github.com/neonyo/sys@v0.0.0-20230720094341-b1ee14be3ce8/cpu/cpu_arm64.s (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 gc
     6  // +build gc
     7  
     8  #include "textflag.h"
     9  
    10  // func getisar0() uint64
    11  TEXT ·getisar0(SB),NOSPLIT,$0-8
    12  	// get Instruction Set Attributes 0 into x0
    13  	// mrs x0, ID_AA64ISAR0_EL1 = d5380600
    14  	WORD	$0xd5380600
    15  	MOVD	R0, ret+0(FP)
    16  	RET
    17  
    18  // func getisar1() uint64
    19  TEXT ·getisar1(SB),NOSPLIT,$0-8
    20  	// get Instruction Set Attributes 1 into x0
    21  	// mrs x0, ID_AA64ISAR1_EL1 = d5380620
    22  	WORD	$0xd5380620
    23  	MOVD	R0, ret+0(FP)
    24  	RET
    25  
    26  // func getpfr0() uint64
    27  TEXT ·getpfr0(SB),NOSPLIT,$0-8
    28  	// get Processor Feature Register 0 into x0
    29  	// mrs x0, ID_AA64PFR0_EL1 = d5380400
    30  	WORD	$0xd5380400
    31  	MOVD	R0, ret+0(FP)
    32  	RET