The M Extension: Multiply, Divide, and the Rules for Divide-by-Zero and Overflow
Part 7 of the RISC-V series. Covers the 13 multiply and divide instructions of the M extension and the defined results for divide-by-zero and overflow (no exceptions), then runs 1,948 boundary cases on QEMU and confirms they all match a reference model. Without M, each multiply costs 86 extra instructions.
Sunhong'sSystem Blog
RISC-V