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+qemu64 CPU model is incorrect
+
+At the moment the "qemu64" CPU is defined as follows:
+
+```
+        .vendor = CPUID_VENDOR_AMD,
+        .family = 6,
+        .model = 6,
+        .stepping = 3,
+```
+
+According to Wikipedia [1] this means the CPU is defined as part of the
+K7 family while the AMD64 ISA was only introduced with the K8 series!
+
+This causes some software such as LLVM to notice the problem (32-bit cpu
+with 64-bit capability reported in the cpuid flag) and produce various
+error messages.
+
+The simple solution would be to upgrade this definition to use the Sledgehammer
+family (15) instead. 
+
+[1] https://en.wikipedia.org/wiki/List_of_AMD_CPU_microarchitectures
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