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| author | liuhongt <hongtao.liu@intel.com> | 2023-06-14 10:34:32 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2023-06-19 09:34:16 +0800 |
| commit | 58e61a3ab1c13b6d5b07d86a30cf48a46e0345c8 (patch) | |
| tree | ebdefed46a7b070f4fd3b46738090d4f4cca13c3 /gcc/tree-vectorizer.h | |
| parent | 81161d8a2e2ce1afc898e47bfe80dd04eb18f081 (diff) | |
| download | gcc-58e61a3ab1c13b6d5b07d86a30cf48a46e0345c8.zip gcc-58e61a3ab1c13b6d5b07d86a30cf48a46e0345c8.tar.gz gcc-58e61a3ab1c13b6d5b07d86a30cf48a46e0345c8.tar.bz2 | |
Reimplement packuswb/packusdw with UNSPEC_US_TRUNCATE instead of original us_truncate.
packuswb/packusdw does unsigned saturation for signed source, but rtl
us_truncate means does unsigned saturation for unsigned source.
So for value -1, packuswb will produce 0, but us_truncate produces
255. The patch reimplement those related patterns and functions with
UNSPEC_US_TRUNCATE instead of us_truncate.
gcc/ChangeLog:
PR target/110235
* config/i386/i386-expand.cc (ix86_split_mmx_pack): Use
UNSPEC_US_TRUNCATE instead of original us_truncate for
packusdw/packuswb.
* config/i386/mmx.md (mmx_pack<s_trunsuffix>swb): Substitute
with ..
(mmx_packsswb): .. this and ..
(mmx_packuswb): .. this.
(mmx_packusdw): Use UNSPEC_US_TRUNCATE instead of original
us_truncate.
(s_trunsuffix): Removed code iterator.
(any_s_truncate): Ditto.
* config/i386/sse.md (<sse2_avx2>_packuswb<mask_name>): Use
UNSPEC_US_TRUNCATE instead of original us_truncate.
(<sse4_1_avx2>_packusdw<mask_name>): Ditto.
* config/i386/i386.md (UNSPEC_US_TRUNCATE): New unspec_c_enum.
Diffstat (limited to 'gcc/tree-vectorizer.h')
0 files changed, 0 insertions, 0 deletions