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 7 #include "textflag.h"
8 9 // func getisar0() uint64
10 TEXT ·getisar0(SB),NOSPLIT,$0-8
11 // get Instruction Set Attributes 0 into x0
12 // mrs x0, ID_AA64ISAR0_EL1 = d5380600
13 WORD $0xd5380600
14 MOVD R0, ret+0(FP)
15 RET
16 17 // func getisar1() uint64
18 TEXT ·getisar1(SB),NOSPLIT,$0-8
19 // get Instruction Set Attributes 1 into x0
20 // mrs x0, ID_AA64ISAR1_EL1 = d5380620
21 WORD $0xd5380620
22 MOVD R0, ret+0(FP)
23 RET
24 25 // func getpfr0() uint64
26 TEXT ·getpfr0(SB),NOSPLIT,$0-8
27 // get Processor Feature Register 0 into x0
28 // mrs x0, ID_AA64PFR0_EL1 = d5380400
29 WORD $0xd5380400
30 MOVD R0, ret+0(FP)
31 RET
32 33 // func getzfr0() uint64
34 TEXT ·getzfr0(SB),NOSPLIT,$0-8
35 // get SVE Feature Register 0 into x0
36 // mrs x0, ID_AA64ZFR0_EL1 = d5380480
37 WORD $0xd5380480
38 MOVD R0, ret+0(FP)
39 RET
40