1 files changed, 41 insertions, 0 deletions

diff --git a/nacl/cpuid/x86.c b/nacl/cpuid/x86.c
new file mode 100644
index 00000000..99e6a0c4
--- /dev/null
+++ b/nacl/cpuid/x86.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+
+void nope()
+{
+  exit(1);
+}
+
+int main()
+{
+  unsigned long x[4];
+  unsigned long y[4];
+  int i;
+  int j;
+  char c;
+
+  signal(SIGILL,nope);
+
+  x[0] = 0;
+  x[1] = 0;
+  x[2] = 0;
+  x[3] = 0;
+
+  asm volatile(".byte 15;.byte 162" : "=a"(x[0]),"=b"(x[1]),"=c"(x[3]),"=d"(x[2]) : "0"(0) );
+  if (!x[0]) return 0;
+  asm volatile(".byte 15;.byte 162" : "=a"(y[0]),"=b"(y[1]),"=c"(y[2]),"=d"(y[3]) : "0"(1) );
+
+  for (i = 1;i < 4;++i)
+    for (j = 0;j < 4;++j) {
+      c = x[i] >> (8 * j);
+      if (c < 32) c = 32;
+      if (c > 126) c = 126;
+      putchar(c);
+    }
+
+  printf("-%08x-%08x\n",(unsigned int) y[0],(unsigned int) y[3]);
+
+  return 0;
+}