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| author | wwwhhhyyy <hongyu.wang@intel.com> | 2021-08-30 16:41:41 +0800 |
|---|---|---|
| committer | Hongyu Wang <hongyu.wang@intel.com> | 2022-01-16 12:43:02 +0800 |
| commit | 1c2575586c47f56a2e75f734af42371579516f0c (patch) | |
| tree | 00cfab3267531feb8987b3cec759731030662d9d /gcc/tree-ssa-phiopt.c | |
| parent | 9248ee41478754b46b70f2409b85d9743ece9e72 (diff) | |
| download | gcc-1c2575586c47f56a2e75f734af42371579516f0c.zip gcc-1c2575586c47f56a2e75f734af42371579516f0c.tar.gz gcc-1c2575586c47f56a2e75f734af42371579516f0c.tar.bz2 | |
[i386] GLC tuning: Break false dependency for dest register.
For GoldenCove micro-architecture, force insert zero-idiom in asm
template to break false dependency of dest register for several insns.
The related insns are:
VPERM/D/Q/PS/PD
VRANGEPD/PS/SD/SS
VGETMANTSS/SD/SH
VGETMANDPS/PD - mem version only
VPMULLQ
VFMULCSH/PH
VFCMULCSH/PH
gcc/ChangeLog:
* config/i386/i386.h (TARGET_DEST_FALSE_DEP_FOR_GLC): New macro.
* config/i386/sse.md (<avx512>_<complexopname>_<mode><maskc_name><round_name>):
Insert zero-idiom in output template when attr enabled, set new attribute to
true for non-mask/maskz insn.
(avx512fp16_<complexopname>sh_v8hf<mask_scalarc_name><round_scalarcz_name>):
Likewise.
(avx512dq_mul<mode>3<mask_name>): Likewise.
(<avx2_avx512>_permvar<mode><mask_name>): Likewise.
(avx2_perm<mode>_1<mask_name>): Likewise.
(avx512f_perm<mode>_1<mask_name>): Likewise.
(avx512dq_rangep<mode><mask_name><round_saeonly_name>): Likewise.
(avx512dq_ranges<mode><mask_scalar_name><round_saeonly_scalar_name>):
Likewise.
(<avx512>_getmant<mode><mask_name><round_saeonly_name>): Likewise.
(avx512f_vgetmant<mode><mask_scalar_name><round_saeonly_scalar_name>):
Likewise.
* config/i386/subst.md (mask3_dest_false_dep_for_glc_cond): New
subst_attr.
(mask4_dest_false_dep_for_glc_cond): Likewise.
(mask6_dest_false_dep_for_glc_cond): Likewise.
(mask10_dest_false_dep_for_glc_cond): Likewise.
(maskc_dest_false_dep_for_glc_cond): Likewise.
(mask_scalar4_dest_false_dep_for_glc_cond): Likewise.
(mask_scalarc_dest_false_dep_for_glc_cond): Likewise.
* config/i386/x86-tune.def (X86_TUNE_DEST_FALSE_DEP_FOR_GLC): New
DEF_TUNE enabled for m_SAPPHIRERAPIDS and m_ALDERLAKE
gcc/testsuite/ChangeLog:
* gcc.target/i386/avx2-dest-false-dep-for-glc.c: New test.
* gcc.target/i386/avx512dq-dest-false-dep-for-glc.c: Ditto.
* gcc.target/i386/avx512f-dest-false-dep-for-glc.c: Ditto.
* gcc.target/i386/avx512fp16-dest-false-dep-for-glc.c: Ditto.
* gcc.target/i386/avx512fp16vl-dest-false-dep-for-glc.c: Ditto.
* gcc.target/i386/avx512vl-dest-false-dep-for-glc.c: Ditto.
Diffstat (limited to 'gcc/tree-ssa-phiopt.c')
0 files changed, 0 insertions, 0 deletions