CRIS: Convert divide step to TCG.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4313 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/target-cris/translate.c b/target-cris/translate.c
index 04632f57ec751ebbcf443331ffd36179e8d7de8b..76996b5ea4c2ce5907eb5a709beecbf8bcc40023 100644 (file)
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -375,6 +375,23 @@ static void t_gen_lz_i32(TCGv d, TCGv x)
        tcg_gen_discard_i32(n);
 }
 
+static void t_gen_cris_dstep(TCGv d, TCGv s)
+{
+       int l1;
+
+       l1 = gen_new_label();
+
+       /* 
+        * d <<= 1
+        * if (d >= s)
+        *    d -= s;
+        */
+       tcg_gen_shli_tl(d, d, 1);
+       tcg_gen_brcond_tl(TCG_COND_LTU, d, s, l1);
+       tcg_gen_sub_tl(d, d, s);
+       gen_set_label(l1);
+}
+
 /* Extended arithmetics on CRIS.  */
 static inline void t_gen_add_flag(TCGv d, int flag)
 {
@@ -725,7 +742,7 @@ static void crisv32_alu_op(DisasContext *dc, int op, int rd, int size)
                }
                break;
                case CC_OP_DSTEP:
-                       gen_op_dstep_T0_T1();
+                       t_gen_cris_dstep(cpu_T[0], cpu_T[1]);
                        break;
                case CC_OP_BOUND:
                {