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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
/ ---------------------------------------------------------------------------
/ 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 the processor is not P5 or above else above 1.
/ ---------------------------------------------------------------------------
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
shrl $8,%eax
cmpl $5,%eax
jb no_cpuid
movl $1,%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
/ 2 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 exit2
movl $0x80000001,%eax
cpuid
xorl %eax,%eax
testl $0x80000000,%edx
jz exit2
/// eax=1 - K6 3DNow!
inc %eax
testl $0x40000000,%edx
jz exit2
/// eax=2 - K7 3DNowEx!
inc %eax
exit2:
popl %ecx
popl %edx
popl %ebx
ret
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