[AArch64] Cortex-A57 FDIV/FSQRT scheduling fix (W-unit)
According to the Cortex-A57 doc, FDIV/FSQRT instructions should use F0 unit
(W-unit in AArch64SchedA57.td, the same as cryptography instructions),
not F1 unit (X-unit in td, like ASIMD absolute diff accum SABA/UABA).
This patch changes FDIV/FSQRT scheduling declarations to use A57UnitW
instead of A57UnitX. Also, latencies for those instructions are
corrected.
Patch by Andrew Zhogin.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290426
91177308-0d34-0410-b5e6-
96231b3b80d8
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