runtime: fix usleep on windows/arm

Changed calling convention to pre-multiply the argument by -100,
and then deleted the * 100 but not the negation in the windows/arm assembly.
Delete the negation.

Fixes the current all.bash breakage on windows/arm builder.
(Maybe that will uncover more.)

Change-Id: I13006a44866ecc007586deb180a49c038d70aa99
Reviewed-on: https://go-review.googlesource.com/c/go/+/295529
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

diff --git a/src/runtime/sys_windows_arm.s b/src/runtime/sys_windows_arm.s
index 4be5ce7da0c925d22b0e196a9620b6bee50128db..9a5d9b1dd40b4d9c588bc4a6bdc2105f62795b57 100644 (file)
--- a/src/runtime/sys_windows_arm.s
+++ b/src/runtime/sys_windows_arm.s
@@ -375,12 +375,11 @@ TEXT runtime·tstart_stdcall(SB),NOSPLIT|NOFRAME,$0
 // duration (in -100ns units) is in dt+0(FP).
 // g may be nil.
 TEXT runtime·usleep2(SB),NOSPLIT|NOFRAME,$0-4
-       MOVW    dt+0(FP), R0
+       MOVW    dt+0(FP), R3
        MOVM.DB.W [R4, R14], (R13)      // push {r4, lr}
        MOVW    R13, R4                 // Save SP
        SUB     $8, R13                 // R13 = R13 - 8
        BIC     $0x7, R13               // Align SP for ABI
-       RSB     $0, R0, R3              // R3 = -R0
        MOVW    $0, R1                  // R1 = FALSE (alertable)
        MOVW    $-1, R0                 // R0 = handle
        MOVW    R13, R2                 // R2 = pTime