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| author | Claudiu Zissulescu <claziss@synopsys.com> | 2021-05-10 09:03:41 +0300 |
|---|---|---|
| committer | Claudiu Zissulescu <claziss@synopsys.com> | 2021-05-10 09:32:59 +0300 |
| commit | b70c7c06aaa2ef55a29e6516a710e57f7218ab53 (patch) | |
| tree | 09836b79ef1fd591d55655fe1316008811231af7 /gcc/ada/gcc-interface/utils.c | |
| parent | 3b9eb2f8a8655bf1cc6bf14e732999c877ee4fff (diff) | |
| download | gcc-b70c7c06aaa2ef55a29e6516a710e57f7218ab53.zip gcc-b70c7c06aaa2ef55a29e6516a710e57f7218ab53.tar.gz gcc-b70c7c06aaa2ef55a29e6516a710e57f7218ab53.tar.bz2 | |
arc: Update ctz/clz patterns
ARCv2 ISA introduces special clz/ctz instructions. This patch is
adding support for them when available.
Corner case:
mov r0,0x0 : (w0) r0 <= 0x00000000 *
ffs r1,r0 : (w0) r1 <= 0x0000001f *
fls r2,r0 : (w0) r2 <= 0x00000000 *
gcc/
2021-05-10 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc.h (CLZ_DEFINED_VALUE_AT_ZERO): Define.
(CTZ_DEFINED_VALUE_AT_ZERO): Likewise.
* config/arc/arc.md (clrsbsi2): Cleanup pattern.
(norm_f): Likewise.
(ffs): Likewise.
(ffs_f): Likewise.
(clzsi2): Use fls instruction when available.
(arc_clzsi2): Likewise.
Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>
Diffstat (limited to 'gcc/ada/gcc-interface/utils.c')
0 files changed, 0 insertions, 0 deletions