_vfi' was
not declared in this scope
 Packet2d pfloor(const Packet2d& a) { return vec_floor(a); }
                                             ^~~~~~~~~
/home/markos/Development/zvectortest.cpp:8:45: note: suggested alternative:
'__builtin_s390_vfidb'

Same result with -march=z13. Works fine with g++-6.

However, it worked with both compilers if I add the code with #ifdef __GNUC__ <
8 and use helper defines using __builtin_s390_vfidb() intrinsic.