[src/trunk]: src/sys/arch/i386/i386 tsc_get_timecount(): fix 64-bit return

[ad <ad%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5ebc7b32298d
branches:  trunk
changeset: 972488:5ebc7b32298d
user:      ad <ad%NetBSD.org@localhost>
date:      Wed May 27 18:47:13 2020 +0000

description:
tsc_get_timecount(): fix 64-bit return

diffstat:

 sys/arch/i386/i386/cpufunc.S |  12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diffs (42 lines):

diff -r bf567b2ec236 -r 5ebc7b32298d sys/arch/i386/i386/cpufunc.S
--- a/sys/arch/i386/i386/cpufunc.S      Wed May 27 18:46:15 2020 +0000
+++ b/sys/arch/i386/i386/cpufunc.S      Wed May 27 18:47:13 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cpufunc.S,v 1.41 2020/05/19 21:40:55 ad Exp $  */
+/*     $NetBSD: cpufunc.S,v 1.42 2020/05/27 18:47:13 ad Exp $  */
 
 /*-
  * Copyright (c) 1998, 2007, 2020 The NetBSD Foundation, Inc.
@@ -38,7 +38,7 @@
 #include <sys/errno.h>
 
 #include <machine/asm.h>
-__KERNEL_RCSID(0, "$NetBSD: cpufunc.S,v 1.41 2020/05/19 21:40:55 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpufunc.S,v 1.42 2020/05/27 18:47:13 ad Exp $");
 
 #include "opt_xen.h"
 
@@ -164,19 +164,19 @@
 END(msr_onfault)
 
 ENTRY(tsc_get_timecount)
+       pushl   %ebx
        movl    CPUVAR(CURLWP), %ecx
 1:
-       pushl   L_NCSW(%ecx)
+       movl    L_NCSW(%ecx), %ebx
        rdtsc
        addl    CPUVAR(CC_SKEW), %eax
        adcl    CPUVAR(CC_SKEW+4), %edx
-       popl    %edx
-       cmpl    %edx, L_NCSW(%ecx)
+       cmpl    %ebx, L_NCSW(%ecx)
        jne     2f
+       popl    %ebx
        ret
 2:
        jmp     1b
-       ret
 END(tsc_get_timecount)
 
 STRONG_ALIAS(cpu_counter, tsc_get_timecount)