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authorWunkolo <[email protected]>2023-03-22 12:54:30 -0700
committerWunkolo <[email protected]>2023-03-22 17:40:34 -0700
commitd700f6c3573e0a2fda1511c36b60e86245278735 (patch)
tree5b20886455e0529ca322697d54018d419545bc19 /doc
parent740dff2e866f3ae1a70dd42d6e8836847ed95cc2 (diff)
downloadxbyak-d700f6c3573e0a2fda1511c36b60e86245278735.tar.gz
xbyak-d700f6c3573e0a2fda1511c36b60e86245278735.zip
add detection of xsave
The XSAVE cpuid flag determines if the processor supports the XSAVE instructions(`xsave`, `xrestor`, `xsetbv`, `xgetbv`). The OSXSAVE cpuid flag determines if the _operating system_ has XSAVE **enabled**. Userland code has to use OSXSAVE for features such as AVX and AVX512 but it still matters to know if the processor itself supports it but not the operating system such as some virtual-machine contexts.
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