rflags included in register definitions for x86

[james-a-johnson]

Version and Platform (required):

• Binary Ninja Version: 5.3.8622-dev
• Edition: Commercial
• OS: MacOS
• OS Version: Tahoe 26.1
• CPU Architecture: M2

Bug Description: For the x86 architecture, the rflags register is included in the list of registers but is not included in the list of full width registers.

I don't believe that rflags is a valid register for x86. It only exits for x86-64. The register should be removed for the x86 architecture.

I also noticed that bnd0-3 are included in the register definitions for x86 but are not included in the full width registers.