Re: [Qemu-devel] [PATCH v2 11/20] fpu/softfloat: re-factor add/sub

[Richard Henderson]

On 01/12/2018 07:57 AM, Peter Maydell wrote:
> I see we're passing and returning decomposed_parts structs everywhere
> rather than pointers to them. How well does that compile? (I guess
> everything ends up inlining...)

For the x86_64 abi at least, the structure (as defined with bitfields) is 128
bits and is passed and returned in registers.

I believe the same to be true for the aarch64 abi.  I'd have to do some
research to determine what happens for the other 64-bit hosts.


r~