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Cranelift: don't emit inside lowering rules for aarch64 (#4572)

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* Cranelift: Don't `emit` inside lowering rules in aarch64

The lowering rules should be "pure" and side-effect free, using helpers defined
in `inst.isle` to perform actual side effects like emitting instructions.

* Cranelift: use 80 width for section separators in aarch64 lowering rules
This commit is contained in:
Nick Fitzgerald
2022-08-01 16:43:42 -07:00
committed by GitHub
parent fb59de15af
commit c77bec4dcb
2 changed files with 16 additions and 8 deletions
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10
cranelift/codegen/src/isa/aarch64/inst.isle
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@@ -1905,6 +1905,16 @@
(decl uqxtn2 (Reg Reg ScalarSize) Reg)
(rule (uqxtn2 x y size) (vec_rr_narrow_high (VecRRNarrowOp.Uqxtn) x y size))
;; Helper for generating `fence` instructions.
(decl aarch64_fence () SideEffectNoResult)
(rule (aarch64_fence)
(SideEffectNoResult.Inst (MInst.Fence)))
;; Helper for generating `brk` instructions.
(decl brk () SideEffectNoResult)
(rule (brk)
(SideEffectNoResult.Inst (MInst.Brk)))
;; Helper for generating `addp` instructions.
(decl addp (Reg Reg VectorSize) Reg)
(rule (addp x y size) (vec_rrr (VecALUOp.Addp) x y size))