From: mayshao-oc <mayshao...@zhaoxin.com>
Hi Jakub:
This is backport of the fix for PR target/100758 from mainline to the gcc10
release branch. Because the bug still exists in gcc10 on Zhaoxin platform, and
it will incur ISA feature detection failure, we want to fix it as the
mainline.This patch has been retested against the gcc10 branch on
Intel,Amd,Zhaoxin with make bootstrap and make -k check without failure. Ok for
the gcc10 branch?
BR
Mayshao
libgcc/ChangeLog:
PR target/100758
* config/i386/cpuinfo.c (__cpu_indicator_init): Call
get_available_features
for all CPUs with max_level >= 1, rather than just Intel, AMD.
---
libgcc/config/i386/cpuinfo.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/libgcc/config/i386/cpuinfo.c b/libgcc/config/i386/cpuinfo.c
index 83301a1445f..ad250edbcb7 100644
--- a/libgcc/config/i386/cpuinfo.c
+++ b/libgcc/config/i386/cpuinfo.c
@@ -474,6 +474,9 @@ __cpu_indicator_init (void)
extended_model = (eax >> 12) & 0xf0;
extended_family = (eax >> 20) & 0xff;
+ /* Find available features. */
+ get_available_features (ecx, edx, max_level);
+
if (vendor == signature_INTEL_ebx)
{
/* Adjust model and family for Intel CPUS. */
@@ -487,8 +490,6 @@ __cpu_indicator_init (void)
/* Get CPU type. */
get_intel_cpu (family, model, brand_id);
- /* Find available features. */
- get_available_features (ecx, edx, max_level);
__cpu_model.__cpu_vendor = VENDOR_INTEL;
}
else if (vendor == signature_AMD_ebx)
@@ -502,8 +503,6 @@ __cpu_indicator_init (void)
/* Get CPU type. */
get_amd_cpu (family, model);
- /* Find available features. */
- get_available_features (ecx, edx, max_level);
__cpu_model.__cpu_vendor = VENDOR_AMD;
}
else
--
2.17.1
