import quincy 17.2.0

[ceph.git] / ceph / src / arrow / go / parquet / internal / bmi / bitmap_bmi2_amd64.go

diff --git a/ceph/src/arrow/go/parquet/internal/bmi/bitmap_bmi2_amd64.go b/ceph/src/arrow/go/parquet/internal/bmi/bitmap_bmi2_amd64.go
new file mode 100644 (file)
index 0000000..66ffd8e
--- /dev/null
+++ b/ceph/src/arrow/go/parquet/internal/bmi/bitmap_bmi2_amd64.go
@@ -0,0 +1,50 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !noasm
+
+package bmi
+
+import "unsafe"
+
+//go:noescape
+func _extract_bits(bitmap, selectBitmap uint64) (res uint64)
+
+// extractBitsBMI2 uses BMI2 to call the pext instruction, Parallel Bits Extract
+// in order to quickly and efficiently extract the bits selected in a parallel
+// fashion. See the definition of the PEXT instruction for x86/x86-64 cpus
+func extractBitsBMI2(bitmap, selectBitmap uint64) uint64 {
+       return _extract_bits(bitmap, selectBitmap)
+}
+
+//go:noescape
+func _levels_to_bitmap(levels unsafe.Pointer, numLevels int, rhs int16) (res uint64)
+
+// greaterThanBitmapBMI2 builds a bitmap where each set bit indicates the corresponding level
+// is greater than the rhs value.
+func greaterThanBitmapBMI2(levels []int16, rhs int16) uint64 {
+       if len(levels) == 0 {
+               return 0
+       }
+
+       var (
+               p1 = unsafe.Pointer(&levels[0])
+               p2 = len(levels)
+               p3 = rhs
+       )
+
+       return _levels_to_bitmap(p1, p2, p3)
+}