Amanieu added a comment.
I fully agree that this likely wasn't intentional, but this is still very
useful for code that can't use FP registers for whatever reason (e.g. kernels).
Regarding the ABI, it doesn't need to be officially defined: it just needs to
be compatible with other code compiled
dmgreen added a comment.
> With -mgeneral-regs-only, all arguments are passed in GPRs, so we should use
> gr_top/gr_offs in va_list even for floating-point types.
I don't believe that -mgeneral-regs-only was intended to define an ABI passing
floats in GPRs for AArch64. If it has that is likely
Amanieu added a comment.
Currently using Clang with -mgeneral-regs-only generates perfectly fine
soft-float AArch64, with the except of the va_arg() implementation which is
fixed here. In fact Rust even has a aarch64-unknown-none-softfloat which relies
on this behavior in LLVM. I believe this b
MaskRay added a comment.
It seems that the intention of `-mgeneral-regs-only` is to prevent FP and SIMD
register use.
aarch64-linux-gnu-gcc has such an error
error: ‘-mgeneral-regs-only’ is incompatible with the use of floating-point
types
Clang doesn't reject FP in Sema yet, but I think ch
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With -mgeneral-regs-only, all argume
