target/ppc: Make divw[u] handler method decodetree compatible.

The handler methods for divw[u] instructions internally use Rc(ctx->opcode),
for extraction of Rc field of instructions, which poses a problem if we move
the above said instructions to decodetree, as the ctx->opcode field is not
popluated in decodetree. Hence, making it decodetree compatible, so that the
mentioned insns can be safely move to decodetree specs.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index cb10e33cebdaf436dfc37ef82c90d4733775f078..277d96aa949a975891e91f34fe00a078a0d19259 100644 (file)
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -1737,8 +1737,9 @@ static inline void gen_op_arith_add(DisasContext *ctx, TCGv ret, TCGv arg1,
     }
 }
 
-static inline void gen_op_arith_divw(DisasContext *ctx, TCGv ret, TCGv arg1,
-                                     TCGv arg2, int sign, int compute_ov)
+static inline void gen_op_arith_divw(DisasContext *ctx, TCGv ret,
+                                     TCGv arg1, TCGv arg2, bool sign,
+                                     bool compute_ov, bool compute_rc0)
 {
     TCGv_i32 t0 = tcg_temp_new_i32();
     TCGv_i32 t1 = tcg_temp_new_i32();
@@ -1772,7 +1773,7 @@ static inline void gen_op_arith_divw(DisasContext *ctx, TCGv ret, TCGv arg1,
         tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov);
     }
 
-    if (unlikely(Rc(ctx->opcode) != 0)) {
+    if (unlikely(compute_rc0)) {
         gen_set_Rc0(ctx, ret);
     }
 }
@@ -1782,7 +1783,7 @@ static void glue(gen_, name)(DisasContext *ctx)                               \
 {                                                                             \
     gen_op_arith_divw(ctx, cpu_gpr[rD(ctx->opcode)],                          \
                      cpu_gpr[rA(ctx->opcode)], cpu_gpr[rB(ctx->opcode)],      \
-                     sign, compute_ov);                                       \
+                     sign, compute_ov, Rc(ctx->opcode));                      \
 }
 /* divwu  divwu.  divwuo  divwuo.   */
 GEN_INT_ARITH_DIVW(divwu, 0x0E, 0, 0);