mirror of
https://github.com/netwide-assembler/nasm
synced 2026-08-26 16:23:04 -04:00
5422294119
For instruction operand tokens that carry an explicit size in their own name (mem8/16/32/64/..., rm8/16/32/64, xmmrm.../ymmrm256/zmmrm512, mmxrm/mmxrm64), the generator previously always emitted an explicit size keyword (e.g. "dword", "oword") for the memory operand. This never exercised NASM's SM-flag-driven implicit-size-inference path, where the size of an ambiguous memory operand is inferred from a paired already-sized operand (typically a same-width register) in the same instruction template (e.g. ADD reg32,rm32 or MOVBE reg32,mem32 don't need an explicit size keyword). Add build_implicitsize_line(), which replaces the first memory-capable operand whose base token has a nonzero %mem_sizebits entry with a bare (size-keyword-free) memory operand, leaving all other operands as normally generated. As with the other coverage buckets (hireg, apxreg, mask/maskz/broadcast/saeer, disp8/32 boundary), the candidate line is routed through the shared cumulative staged probe and only kept if it actually assembles for that instruction -- this avoids needing to parse and replicate NASM's own SM/AR flag-driven operand-size-disambiguation logic. Note: for tokens with no size in their own name (plain "mem"), the existing mem_operand($rng, 0) generator path already omits the size keyword unconditionally, so that half of implicit-size coverage was already exercised prior to this change; only explicitly-sized tokens needed the new candidate. Verified via full scratch regeneration (2606 mnemonics / 16 dropped, unchanged) + nasm-t.py run (6955/6955 PASS, 0 FAIL) + per-mnemonic .json entry-count diff against the prior committed tree (zero differences, confirming no bit-width regressions). 1922/2606 mnemonics gained new implicit-size coverage lines. Regenerated travis/insns/ and validated via 'make -j32 travis' (all PASS, ~26s). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> |
||
|---|---|---|
| .. | ||
| prefetchwt1.asm | ||
| prefetchwt1.bin16.t | ||
| prefetchwt1.bin32.t | ||
| prefetchwt1.bin64.t | ||
| prefetchwt1.json | ||
| prefetchwt1_narrow.asm | ||