[PATCH] RS6000 Add testlsbb by Byte operations

[PATCH] RS6000 Add testlsbb by Byte operations

Add support for new instructions to test LSB by Byte.

2020-07-29  Will Schmidt  <will_schmidt@vnet.ibm.com>

gcc/ChangeLog:

	* config/rs6000/altivec.h (vec_test_lsbb_all_ones): New define.
	(vec_test_lsbb_all_zeros): New define.
	* config/rs6000/rs6000-builtin.def (BU_P10_VSX_1): New built-in
	handling macro.
	(XVTLSBB_ZEROS, XVTLSBB_ONES): New builtin defines.
	(xvtlsbb_all_zeros, xvtlsbb_all_ones): New builtin overloads.
	* config/rs6000/rs6000-call.c (P10_BUILTIN_VEC_XVTLSBB_ZEROS,
	P10_BUILTIN_VEC_XVTLSBB_ONES): New altivec_builtin_types entries.
	* config/rs6000/rs6000.md (UNSPEC_XVTLSBB):  New unspec.
	* config/rs6000/vsx.md (*xvtlsbb_internal): New instruction define.
	(xvtlsbbo, xvtlsbbz): New instruction expands.

gcc/testsuite/ChangeLog:

	* gcc.target/powerpc/lsbb-runnable.c: New test.
	* gcc.target/powerpc/lsbb.c: New test.