Re: Expansion of narrowing math built-ins into power instructions

[Segher Boessenkool]

On Wed, Aug 21, 2019 at 01:28:52PM -0500, Segher Boessenkool wrote:
> (define_insn "add_truncdfsf3"
>   [(set (match_operand:SF 0 "gpc_reg_operand" "=<Ff>,wa")
>       (unspec:SF [(match_operand:DF 1 "gpc_reg_operand" "%<Ff>,wa")
>                   (match_operand:DF 2 "gpc_reg_operand" "<Ff>,wa")]
>                  UNSPEC_ADD_TRUNCATE)]
>   "TARGET_HARD_FLOAT"
>   "@
>    fadds %0,%1,%2
>    xsaddsp %x0,%x1,%x2"
>   [(set_attr "type" "fp")
>    (set_attr "isa" "*,p8v")])

And not <Ff>...  f, d, d respectively (f for SF, d for DF).


Segher