| m | 'M' (Integer Multiplication and Division). | ⛔️ | ✅ |
| a | 'A' (Atomic Instructions). | ⛔️ | ✅ |
| c | 'C' (Compressed Instructions). | ⛔️ | ✅ |
| f | 'F' (Single-Precision Floating-Point). | ⛔️ | ✅ |
| d | 'D' (Double-Precision Floating-Point). | ⛔️ | ✅ |
| e | Implements RV32E (provides 16 rather than 32 GPRs). | ⛔️ | ⛔️ |
| v | 'V' (Vector Extension for Application Processors). | ⛔️ | ⛔️ |
| zfinx | 'Zfinx' (Float in Integer). | ⛔️ | ⛔️ |
| zdinx | 'Zdinx' (Double in Integer). | ⛔️ | ⛔️ |
| zhinx | 'Zhinx' (Half Float in Integer). | ⛔️ | ⛔️ |
| zhinxmin | 'Zhinxmin' (Half Float in Integer Minimal). | ⛔️ | ⛔️ |
| zfh | 'Zfh' (Half-Precision Floating-Point). | ⛔️ | ⛔️ |
| zfhmin | 'Zfhmin' (Half-Precision Floating-Point Minimal). | ⛔️ | ⛔️ |
| zba | 'Zba' (Address Generation Instructions). | ⛔️ | ⛔️ |
| zbb | 'Zbb' (Basic Bit-Manipulation). | ⛔️ | ⛔️ |
| zbc | 'Zbc' (Carry-Less Multiplication). | ⛔️ | ⛔️ |
| zbs | 'Zbs' (Single-Bit Instructions). | ⛔️ | ⛔️ |
| zbkb | 'Zbkb' (Bitmanip instructions for Cryptography). | ⛔️ | ⛔️ |
| zbkc | 'Zbkc' (Carry-less multiply instructions for Cryptography). | ⛔️ | ⛔️ |
| zbkx | 'Zbkx' (Crossbar permutation instructions). | ⛔️ | ⛔️ |
| zknd | 'Zknd' (NIST Suite: AES Decryption). | ⛔️ | ⛔️ |
| zkne | 'Zkne' (NIST Suite: AES Encryption). | ⛔️ | ⛔️ |
| zknh | 'Zknh' (NIST Suite: Hash Function Instructions). | ⛔️ | ⛔️ |
| zksed | 'Zksed' (ShangMi Suite: SM4 Block Cipher Instructions). | ⛔️ | ⛔️ |
| zksh | 'Zksh' (ShangMi Suite: SM3 Hash Function Instructions). | ⛔️ | ⛔️ |
| zkr | 'Zkr' (Entropy Source Extension). | ⛔️ | ⛔️ |
| zkn | 'Zkn' (NIST Algorithm Suite). | ⛔️ | ⛔️ |
| zks | 'Zks' (ShangMi Algorithm Suite). | ⛔️ | ⛔️ |
| zk | 'Zk' (Standard scalar cryptography extension). | ⛔️ | ⛔️ |
| zkt | 'Zkt' (Data Independent Execution Latency). | ⛔️ | ⛔️ |
| crt-static | Enables C Run-time Libraries to be statically linked. | ⛔️ | ⛔️ |
| 64bit | Implements RV64. | ✅ | ⛔️ |
| experimental-zbe | 'Zbe' (Extract-Deposit 'Zb' Instructions). | ✅ | ⛔️ |
| experimental-zbf | 'Zbf' (Bit-Field 'Zb' Instructions). | ✅ | ⛔️ |
| experimental-zbm | 'Zbm' (Matrix 'Zb' Instructions). | ✅ | ⛔️ |
| experimental-zbp | 'Zbp' (Permutation 'Zb' Instructions). | ✅ | ⛔️ |
| experimental-zbr | 'Zbr' (Polynomial Reduction 'Zb' Instructions). | ✅ | ⛔️ |
| experimental-zbt | 'Zbt' (Ternary 'Zb' Instructions). | ✅ | ⛔️ |
| experimental-zvfh | 'Zvfh' (Vector Half-Precision Floating-Point). | ✅ | ⛔️ |
| lui-addi-fusion | Enable LUI+ADDI macrofusion. | ✅ | ⛔️ |
| no-default-unroll | Disable default unroll preference.. | ✅ | ⛔️ |
| no-rvc-hints | Disable RVC Hint Instructions.. | ✅ | ⛔️ |
| relax | Enable Linker relaxation.. | ✅ | ⛔️ |
| reserve-x1 | Reserve X1. | ✅ | ⛔️ |
| reserve-x10 | Reserve X10. | ✅ | ⛔️ |
| reserve-x11 | Reserve X11. | ✅ | ⛔️ |
| reserve-x12 | Reserve X12. | ✅ | ⛔️ |
| reserve-x13 | Reserve X13. | ✅ | ⛔️ |
| reserve-x14 | Reserve X14. | ✅ | ⛔️ |
| reserve-x15 | Reserve X15. | ✅ | ⛔️ |
| reserve-x16 | Reserve X16. | ✅ | ⛔️ |
| reserve-x17 | Reserve X17. | ✅ | ⛔️ |
| reserve-x18 | Reserve X18. | ✅ | ⛔️ |
| reserve-x19 | Reserve X19. | ✅ | ⛔️ |
| reserve-x2 | Reserve X2. | ✅ | ⛔️ |
| reserve-x20 | Reserve X20. | ✅ | ⛔️ |
| reserve-x21 | Reserve X21. | ✅ | ⛔️ |
| reserve-x22 | Reserve X22. | ✅ | ⛔️ |
| reserve-x23 | Reserve X23. | ✅ | ⛔️ |
| reserve-x24 | Reserve X24. | ✅ | ⛔️ |
| reserve-x25 | Reserve X25. | ✅ | ⛔️ |
| reserve-x26 | Reserve X26. | ✅ | ⛔️ |
| reserve-x27 | Reserve X27. | ✅ | ⛔️ |
| reserve-x28 | Reserve X28. | ✅ | ⛔️ |
| reserve-x29 | Reserve X29. | ✅ | ⛔️ |
| reserve-x3 | Reserve X3. | ✅ | ⛔️ |
| reserve-x30 | Reserve X30. | ✅ | ⛔️ |
| reserve-x31 | Reserve X31. | ✅ | ⛔️ |
| reserve-x4 | Reserve X4. | ✅ | ⛔️ |
| reserve-x5 | Reserve X5. | ✅ | ⛔️ |
| reserve-x6 | Reserve X6. | ✅ | ⛔️ |
| reserve-x7 | Reserve X7. | ✅ | ⛔️ |
| reserve-x8 | Reserve X8. | ✅ | ⛔️ |
| reserve-x9 | Reserve X9. | ✅ | ⛔️ |
| save-restore | Enable save/restore.. | ✅ | ⛔️ |
| sifive7 | SiFive 7-Series processors. | ✅ | ⛔️ |
| unaligned-scalar-mem | Has reasonably performant unaligned scalar loads and stores. | ✅ | ⛔️ |
| zicbom | 'Zicbom' (Cache-Block Management Instructions). | ✅ | ⛔️ |
| zicbop | 'Zicbop' (Cache-Block Prefetch Instructions). | ✅ | ⛔️ |
| zicboz | 'Zicboz' (Cache-Block Zero Instructions). | ✅ | ⛔️ |
| zihintpause | 'zihintpause' (Pause Hint). | ✅ | ⛔️ |
| zmmul | 'Zmmul' (Integer Multiplication). | ✅ | ⛔️ |
| zve32f | 'Zve32f' (Vector Extensions for Embedded Processors with maximal 32 EEW and F extension). | ✅ | ⛔️ |
| zve32x | 'Zve32x' (Vector Extensions for Embedded Processors with maximal 32 EEW). | ✅ | ⛔️ |
| zve64d | 'Zve64d' (Vector Extensions for Embedded Processors with maximal 64 EEW, F and D extension). | ✅ | ⛔️ |
| zve64f | 'Zve64f' (Vector Extensions for Embedded Processors with maximal 64 EEW and F extension). | ✅ | ⛔️ |
| zve64x | 'Zve64x' (Vector Extensions for Embedded Processors with maximal 64 EEW). | ✅ | ⛔️ |
| zvl1024b | 'Zvl' (Minimum Vector Length) 1024. | ✅ | ⛔️ |
| zvl128b | 'Zvl' (Minimum Vector Length) 128. | ✅ | ⛔️ |
| zvl16384b | 'Zvl' (Minimum Vector Length) 16384. | ✅ | ⛔️ |
| zvl2048b | 'Zvl' (Minimum Vector Length) 2048. | ✅ | ⛔️ |
| zvl256b | 'Zvl' (Minimum Vector Length) 256. | ✅ | ⛔️ |
| zvl32768b | 'Zvl' (Minimum Vector Length) 32768. | ✅ | ⛔️ |
| zvl32b | 'Zvl' (Minimum Vector Length) 32. | ✅ | ⛔️ |
| zvl4096b | 'Zvl' (Minimum Vector Length) 4096. | ✅ | ⛔️ |
| zvl512b | 'Zvl' (Minimum Vector Length) 512. | ✅ | ⛔️ |
| zvl64b | 'Zvl' (Minimum Vector Length) 64. | ✅ | ⛔️ |
| zvl8192b | 'Zvl' (Minimum Vector Length) 8192. | ✅ | ⛔️ |