diff options
Diffstat (limited to 'lib/spack/external/archspec/vendor/cpuid/README.md')
| -rw-r--r-- | lib/spack/external/archspec/vendor/cpuid/README.md | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/lib/spack/external/archspec/vendor/cpuid/README.md b/lib/spack/external/archspec/vendor/cpuid/README.md new file mode 100644 index 0000000000..4c79e37d86 --- /dev/null +++ b/lib/spack/external/archspec/vendor/cpuid/README.md @@ -0,0 +1,76 @@ +cpuid.py +======== + +Now, this is silly! + +Pure Python library for accessing information about x86 processors +by querying the [CPUID](http://en.wikipedia.org/wiki/CPUID) +instruction. Well, not exactly pure Python... + +It works by allocating a small piece of virtual memory, copying +a raw x86 function to that memory, giving the memory execute +permissions and then calling the memory as a function. The injected +function executes the CPUID instruction and copies the result back +to a ctypes.Structure where is can be read by Python. + +It should work fine on both 32 and 64 bit versions of Windows and Linux +running x86 processors. Apple OS X and other BSD systems should also work, +not tested though... + + +Why? +---- +For poops and giggles. Plus, having access to a low-level feature +without having to compile a C wrapper is pretty neat. + + +Examples +-------- +Getting info with eax=0: + + import cpuid + + q = cpuid.CPUID() + eax, ebx, ecx, edx = q(0) + +Running the files: + + $ python example.py + Vendor ID : GenuineIntel + CPU name : Intel(R) Xeon(R) CPU W3550 @ 3.07GHz + + Vector instructions supported: + SSE : Yes + SSE2 : Yes + SSE3 : Yes + SSSE3 : Yes + SSE4.1 : Yes + SSE4.2 : Yes + SSE4a : -- + AVX : -- + AVX2 : -- + + $ python cpuid.py + CPUID A B C D + 00000000 0000000b 756e6547 6c65746e 49656e69 + 00000001 000106a5 00100800 009ce3bd bfebfbff + 00000002 55035a01 00f0b2e4 00000000 09ca212c + 00000003 00000000 00000000 00000000 00000000 + 00000004 00000000 00000000 00000000 00000000 + 00000005 00000040 00000040 00000003 00001120 + 00000006 00000003 00000002 00000001 00000000 + 00000007 00000000 00000000 00000000 00000000 + 00000008 00000000 00000000 00000000 00000000 + 00000009 00000000 00000000 00000000 00000000 + 0000000a 07300403 00000044 00000000 00000603 + 0000000b 00000000 00000000 00000095 00000000 + 80000000 80000008 00000000 00000000 00000000 + 80000001 00000000 00000000 00000001 28100800 + 80000002 65746e49 2952286c 6f655820 2952286e + 80000003 55504320 20202020 20202020 57202020 + 80000004 30353533 20402020 37302e33 007a4847 + 80000005 00000000 00000000 00000000 00000000 + 80000006 00000000 00000000 01006040 00000000 + 80000007 00000000 00000000 00000000 00000100 + 80000008 00003024 00000000 00000000 00000000 + |