#if 0
	reg      name    usage
	---+-----------+-------------
	0        zero   always zero
	1         ra    return address
	2         tp	TLS
	3		  sp	stack pointer
	4-11	  a0-a7 argument
	4-5		  v0-v1 return value
	12-20	  t0-t8 temp
	21		  x		reserved
	22		  fp	frame point
	23-31	  s0-s8 subroutine registe variables
#endif

	return strdup (
	"=PC	pc\n"
	"=SP	sp\n"
	"=BP	fp\n"
	"=A0	a0\n"
	"=A1	a1\n"
	"=A2	a2\n"
	"=A3	a3\n"
	"=A4	a0\n"
	"=A5	a1\n"
	"=A6	a2\n"
	"=A7	a3\n"
	"gpr	zero	.64	0	0\n"
	"gpr	ra	.64	8	0\n"
	"gpr	tp	.64	16	0\n"
	"gpr	sp	.64	24	0\n"
	/* args */
	"gpr	a0	.64	32	0\n"
	"gpr	a1	.64	40	0\n"
	/*FIXME v0 v1 and a0 a1 are overlapping*/
	"gpr	a2	.64	48	0\n"
	"gpr	a3	.64	56	0\n"
	"gpr	a4	.64	64	0\n"
	"gpr	a5	.64	72	0\n"
	"gpr	a6	.64	80	0\n"
	"gpr	a7	.64	88	0\n"
	/* tmp */
	"gpr	t0	.64	96	0\n"
	"gpr	t1	.64	104	0\n"
	"gpr	t2	.64	112	0\n"
	"gpr	t3	.64	120	0\n"
	"gpr	t4	.64	128	0\n"
	"gpr	t5	.64	136	0\n"
	"gpr	t6	.64	144	0\n"
	"gpr	t7	.64	152	0\n"
	"gpr	t8	.64	160	0\n"
	"gpr	x	.64	168	0\n"
	"gpr	fp	.64	176	0\n"
	/* saved */
	"gpr	s0	.64	184	0\n"
	"gpr	s1	.64	192	0\n"
	"gpr	s2	.64	200	0\n"
	"gpr	s3	.64	208	0\n"
	"gpr	s4	.64	216	0\n"
	"gpr	s5	.64	224	0\n"
	"gpr	s6	.64	232	0\n"
	"gpr	s7	.64	240	0\n"
	"gpr	s8	.64	248	0\n"
	/* extra */
	"gpr	pc	.64	272	0\n"
	);