glibc/SOURCES/glibc-rh1817513-53.patch

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2021-04-23 04:11:25 +00:00
commit 32ac0b988466785d6e3cc1dffc364bb26fc63193
Author: mayshao <mayshao-oc@zhaoxin.com>
Date: Fri Apr 24 12:55:38 2020 +0800
x86: Add CPU Vendor ID detection support for Zhaoxin processors
To recognize Zhaoxin CPU Vendor ID, add a new architecture type
arch_kind_zhaoxin for Vendor Zhaoxin detection.
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index ade37a9bb3de86cc..c432d646ce6806a6 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -464,6 +464,60 @@ init_cpu_features (struct cpu_features *cpu_features)
}
}
}
+ /* This spells out "CentaurHauls" or " Shanghai ". */
+ else if ((ebx == 0x746e6543 && ecx == 0x736c7561 && edx == 0x48727561)
+ || (ebx == 0x68532020 && ecx == 0x20206961 && edx == 0x68676e61))
+ {
+ unsigned int extended_model, stepping;
+
+ kind = arch_kind_zhaoxin;
+
+ get_common_indices (cpu_features, &family, &model, &extended_model,
+ &stepping);
+
+ get_extended_indices (cpu_features);
+
+ model += extended_model;
+ if (family == 0x6)
+ {
+ if (model == 0xf || model == 0x19)
+ {
+ cpu_features->feature[index_arch_AVX_Usable]
+ &= (~bit_arch_AVX_Usable
+ & ~bit_arch_AVX2_Usable);
+
+ cpu_features->feature[index_arch_Slow_SSE4_2]
+ |= (bit_arch_Slow_SSE4_2);
+
+ cpu_features->feature[index_arch_AVX_Fast_Unaligned_Load]
+ &= ~bit_arch_AVX_Fast_Unaligned_Load;
+ }
+ }
+ else if (family == 0x7)
+ {
+ if (model == 0x1b)
+ {
+ cpu_features->feature[index_arch_AVX_Usable]
+ &= (~bit_arch_AVX_Usable
+ & ~bit_arch_AVX2_Usable);
+
+ cpu_features->feature[index_arch_Slow_SSE4_2]
+ |= bit_arch_Slow_SSE4_2;
+
+ cpu_features->feature[index_arch_AVX_Fast_Unaligned_Load]
+ &= ~bit_arch_AVX_Fast_Unaligned_Load;
+ }
+ else if (model == 0x3b)
+ {
+ cpu_features->feature[index_arch_AVX_Usable]
+ &= (~bit_arch_AVX_Usable
+ & ~bit_arch_AVX2_Usable);
+
+ cpu_features->feature[index_arch_AVX_Fast_Unaligned_Load]
+ &= ~bit_arch_AVX_Fast_Unaligned_Load;
+ }
+ }
+ }
else
{
kind = arch_kind_other;
diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h
index 4917182e99a8ee90..388172a1c07bf979 100644
--- a/sysdeps/x86/cpu-features.h
+++ b/sysdeps/x86/cpu-features.h
@@ -53,6 +53,7 @@ enum cpu_features_kind
arch_kind_unknown = 0,
arch_kind_intel,
arch_kind_amd,
+ arch_kind_zhaoxin,
arch_kind_other
};