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
33
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