v1.8.9

What's Changed

• Update RTE to support easy emulation of instructions by @stnolting in #673
• ⚠️ constrain MTVAL CSR, add MTINST CSR by @stnolting in #674
• Add Smcntrpmf ISA extension by @stnolting in #676
• [OCD] add option to select DM legacy mode by @stnolting in #677
• [cpu] remove branch prediction logic by @stnolting in #678
• minor rtl edits and cleanups by @stnolting in #679
• [cpu] add execution monitor by @stnolting in #680
• [CFU] add support for CFU-internal CSRs by @stnolting in #681
• CPU hardware optimization by @stnolting in #683

Full Changelog: v1.8.8...v1.8.9