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Merge from sys/i386/i386/microtime.s revision 1.36.

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This commit is contained in:
KATO Takenori 1997-12-28 08:16:28 +00:00
parent fb05cb0121
commit 19bb9bcc82
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=32049
1 changed files with 11 additions and 14 deletions
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25
sys/pc98/i386/microtime.s
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@ -32,7 +32,7 @@
* SUCH DAMAGE.
*
* from: Steve McCanne's microtime code
* $Id: microtime.s,v 1.19 1997/12/15 08:37:13 kato Exp $
* $Id: microtime.s,v 1.20 1997/12/26 20:42:33 phk Exp $
*/
#include <machine/asmacros.h>
@ -54,11 +54,20 @@ ENTRY(microtime)
#if (defined(I586_CPU) || defined(I686_CPU)) && !defined(SMP)
movl _tsc_freq, %ecx
testl %ecx, %ecx
jne pentium_microtime
je i8254_microtime
pushfl
cli
.byte 0x0f, 0x31 /* RDTSC */
subl _tsc_bias, %eax
mull _tsc_multiplier
movl %edx, %eax
jmp common_microtime
#else
xorl %ecx, %ecx /* clear ecx */
#endif
ALIGN_TEXT
i8254_microtime:
movb $TIMER_SEL0|TIMER_LATCH, %al /* prepare to latch */
pushfl
@ -286,15 +295,3 @@ common_microtime:
movl %eax, 4(%ecx) /* tvp->tv_usec = usec */
ret
#if (defined(I586_CPU) || defined(I686_CPU)) && !defined(SMP)
ALIGN_TEXT
pentium_microtime:
pushfl
cli
.byte 0x0f, 0x31 /* RDTSC */
subl _tsc_bias, %eax
mull _tsc_multiplier
movl %edx, %eax
jmp common_microtime
#endif