target/xtensa: extract test for an illegal instruction

- TB flags: add XTENSA_TBFLAG_CWOE that corresponds to the architectural
  CWOE state;
- entry: move CWOE check from the helper to the test_ill_entry;
- retw: move CWOE check from the helper to the test_ill_retw;
- separate instruction disassembly loop and translation loop; save
  disassembly results in local array;

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/target/xtensa/helper.c b/target/xtensa/helper.c
index 4fceb4424a..501082f55b 100644
--- a/target/xtensa/helper.c
+++ b/target/xtensa/helper.c
@@ -57,12 +57,18 @@ static void init_libisa(XtensaConfig *config)
 {
     unsigned i, j;
     unsigned opcodes;
+    unsigned formats;
 
     config->isa = xtensa_isa_init(config->isa_internal, NULL, NULL);
     assert(xtensa_isa_maxlength(config->isa) <= MAX_INSN_LENGTH);
     opcodes = xtensa_isa_num_opcodes(config->isa);
+    formats = xtensa_isa_num_formats(config->isa);
     config->opcode_ops = g_new(XtensaOpcodeOps *, opcodes);
 
+    for (i = 0; i < formats; ++i) {
+        assert(xtensa_format_num_slots(config->isa, i) <= MAX_INSN_SLOTS);
+    }
+
     for (i = 0; i < opcodes; ++i) {
         const char *opc_name = xtensa_opcode_name(config->isa, i);
         XtensaOpcodeOps *ops = NULL;