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-rw-r--r--target-m68k/translate.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 10b733fa0a..52f38e4c0c 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -2440,8 +2440,12 @@ register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
int to;
/* Sanity check. All set bits must be included in the mask. */
- if (opcode & ~mask)
+ if (opcode & ~mask) {
+ fprintf(stderr,
+ "qemu internal error: bogus opcode definition %04x/%04x\n",
+ opcode, mask);
abort();
+ }
/* This could probably be cleverer. For now just optimize the case where
the top bits are known. */
/* Find the first zero bit in the mask. */