llvm-project

Commit Graph

Author	SHA1	Message	Date
James Y Knight	7c905063c5	Make utils/update_llc_test_checks.py note that the assertions are autogenerated. Also update existing test cases which appear to be generated by it and weren't modified (other than addition of the header) by rerunning it. llvm-svn: 253917	2015-11-23 21:33:58 +00:00
Simon Pilgrim	d0448ee59f	[X86][SSE] Vectorize CTTZ + CTTZ_ZERO_UNDEF Now that we have fast vector CTPOP implementations we can use this to speed up vector CTTZ using the pattern (cttz(x) = ctpop((x & -x) - 1)) Additionally, for AVX512CD that provides lzcnt instructions we can use the pattern (cttz_undef(x) = (width - 1) - ctlz(x & -x)) Differential Revision: http://reviews.llvm.org/D12663 llvm-svn: 248091	2015-09-19 13:22:57 +00:00
Simon Pilgrim	5cce4381ab	[X86] Updated vector tzcnt tests. Added vec512 tests. llvm-svn: 246922	2015-09-05 10:19:07 +00:00

Author

SHA1

Message

Date

James Y Knight

7c905063c5

Make utils/update_llc_test_checks.py note that the assertions are

autogenerated.

Also update existing test cases which appear to be generated by it and
weren't modified (other than addition of the header) by rerunning it.

llvm-svn: 253917

2015-11-23 21:33:58 +00:00

Simon Pilgrim

d0448ee59f

[X86][SSE] Vectorize CTTZ + CTTZ_ZERO_UNDEF

Now that we have fast vector CTPOP implementations we can use this to speed up vector CTTZ using the pattern (cttz(x) = ctpop((x & -x) - 1))

Additionally, for AVX512CD that provides lzcnt instructions we can use the pattern (cttz_undef(x) = (width - 1) - ctlz(x & -x))

Differential Revision: http://reviews.llvm.org/D12663

llvm-svn: 248091

2015-09-19 13:22:57 +00:00

Simon Pilgrim

5cce4381ab

[X86] Updated vector tzcnt tests. Added vec512 tests.

llvm-svn: 246922

2015-09-05 10:19:07 +00:00

3 Commits