nv50/ir: fix cas lowering for 64 bit
Signed-off-by: Karol Herbst <kherbst@redhat.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6433>
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@ -1734,9 +1734,10 @@ NVC0LoweringPass::handleCasExch(Instruction *cas, bool needCctl)
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// happen elsewhere in the universe.
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// Also, it sometimes returns the new value instead of the old one
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// under mysterious circumstances.
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Value *dreg = bld.getSSA(8);
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DataType ty = typeOfSize(typeSizeof(cas->dType) * 2);
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Value *dreg = bld.getSSA(typeSizeof(ty));
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bld.setPosition(cas, false);
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bld.mkOp2(OP_MERGE, TYPE_U64, dreg, cas->getSrc(1), cas->getSrc(2));
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bld.mkOp2(OP_MERGE, ty, dreg, cas->getSrc(1), cas->getSrc(2));
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cas->setSrc(1, dreg);
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cas->setSrc(2, dreg);
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}
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