On Mon, Jun 12, 2017 at 02:16:44PM +0100, Wilco Dijkstra wrote: > The Cortex-A53 scheduler model of FMAC bypass is not quite right > for FMAC to FMAC forwarding. Experiments also show the latencies of > FP operations are too high as well. Rather than adding more bypasses, > adjust the latencies of FP instructions to get a better schedule on > average. As a result SPECFP2006 is 1.1% faster.
>From an AArch64 perspective this is OK, but it will need an ARM OK too, as it is shared code. Thanks, James > Passes AArch64 and ARM bootstrap and regress. > > ChangeLog: > 2017-05-30 Wilco Dijkstra <wdijk...@arm.com> > > * config/arm/cortex-a53.md (cortex_a53_fpalu) Adjust latency. > (cortex_a53_fconst): Likewise. > (cortex_a53_fpmul): Likewise. > (cortex_a53_f_load_64): Likewise. > (cortex_a53_f_load_many): Likewise. > (cortex_a53_advsimd_alu): Likewise. > (cortex_a53_advsimd_alu_q): Likewise. > (cortex_a53_advsimd_mul): Likewise. > (cortex_a53_advsimd_mul_q): Likewise. > (fpmac bypass): Add new bypass for fpmac-fpmac case. > Add missing fmul, r2f_cvt and fconst cases. > --
