aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/x86_64/cacheinfo.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/x86_64/cacheinfo.c')
-rw-r--r--sysdeps/x86_64/cacheinfo.c32
1 files changed, 28 insertions, 4 deletions
diff --git a/sysdeps/x86_64/cacheinfo.c b/sysdeps/x86_64/cacheinfo.c
index a7e3fc7633..8769e9c966 100644
--- a/sysdeps/x86_64/cacheinfo.c
+++ b/sysdeps/x86_64/cacheinfo.c
@@ -23,6 +23,10 @@
#include <stdlib.h>
#include <unistd.h>
+#ifdef USE_MULTIARCH
+# include "multiarch/init-arch.h"
+#endif
+
static const struct intel_02_cache_info
{
unsigned int idx;
@@ -443,19 +447,32 @@ init_cacheinfo (void)
unsigned int ebx;
unsigned int ecx;
unsigned int edx;
- int max_cpuid;
int max_cpuid_ex;
long int data = -1;
long int shared = -1;
unsigned int level;
unsigned int threads = 0;
+#ifdef USE_MULTIARCH
+ if (__cpu_features.kind == arch_kind_unknown)
+ __init_cpu_features ();
+# define is_intel __cpu_features.kind == arch_kind_intel
+# define is_amd __cpu_features.kind == arch_kind_amd
+# define max_cpuid __cpu_features.max_cpuid
+#else
+ int max_cpuid;
asm volatile ("cpuid"
: "=a" (max_cpuid), "=b" (ebx), "=c" (ecx), "=d" (edx)
: "0" (0));
-
/* This spells out "GenuineIntel". */
- if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
+# define is_intel \
+ ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69
+ /* This spells out "AuthenticAMD". */
+# define is_amd \
+ ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65
+#endif
+
+ if (is_intel)
{
data = handle_intel (_SC_LEVEL1_DCACHE_SIZE, max_cpuid);
@@ -470,9 +487,16 @@ init_cacheinfo (void)
shared = handle_intel (_SC_LEVEL2_CACHE_SIZE, max_cpuid);
}
+#ifdef USE_MULTIARCH
+ eax = __cpu_features.cpuid[INTEL_CPUID_INDEX_1].eax;
+ ebx = __cpu_features.cpuid[INTEL_CPUID_INDEX_1].ebx;
+ ecx = __cpu_features.cpuid[INTEL_CPUID_INDEX_1].ecx;
+ edx = __cpu_features.cpuid[INTEL_CPUID_INDEX_1].edx;
+#else
asm volatile ("cpuid"
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
: "0" (1));
+#endif
/* Intel prefers SSSE3 instructions for memory/string routines
if they are avaiable. */
@@ -519,7 +543,7 @@ init_cacheinfo (void)
shared /= threads;
}
/* This spells out "AuthenticAMD". */
- else if (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65)
+ else if (is_amd)
{
data = handle_amd (_SC_LEVEL1_DCACHE_SIZE);
long int core = handle_amd (_SC_LEVEL2_CACHE_SIZE);