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"""
Constants about the CPU:
- CPU_BIGENDIAN (bool)
- CPU_64BITS (bool)
- CPU_WORD_SIZE (int)
- CPU_MAX_UINT (int)
- CPU_PPC32 (bool)
- CPU_PPC64 (bool)
- CPU_I386 (bool)
- CPU_X86_64 (bool)
- CPU_INTEL (bool)
- CPU_POWERPC (bool)
"""
try:
from os import uname
HAS_UNAME = True
except ImportError:
HAS_UNAME = False
from platform import architecture
from sys import byteorder
from ctypes import sizeof, c_void_p
CPU_BIGENDIAN = (byteorder == 'big')
CPU_64BITS = (sizeof(c_void_p) == 8)
if CPU_64BITS:
CPU_WORD_SIZE = 8 # bytes
CPU_MAX_UINT = 0xffffffffffffffff
else:
CPU_WORD_SIZE = 4 # bytes
CPU_MAX_UINT = 0xffffffff
if HAS_UNAME:
# guess machine type using uname()
_machine = uname()[4]
CPU_PPC32 = (_machine == 'ppc')
CPU_PPC64 = (_machine in ('ppc64', 'ppc64le'))
CPU_I386 = (_machine in ("i386", "i686")) # compatible Intel 32 bits
CPU_X86_64 = (_machine in ("x86_64", "amd64")) # compatible Intel 64 bits
CPU_ARM32 = _machine.startswith('arm')
CPU_AARCH64 = (_machine == 'aarch64')
CPU_RISCV32 = (_machine == 'riscv32')
CPU_RISCV64 = (_machine == 'riscv64')
del _machine
else:
# uname() fallback for Windows
# I hope that your Windows doesn't run on PPC32/PPC64
CPU_PPC32 = False
CPU_PPC64 = False
CPU_I386 = False
CPU_X86_64 = False
CPU_ARM32 = False
CPU_AARCH64 = False
CPU_RISCV32 = False
CPU_RISCV64 = False
bits, linkage = architecture()
if bits == '32bit':
CPU_I386 = True
elif bits == '64bit':
CPU_X86_64 = True
else:
raise ValueError("Unknown architecture bits: %r" % bits)
CPU_INTEL = (CPU_I386 or CPU_X86_64)
CPU_POWERPC = (CPU_PPC32 or CPU_PPC64)
CPU_ARM = (CPU_ARM32 or CPU_AARCH64)
CPU_RISCV = (CPU_RISCV32 or CPU_RISCV64)
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