github.com/arthurnavah/cpuid/v2@v2.0.14/cpuid_arm64.s (about)

     1  // Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
     2  
     3  //+build arm64,!gccgo,!noasm,!appengine
     4  
     5  // See https://www.kernel.org/doc/Documentation/arm64/cpu-feature-registers.txt
     6  
     7  // func getMidr
     8  TEXT ·getMidr(SB), 7, $0
     9  	WORD $0xd5380000    // mrs x0, midr_el1         /* Main ID Register */
    10  	MOVD R0, midr+0(FP)
    11  	RET
    12  
    13  // func getProcFeatures
    14  TEXT ·getProcFeatures(SB), 7, $0
    15  	WORD $0xd5380400            // mrs x0, id_aa64pfr0_el1  /* Processor Feature Register 0 */
    16  	MOVD R0, procFeatures+0(FP)
    17  	RET
    18  
    19  // func getInstAttributes
    20  TEXT ·getInstAttributes(SB), 7, $0
    21  	WORD $0xd5380600            // mrs x0, id_aa64isar0_el1 /* Instruction Set Attribute Register 0 */
    22  	WORD $0xd5380621            // mrs x1, id_aa64isar1_el1 /* Instruction Set Attribute Register 1 */
    23  	MOVD R0, instAttrReg0+0(FP)
    24  	MOVD R1, instAttrReg1+8(FP)
    25  	RET
    26