[PATCH 69/77] target/microblaze: Convert dec_rts to decodetree

[Richard Henderson]

Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
 target/microblaze/insns.decode |  5 ++++
 target/microblaze/translate.c  | 54 +++++++++++++++-------------------
 2 files changed, 29 insertions(+), 30 deletions(-)

diff --git a/target/microblaze/insns.decode b/target/microblaze/insns.decode
index 21d08289f7..f12e85b492 100644
--- a/target/microblaze/insns.decode
+++ b/target/microblaze/insns.decode
@@ -199,6 +199,11 @@ rsubic          001011 ..... ..... ................     
@typeb
 rsubik          001101 ..... ..... ................     @typeb
 rsubikc         001111 ..... ..... ................     @typeb
 
+rtbd            101101 10010 ..... ................     @typeb_bc
+rtid            101101 10001 ..... ................     @typeb_bc
+rted            101101 10100 ..... ................     @typeb_bc
+rtsd            101101 10000 ..... ................     @typeb_bc
+
 sb              110100 ..... ..... ..... 0000 000 0000  @typea
 sbr             110100 ..... ..... ..... 0100 000 0000  @typea
 sbea            110100 ..... ..... ..... 0001 000 0000  @typea
diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index f79b02e987..22569693f7 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -1291,6 +1291,30 @@ static bool trans_mbar(DisasContext *dc, arg_mbar *arg)
     return true;
 }
 
+static bool do_rts(DisasContext *dc, arg_typeb_bc *arg, int to_set)
+{
+    if (trap_userspace(dc, to_set)) {
+        return true;
+    }
+    if (setup_dslot(dc)) {
+        return true;
+    }
+    dc->tb_flags_to_set |= to_set;
+
+    dc->jmp_cond = TCG_COND_ALWAYS;
+    dc->jmp_dest = -1;
+    tcg_gen_addi_i32(cpu_btarget, reg_for_read(dc, arg->ra), arg->imm);
+    return true;
+}
+
+#define DO_RTS(NAME, IFLAG) \
+    static bool trans_##NAME(DisasContext *dc, arg_typeb_bc *arg) \
+    { return do_rts(dc, arg, IFLAG); }
+
+DO_RTS(rtbd, DRTB_FLAG)
+DO_RTS(rtid, DRTI_FLAG)
+DO_RTS(rted, DRTE_FLAG)
+DO_RTS(rtsd, 0)
 
 static void msr_read(DisasContext *dc, TCGv_i32 d)
 {
@@ -1553,35 +1577,6 @@ static inline void do_rte(DisasContext *dc)
     dc->tb_flags &= ~DRTE_FLAG;
 }
 
-static void dec_rts(DisasContext *dc)
-{
-    unsigned int b_bit, i_bit, e_bit;
-
-    i_bit = dc->ir & (1 << 21);
-    b_bit = dc->ir & (1 << 22);
-    e_bit = dc->ir & (1 << 23);
-
-    if (trap_userspace(dc, i_bit || b_bit || e_bit)) {
-        return;
-    }
-
-    if (setup_dslot(dc)) {
-        return;
-    }
-
-    if (i_bit) {
-        dc->tb_flags |= DRTI_FLAG;
-    } else if (b_bit) {
-        dc->tb_flags |= DRTB_FLAG;
-    } else if (e_bit) {
-        dc->tb_flags |= DRTE_FLAG;
-    }
-
-    dc->jmp_cond = TCG_COND_ALWAYS;
-    dc->jmp_dest = -1;
-    tcg_gen_add_i32(cpu_btarget, cpu_R[dc->ra], *dec_alu_op_b(dc));
-}
-
 static void dec_null(DisasContext *dc)
 {
     if (trap_illegal(dc, true)) {
@@ -1629,7 +1624,6 @@ static struct decoder_info {
     };
     void (*dec)(DisasContext *dc);
 } decinfo[] = {
-    {DEC_RTS, dec_rts},
     {DEC_MSR, dec_msr},
     {DEC_STREAM, dec_stream},
     {{0, 0}, dec_null}
-- 
2.25.1