diff mbox

[v2,03/17] target-m68k: add exg ops

Message ID 1477528950-8115-4-git-send-email-laurent@vivier.eu (mailing list archive)
State New, archived
Headers show

Commit Message

Laurent Vivier Oct. 27, 2016, 12:42 a.m. UTC 
Suggested-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 target-m68k/translate.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

Comments

Richard Henderson Oct. 27, 2016, 1:36 a.m. UTC | #1 
On 10/26/2016 05:42 PM, Laurent Vivier wrote:
> Suggested-by: Richard Henderson <rth@twiddle.net>
> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
> ---
>  target-m68k/translate.c | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)

Reviewed-by: Richard Henderson <rth@twiddle.net>


r~
diff mbox

Patch

diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 0d3111d..b407623 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -2021,6 +2021,33 @@  DISAS_INSN(eor)
     DEST_EA(env, insn, OS_LONG, dest, &addr);
 }
 
+static void do_exg(TCGv reg1, TCGv reg2)
+{
+    TCGv temp = tcg_temp_new();
+    tcg_gen_mov_i32(temp, reg1);
+    tcg_gen_mov_i32(reg1, reg2);
+    tcg_gen_mov_i32(reg2, temp);
+    tcg_temp_free(temp);
+}
+
+DISAS_INSN(exg_aa)
+{
+    /* exchange Dx and Dy */
+    do_exg(DREG(insn, 9), DREG(insn, 0));
+}
+
+DISAS_INSN(exg_dd)
+{
+    /* exchange Ax and Ay */
+    do_exg(AREG(insn, 9), AREG(insn, 0));
+}
+
+DISAS_INSN(exg_da)
+{
+    /* exchange Dx and Ay */
+    do_exg(DREG(insn, 9), AREG(insn, 0));
+}
+
 DISAS_INSN(and)
 {
     TCGv src;
@@ -3154,6 +3181,9 @@  void register_m68k_insns (CPUM68KState *env)
     INSN(cmpa,      b0c0, f0c0, M68000);
     INSN(eor,       b180, f1c0, CF_ISA_A);
     BASE(and,       c000, f000);
+    INSN(exg_dd,    c140, f1f8, M68000);
+    INSN(exg_aa,    c148, f1f8, M68000);
+    INSN(exg_da,    c188, f1f8, M68000);
     BASE(mulw,      c0c0, f0c0);
     BASE(addsub,    d000, f000);
     INSN(addx,      d180, f1f8, CF_ISA_A);