target-m68k: cmp manages word and bytes operands

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>

diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 0448569..57ac2e5 100644 (file)
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -582,6 +582,13 @@ static void gen_logic_cc(DisasContext *s, TCGv val, int opsize)
     set_cc_op(s, CC_OP_LOGIC);
 }
 
+static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize)
+{
+    tcg_gen_mov_i32(QREG_CC_N, dest);
+    tcg_gen_mov_i32(QREG_CC_V, src);
+    set_cc_op(s, CC_OP_CMPB + opsize);
+}
+
 static void gen_update_cc_add(TCGv dest, TCGv src, int opsize)
 {
     gen_ext(QREG_CC_N, dest, opsize, 1);
@@ -2132,10 +2139,9 @@ DISAS_INSN(cmp)
     int opsize;
 
     opsize = insn_opsize(insn);
-    SRC_EA(env, src, opsize, -1, NULL);
-    reg = DREG(insn, 9);
-    gen_update_cc_add(reg, src, OS_LONG);
-    set_cc_op(s, CC_OP_CMPL);
+    SRC_EA(env, src, opsize, 1, NULL);
+    reg = gen_extend(DREG(insn, 9), opsize, 1);
+    gen_update_cc_cmp(s, reg, src, opsize);
 }
 
 DISAS_INSN(cmpa)
@@ -2151,8 +2157,7 @@ DISAS_INSN(cmpa)
     }
     SRC_EA(env, src, opsize, 1, NULL);
     reg = AREG(insn, 9);
-    gen_update_cc_add(reg, src, OS_LONG);
-    set_cc_op(s, CC_OP_CMPL);
+    gen_update_cc_cmp(s, reg, src, opsize);
 }
 
 DISAS_INSN(eor)