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cmd/compile/internal-abi: update internal ABI spec for g register

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We've already implemented dedicating R14 as the G register on amd64,
so remove the TODO saying we might want to hold off on this.

For #40724.

Change-Id: I45b24ced03cac862127b53f5e9a4b4bcf6b1f86c
Reviewed-on: https://go-review.googlesource.com/c/go/+/295790
Trust: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
This commit is contained in:
Austin Clements 2021-02-23 21:22:20 -05:00
parent 478277f812
commit 3deb528199
1 changed files with 0 additions and 3 deletions
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src/cmd/compile/internal-abi.md
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@ -402,9 +402,6 @@ Special-purpose registers are as follows:
| R15 | GOT reference temporary | Fixed if dynlink | | R15 | GOT reference temporary | Fixed if dynlink |
| X15 | Zero value | Fixed | | X15 | Zero value | Fixed |
TODO: We may start with the existing TLS-based g and move to R14
later.
*Rationale*: These register meanings are compatible with Go’s *Rationale*: These register meanings are compatible with Go’s
stack-based calling convention except for R14 and X15, which will have stack-based calling convention except for R14 and X15, which will have
to be restored on transitions from ABI0 code to ABIInternal code. to be restored on transitions from ABI0 code to ABIInternal code.