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Add multi_lane precondition to bitselect => {u,s}{min,max} rewrite (#6201)

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Karl Meakin
2023-04-12 20:04:30 +01:00
committed by GitHub
parent d1d381e298
commit 42528d82b8
1 changed files with 16 additions and 16 deletions
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32
cranelift/codegen/src/opts/selects.isle
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@@ -25,24 +25,24 @@
(rule (simplify (select ty (uge _ x y) y x)) (umin ty x y))
;; Transform bitselect-of-icmp into {u,s}{min,max} instructions where possible.
(rule (simplify (bitselect ty (sgt _ x y) x y)) (smax ty x y))
(rule (simplify (bitselect ty (sge _ x y) x y)) (smax ty x y))
(rule (simplify (bitselect ty (ugt _ x y) x y)) (umax ty x y))
(rule (simplify (bitselect ty (uge _ x y) x y)) (umax ty x y))
(rule (simplify (bitselect ty (slt _ x y) x y)) (smin ty x y))
(rule (simplify (bitselect ty (sle _ x y) x y)) (smin ty x y))
(rule (simplify (bitselect ty (ult _ x y) x y)) (umin ty x y))
(rule (simplify (bitselect ty (ule _ x y) x y)) (umin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (sgt _ x y) x y)) (smax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (sge _ x y) x y)) (smax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (ugt _ x y) x y)) (umax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (uge _ x y) x y)) (umax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (slt _ x y) x y)) (smin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (sle _ x y) x y)) (smin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (ult _ x y) x y)) (umin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (ule _ x y) x y)) (umin ty x y))
;; These are the same rules as above, but when the operands for select are swapped
(rule (simplify (bitselect ty (slt _ x y) y x)) (smax ty x y))
(rule (simplify (bitselect ty (sle _ x y) y x)) (smax ty x y))
(rule (simplify (bitselect ty (ult _ x y) y x)) (umax ty x y))
(rule (simplify (bitselect ty (ule _ x y) y x)) (umax ty x y))
(rule (simplify (bitselect ty (sgt _ x y) y x)) (smin ty x y))
(rule (simplify (bitselect ty (sge _ x y) y x)) (smin ty x y))
(rule (simplify (bitselect ty (ugt _ x y) y x)) (umin ty x y))
(rule (simplify (bitselect ty (uge _ x y) y x)) (umin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (slt _ x y) y x)) (smax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (sle _ x y) y x)) (smax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (ult _ x y) y x)) (umax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (ule _ x y) y x)) (umax ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (sgt _ x y) y x)) (smin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (sge _ x y) y x)) (smin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (ugt _ x y) y x)) (umin ty x y))
(rule (simplify (bitselect ty @ (multi_lane _ _) (uge _ x y) y x)) (umin ty x y))
;; For floats convert fcmp lt into pseudo_min and gt into pseudo_max
;;