x86: separate AVX10.1-aux from AVX10.2
Discussion on naming conventions for AVX10.1-aux and AVX10.2-aux feature bits in the assembler, seeking AMD's opinion.
This email is a follow-up to a discussion about naming conventions for new x86 instruction set extensions in the GNU assembler. The core of the discussion is the naming of AVX10.1-aux feature bits. Jiang, Haochen, references a previous exchange where Jan Beulich suggested aligning the name with documentation, potentially using avx10_v1_aux. Haochen leans towards avx10.1aux if v1 is not preferred, but notes that this is an AMD-proposed feature and they need to confirm their naming preference to ensure consistency with AVX10_V2_AUX.
- reviewer
Suggested potentially aligning the name with documentation, e.g., 'avx10_v1_aux'.
“Maybe avx10_v1_aux instead of avx10.1aux to align with documentation?”
- proposer
Prefers 'avx10.1aux' if 'v1' is not used and seeks AMD's opinion on naming for consistency.
“If we do not want to use v1, then the current name is definitely a win. This is an AMD proposed feature bit actually, while Intel will emulate that bit to avoid break on HW. So, let's wait AMD folks to share their opinion on option names. We also need to make sure that it is the same naming convention as AVX10_V2_AUX.”
- proposer
Pings for an update on AMD's opinion regarding naming conventions for AVX10 auxiliary extensions.
“Ping for this discussion, Ganesh, what is AMD's opinion on this? Do you want to keep the "v" in name? Whatever it is, we need to keep the naming convention same between AVX10_V1_AUX and AVX10_V2_AUX.”
Technical Tradeoffs
- Choosing `avx10.1aux` over `avx10_v1_aux` might be simpler for direct use but less aligned with potential documentation standards.
- Ensuring naming consistency across related extensions is important for usability but may require waiting for external input (from AMD).
In Details
This is an iterative discussion concerning the naming of new CPU feature bits within the GNU Assembler (gas) support for x86 processors. Specifically, it relates to the AVX10 instruction set extensions. The patch introduces AVX10_1_AUX. The debate is about whether to name this feature bit avx10.1aux (as proposed) or avx10_v1_aux (suggested for better alignment with documentation). The crucial point is that this is an AMD-proposed feature, and clarity is needed on AMD's preferred naming convention to ensure consistency with other AVX10 variants (like AVX10_V2_AUX) and to avoid regres…
- x86
- A family of instruction set architectures for computer processors, widely used in desktop and server computers.
- AVX10
- A proposed instruction set extension for x86 processors, extending AVX-512 capabilities.
- AVX10.1-aux
- A specific auxiliary capability related to the AVX10.1 instruction set.
- AVX10.2
- Another iteration or variant of the AVX10 instruction set extensions.
- feature bit
- A flag or bit in a CPU's status register or architectural definition that indicates the presence or availability of a particular instruction set extension or capability.
- GNU Assembler (gas)
- The assembler component of the GNU Binutils, responsible for converting assembly language code into machine code.
- naming convention
- A set of rules to follow when naming entities such as variables, functions, classes, etc., in programming.