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| author | Ian Lance Taylor <iant@golang.org> | 2021-04-27 16:04:56 -0700 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2021-04-28 20:16:36 +0000 |
| commit | b36596b14f8d3bee586479323c56b5db416a49e5 (patch) | |
| tree | 3a1c6f695e50e811844070decfc8b1e1d26e086b /src/runtime/sys_windows_arm64.s | |
| parent | 07e006dd9322cc484303e1bef3d58c7e51d4f92c (diff) | |
| download | go-b36596b14f8d3bee586479323c56b5db416a49e5.tar.gz go-b36596b14f8d3bee586479323c56b5db416a49e5.zip | |
runtime: move Windows time.now implementations into separate files
This is a step toward separating whether time.now is implemented in
assembly from whether we are using faketime.
Change-Id: I8bf059b44a103b034835e3d3b799319cc05e9552
Reviewed-on: https://go-review.googlesource.com/c/go/+/314273
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Diffstat (limited to 'src/runtime/sys_windows_arm64.s')
| -rw-r--r-- | src/runtime/sys_windows_arm64.s | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/src/runtime/sys_windows_arm64.s b/src/runtime/sys_windows_arm64.s index aa9ea7ed98..33ac091e12 100644 --- a/src/runtime/sys_windows_arm64.s +++ b/src/runtime/sys_windows_arm64.s @@ -429,62 +429,6 @@ loop: useQPC: B runtime·nanotimeQPC(SB) // tail call -TEXT time·now(SB),NOSPLIT|NOFRAME,$0-24 - MOVB runtime·useQPCTime(SB), R0 - CMP $0, R0 - BNE useQPC - MOVD $_INTERRUPT_TIME, R3 -loop: - MOVWU time_hi1(R3), R1 - MOVWU time_lo(R3), R0 - MOVWU time_hi2(R3), R2 - CMP R1, R2 - BNE loop - - // wintime = R1:R0, multiply by 100 - ORR R1<<32, R0 - MOVD $100, R1 - MUL R1, R0 - MOVD R0, mono+16(FP) - - MOVD $_SYSTEM_TIME, R3 -wall: - MOVWU time_hi1(R3), R1 - MOVWU time_lo(R3), R0 - MOVWU time_hi2(R3), R2 - CMP R1, R2 - BNE wall - - // w = R1:R0 in 100ns units - // convert to Unix epoch (but still 100ns units) - #define delta 116444736000000000 - ORR R1<<32, R0 - 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 % 100000000) } - // - LSR $1, R0, R1 - MOVD $-8543223759426509416, R2 - UMULH R2, R1, R1 - LSR $28, R1, R1 - MOVD R1, sec+0(FP) - MOVD $-6067343680855748867, R1 - UMULH R0, R1, R1 - LSR $26, R1, R1 - MOVD $100000000, R2 - MSUB R1, R0, R2, R0 - MOVW R0, nsec+8(FP) - RET -useQPC: - B runtime·nowQPC(SB) // tail call - // This is called from rt0_go, which runs on the system stack // using the initial stack allocated by the OS. // It calls back into standard C using the BL below. |