The feature gate for the issue is #![feature(asm_experimental_arch)].

Summary

This feature tracks asm! and global_asm! support for the following architectures:

• Arm64ec: Stabilize Arm64EC inline assembly #131781
• NVPTX
• PowerPC
• Hexagon
• MIPS32r2 and MIPS64r2
• wasm32
• BPF
• SPIR-V
• AVR
• MSP430
• s390x: Stabilize s390x inline assembly #131258

Status

Each architecture needs to be reviewed before stabilization:

• It must have clobber_abi.
• It must be possible to clobber every register that is normally clobbered by a function call.
• Generally review that the exposed register classes make sense.