time_windows_amd64.s

Documentation: runtime

     1// Copyright 2011 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 !faketime
     6
     7#include "go_asm.h"
     8#include "textflag.h"
     9#include "time_windows.h"
    10
    11TEXT time·now(SB),NOSPLIT,$0-24
    12	MOVQ	$_INTERRUPT_TIME, DI
    13	MOVQ	time_lo(DI), AX
    14	IMULQ	$100, AX
    15	MOVQ	AX, mono+16(FP)
    16
    17	MOVQ	$_SYSTEM_TIME, DI
    18	MOVQ	time_lo(DI), AX
    19	MOVQ	$116444736000000000, DI
    20	SUBQ	DI, AX
    21	IMULQ	$100, AX
    22
    23	// generated code for
    24	//	func f(x uint64) (uint64, uint64) { return x/1000000000, x%1000000000 }
    25	// adapted to reduce duplication
    26	MOVQ	AX, CX
    27	MOVQ	$1360296554856532783, AX
    28	MULQ	CX
    29	ADDQ	CX, DX
    30	RCRQ	$1, DX
    31	SHRQ	$29, DX
    32	MOVQ	DX, sec+0(FP)
    33	IMULQ	$1000000000, DX
    34	SUBQ	DX, CX
    35	MOVL	CX, nsec+8(FP)
    36	RET
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