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register_set: do not shift when ITEM_WIDTH is 64

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Issue #2507.
This commit is contained in:
Josef Söntgen 2017-08-24 14:37:56 +02:00 committed by Christian Helmuth
parent 7f29eff75a
commit 404a82d5ee
1 changed files with 2 additions and 1 deletions
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3
repos/base/include/util/register_set.h
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@ -289,7 +289,8 @@ class Genode::Register_set : Noncopyable
ITEM_WIDTH = _ITEM_WIDTH,
ITEM_WIDTH_LOG2 = Item::WIDTH_LOG2,
MAX_INDEX = ITEMS - 1,
ITEM_MASK = (1ULL << ITEM_WIDTH) - 1,
/* prevent shifting more than bit width by setting all bits explicitly */
ITEM_MASK = (ITEM_WIDTH == 64) ? ~0ULL : (1ULL << ITEM_WIDTH) - 1,
};
/* analogous to 'Register_set::Register::Register_base' */