Hi all,
There are several changes for features enabled on cpus. r16-1666 disabled
CLDEMOTE on clients. r16-2224 removed Key locker since Panther Lake and
Clearwater forest. r16-4436 disabled PREFETCHI on Panther Lake.
The patches caused the current return guess value not aligned for
host_detect_local_cpu meeting the unknown model number. Correct the
logic according to the features enabled.
Ok for trunk and backport to GCC14/15?
Thx,
Haochen
gcc/ChangeLog:
* config/i386/driver-i386.cc (host_detect_local_cpu): Correct
the logic for unknown model number cpu guess value.
---
gcc/config/i386/driver-i386.cc | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/gcc/config/i386/driver-i386.cc b/gcc/config/i386/driver-i386.cc
index fe71f550075..3eacc2cbc39 100644
--- a/gcc/config/i386/driver-i386.cc
+++ b/gcc/config/i386/driver-i386.cc
@@ -639,18 +639,24 @@ const char *host_detect_local_cpu (int argc, const char
**argv)
}
else if (has_feature (FEATURE_AVX))
{
- /* Assume Panther Lake. */
- if (has_feature (FEATURE_PREFETCHI))
- cpu = "pantherlake";
/* Assume Clearwater Forest. */
- else if (has_feature (FEATURE_USER_MSR))
+ if (has_feature (FEATURE_USER_MSR))
cpu = "clearwaterforest";
- /* Assume Arrow Lake S. */
else if (has_feature (FEATURE_SM3))
- cpu = "arrowlake-s";
+ {
+ if (has_feature (FEATURE_KL))
+ /* Assume Arrow Lake S. */
+ cpu = "arrowlake-s";
+ else
+ /* Assume Panther Lake. */
+ cpu = "pantherlake";
+ }
/* Assume Sierra Forest. */
- else if (has_feature (FEATURE_AVXVNNIINT8))
+ else if (has_feature (FEATURE_CLDEMOTE))
cpu = "sierraforest";
+ /* Assume Arrow Lake. */
+ else if (has_feature (FEATURE_AVXVNNIINT8))
+ cpu = "arrowlake";
/* Assume Alder Lake. */
else if (has_feature (FEATURE_SERIALIZE))
cpu = "alderlake";
--
2.31.1
