S/390: arch13: vec_reve element order reversal builtins

S/390: arch13: vec_reve element order reversal builtins

gcc/ChangeLog:

2019-04-02  Andreas Krebbel  <krebbel@linux.ibm.com>

	* config/s390/s390-builtin-types.def: Add new builtin function type.
	* config/s390/s390-builtins.def: Add overloaded builtin
	s390_vec_reve and low-level builtins for s390_vler and s390_vster.
	* config/s390/s390.md (UNSPEC_VEC_ELTSWAP): New constant definition.
	* config/s390/vecintrin.h (vec_reve): New builtin name definition.
	* config/s390/vx-builtins.md (V_HW_HSD): New mode iterator.
	("eltswap<mode>"): New expander.
	("*eltswapv16qi", "*eltswap<mode>", "*eltswap<mode>_emu"): New
	insn definitions.

gcc/testsuite/ChangeLog:

2019-04-02  Andreas Krebbel  <krebbel@linux.ibm.com>

	* gcc.target/s390/zvector/vec-reve-load-byte-z14.c: New test.
	* gcc.target/s390/zvector/vec-reve-load-byte.c: New test.
	* gcc.target/s390/zvector/vec-reve-load-halfword-z14.c: New test.
	* gcc.target/s390/zvector/vec-reve-load-halfword.c: New test.
	* gcc.target/s390/zvector/vec-reve-store-byte-z14.c: New test.
	* gcc.target/s390/zvector/vec-reve-store-byte.c: New test.

From-SVN: r270085