kolibrios-fun/contrib/other/sdlquake-1.0.9/dosasm.S
CleverMouse 3cf7852e03 autobuild sdlquake
git-svn-id: svn://kolibrios.org@5131 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-09-18 11:46:53 +00:00

78 lines
1.2 KiB
ArmAsm

#include "asm_i386.h"
.data
fpenv: .long 0, 0, 0, 0, 0, 0, 0, 0
.text
.globl C(StartMSRInterval)
C(StartMSRInterval):
movl $0x11,%ecx // read the CESR
.byte 0x0F
.byte 0x32 // RDMSR
andl $0xFE3FFE3F,%eax // stop both counters
.byte 0x0F
.byte 0x30 // WRMSR
movl 4(%esp),%eax // point counter 0 to desired event, with counters
andl $0x3F,%eax // still stopped
movl $0x11,%ecx
.byte 0x0F
.byte 0x30 // WRMSR
movl $0x12,%ecx // set counter 0 to the value 0
subl %eax,%eax
subl %edx,%edx
.byte 0x0F
.byte 0x30 // WRMSR
movl 4(%esp),%eax // restart counter 0 with selected event
andl $0x3F,%eax
subl %edx,%edx
orl $0xC0,%eax
movl $0x11,%ecx // control and event select
.byte 0x0F
.byte 0x30 // WRMSR
ret
.globl C(EndMSRInterval)
C(EndMSRInterval):
movl $0x12,%ecx // counter 0
.byte 0x0F
.byte 0x32 // RDMSR
ret // lower 32 bits of count in %eax
#if 0
.data
Lxxx: .long 0
.text
.globl C(setstackcheck)
C(setstackcheck):
movl %esp,%eax
subl $0x38000,%eax
movl $0x5A5A5A5A,(%eax)
movl %eax,Lxxx
ret
.globl C(dostackcheck)
C(dostackcheck):
movl Lxxx,%edx
movl $0,%eax
cmpl $0x5A5A5A5A,(%edx)
jz qqq
incl %eax
qqq:
ret
#endif