github.com/JimmyHuang454/JLS-go@v0.0.0-20230831150107-90d536585ba0/cpu/cpu_mips64x.go (about)

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build mips64 || mips64le
     6  
     7  package cpu
     8  
     9  const CacheLinePadSize = 32
    10  
    11  // This is initialized by archauxv and should not be changed after it is
    12  // initialized.
    13  var HWCap uint
    14  
    15  // HWCAP bits. These are exposed by the Linux kernel 5.4.
    16  const (
    17  	// CPU features
    18  	hwcap_MIPS_MSA = 1 << 1
    19  )
    20  
    21  func doinit() {
    22  	options = []option{
    23  		{Name: "msa", Feature: &MIPS64X.HasMSA},
    24  	}
    25  
    26  	// HWCAP feature bits
    27  	MIPS64X.HasMSA = isSet(HWCap, hwcap_MIPS_MSA)
    28  }
    29  
    30  func isSet(hwc uint, value uint) bool {
    31  	return hwc&value != 0
    32  }