Loongarch Improvements with Box64 (opens in new tab)

(box86.org)

66 pointsaaronday2mo ago6 comments

6 comments

Why editorialize the title?

Actual title is "New Box64 v0.4.0 released".

I get you're trying to summarize it, but what's most relevant depends on the person reading.

I'm wondering if we'll see some riscv extensions specifically designed to improve x86/amd64 emulation, such as what the M1 and other did.

Findecanor2mo ago

Some upcoming chips are supposed to support switching individual processes to x86's "TSO" memory model. That might be the most significant extension that Apple has for x86 emulation: it allows eliding all memory fence instructions used to adapt to the weaker memory model.

LoongArch could have instructions that emulate specific x86 behaviour and flags, but there is practically no documentation available.

mort962mo ago

Is it just "some upcoming chips" inventing their own extensions? Or is this a standardized ARM extension?

Basically, will writing against these upcoming chips mean writing one implementation for Qualcomm, one implementation for Rockchip, one implementation for Samsung, etc? Or will it just require one implementation for the standard ARM "switch to total store ordering memory model" extension

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