Andreas Kling 2db4d30e56 AsmIntGen: Stop maintaining w25 (pc) on every asmint dispatch on aarch64 ...

x21 (instruction pointer = pb + pc) is already the primary dispatch
register. Maintaining w25 (the 32-bit pc offset) in parallel on every
dispatch_next, goto_handler, and dispatch_variable was redundant.

Compute the 32-bit pc on demand via `sub w1, w21, w26` only when
calling into C++ (slow paths), which is the cold path. This removes
one instruction from every hot dispatch sequence and every jump target.

The generated output shrinks from 4692 to 4345 lines (~347 instructions
removed), with every handler benefiting from shorter dispatch tails.

2026-03-08 23:04:55 +01:00

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src

AsmIntGen: Stop maintaining w25 (pc) on every asmint dispatch on aarch64

2026-03-08 23:04:55 +01:00

Cargo.lock

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Cargo.toml

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