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GC3000 has a new LOG instruction, similar to the new SIN and COS instructions. Generate the new instruction sequence when appropriate; there are two occasions, as part of LIT and the generator for the LG2 instruction itself. Signed-off-by: Wladimir J. van der Laan <laanwj@gmail.com> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>