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Editing: time_windows_arm64.s
// Copyright 2018 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build !faketime #include "go_asm.h" #include "textflag.h" #include "time_windows.h" TEXT time·now(SB),NOSPLIT,$0-24 MOVD $_INTERRUPT_TIME, R3 MOVD time_lo(R3), R0 MOVD $100, R1 MUL R1, R0 MOVD R0, mono+16(FP) MOVD $_SYSTEM_TIME, R3 MOVD time_lo(R3), R0 // convert to Unix epoch (but still 100ns units) #define delta 116444736000000000 SUB $delta, R0 // Convert to nSec MOVD $100, R1 MUL R1, R0 // Code stolen from compiler output for: // // var x uint64 // func f() (sec uint64, nsec uint32) { return x / 1000000000, uint32(x % 1000000000) } // LSR $1, R0, R1 MOVD $-8543223759426509416, R2 UMULH R1, R2, R1 LSR $28, R1, R1 MOVD R1, sec+0(FP) MOVD $1000000000, R2 MSUB R1, R0, R2, R0 MOVW R0, nsec+8(FP) RET
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