| // Copyright 2011 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 |
| // +build !faketime |
| |
| #include "go_asm.h" |
| #include "textflag.h" |
| #include "time_windows.h" |
| |
| TEXT time·now(SB),NOSPLIT,$0-24 |
| CMPB runtime·useQPCTime(SB), $0 |
| JNE useQPC |
| |
| MOVQ $_INTERRUPT_TIME, DI |
| MOVQ time_lo(DI), AX |
| IMULQ $100, AX |
| MOVQ AX, mono+16(FP) |
| |
| MOVQ $_SYSTEM_TIME, DI |
| MOVQ time_lo(DI), AX |
| MOVQ $116444736000000000, DI |
| SUBQ DI, AX |
| IMULQ $100, AX |
| |
| // generated code for |
| // func f(x uint64) (uint64, uint64) { return x/1000000000, x%1000000000 } |
| // adapted to reduce duplication |
| MOVQ AX, CX |
| MOVQ $1360296554856532783, AX |
| MULQ CX |
| ADDQ CX, DX |
| RCRQ $1, DX |
| SHRQ $29, DX |
| MOVQ DX, sec+0(FP) |
| IMULQ $1000000000, DX |
| SUBQ DX, CX |
| MOVL CX, nsec+8(FP) |
| RET |
| useQPC: |
| JMP runtime·nowQPC(SB) |
| RET |
