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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
| commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
| tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/runtime/time_windows_amd64.s | |
| parent | Initial commit. (diff) | |
| download | golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip | |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | src/runtime/time_windows_amd64.s | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/runtime/time_windows_amd64.s b/src/runtime/time_windows_amd64.s new file mode 100644 index 0000000..226f2b5 --- /dev/null +++ b/src/runtime/time_windows_amd64.s @@ -0,0 +1,42 @@ +// 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 + +#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 |