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Merge origin/bill/rexcode: struct repack (#raw_union #packed), wasm arch

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Merge gingerBill's latest into bill/rexcode. His changes: minimize the
Instruction/Operand structs across ISAs with packed raw-unions (+ the
compiler support for #raw_union #packed), the new core:rexcode/wasm arch
and wasm/module, encode() now returns (byte_count, ok) instead of a Result
struct, decode_one made public, and assorted formatting/inlining.

Conflict: arm64/tests/pipeline_smoke.odin CSEL test -- kept the generated
4-arg inst_csel(dst,src,src2,cond) (mnemonic_builders.odin is generated,
not from Bill's branch) and adopted Bill's (byte_count, success) encode
signature.

Required rebuilding ./odin from the merged source for the packed-union
syntax. Re-validated after the repack: regenerated all artifacts
(idempotent -- no spurious churn), all 10 arches gen/builders/check/test
green, and byte-compared the new arm32 BF + mips PS/MMI/DSP/R6 forms to
confirm no field truncation. arm64/arm32/mips still 100%.
This commit is contained in:
Brendan Punsky
2026-06-18 05:44:48 -04:00
committed by Flāvius
parent 83bdd501a3 b6fdabc874
commit 4cc6977321
92 changed files with 9914 additions and 5421 deletions
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9
core/rexcode/doc.odin
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@@ -51,17 +51,8 @@ compile time — no table is built during a normal library build:
odin run <arch>/tablegen # ENCODING_TABLE -> generated Odin + <arch>/tables.odin
odin run <arch>/tablegen/generated # -> <arch>/tables/<arch>.*.bin
```
Regenerate after editing `ENCODING_TABLE`. See `docs/table_migration.md`.
## Performance (x86)
With `-o:speed -microarch:native -no-bounds-check`:
- Encoder: ~17 M instructions/sec (~56 MB/s)
- Decoder: ~16 M instructions/sec (~54 MB/s)
Measured on AMD Ryzen 3950X.
## Usage
```odin