@extensilica

SHA-256 / SHA-512 hash instruction subset

Basic bit-manipulation crypto helper extension

T-Head XTheadFMemIdx floating-point indexed memory operations

Crossbar / permutation helper extension for crypto

Entropy source / crypto CSR support

Vector crypto bit-manipulation extension

AES encryption instruction subset

SiFive vector quantized MAC dot/odd family

Carry-less multiply extension for cryptographic workloads

AES decryption instruction subset

Qualcomm Xqci interrupt/integer family

SM4 block cipher instruction subset

SM3 hash instruction subset

Vector carry-less multiply extension

Data-independent execution latency subset

Qualcomm Xqci compressed / load-immediate style family

T-Head XTheadCondMov conditional-move extension

T-Head XTheadBs bit-set / bit-select extension

Qualcomm Xqci I/O instruction family

SiFive cease / stop instruction extension

Qualcomm Xqci compressed / memory family

XuanTie Matrix Extension for AI/tile workloads (167 instructions on CUSTOM-1 opcode)

Qualcomm Xqci load/store multiple family

SiFive vector quantized MAC quad/quad family

T-Head XTheadMemIdx indexed and post/pre-increment memory operations

T-Head XTheadSync multi-core synchronization extension

SiFive vector fixed-point narrowing / clipping family

Qualcomm Xqci bit/integer instruction family

CHERIoT capability ISA subset on RISC-V (Microsoft / CHERI Alliance)

T-Head XTheadCmo cache-management-operations extension

Qualcomm comparison / conditional extension family

Ventana XVentanaCondOps conditional operations / conditional move extension

SCARV XCrypto side-channel-resistant cryptography ISA extension

CORE-V XPulp post-increment / register-register memory extension

Vector AES encryption / decryption extension

T-Head XTheadMac multiply-accumulate DSP extension

Snitch DMA / custom memory-movement extension

Andes vector dot-product extension

T-Head XTheadVdot vector dot-product (4x8-bit MAC into 32-bit elements)

SiFive VCIX coprocessor opcode / intrinsic family

Qualcomm Xqci loop/control family

Snitch Stream Semantic Registers extension

Snitch floating-point repetition extension

Rivos XRivosVizip vector register zip / unzip operations

T-Head XTheadInt fast interrupt prologue/epilogue extension

SiFive matrix / memory-related vendor family

T-Head XTheadVector RVV-0.7.1 alias extension (XuanTie C906V/C920/R920)

Vector GCM/GHASH support extension

T-Head XTheadMemPair paired-register load/store memory operations

T-Head XTheadFMv floating-point move helper (RV32 high-word transfer)

Qualcomm Xqci arithmetic/control extension family

T-Head XTheadBb bit-manipulation extension

T-Head XTheadBa address-generation / bit-addressing extension

Vector crypto timing / data-independent execution subset

Qualcomm Xqci control/status family

Vector ShangMi + GCM (Zvks + Zvkg)

CORE-V XPulp general ALU extension

Vector SHA-256 instruction extension

RISC-V Vector Matrix Extension (working draft, placeholder)

Vector SM4 instruction extension

Standard scalar crypto umbrella (Zkn + Zkr + Zkt)

CORE-V XPulp hardware loop extension

Andes performance extension family

Qualcomm Xqci loop-buffer family

Qualcomm Xqci load-immediate arithmetic family

Qualcomm Xqci CSR-related family

Stream Computing matrix extension proposal

SiFive FP/vector exponent helper family, 32-bit variant

Vector NIST + GCM (Zvkn + Zvkg)

Mojo-V privacy-oriented secret computation extension (UMich research)

CORE-V XPulp bit-manipulation extension

CORE-V XPulp multiply-accumulate DSP extension

Gemmini custom RoCC ISA for matrix/DNN accelerator operations (UC Berkeley BAR)

Vector NIST + carry-less multiply (Zvkn + Zvbc)

Vector SM3 instruction extension

Andes vector packed FP16 extension

ShangMi scalar crypto suite (Zbkb + Zbkc + Zbkx + Zksed + Zksh)

Vector crypto bit-manipulation subset (subset of Zvbb)

Vector NIST crypto suite (Zvkned + Zvknhb + Zvkb + Zvkt)

CORE-V XPulp branch-immediate extension

Qualcomm Xqci shift/load/store family

Qualcomm Xqci arithmetic extension family

SiFive vector widening MAC family

SiFive L1 data cache discard extension

Andes BF16 conversion extension

CORE-V XPulp packed-SIMD extension

Qualcomm Xqci synchronization family

Vector SHA-256 + SHA-512 instruction extension

Andes vector small-integer load extension

CORE-V XPulp event-load extension

SiFive L1 data cache flush extension

SiFive FP/vector exponent helper family, 16-bit variant

SpacemiT Integrated Matrix Extension

Rivos XRivosVisni vector integer small new instructions (zero/insert/extract)

Qualcomm base Xqci custom instruction family

Qualcomm Xqci load-immediate family

Andes vector BF16 conversion extension

Qualcomm Xqci bit-manipulation instruction family

NIST scalar crypto suite (Zbkb + Zbkc + Zbkx + Zkne + Zknd + Zknh)

RISC-V Packed SIMD / DSP Extension (working draft)

Vector ShangMi crypto suite (Zvksed + Zvksh + Zvkb + Zvkt)

Vector ShangMi + carry-less multiply (Zvks + Zvbc)