openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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# flake8: noqa: E702
# allow semicolons to put multiple ops on one line
from enum import auto, IntEnum, Enum
# wrapper around IntEnum that preserves Enum.__str__ and makes auto() unique across all FastEnum subclasses
class FastEnum(IntEnum):
def __str__(self): return Enum.__str__(self)
def __repr__(x): return str(x)
@staticmethod
def _generate_next_value_(_, __, ___, last_values): return 1 + max([0, *last_values, *[max(c) for c in FastEnum.__subclasses__()]])
# the order of these Ops controls the order of the toposort
class Ops(FastEnum):
# ** 1 -- defines/special **
# TODO: unify these ops into the levels of the memory hierarchy
DEFINE_GLOBAL = auto(); DEFINE_LOCAL = auto(); DEFINE_REG = auto()
# this is for symbolic shapes
DEFINE_VAR = auto(); BIND = auto()
# this is a RANGE for GPU dimensions, similar to symbolic shapes but not exactly
SPECIAL = auto()
# ** 2 -- non op uops **
# uops that aren't rendered
NOOP = auto(); SINK = auto(); PRECAST = auto()
# AFTER passes src[0] through and promises in the toposort that any consumers of the AFTER run after src[1:]
AFTER = auto()
# GROUP is a NOOP that just merges things together
GROUP = auto()
# vector creation / item selection
GEP = auto(); VECTORIZE = auto()
# ** 3 -- load/store **
# INDEX is a BinaryOp similar to ADD, but it operates on pointers
INDEX = auto()
# load/store before math
LOAD = auto(); STORE = auto()
# ** 4 -- math **
# tensor core math op, not elementwise
WMMA = auto()
# UnaryOps
CAST = auto(); BITCAST = auto(); EXP2 = auto(); LOG2 = auto(); SIN = auto()
SQRT = auto(); RECIPROCAL = auto(); NEG = auto(); TRUNC = auto()
# BinaryOps
ADD = auto(); MUL = auto(); SHL = auto(); SHR = auto(); IDIV = auto(); MAX = auto(); MOD = auto()
CMPLT = auto(); CMPNE = auto(); CMPEQ = auto()
XOR = auto(); OR = auto(); AND = auto()
THREEFRY = auto(); SUB = auto(); FDIV = auto(); POW = auto()
# TernaryOps
WHERE = auto(); MULACC = auto()
# ** 5 -- control flow / consts / custom **
# control flow ops
BARRIER = auto(); RANGE = auto(); IF = auto(); END = auto(); ENDIF = auto()
# consts. VCONST is a vectorized const
VCONST = auto(); CONST = auto()
# CUSTOM/CUSTOMI are used to output strings into codegen. the I makes the string inline
CUSTOM = auto(); CUSTOMI = auto()
# ** 6 -- ops that don't exist in programs **
# tensor graph ops
UNIQUE = auto(); DEVICE = auto(); KERNEL = auto()
ASSIGN = auto()
# buffer ops
BUFFERIZE = auto(); COPY = auto(); BUFFER = auto(); BUFFER_VIEW = auto(); MSELECT = auto(); MSTACK = auto()
# ops that adjust the behavior of the scheduler
CONTIGUOUS = auto(); CONTIGUOUS_BACKWARD = auto(); DETACH = auto()
# movement ops! these only exist in the tensor graph
RESHAPE = auto(); PERMUTE = auto(); EXPAND = auto(); PAD = auto(); SHRINK = auto(); FLIP = auto()
MULTI = auto() # MULTI is really a movement op
# reduce
REDUCE_AXIS = auto(); REDUCE = auto(); ALLREDUCE = auto()
# errors/placeholders
REWRITE_ERROR = auto(); SENTINEL = auto()
# expander ops
UNROLL = auto(); CONTRACT = auto(); CAT = auto(); PTRCAT = auto()
class GroupOp:
Unary = {Ops.EXP2, Ops.LOG2, Ops.SIN, Ops.SQRT, Ops.RECIPROCAL, Ops.NEG, Ops.TRUNC}
Binary = {Ops.ADD, Ops.MUL, Ops.IDIV, Ops.MAX, Ops.MOD, Ops.CMPLT, Ops.CMPNE, Ops.CMPEQ,
Ops.XOR, Ops.SHL, Ops.SHR, Ops.OR, Ops.AND, Ops.THREEFRY, Ops.SUB, Ops.FDIV, Ops.POW}
Ternary = {Ops.WHERE, Ops.MULACC}
ALU = set.union(Unary, Binary, Ternary)
# TODO: is BITCAST always Elementwise if it's shape changing?
Elementwise = set.union(ALU, {Ops.CAST, Ops.BITCAST})
Defines = {Ops.DEFINE_GLOBAL, Ops.DEFINE_LOCAL, Ops.DEFINE_REG}
Irreducible = {Ops.CONST, Ops.DEFINE_VAR, Ops.SPECIAL, Ops.RANGE}
Movement = {Ops.RESHAPE, Ops.EXPAND, Ops.PERMUTE, Ops.PAD, Ops.SHRINK, Ops.FLIP}
Buffer = {Ops.LOAD, Ops.STORE, Ops.CONST, Ops.DEFINE_VAR}
# BinaryOps that can be flipped
Commutative = {Ops.ADD, Ops.MUL, Ops.MAX, Ops.CMPNE, Ops.CMPEQ, Ops.XOR, Ops.AND, Ops.OR}
# BinaryOps where f(f(a,b),c) = f(a,f(b,c))
Associative = {Ops.ADD, Ops.MUL, Ops.AND, Ops.OR, Ops.MAX}
# BinaryOps that satisfy f(x,x)=x see https://en.wikipedia.org/wiki/Idempotence
Idempotent = {Ops.OR, Ops.AND, Ops.MAX}
# These can change the dtype to bool
Comparison = {Ops.CMPLT, Ops.CMPNE, Ops.CMPEQ}
# do not preserve f(0) = 0
UnsafePad = {Ops.RECIPROCAL, Ops.LOG2, Ops.EXP2, Ops.IDIV, Ops.POW}
All = set(Ops)