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Use with_flags for 128-bith arith in aarch64

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Also move the `with_flags` bits and pieces to `prelude.isle` so it can
be shared between backends if necessary.
This commit is contained in:
Alex Crichton
2021-11-19 07:08:08 -08:00
parent 98ce029bbd
commit cbf539abb8
8 changed files with 437 additions and 212 deletions
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28
cranelift/codegen/src/isa/aarch64/inst.isle
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@@ -1420,6 +1420,34 @@
(_ Unit (emit (MInst.AluRRRR op dst src1 src2 src3))))
(writable_reg_to_reg dst)))
;; Helper for emitting `adds` instructions.
(decl add64_with_flags (Reg Reg) ProducesFlags)
(rule (add64_with_flags src1 src2)
(let ((dst WritableReg (temp_writable_reg $I64)))
(ProducesFlags.ProducesFlags (MInst.AluRRR (ALUOp.AddS64) dst src1 src2)
(writable_reg_to_reg dst))))
;; Helper for emitting `adc` instructions.
(decl adc64 (Reg Reg) ConsumesFlags)
(rule (adc64 src1 src2)
(let ((dst WritableReg (temp_writable_reg $I64)))
(ConsumesFlags.ConsumesFlags (MInst.AluRRR (ALUOp.Adc64) dst src1 src2)
(writable_reg_to_reg dst))))
;; Helper for emitting `subs` instructions.
(decl sub64_with_flags (Reg Reg) ProducesFlags)
(rule (sub64_with_flags src1 src2)
(let ((dst WritableReg (temp_writable_reg $I64)))
(ProducesFlags.ProducesFlags (MInst.AluRRR (ALUOp.SubS64) dst src1 src2)
(writable_reg_to_reg dst))))
;; Helper for emitting `sbc` instructions.
(decl sbc64 (Reg Reg) ConsumesFlags)
(rule (sbc64 src1 src2)
(let ((dst WritableReg (temp_writable_reg $I64)))
(ConsumesFlags.ConsumesFlags (MInst.AluRRR (ALUOp.Sbc64) dst src1 src2)
(writable_reg_to_reg dst))))
;; Immediate value helpers ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(decl imm (Type u64) Reg)