...The assembler itself isn't a separate tool, but rather a collection of C/C++
header files, which applications need to include directly in order to use.
At present, Intel SSE/SSE2/SSE4 and AVX/AVX2/AVX-512 (32/64-bit x86 ISAs),
ARMv7 NEON/NEONv2, ARMv8 AArch32 and AArch64 NEON, SVE (32/64-bit ARM ISAs),
MIPS 32/64-bit r5/r6 MSA and POWER 32/64-bit VMX/VSX (little/big-endian ISAs)
are mostly implemented (/w horizontal reductions) although scalar improvements,
wider SIMD vectors with zeroing/merging predicates in 3/4-operand instructions
are planned as extensions to current 2/3-operand SPMD-driven vertical SIMD ISA.
...