def _threefry2x32_gpu_lowering(threefry2x32_lowering, ctx, k1, k2, x1, x2):
aval_out, _ = ctx.avals_out
k1_aval, k2_aval, x1_aval, x2_aval = ctx.avals_in
rank = len(aval_out.shape)
if 0 in aval_out.shape:
zeros = mlir.full_like_aval(0, aval_out)
return [zeros, zeros]
def _broadcast(x, aval):
return mhlo.BroadcastInDimOp(
mlir.aval_to_ir_type(aval_out), x,
mlir.dense_int_elements(range(rank - len(aval.shape), rank))).result
return threefry2x32_lowering(
(_broadcast(k1, k1_aval), _broadcast(k2, k2_aval)),
(_broadcast(x1, x1_aval), _broadcast(x2, x2_aval)))
def _reduce_window_lower(reduce_op, init_value, ctx, operand, *,
window_dimensions, window_strides, padding,
base_dilation, window_dilation):
aval_out, = ctx.avals_out
operand_aval, = ctx.avals_in
scalar_aval = operand_aval.update(shape=())
scalar_type = mlir.aval_to_ir_type(scalar_aval)
rw = mhlo.ReduceWindowOp(
mlir.aval_to_ir_types(aval_out), [operand],
[mlir.full_like_aval(init_value(scalar_aval.dtype), scalar_aval)],
mlir.dense_int_elements(window_dimensions),
mlir.dense_int_elements(window_strides),
mlir.dense_int_elements(base_dilation),
mlir.dense_int_elements(window_dilation),
ir.DenseIntElementsAttr.get(np.asarray(padding, np.int64)))
reducer = rw.regions[0].blocks.append(scalar_type, scalar_type)
with ir.InsertionPoint(reducer):
mhlo.ReturnOp(reduce_op(*reducer.arguments))
return rw.results