Re: [PATCH v2] tests/tcg/s390x: Cleanup of mie3 tests.

[Richard Henderson]

On 3/1/22 10:22, David Miller wrote:
> However the constraint must be wrong there.
> Sorry about split message.
>
> On Tue, Mar 1, 2022 at 3:21 PM David Miller <dmiller423@gmail.com 
> <mailto:dmiller423@gmail.com>> wrote:
>
>     I used
>
>
>     #define Fi3(S, ASM) uint64_t S(uint64_t a, uint64_t b, uint64_t c) \
>     {                       \
>          uint64_t res= 0; \
>     asm volatile (          \
>          "ltgr %[c], %[c]\n" \
>          ASM                 \
>          "stg %[c], %[res] " \
>          : [res]"=&r" (res) \
>          : [a]"r" (a), \
>            [b]"r" (b), \
>            [c]"r" (c)       \
>     ); \
>          return res; \
>     }

The final stg is wrong and unnecessary.


r~