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// 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