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| author | Richard Biener <rguenther@suse.de> | 2024-07-16 10:45:27 +0200 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2024-07-16 10:53:17 +0200 |
| commit | 896393791ee34ffc176c87d232dfee735db3aaab (patch) | |
| tree | a6c3998c77836dc61985937d6f5d06fb120e6feb | |
| parent | 75c0bf997d2808561451e62aa6b7ae7c8e32b9e9 (diff) | |
| download | gcc-896393791ee34ffc176c87d232dfee735db3aaab.zip gcc-896393791ee34ffc176c87d232dfee735db3aaab.tar.gz gcc-896393791ee34ffc176c87d232dfee735db3aaab.tar.bz2 | |
Fixup unaligned load/store cost for znver5
Currently unaligned YMM and ZMM load and store costs are cheaper than
aligned which causes the vectorizer to purposely mis-align accesses
by adding an alignment prologue. It looks like the unaligned costs
were simply copied from the bogus znver4 costs. The following makes
the unaligned costs equal to the aligned costs like in the fixed znver4
version.
* config/i386/x86-tune-costs.h (znver5_cost): Update unaligned
load and store cost from the aligned costs.
| -rw-r--r-- | gcc/config/i386/x86-tune-costs.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/config/i386/x86-tune-costs.h b/gcc/config/i386/x86-tune-costs.h index 2ac75c3..769f334 100644 --- a/gcc/config/i386/x86-tune-costs.h +++ b/gcc/config/i386/x86-tune-costs.h @@ -2060,8 +2060,8 @@ struct processor_costs znver5_cost = { in 32bit, 64bit, 128bit, 256bit and 512bit */ {8, 8, 8, 12, 12}, /* cost of storing SSE register in 32bit, 64bit, 128bit, 256bit and 512bit */ - {6, 6, 6, 6, 6}, /* cost of unaligned loads. */ - {8, 8, 8, 8, 8}, /* cost of unaligned stores. */ + {6, 6, 10, 10, 12}, /* cost of unaligned loads. */ + {8, 8, 8, 12, 12}, /* cost of unaligned stores. */ 2, 2, 2, /* cost of moving XMM,YMM,ZMM register. */ 6, /* cost of moving SSE register to integer. */ |