Mercurial > sdl-ios-xcode
diff src/cpuinfo/SDL_cpuinfo.c @ 787:07760c8854d1
Date: Sat, 24 Jan 2004 14:49:58 +0100
From: Stephane Marchesin
Subject: Re: [SDL] 3DNow! detection on a P4 system
Well... I found another bug : 3dnow was detected on P2/P3 cpus. So I
took one more look at the code and found a mistake in
CPU_getCPUIDFeaturesExt :
The condition for having extended cpuinfo is that when we query extended
cpuinfo we get a result >= 0x80000001. So we must exit if eax < 0x80000001.
The attached patch does that.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 24 Jan 2004 15:55:00 +0000 |
| parents | e1e0a0a94570 |
| children | c20f08c4f437 |
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--- a/src/cpuinfo/SDL_cpuinfo.c Sat Jan 24 05:57:56 2004 +0000 +++ b/src/cpuinfo/SDL_cpuinfo.c Sat Jan 24 15:55:00 2004 +0000 @@ -128,7 +128,7 @@ " movl $0x80000000,%%eax # Query for extended functions \n" " cpuid # Get extended function limit \n" " cmpl $0x80000001,%%eax \n" -" jbe 1f # Nope, we dont have function 800000001h\n" +" jl 1f # Nope, we dont have function 800000001h\n" " movl $0x80000001,%%eax # Setup extended function 800000001h\n" " cpuid # and get the information \n" " movl %%edx,%0 \n" @@ -143,7 +143,7 @@ mov eax,80000000h ; Query for extended functions cpuid ; Get extended function limit cmp eax,80000001h - jbe done ; Nope, we dont have function 800000001h + jl done ; Nope, we dont have function 800000001h mov eax,80000001h ; Setup extended function 800000001h cpuid ; and get the information mov features,edx