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/ ---------------------------------------------------------------------------
/ Cpu function detect by Pontscho/fresh!mindworkz (c) 2000 - 2000
/ 3dnow-dsp detection by Nick Kurshev (C) 2001
/ ---------------------------------------------------------------------------
.text
.globl CpuDetect
.globl ipentium
.globl a3dnow
.globl isse
/ ---------------------------------------------------------------------------
/ in C: unsigned long CpuDetect( void );
/ return: cpu ident number.
/ ---------------------------------------------------------------------------
CpuDetect:
pushl %ebx
pushl %ecx
pushl %edx
pushfl
popl %eax
movl %eax,%ebx
xorl $0x00200000,%eax
pushl %eax
popfl
pushfl
popl %eax
cmpl %eax,%ebx
jz no_cpuid_cpudetect
movl $1,%eax
cpuid
jmp exit_cpudetect
no_cpuid_cpudetect:
xorl %eax,%eax
exit_cpudetect:
popl %edx
popl %ecx
popl %ebx
ret
/ ---------------------------------------------------------------------------
/ in C: unsigled long ipentium( void );
/ return: 0 if this processor i386 or i486
/ 1 otherwise
/ 3 if this cpu supports mmx
/ ---------------------------------------------------------------------------
ipentium:
pushl %ebx
pushl %ecx
pushl %edx
pushfl
popl %eax
movl %eax,%ebx
xorl $0x00200000,%eax
pushl %eax
popfl
pushfl
popl %eax
cmpl %eax,%ebx
jz no_cpuid
movl $1,%eax
cpuid
movl %eax, %ecx
xorl %eax, %eax
shrl $8,%ecx
cmpl $5,%ecx
jb exit
incl %eax
test $0x00800000, %edx
jz exit
orl $2, %eax
jmp exit
no_cpuid:
xorl %eax,%eax
exit:
popl %edx
popl %ecx
popl %ebx
ret
/ ---------------------------------------------------------------------------
/ in C: unsigned long a3dnow( void );
/ return: 0 if this processor does not support 3dnow!
/ 1 otherwise
/ 3 if this cpu supports 3dnow-dsp extension
/ ---------------------------------------------------------------------------
a3dnow:
pushl %ebx
pushl %edx
pushl %ecx
call ipentium
testl %eax,%eax
jz exit2
movl $0x80000000,%eax
cpuid
cmpl $0x80000000,%eax
jbe no3dnow
movl $0x80000001,%eax
cpuid
xorl %eax,%eax
testl $0x80000000,%edx
jz no3dnow
/// eax=1 - K6 3DNow!
inc %eax
testl $0x40000000,%edx
jz exit2
/// eax=2 - K7 3DNowEx!
orl $2, %eax
jmp exit2
no3dnow:
xorl %eax,%eax
exit2:
popl %ecx
popl %edx
popl %ebx
ret
/ ---------------------------------------------------------------------------
/ in C: unsigned long isse( void );
/ return: 0 if this processor does not support sse
/ 1 otherwise
/ 3 if this cpu supports sse2 extension
/ ---------------------------------------------------------------------------
isse:
pushl %ebx
pushl %edx
pushl %ecx
call ipentium
testl %eax,%eax
jz exit3
movl $1,%eax
cpuid
xorl %eax, %eax
testl $0x02000000,%edx
jz exit3
incl %eax
testl $0x04000000,%edx
jz exit3
orl $2, %eax
exit3:
popl %ecx
popl %edx
popl %ebx
ret
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