[BUG] Language support doesn't recognize register names

[sajibsrs]

Bug Description

Registers names are not recognized by language support.
Such as: stp x29, x30, [sp, #-32]!

While this compiles just fine, LS doesn't recognize these names like XZR, SP, FP, LR etc. Also, hover help tool tip is unavailable to the whole line of code.

Steps to Reproduce

stp x29, x30, [sp, #-32]!
mov x29, sp

Expected Behavior

Hover help tool tip should show up.

Actual Behavior

Won't display help tool tip for the whole line.

Environment

• OS: macOS 26

• ArmLS Version: [e.g., 1.2.3]

• VSCode extension: 0.12.1

• I have searched for existing bug reports

• I have included all relevant information

[alona-em]

Hmm, I can't reproduce this, the tooltip comes up for me:

sp is definitely recognized as a register. You can see this as it's registers are highlighted differently to non-register identifier operands (in some color-schemes):

fp isn't recognized as a register. This is a bug that'll be fixed.