README.md

May 21, 2026 · View on GitHub

x86-64, ARM, and RISC-V V intrinsics viewer

make download (or some of make download-x86, make download-arm, make download-riscv, make download-wasm)
open index.html in a browser (depending on browser settings, you may need to start a local webserver, e.g. python3 -m http.server)

Alternatively, the WASM and RISC-V RVV intrinsics can be viewed online.

Searching is done by finding entries that match all space-separated things. Things can be:

regular text (add), quoted text ("add packed"), regex (/\bmul/);
the above, in a specific field: ret:int8, arg:/int\d+_t/, etc (if no field is specified, the checkboxes are used);
the above, negated: !ret:void, !add, !name:maskz, etc.

Additionally, var=[name] will default the whole search to a specific variation.

term	checkbox	description
`name:`	intrinsic	intrinsic name
`ret:`	intrinsic	return value
`arg:`	intrinsic	argument type
`type:`	intrinsic	any result or argument type
`argn:`	—	argument name
`arg[N]n:`	—	n-th (1-indexed) argument name, e.g. `arg3n:/\bmask\b/`
`arg[N]:`	—	n-th (1-indexed) argument type
`desc:`	description	description
`inst:`	instruction	instruction
`oper:`	operation	operation
`cat:`	category	category (nesting is `\|`-separated)
`arch:`	—	architecture (nesting is `\|`-separated)
`var=[name]:`	—	search in specific variation, e.g. `var=base:arg:bool`

General:

x86-64 AVX-512:

var=base:name:mask name:_mm512 - 512-bit intrinsics with "mask" in the name that's not in a variation

ARM NEON:

RISC-V rvv:

var=_m - maskable intrinsics
var=base arg:vbool or var=base:arg:vbool - non-masked intrinsics taking a boolean vector argument
!name:/_.(8|16|64)m/ !name:/mf?[248]$/ !name:/_b(1|2|4|16|32|64)$/ - discard repetitive intrinsics, keep LMUL=1, 32-bit element
!argn:/vl$/ - intrinsics that don't require a specified VL