[Qemu-devel] [PATCH for-2.5 20/30] m68k: add exg

[Laurent Vivier]

Signed-off-by: Laurent Vivier <address@hidden>
---
 target-m68k/translate.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index adf4521..b7d15e9 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -2035,10 +2035,42 @@ DISAS_INSN(and)
     TCGv dest;
     TCGv addr;
     int opsize;
+    int exg_mode;
 
+    dest = tcg_temp_new();
+
+    /* exg */
+
+    exg_mode = insn & 0x1f8;
+    if (exg_mode == 0x140) {
+        /* exchange Dx and Dy */
+        src = DREG(insn, 9);
+        reg = DREG(insn, 0);
+        tcg_gen_mov_i32(dest, src);
+        tcg_gen_mov_i32(src, reg);
+        tcg_gen_mov_i32(reg, dest);
+        return;
+    } else if (exg_mode == 0x148) {
+        /* exchange Ax and Ay */
+        src = AREG(insn, 9);
+        reg = AREG(insn, 0);
+        tcg_gen_mov_i32(dest, src);
+        tcg_gen_mov_i32(src, reg);
+        tcg_gen_mov_i32(reg, dest);
+        return;
+    } else if (exg_mode == 0x188) {
+        /* exchange Dx and Ay */
+        src = DREG(insn, 9);
+        reg = AREG(insn, 0);
+        tcg_gen_mov_i32(dest, src);
+        tcg_gen_mov_i32(src, reg);
+        tcg_gen_mov_i32(reg, dest);
+        return;
+    }
+    /* and */
     opsize = insn_opsize(insn, 6);
     reg = DREG(insn, 9);
-    dest = tcg_temp_new();
+
     if (insn & 0x100) {
         SRC_EA(env, src, opsize, -1, &addr);
         tcg_gen_and_i32(dest, src, reg);
-- 
2.4.3