FEATURE_D_1_EAX
cpu->arch.feature[FEATURE_D_1_EAX] = 0;
cpu->arch.feature[FEATURE_D_1_EAX] = cpuid.regs.eax;
FEATURE_D_1_EAX);
if (cpu->arch.feature[FEATURE_D_1_EAX] & IA32_FEATURE_XSAVEOPT)
if (cpu->arch.feature[FEATURE_D_1_EAX] & IA32_FEATURE_XSAVEC)
if (cpu->arch.feature[FEATURE_D_1_EAX] & IA32_FEATURE_XGETBV1)
if (cpu->arch.feature[FEATURE_D_1_EAX] & IA32_FEATURE_XSAVES)