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Make it clear that the CPUID instruction results are dependent on the type of core the instruction is ran on
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janekb04
janekb04
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The CPUID instruction gives information about the core, on which it is executed. It is different for P cores and E cores.

The CPUID on Alder Lake is family 6 model 0x9A for both cores when enabled. The CPUID is changed to family 6 model 0x97 when E cores are disabled and AVX512 is enabled.

CPUID leaf 7 EDX bit 15 indicates a hybrid design.

CPUID leaf 1A EAX bit 24-31 indicates the type of core, according to "Game Dev Guide for Alder Lake Performance Hybrid Architecture", https://www.intel.com/content/www/us/en/developer/articles/guide/alder-lake-developer-guide.html

See my discussion at https://www.agner.org/forum/viewtopic.php?f=1&t=79

The CPUID on Alder Lake is family 6 model 0x9A for both cores when enabled. The CPUID is changed to family 6 model 0x97 when E cores are disabled and AVX512 is enabled.

CPUID leaf 7 EDX bit 15 indicates a hybrid design.

CPUID leaf 1A EAX bit 24-31 indicates the type of core, according to "Game Dev Guide for Alder Lake Performance Hybrid Architecture", https://www.intel.com/content/www/us/en/developer/articles/guide/alder-lake-developer-guide.html

See my discussion at https://www.agner.org/forum/viewtopic.php?f=1&t=79

The CPUID instruction gives information about the core, on which it is executed. It is different for P cores and E cores.

The CPUID on Alder Lake is family 6 model 0x9A for both cores when enabled. The CPUID is changed to family 6 model 0x97 when E cores are disabled and AVX512 is enabled.

CPUID leaf 7 EDX bit 15 indicates a hybrid design.

CPUID leaf 1A EAX bit 24-31 indicates the type of core, according to "Game Dev Guide for Alder Lake Performance Hybrid Architecture", https://www.intel.com/content/www/us/en/developer/articles/guide/alder-lake-developer-guide.html

See my discussion at https://www.agner.org/forum/viewtopic.php?f=1&t=79

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A Fog
A Fog
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The CPUID on Alder Lake is family 6 model 0x9A for both cores when enabled. The CPUID is changed to family 6 model 0x97 when E cores are disabled and AVX512 is enabled.

CPUID leaf 7 EDX bit 15 indicates a hybrid design.

CPUID leaf 1A EAX bit 24-31 indicates the type of core, according to "Game Dev Guide for Alder Lake Performance Hybrid Architecture", https://www.intel.com/content/www/us/en/developer/articles/guide/alder-lake-developer-guide.html

See my discussion at https://www.agner.org/forum/viewtopic.php?f=1&t=79