Skip to content
Commit 9e5c5afc authored by Ben Shi's avatar Ben Shi
Browse files

[RISCV] Optimize multiplication in the zba extension with SH*ADD 

This patch make the following optimization.

(mul x, 3 * power_of_2) -> (SLLI (SH1ADD x, x), bits)
(mul x, 5 * power_of_2) -> (SLLI (SH2ADD x, x), bits)
(mul x, 9 * power_of_2) -> (SLLI (SH3ADD x, x), bits)

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D105796
parent 6efb3220
Show whitespace changes
Inline Side-by-side
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Please to comment