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 ID_AA64ISAR0_EL1, R0
13 MOVD R0, ret+0(FP)
14 RET
15 16 // func getisar1() uint64
17 TEXT ·getisar1(SB),NOSPLIT,$0-8
18 // get Instruction Set Attributes 1 into x0
19 MRS ID_AA64ISAR1_EL1, R0
20 MOVD R0, ret+0(FP)
21 RET
22 23 // func getpfr0() uint64
24 TEXT ·getpfr0(SB),NOSPLIT,$0-8
25 // get Processor Feature Register 0 into x0
26 MRS ID_AA64PFR0_EL1, R0
27 MOVD R0, ret+0(FP)
28 RET
29 30 // func getzfr0() uint64
31 TEXT ·getzfr0(SB),NOSPLIT,$0-8
32 // get SVE Feature Register 0 into x0
33 MRS ID_AA64ZFR0_EL1, R0
34 MOVD R0, ret+0(FP)
35 RET
36