Module sme 

Encoder for the SME (Scalable Matrix Extension) group — the inverse of crate::decode::sme.

Gated behind #[cfg(feature = "sme")]. Without the feature the crate::encode::sme::encode stub returns crate::encode::EncodeError::Unsupported and is_sme reports false, so the default build still compiles. With it, every Sme* crate::mnemonic::Code the decoder produces is inverted: dispatch on crate::instruction::Instruction::code to a family encoder, read the operands the decoder pushed (the binja z-prefixed tile-slice spellings included), and pack the exact bitfields in reverse. It reconstructs the word purely from the instruction’s semantics — it never reads crate::instruction::Instruction::word. Total and panic-free.

SMSTART/SMSTOP are not handled here: they are MSR (immediate) PSTATE encodings owned by crate::encode::branch_sys (mirroring the decoder).

Field layout recap (inverted from the decoder)

All SME reserved-region words have word<31> == 1, op0 == 0b0000, and are split by word<31:29>:

word<31:29>	base	family
100	0x8000_0000	outer-product FP/BF16
101	0xA000_0000	outer-product integer
110	0xC000_0000	MOVA / ADDHA / ADDVA
111	0xE000_0000	ZA load/store

Functions

encodesme

Encode an SME instruction by inverting its decoder.

is_smesme

true for every Code produced by the SME decoder. (The Sme* enum variants exist regardless of the sme feature, so this is a plain match.)