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import sys
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rlib.rmmap import alloc, free
def detect_sse2():
data = alloc(4096)
pos = 0
for c in ("\xB8\x01\x00\x00\x00" # MOV EAX, 1
"\x53" # PUSH EBX
"\x0F\xA2" # CPUID
"\x5B" # POP EBX
"\x92" # XCHG EAX, EDX
"\xC3"): # RET
data[pos] = c
pos += 1
fnptr = rffi.cast(lltype.Ptr(lltype.FuncType([], lltype.Signed)), data)
code = fnptr()
free(data, 4096)
return bool(code & (1<<25)) and bool(code & (1<<26))
def detect_x32_mode():
data = alloc(4096)
pos = 0 # 32-bit 64-bit / x32
for c in ("\x48" # DEC EAX
"\xB8\xC8\x00\x00\x00"# MOV EAX, 200 MOV RAX, 0x40404040000000C8
"\x40\x40\x40\x40" # 4x INC EAX
"\xC3"): # RET RET
data[pos] = c
pos += 1
fnptr = rffi.cast(lltype.Ptr(lltype.FuncType([], lltype.Signed)), data)
code = fnptr()
free(data, 4096)
assert code in (200, 204, 0x40404040000000C8)
return code == 200
if __name__ == '__main__':
if detect_sse2():
print 'Processor supports sse2.'
else:
print 'Missing processor support for sse2.'
if detect_x32_mode():
print 'Process is running in "x32" mode.'
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