This is a new instruction, present on the SandyBridge architecture and
later. Some older assemblers do not support it and produce:
{standard input}:225:no such instruction: `xgetbv'
The use of this instruction is protected by a CPUID check (function 1,
ECX bit 27), so we only run it in processors that do support it.
Change-Id: Ife7500c0deaab9539074835a4511e8c19602608e
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
eax = result;
edx = result >> 32;
#elif defined(Q_CC_GNU)
- asm ("xgetbv"
+ asm (".byte 0x0F, 0x01, 0xD0" // xgetbv instruction
: "=a" (eax), "=d" (edx)
: "c" (in));
#endif