target/xtensa: use libisa for instruction decoding

Replace manual opcode analysis with libisa-based code. This makes it
possible to support variable-encoding instructions of the core ISA, like
const16, and will allow to support advanced Xtensa features, like FLIX
and TIE.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/target/xtensa/cpu.h b/target/xtensa/cpu.h
index 9a34cc825e..e93bbb3c6d 100644
--- a/target/xtensa/cpu.h
+++ b/target/xtensa/cpu.h
@@ -392,6 +392,9 @@ struct XtensaConfig {
     uint32_t configid[2];
 
     void *isa_internal;
+    xtensa_isa isa;
+    XtensaOpcodeOps **opcode_ops;
+    const XtensaOpcodeTranslators **opcode_translators;
 
     uint32_t clock_freq_khz;