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cmd/compile: update ABI document for loong64

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The duff device has been dropped on loong64,
now we can remove related documentation.

Change-Id: I0bd721adc227522ae3c56dfe199ef735cfdf5d33
Reviewed-on: https://go-review.googlesource.com/c/go/+/740260
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Guoqi Chen 2026-01-29 23:26:09 +08:00 • committed by Gopher Robot
parent 10ed9b6ed5
commit baa6b1f2bf
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3
src/cmd/compile/abi-internal.md
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@ -643,8 +643,6 @@ Registers R20 - R21, R23 – R28, R30 - R31, F16 – F31 are permanent scratch r
Register R2 is reserved and never used.
Register R20, R21 is Used by runtime.duffcopy, runtime.duffzero.
Special-purpose registers used within Go generated code and Go assembly code
are as follows:
@ -653,7 +651,6 @@ are as follows:
| R0 | Zero value | Same | Same |
| R1 | Link register | Link register | Scratch |
| R3 | Stack pointer | Same | Same |
| R20,R21 | Scratch | Scratch | Used by duffcopy, duffzero |
| R22 | Current goroutine | Same | Same |
| R29 | Closure context pointer | Same | Same |
| R30, R31 | used by the assembler | Same | Same |