mirror of https://github.com/mpv-player/mpv
116 lines
2.7 KiB
ArmAsm
116 lines
2.7 KiB
ArmAsm
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/ ---------------------------------------------------------------------------
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/ Cpu function detect by Pontscho/fresh!mindworkz (c) 2000 - 2000
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/ 3dnow-dsp detection by Nick Kurshev (C) 2001
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/ ---------------------------------------------------------------------------
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.text
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.globl CpuDetect
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.globl ipentium
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.globl a3dnow
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/ ---------------------------------------------------------------------------
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/ in C: unsigned long CpuDetect( void );
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/ return: cpu ident number.
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/ ---------------------------------------------------------------------------
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CpuDetect:
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pushl %ebx
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pushl %ecx
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pushl %edx
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pushfl
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popl %eax
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movl %eax,%ebx
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xorl $0x00200000,%eax
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pushl %eax
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popfl
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pushfl
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popl %eax
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cmpl %eax,%ebx
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jz no_cpuid_cpudetect
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movl $1,%eax
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cpuid
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jmp exit_cpudetect
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no_cpuid_cpudetect:
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xorl %eax,%eax
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exit_cpudetect:
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popl %edx
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popl %ecx
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popl %ebx
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ret
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/ ---------------------------------------------------------------------------
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/ in C: unsigled long ipentium( void );
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/ return: 0 if the processor is not P5 or above else above 1.
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/ ---------------------------------------------------------------------------
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ipentium:
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pushl %ebx
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pushl %ecx
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pushl %edx
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pushfl
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popl %eax
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movl %eax,%ebx
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xorl $0x00200000,%eax
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pushl %eax
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popfl
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pushfl
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popl %eax
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cmpl %eax,%ebx
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jz no_cpuid
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movl $1,%eax
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cpuid
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shrl $8,%eax
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cmpl $5,%eax
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jb no_cpuid
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movl $1,%eax
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jmp exit
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no_cpuid:
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xorl %eax,%eax
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exit:
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popl %edx
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popl %ecx
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popl %ebx
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ret
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/ ---------------------------------------------------------------------------
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/ in C: unsigned long a3dnow( void );
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/ return: 0 if this processor does not support 3dnow!
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/ 1 otherwise
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/ 2 if this cpu supports 3dnow-dsp extension
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/ ---------------------------------------------------------------------------
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a3dnow:
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pushl %ebx
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pushl %edx
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pushl %ecx
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call ipentium
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testl %eax,%eax
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jz exit2
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movl $0x80000000,%eax
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cpuid
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cmpl $0x80000000,%eax
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jbe exit2
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movl $0x80000001,%eax
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cpuid
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xorl %eax,%eax
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testl $0x80000000,%edx
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jz exit2
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/// eax=1 - K6 3DNow!
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inc %eax
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testl $0x40000000,%edx
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jz exit2
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/// eax=2 - K7 3DNowEx!
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inc %eax
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exit2:
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popl %ecx
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popl %edx
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popl %ebx
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ret
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