[PATCH] D74734: [AArch64][SVE] Add the SVE dupq_lane intrinsic
Kerry McLaughlin via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Mon Feb 17 10:58:26 PST 2020
kmclaughlin created this revision.
kmclaughlin added reviewers: sdesmalen, c-rhodes, cameron.mcinally, efriedma, dancgr.
Herald added subscribers: psnobl, rkruppe, hiraditya, kristof.beyls, tschuett.
Herald added a reviewer: rengolin.
Herald added a project: LLVM.
Implements the @llvm.aarch64.sve.dupq.lane intrinsic.
As specified in the ACLE, the behaviour of:
svdupq_lane_u64(data, index)
...is identical to:
svtbl(data, svadd_x(svptrue_b64(),
svand_x(svptrue_b64(), svindex_u64(0, 1), 1),
index * 2))
If the index is in the range [0,3], the operation is equivalent
to a single DUP (.q) instruction.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D74734
Files:
llvm/include/llvm/IR/IntrinsicsAArch64.td
llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
llvm/lib/Target/AArch64/AArch64ISelLowering.h
llvm/test/CodeGen/AArch64/sve-intrinsics-perm-select.ll
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