| // Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. |
| |
| //+build arm64,!gccgo,!noasm,!appengine |
| |
| // See https://www.kernel.org/doc/Documentation/arm64/cpu-feature-registers.txt |
| |
| // func getMidr |
| TEXT ·getMidr(SB), 7, $0 |
| WORD $0xd5380000 // mrs x0, midr_el1 /* Main ID Register */ |
| MOVD R0, midr+0(FP) |
| RET |
| |
| // func getProcFeatures |
| TEXT ·getProcFeatures(SB), 7, $0 |
| WORD $0xd5380400 // mrs x0, id_aa64pfr0_el1 /* Processor Feature Register 0 */ |
| MOVD R0, procFeatures+0(FP) |
| RET |
| |
| // func getInstAttributes |
| TEXT ·getInstAttributes(SB), 7, $0 |
| WORD $0xd5380600 // mrs x0, id_aa64isar0_el1 /* Instruction Set Attribute Register 0 */ |
| WORD $0xd5380621 // mrs x1, id_aa64isar1_el1 /* Instruction Set Attribute Register 1 */ |
| MOVD R0, instAttrReg0+0(FP) |
| MOVD R1, instAttrReg1+8(FP) |
| RET |
| |