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x64: Add shuffle specialization for palignr (#5999)

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* x64: Add `shuffle` specialization for `palignr`

This commit adds specializations for the `palignr` instruction to the
x64 backend to specialize some more patterns of byte shuffles.

* Fix tests
This commit is contained in:
Alex Crichton
2023-03-13 16:01:24 -05:00
committed by GitHub
parent bba49646c3
commit e2a6fe99c2
6 changed files with 218 additions and 18 deletions
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8
cranelift/codegen/src/isa/x64/inst.isle
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@@ -3231,14 +3231,14 @@
dst))
;; Helper for creating `palignr` instructions.
(decl x64_palignr (Xmm XmmMem u8 OperandSize) Xmm)
(rule 0 (x64_palignr src1 src2 imm size)
(decl x64_palignr (Xmm XmmMem u8) Xmm)
(rule 0 (x64_palignr src1 src2 imm)
(xmm_rm_r_imm (SseOpcode.Palignr)
src1
src2
imm
size))
(rule 1 (x64_palignr src1 src2 imm size)
(OperandSize.Size32)))
(rule 1 (x64_palignr src1 src2 imm)
(if-let $true (has_avx))
(xmm_rmr_imm_vex (AvxOpcode.Vpalignr) src1 src2 imm))