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b_crlf
2019 Aug 14
3
[RFC][RISCV] Selection of complex codegen patterns into RISCV bit manipulation instructions
Hi all,
I'm currently working on the implementation for LLVM of the RISCV Bit
Manipulation ISA extension described by Clifford Wolf in the following
presentation:
https://content.riscv.org/wp-content/uploads/2019/06/17.10-b_wolf.pdf
and the following document:
https://github.com/riscv/riscv-bitmanip/blob/master/bitmanip-0.90.pdf
The aim is to provide the intrinsic functions to the user in order to
implement code that is more optimal for bit manipulations on RISCV
targets, but also to provide automatic optimization by lo...