__attribute__ ((always_inline)) __attribute__ ((pure))
int cpu_has(unsigned short bit)
{
	asm goto ("1: jmp %l[t_no]\n" "2:\n" ".section .altinstructions,\"a\"\n"
		  ".balign 4\n" ".long 1b\n" ".long 0\n" ".word %P0\n" ".byte 2b - 1b\n" ".byte 0\n"
		  ".previous\n"::"i" (bit)::t_no);
	return 1;
      t_no:return 0;
}

union thread_xstate {
	int swd;
	int xstate_bv;
};

void aes_decrypt(union thread_xstate *state)
{
	if (fpu_usable()) {
		decrypt();
		return;
	}

	if (__builtin_constant_p(cpu_has(154)) ? cpu_has(154) : cpu_has(154)) {
		if (state->xstate_bv)
			return;
	} else if (cpu_has(24)) {}

	if (state->swd)
		asm volatile ("fnclex");
}

void (*funcptr)(void) = aes_decrypt;