[Qemu-devel] [PATCH v3 3/5] target-m68k: manage pre-dec et post-inc in CAS

[Laurent Vivier <laurent@vivier.eu>]

In these cases we must update the address register after
the operation.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
---
 target/m68k/translate.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/target/m68k/translate.c b/target/m68k/translate.c
index 0e97900..23e2b06 100644
--- a/target/m68k/translate.c
+++ b/target/m68k/translate.c
@@ -1963,6 +1963,15 @@ DISAS_INSN(cas)
     gen_partset_reg(opsize, DREG(ext, 0), load);
 
     tcg_temp_free(load);
+
+    switch (extract32(insn, 3, 3)) {
+    case 3: /* Indirect postincrement.  */
+        tcg_gen_addi_i32(AREG(insn, 0), addr, opsize_bytes(opsize));
+        break;
+    case 4: /* Indirect predecrememnt.  */
+        tcg_gen_mov_i32(AREG(insn, 0), addr);
+        break;
+    }
 }
 
 DISAS_INSN(cas2w)
-- 
2.7.4