| // 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. |
| |
| //go:build amd64 && !noasm && !appengine |
| // +build amd64,!noasm,!appengine |
| |
| #include "textflag.h" |
| |
| // func _packBoolsAVX2(values, dst unsafe.Pointer, length int) |
| TEXT ยท_packBoolsAVX2(SB), NOSPLIT, $0-24 |
| MOVQ values+0(FP), DI |
| MOVQ dst+8(FP), SI |
| MOVQ length+16(FP), CX |
| |
| // Y1 is zero. The input is a []bool, so comparing it with zero |
| // and inverting the result produces one all-ones byte per true value. |
| VPXOR Y1, Y1, Y1 |
| |
| loop: |
| CMPQ CX, $32 |
| JB done |
| |
| VMOVDQU (DI), Y0 |
| VPCMPEQB Y1, Y0, Y2 |
| VPCMPEQB Y1, Y1, Y3 |
| VPXOR Y2, Y3, Y2 |
| VPMOVMSKB Y2, DX |
| MOVL DX, (SI) |
| |
| ADDQ $32, DI |
| ADDQ $4, SI |
| SUBQ $32, CX |
| JMP loop |
| |
| done: |
| VZEROUPPER |
| RET |
