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x64: Migrate get_pinned_reg, set_pinned_reg, vconst, and raw_bitcast to ISLE (#4763)

Browse Source 
https://github.com/bytecodealliance/wasmtime/pull/4763
This commit is contained in:
Trevor Elliott
2022-08-23 16:32:00 -07:00
committed by GitHub
parent cb918e8a24
commit 4bdfa76370
8 changed files with 100 additions and 90 deletions
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25
cranelift/codegen/src/isa/x64/lower.isle
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@@ -3485,3 +3485,28 @@
(let ((res ValueRegs (mul_hi $I64 $true a b))
(hi Gpr (value_regs_get_gpr res 1)))
hi))
;; Rules for `get_pinned_reg` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(rule (lower (get_pinned_reg))
(read_pinned_gpr))
;; Rules for `set_pinned_reg` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(rule (lower (set_pinned_reg a @ (value_type ty)))
(side_effect (write_pinned_gpr a)))
;; Rules for `vconst` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(rule (lower (has_type ty (vconst const)))
;; TODO use Inst::gen_constant() instead.
(x64_xmm_load_const ty (const_to_vconst const)))
;; Rules for `raw_bitcast` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; A raw_bitcast is just a mechanism for correcting the type of V128 values (see
;; https://github.com/bytecodealliance/wasmtime/issues/1147). As such, this IR
;; instruction should emit no machine code but a move is necessary to give the
;; register allocator a definition for the output virtual register.
(rule (lower (raw_bitcast val))
(put_in_regs val))