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# $Id: cpu.py 10883 2009-12-05 18:54:27Z mthuurne $
class CPU(object):
'''Abstract base class for CPU families.
'''
# String that we use to identify this CPU type.
name = None
# Big (True) or little (False) endian?
# Note that some CPUs can do both; if both settings are used in practice
# we treat them like different CPUs (see MIPS/MIPSel).
bigEndian = None
# Allow unaligned memory accesses?
unalignedMemoryAccess = False
# GCC flags to pass to the compile and link commands.
gccFlags = ()
class Alpha(CPU):
'''DEC Alpha.
'''
name = 'alpha'
bigEndian = False
class ARM(CPU):
'''ARM.
'''
name = 'arm'
bigEndian = False
class AVR32(CPU):
'''Atmel AVR32, an embedded RISC CPU.
'''
name = 'avr32'
bigEndian = True
class HPPA(CPU):
'''HP PA-RISC.
'''
name = 'hppa'
bigEndian = True
class IA64(CPU):
'''Intel Itanium.
'''
name = 'ia64'
bigEndian = False
class M68k(CPU):
'''Motorola 680x0.
'''
name = 'm68k'
bigEndian = True
class MIPS(CPU):
'''Big endian MIPS.
'''
name = 'mips'
bigEndian = True
class MIPSel(MIPS):
'''Little endian MIPS.
'''
name = 'mipsel'
bigEndian = False
class PPC(CPU):
'''32-bit Power PC.
'''
name = 'ppc'
bigEndian = True
class PPC64(CPU):
'''64-bit Power PC.
'''
name = 'ppc64'
bigEndian = True
class S390(CPU):
'''IBM S/390.
'''
name = 's390'
bigEndian = True
class SH(CPU):
'''Little endian Renesas SuperH.
'''
name = 'sh'
bigEndian = False
class SHeb(CPU):
'''Big endian Renesas SuperH.
'''
name = 'sheb'
bigEndian = True
class Sparc(CPU):
'''Sun Sparc.
'''
name = 'sparc'
bigEndian = True
class X86(CPU):
'''32-bit x86: Intel Pentium, AMD Athlon etc.
'''
name = 'x86'
bigEndian = False
unalignedMemoryAccess = True
gccFlags = '-m32',
class X86_64(CPU):
'''64-bit x86. Also known as AMD64 or x64.
'''
name = 'x86_64'
bigEndian = False
unalignedMemoryAccess = True
gccFlags = '-m64',
# Build a dictionary of CPUs using introspection.
def _discoverCPUs(localObjects):
for obj in localObjects:
if isinstance(obj, type) and issubclass(obj, CPU):
if not (obj is CPU):
yield obj.name, obj
_cpusByName = dict(_discoverCPUs(locals().itervalues()))
def getCPU(name):
return _cpusByName[name]
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