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authorMitch Hayenga <mitch.hayenga@arm.com>2014-09-03 07:42:44 -0400
committerMitch Hayenga <mitch.hayenga@arm.com>2014-09-03 07:42:44 -0400
commitbb1e6cf7c4d64a56b80d3d69ba25e8ff7d455bbd (patch)
tree95f328eb1a3c25bb8e67136e5b1ad1173a136143 /src/cpu/o3/impl.hh
parent4a3f11149d791284a012af71067f6b2199aa165c (diff)
downloadgem5-bb1e6cf7c4d64a56b80d3d69ba25e8ff7d455bbd.tar.xz
arm: Fix v8 neon latency issue for loads/stores
Neon memory ops that operate on multiple registers currently have very poor performance because of interleave/deinterleave micro-ops. This patch marks the deinterleave/interleave micro-ops as "No_OpClass" such that they take minumum cycles to execute and are never resource constrained. Additionaly the micro-ops over-read registers. Although one form may need to read up to 20 sources, not all do. This adds in new forms so false dependencies are not modeled. Instructions read their minimum number of sources.
Diffstat (limited to 'src/cpu/o3/impl.hh')
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