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| author | Kelvin Nilsen <kelvin@gcc.gnu.org> | 2020-05-11 15:10:24 -0500 |
|---|---|---|
| committer | Bill Schmidt <wschmidt@linux.ibm.com> | 2020-05-11 15:27:24 -0500 |
| commit | 9acfb58a46ffe88ebaae0eeb341cb924702fe20c (patch) | |
| tree | 5956b34f8ef95abdab04d443874ea8fac25ddb43 /gcc/doc | |
| parent | 52c5933f5838adb7bf6035e648b770b4958d137f (diff) | |
| download | gcc-9acfb58a46ffe88ebaae0eeb341cb924702fe20c.zip gcc-9acfb58a46ffe88ebaae0eeb341cb924702fe20c.tar.gz gcc-9acfb58a46ffe88ebaae0eeb341cb924702fe20c.tar.bz2 | |
rs6000: Add cntlzdm and cnttzdm
Add support for new scalar instructions for counting leading or
trailing zeros under control of a bitmask.
[gcc]
2020-05-11 Kelvin Nilsen <kelvin@gcc.gnu.org>
* config/rs6000/rs6000-builtin.def (__builtin_cntlzdm): New
built-in function definition.
(__builtin_cnttzdm): Likewise.
* config/rs6000/rs6000.md (UNSPEC_CNTLZDM): New constant.
(UNSPEC_CNTTZDM): Likewise.
(cntlzdm): New insn.
(cnttzdm): Likewise.
* doc/extend.texi (Basic PowerPC Built-in Functions available for
a Future Architecture): Add descriptions of __builtin_cntlzdm and
__builtin_cnttzdm functions.
[gcc/testsuite]
2020-05-11 Kelvin Nilsen <kelvin@gcc.gnu.org>
* gcc.target/powerpc/cntlzdm-0.c: New test.
* gcc.target/powerpc/cntlzdm-1.c: New test.
* gcc.target/powerpc/cnttzdm-0.c: New test.
* gcc.target/powerpc/cnttzdm-1.c: New test.
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index f7b30c7..8c833d3 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -17556,6 +17556,22 @@ Perform a 64-bit centrifuge operation, as if implemented by the Future @code{cfuged} instruction. @findex __builtin_cfuged +@smallexample +@exdent unsigned long long int +@exdent __builtin_cntlzdm (unsigned long long int, unsigned long long int) +@end smallexample +Perform a 64-bit count leading zeros operation under mask, as if +implemented by the future @code{cntlzdm} instruction. +@findex __builtin_cntlzdm + +@smallexample +@exdent unsigned long long int +@exdent __builtin_cnttzdm (unsigned long long int, unsigned long long int) +@end smallexample +Perform a 64-bit count trailing zeros operation under mask, as if +implemented by the future @code{cnttzdm} instruction. +@findex __builtin_cnttzdm + @node PowerPC AltiVec/VSX Built-in Functions @subsection PowerPC AltiVec/VSX Built-in Functions |