1 files changed, 72 insertions, 0 deletions
diff --git a/hwloc-1.2.1/include/private/cpuid.h b/hwloc-1.2.1/include/private/cpuid.h
new file mode 100644
index 00000000..60522d2d
--- /dev/null
+++ b/hwloc-1.2.1/include/private/cpuid.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright © 2010-2011 Université Bordeaux 1
+ * Copyright © 2010 Cisco Systems, Inc.  All rights reserved.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/* Internals for x86's cpuid.  */
+
+#ifndef HWLOC_PRIVATE_CPUID_H
+#define HWLOC_PRIVATE_CPUID_H
+
+#ifdef HWLOC_X86_32_ARCH
+static __hwloc_inline int hwloc_have_cpuid(void)
+{
+  int ret;
+  unsigned tmp, tmp2;
+  asm(
+      "mov $0,%0\n\t"   /* Not supported a priori */
+
+      "pushfl   \n\t"   /* Save flags */
+
+      "pushfl   \n\t"                                           \
+      "pop %1   \n\t"   /* Get flags */                         \
+
+#define TRY_TOGGLE                                              \
+      "xor $0x00200000,%1\n\t"        /* Try to toggle ID */    \
+      "mov %1,%2\n\t"   /* Save expected value */               \
+      "push %1  \n\t"                                           \
+      "popfl    \n\t"   /* Try to toggle */                     \
+      "pushfl   \n\t"                                           \
+      "pop %1   \n\t"                                           \
+      "cmp %1,%2\n\t"   /* Compare with expected value */       \
+      "jnz Lhwloc1\n\t"   /* Unexpected, failure */               \
+
+      TRY_TOGGLE        /* Try to set/clear */
+      TRY_TOGGLE        /* Try to clear/set */
+
+      "mov $1,%0\n\t"   /* Passed the test! */
+
+      "Lhwloc1: \n\t"
+      "popfl    \n\t"   /* Restore flags */
+
+      : "=r" (ret), "=&r" (tmp), "=&r" (tmp2));
+  return ret;
+}
+#endif /* HWLOC_X86_32_ARCH */
+#ifdef HWLOC_X86_64_ARCH
+static __hwloc_inline int hwloc_have_cpuid(void) { return 1; }
+#endif /* HWLOC_X86_64_ARCH */
+
+static __hwloc_inline void hwloc_cpuid(unsigned *eax, unsigned *ebx, unsigned *ecx, unsigned *edx)
+{
+  asm(
+#ifdef HWLOC_X86_32_ARCH 
+  "push %%ebx\n\t"
+#endif
+  "cpuid\n\t"
+#ifdef HWLOC_X86_32_ARCH 
+  "mov %%ebx,%1\n\t"
+  "pop %%ebx\n\t"
+#endif
+  : "+a" (*eax),
+#ifdef HWLOC_X86_32_ARCH 
+    "=r" (*ebx),
+#else
+    "=b" (*ebx),
+#endif
+    "+c" (*ecx), "=d" (*edx));
+}
+
+#endif /* HWLOC_PRIVATE_CPUID_H */