cpu_arm64.s (771B)
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