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-rw-r--r--src/runtime/os_windows.go78
-rw-r--r--src/runtime/sys_windows_386.s5
-rw-r--r--src/runtime/sys_windows_amd64.s5
-rw-r--r--src/runtime/sys_windows_arm.s7
-rw-r--r--src/runtime/sys_windows_arm64.s5
-rw-r--r--src/runtime/time_windows_386.s5
-rw-r--r--src/runtime/time_windows_amd64.s6
-rw-r--r--src/runtime/time_windows_arm.s6
-rw-r--r--src/runtime/time_windows_arm64.s6
9 files changed, 0 insertions, 123 deletions
diff --git a/src/runtime/os_windows.go b/src/runtime/os_windows.go
index a4d902d083..41875d2264 100644
--- a/src/runtime/os_windows.go
+++ b/src/runtime/os_windows.go
@@ -91,14 +91,12 @@ var (
_GetStdHandle,
_GetSystemDirectoryA,
_GetSystemInfo,
- _GetSystemTimeAsFileTime,
_GetThreadContext,
_SetThreadContext,
_LoadLibraryExW,
_LoadLibraryW,
_PostQueuedCompletionStatus,
_QueryPerformanceCounter,
- _QueryPerformanceFrequency,
_RaiseFailFastException,
_ResumeThread,
_SetConsoleCtrlHandler,
@@ -300,11 +298,6 @@ func loadOptionalSyscalls() {
if _WSAGetOverlappedResult == nil {
throw("WSAGetOverlappedResult not found")
}
-
- if windowsFindfunc(n32, []byte("wine_get_version\000")) != nil {
- // running on Wine
- initWine(k32)
- }
}
func monitorSuspendResume() {
@@ -548,77 +541,6 @@ func osinit() {
stdcall2(_SetProcessPriorityBoost, currentProcess, 1)
}
-// useQPCTime controls whether time.now and nanotime use QueryPerformanceCounter.
-// This is only set to 1 when running under Wine.
-var useQPCTime uint8
-
-var qpcStartCounter int64
-var qpcMultiplier int64
-
-//go:nosplit
-func nanotimeQPC() int64 {
- var counter int64 = 0
- stdcall1(_QueryPerformanceCounter, uintptr(unsafe.Pointer(&counter)))
-
- // returns number of nanoseconds
- return (counter - qpcStartCounter) * qpcMultiplier
-}
-
-//go:nosplit
-func nowQPC() (sec int64, nsec int32, mono int64) {
- var ft int64
- stdcall1(_GetSystemTimeAsFileTime, uintptr(unsafe.Pointer(&ft)))
-
- t := (ft - 116444736000000000) * 100
-
- sec = t / 1000000000
- nsec = int32(t - sec*1000000000)
-
- mono = nanotimeQPC()
- return
-}
-
-func initWine(k32 uintptr) {
- _GetSystemTimeAsFileTime = windowsFindfunc(k32, []byte("GetSystemTimeAsFileTime\000"))
- if _GetSystemTimeAsFileTime == nil {
- throw("could not find GetSystemTimeAsFileTime() syscall")
- }
-
- _QueryPerformanceCounter = windowsFindfunc(k32, []byte("QueryPerformanceCounter\000"))
- _QueryPerformanceFrequency = windowsFindfunc(k32, []byte("QueryPerformanceFrequency\000"))
- if _QueryPerformanceCounter == nil || _QueryPerformanceFrequency == nil {
- throw("could not find QPC syscalls")
- }
-
- // We can not simply fallback to GetSystemTimeAsFileTime() syscall, since its time is not monotonic,
- // instead we use QueryPerformanceCounter family of syscalls to implement monotonic timer
- // https://msdn.microsoft.com/en-us/library/windows/desktop/dn553408(v=vs.85).aspx
-
- var tmp int64
- stdcall1(_QueryPerformanceFrequency, uintptr(unsafe.Pointer(&tmp)))
- if tmp == 0 {
- throw("QueryPerformanceFrequency syscall returned zero, running on unsupported hardware")
- }
-
- // This should not overflow, it is a number of ticks of the performance counter per second,
- // its resolution is at most 10 per usecond (on Wine, even smaller on real hardware), so it will be at most 10 millions here,
- // panic if overflows.
- if tmp > (1<<31 - 1) {
- throw("QueryPerformanceFrequency overflow 32 bit divider, check nosplit discussion to proceed")
- }
- qpcFrequency := int32(tmp)
- stdcall1(_QueryPerformanceCounter, uintptr(unsafe.Pointer(&qpcStartCounter)))
-
- // Since we are supposed to run this time calls only on Wine, it does not lose precision,
- // since Wine's timer is kind of emulated at 10 Mhz, so it will be a nice round multiplier of 100
- // but for general purpose system (like 3.3 Mhz timer on i7) it will not be very precise.
- // We have to do it this way (or similar), since multiplying QPC counter by 100 millions overflows
- // int64 and resulted time will always be invalid.
- qpcMultiplier = int64(timediv(1000000000, qpcFrequency, nil))
-
- useQPCTime = 1
-}
-
//go:nosplit
func getRandomData(r []byte) {
n := 0
diff --git a/src/runtime/sys_windows_386.s b/src/runtime/sys_windows_386.s
index 41a6ee69ca..cb854c52e0 100644
--- a/src/runtime/sys_windows_386.s
+++ b/src/runtime/sys_windows_386.s
@@ -251,8 +251,6 @@ TEXT runtime·switchtothread(SB),NOSPLIT,$0
RET
TEXT runtime·nanotime1(SB),NOSPLIT,$0-8
- CMPB runtime·useQPCTime(SB), $0
- JNE useQPC
loop:
MOVL (_INTERRUPT_TIME+time_hi1), AX
MOVL (_INTERRUPT_TIME+time_lo), CX
@@ -269,9 +267,6 @@ loop:
MOVL AX, ret_lo+0(FP)
MOVL DX, ret_hi+4(FP)
RET
-useQPC:
- JMP runtime·nanotimeQPC(SB)
- RET
// This is called from rt0_go, which runs on the system stack
// using the initial stack allocated by the OS.
diff --git a/src/runtime/sys_windows_amd64.s b/src/runtime/sys_windows_amd64.s
index e66f444ff5..6d26bd3447 100644
--- a/src/runtime/sys_windows_amd64.s
+++ b/src/runtime/sys_windows_amd64.s
@@ -265,16 +265,11 @@ TEXT runtime·switchtothread(SB),NOSPLIT,$0
RET
TEXT runtime·nanotime1(SB),NOSPLIT,$0-8
- CMPB runtime·useQPCTime(SB), $0
- JNE useQPC
MOVQ $_INTERRUPT_TIME, DI
MOVQ time_lo(DI), AX
IMULQ $100, AX
MOVQ AX, ret+0(FP)
RET
-useQPC:
- JMP runtime·nanotimeQPC(SB)
- RET
// func osSetupTLS(mp *m)
// Setup TLS. for use by needm on Windows.
diff --git a/src/runtime/sys_windows_arm.s b/src/runtime/sys_windows_arm.s
index 67009df723..c9fca19981 100644
--- a/src/runtime/sys_windows_arm.s
+++ b/src/runtime/sys_windows_arm.s
@@ -231,11 +231,6 @@ TEXT runtime·read_tls_fallback(SB),NOSPLIT,$0
RET
TEXT runtime·nanotime1(SB),NOSPLIT,$0-8
- MOVW $0, R0
- MOVB runtime·useQPCTime(SB), R0
- CMP $0, R0
- BNE useQPC
- MOVW $_INTERRUPT_TIME, R3
loop:
MOVW time_hi1(R3), R1
DMB MB_ISH
@@ -254,8 +249,6 @@ loop:
MOVW R3, ret_lo+0(FP)
MOVW R4, ret_hi+4(FP)
RET
-useQPC:
- RET runtime·nanotimeQPC(SB) // tail call
// save_g saves the g register (R10) into thread local memory
// so that we can call externally compiled
diff --git a/src/runtime/sys_windows_arm64.s b/src/runtime/sys_windows_arm64.s
index 22bf1dda70..2781c3c7d0 100644
--- a/src/runtime/sys_windows_arm64.s
+++ b/src/runtime/sys_windows_arm64.s
@@ -249,17 +249,12 @@ TEXT runtime·switchtothread(SB),NOSPLIT,$16-0
RET
TEXT runtime·nanotime1(SB),NOSPLIT,$0-8
- MOVB runtime·useQPCTime(SB), R0
- CMP $0, R0
- BNE useQPC
MOVD $_INTERRUPT_TIME, R3
MOVD time_lo(R3), R0
MOVD $100, R1
MUL R1, R0
MOVD R0, ret+0(FP)
RET
-useQPC:
- RET runtime·nanotimeQPC(SB) // tail call
// This is called from rt0_go, which runs on the system stack
// using the initial stack allocated by the OS.
diff --git a/src/runtime/time_windows_386.s b/src/runtime/time_windows_386.s
index b8b636ef30..77e5f76faa 100644
--- a/src/runtime/time_windows_386.s
+++ b/src/runtime/time_windows_386.s
@@ -9,8 +9,6 @@
#include "time_windows.h"
TEXT time·now(SB),NOSPLIT,$0-20
- CMPB runtime·useQPCTime(SB), $0
- JNE useQPC
loop:
MOVL (_INTERRUPT_TIME+time_hi1), AX
MOVL (_INTERRUPT_TIME+time_lo), CX
@@ -79,6 +77,3 @@ wall:
MOVL AX, sec+0(FP)
MOVL DX, sec+4(FP)
RET
-useQPC:
- JMP runtime·nowQPC(SB)
- RET
diff --git a/src/runtime/time_windows_amd64.s b/src/runtime/time_windows_amd64.s
index 226f2b5136..d3fcf2e11e 100644
--- a/src/runtime/time_windows_amd64.s
+++ b/src/runtime/time_windows_amd64.s
@@ -9,9 +9,6 @@
#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
@@ -37,6 +34,3 @@ TEXT time·now(SB),NOSPLIT,$0-24
SUBQ DX, CX
MOVL CX, nsec+8(FP)
RET
-useQPC:
- JMP runtime·nowQPC(SB)
- RET
diff --git a/src/runtime/time_windows_arm.s b/src/runtime/time_windows_arm.s
index 8d4469f993..ff5686d9c4 100644
--- a/src/runtime/time_windows_arm.s
+++ b/src/runtime/time_windows_arm.s
@@ -9,10 +9,6 @@
#include "time_windows.h"
TEXT time·now(SB),NOSPLIT,$0-20
- MOVW $0, R0
- MOVB runtime·useQPCTime(SB), R0
- CMP $0, R0
- BNE useQPC
MOVW $_INTERRUPT_TIME, R3
loop:
MOVW time_hi1(R3), R1
@@ -85,6 +81,4 @@ wall:
MOVW R7,sec_hi+4(FP)
MOVW R1,nsec+8(FP)
RET
-useQPC:
- RET runtime·nowQPC(SB) // tail call
diff --git a/src/runtime/time_windows_arm64.s b/src/runtime/time_windows_arm64.s
index 7943d6b46d..47e7656c88 100644
--- a/src/runtime/time_windows_arm64.s
+++ b/src/runtime/time_windows_arm64.s
@@ -9,10 +9,6 @@
#include "time_windows.h"
TEXT time·now(SB),NOSPLIT,$0-24
- MOVB runtime·useQPCTime(SB), R0
- CMP $0, R0
- BNE useQPC
-
MOVD $_INTERRUPT_TIME, R3
MOVD time_lo(R3), R0
MOVD $100, R1
@@ -42,6 +38,4 @@ TEXT time·now(SB),NOSPLIT,$0-24
MSUB R1, R0, R2, R0
MOVW R0, nsec+8(FP)
RET
-useQPC:
- RET runtime·nowQPC(SB) // tail call
generated by cgit v1.3-5-g45d5 (git 2.53.0) at 2026-04-17 17:40:57 +0000