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2020-07-31lib/mpi: Add mpi_sub_ui()Marcelo Henrique Cerri
Add mpi_sub_ui() based on Gnu MP mpz_sub_ui() function from file mpz/aors_ui.h[1] from change id 510b83519d1c adapting the code to the kernel's data structures, helper functions and coding style and also removing the defines used to produce mpz_sub_ui() and mpz_add_ui() from the same code. [1] https://gmplib.org/repo/gmp-6.2/file/510b83519d1c/mpz/aors.h Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>