kernel_insn_err
return kernel_insn_err(fxrstor %[fx], "=m" (*fx), [fx] "m" (*fx));
return kernel_insn_err(fxrstorq %[fx], "=m" (*fx), [fx] "m" (*fx));
return kernel_insn_err(frstor %[fx], "=m" (*fx), [fx] "m" (*fx));