diff options
Diffstat (limited to 'src/internal/runtime/maps')
| -rw-r--r-- | src/internal/runtime/maps/group.go | 6 | ||||
| -rw-r--r-- | src/internal/runtime/maps/table.go | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/src/internal/runtime/maps/group.go b/src/internal/runtime/maps/group.go index c8d38ba27c..a56d32aca0 100644 --- a/src/internal/runtime/maps/group.go +++ b/src/internal/runtime/maps/group.go @@ -215,6 +215,12 @@ func (g ctrlGroup) matchFull() bitset { return ctrlGroupMatchFull(g) } +// anyFull reports whether any slots in the group are full. +func (g ctrlGroup) anyFull() bool { + // A slot is full iff bit 7 is unset. Test whether any slot has bit 7 unset. + return (^g)&bitsetMSB != 0 +} + // Portable implementation of matchFull. // // Note: On AMD64, this is an intrinsic implemented with SIMD instructions. See diff --git a/src/internal/runtime/maps/table.go b/src/internal/runtime/maps/table.go index 49f392b8ae..a8160befd2 100644 --- a/src/internal/runtime/maps/table.go +++ b/src/internal/runtime/maps/table.go @@ -606,7 +606,7 @@ func (t *table) Clear(typ *abi.MapType) { } for i := uint64(0); i <= t.groups.lengthMask; i++ { g := t.groups.group(typ, i) - if g.ctrls().matchFull() != 0 { + if g.ctrls().anyFull() { typedmemclr(typ.Group, g.data) } g.ctrls().setEmpty() |