Brendan Punsky a1e359b64a rexcode/arm64: NEON permute, compare-zero, SXTL/UXTL encode forms ...

ZIP1/2, UZP1/2, TRN1/2 (three-same permute); CMLE/CMLT and FP
FCMLE/FCMLT (compare against zero, with the literal #0 / #0.0 operand);
SXTL/SXTL2/UXTL/UXTL2 (= SSHLL/USHLL #0, plain 2-register widen, shift
implicit in the static bits). All reuse the VD/VN/VM register slots, so
no encoder change. specgen gains an emit_cmp0 shape plus permute and
widen families. All forms byte-exact vs llvm-mc; 461 tests green.

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..

generated

rexcode/arm64: NEON permute, compare-zero, SXTL/UXTL encode forms

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encoding_table.odin

rexcode/arm64: NEON permute, compare-zero, SXTL/UXTL encode forms

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gen.odin

Use @(rodata) where appropriate for the table generation

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specgen.lua

rexcode/arm64: NEON permute, compare-zero, SXTL/UXTL encode forms

2026-06-17 23:03:53 -04:00