Implementing mpz_addmul_2exp based on mpn_addlsh_n

Albin Ahlbäck albin.ahlback at
Sun Jan 30 23:30:49 CET 2022


I noticed that there are undocumented functions mpn_addlsh_n and 
mpn_rsblsh_n in GMP, and I was wondering if there is any possibilities 
to add corresponding mpz functions in the lines of:

	mpz_addmul_2exp(mpz_t rop, const mpz_t op1, mp_bitcnt_t op2)

	Set rop to rop + op1 times 2 raised to op2.

Would this be possible? If not, would it be possible to document and 
"uncover" these functions so that one can utilize these mpn functions 
with confidence?


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