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remove threefry rules [pr] #1358

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remove threefry rules [pr] #1358

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4 changes: 1 addition & 3 deletions tinygrad/uop/symbolic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -126,10 +126,8 @@ def fold_add_divmod_recombine(x:UOp) -> UOp|None:
(UPat.var("x").alu(Ops.POW, UPat.cvar("c", vec=False)), simplify_pow),
# positive const ** x
(UPat.cvar("c", vec=False).alu(Ops.POW, UPat.var("x")), lambda c,x: c if c.arg == 1 else (x*math.log2(c.arg)).exp2() if c.arg > 0 else None),
# rules for threefry
# bit packing simplifications # TODO: other dtypes
((UPat.var('x', dtypes.uint64)&0xFFFFFFFF).cast(dtypes.uint32), lambda x: x.cast(dtypes.uint32)),
(((UPat.var(None, dtypes.uint64)*(1<<32)) | UPat.var('y', dtypes.uint32).cast(dtypes.uint64)).cast(dtypes.uint32), lambda y: y),
(((UPat.var('x', dtypes.uint64)*(1<<32)) | UPat.var(None, dtypes.uint32).cast(dtypes.uint64))//(1<<32), lambda x: x),
(((UPat.var(None, dtypes.uint64)<<32) | UPat.var('y', dtypes.uint32).cast(dtypes.uint64)).cast(dtypes.uint32), lambda y: y),
(((UPat.var('x', dtypes.uint64)<<32) | UPat.var(None, dtypes.uint32).cast(dtypes.uint64))>>32, lambda x: x),
# ** simple where folding **
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