CPU_Basic_Features_Ext2

Check which features are supported and return them as in a formatted string as a list seperated by space, tab, comma, line-feed, carriage return & line feed or null. The formatted string is terminated by a double null.

CPU_Basic_Features_Ext2 PROTO lpqwFeaturesString:QWORD, lpqwFeaturesStringSize:QWORD, qwStringType:QWORD, qwStringStyle:QWORD, qwMaskEDX:QWORD

Parameters

• lpqwFeaturesString - Pointer to a QWORD variable used to store the pointer to the formatted features string.

• lpqwFeaturesStringSize - Pointer to a QWORD variable used to store the size of the formatted features string.

• qwStringType - The type of feature string to include, can be one of the following value:

  • CFST_MNEMONIC - Short form of the feature: “AVX”

  • CFST_FEATURE - Long form describing the feature: “Advanced Vector Exte..”

  • CFST_BOTH - “AVX: Advanced Vector Extensions (AVX) Instruction Extensions”

• qwStringStyle - the style of formatting for the feature string, can be one of the following values:

  • CFSS_NULL - null separated.

  • CFSS_SPACE - space separated.

  • CFSS_COMMA - comma and space separated.

  • CFSS_TAB - tab separated.

  • CFSS_LF - line feed (LF) separated.

  • CFSS_CRLF - carriage return (CR) and line feed (LF) separated.

  • CFSS_LIST - dash ‘- ‘ precedes text and CRLF separates.

• qwMaskEDX - a QWORD value to mask the features returned in the EDX register so that only the features you are interested in are collected. A mask value -1 means to include all features that are found. A mask value of 0 means to exclude all features found for EDX feature flags.

Returns

TRUE if successful, or FALSE otherwise

Notes

The variables pointed to by the lpqwFeaturesString parameter and the lpqwFeaturesStringSize parameter will be set to 0 if the function returns FALSE. The string returned and stoed in the variable pointed to by the lpqwFeaturesString parameter should be freed with a call to GlobalFree when you no longer require it.

CPUID EAX=7,ECX=2: Extended feature bits in EDX