arch-x86: Rework float regs for getReg and setReg.

Change-Id: I9ef7493225678923964721bf91f2fd2c43d4d1e7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/49760
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
7 files changed