Host riscv disas is broken

[Richard Henderson]

2595:            if (dec->cfg->ext_zcmop) {
2690:                if (dec->cfg->ext_zcmp && ((inst >> 12) & 0b01)) {
2716:                        if (!dec->cfg->ext_zcmt) {
2726:                        if (!dec->cfg->ext_zcmp) {
4028:                if (dec->cfg->ext_zimop) {
5044:            if (dec->cfg->ext_zfinx) {
5051:            if (dec->cfg->ext_zfinx) {
5058:            if (dec->cfg->ext_zfinx) {
5065:            if (dec->cfg->ext_zfinx) {
5371:        if (guard_func(cfg)) {
This structure comes from RISCVCPU, a target structure.
There is no such structure for the host, causing null pointer dereferences.

The zfinx references can be changed to

    dec->cfg && dec->cfg->ext_zfinx

but some of them can simply be removed, e.g. zcmop and zimop, which are otherwise reserved 
encodings.


r~