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cranelift: Implement missing i128 rotates on AArch64 (#4866)

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Afonso Bordado
2022-09-07 19:11:47 +01:00
committed by GitHub
parent dd07e354b4
commit f57b4412ec
2 changed files with 123 additions and 6 deletions
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15
cranelift/codegen/src/isa/aarch64/lower.isle
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@@ -1282,7 +1282,8 @@
;; General 8/16-bit case.
(rule (lower (has_type (fits_in_16 ty) (rotl x y)))
(let ((neg_shift Reg (sub $I32 (zero_reg) y)))
(let ((amt Reg (value_regs_get y 0))
(neg_shift Reg (sub $I32 (zero_reg) amt)))
(small_rotr ty (put_in_reg_zext32 x) neg_shift)))
;; Specialization for the 8/16-bit case when the rotation amount is an immediate.
@@ -1300,12 +1301,14 @@
;; General 32-bit case.
(rule (lower (has_type $I32 (rotl x y)))
(let ((neg_shift Reg (sub $I32 (zero_reg) y)))
(let ((amt Reg (value_regs_get y 0))
(neg_shift Reg (sub $I32 (zero_reg) amt)))
(a64_rotr $I32 x neg_shift)))
;; General 64-bit case.
(rule (lower (has_type $I64 (rotl x y)))
(let ((neg_shift Reg (sub $I64 (zero_reg) y)))
(let ((amt Reg (value_regs_get y 0))
(neg_shift Reg (sub $I64 (zero_reg) amt)))
(a64_rotr $I64 x neg_shift)))
;; Specialization for the 32-bit case when the rotation amount is an immediate.
@@ -1338,15 +1341,15 @@
;; General 8/16-bit case.
(rule (lower (has_type (fits_in_16 ty) (rotr x y)))
(small_rotr ty (put_in_reg_zext32 x) y))
(small_rotr ty (put_in_reg_zext32 x) (value_regs_get y 0)))
;; General 32-bit case.
(rule (lower (has_type $I32 (rotr x y)))
(a64_rotr $I32 x y))
(a64_rotr $I32 x (value_regs_get y 0)))
;; General 64-bit case.
(rule (lower (has_type $I64 (rotr x y)))
(a64_rotr $I64 x y))
(a64_rotr $I64 x (value_regs_get y 0)))
;; Specialization for the 8/16-bit case when the rotation amount is an immediate.
(rule (lower (has_type (fits_in_16 ty) (rotr x (iconst k))))