Fix incorrect read from rD.
Avoid adding 0 when rA == 0.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/ppc/translate.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index f74f3b8f0d..52b812a01f 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -5867,12 +5867,10 @@ static void gen_tlbsx_booke206(DisasContext *ctx)
     CHK_SV(ctx);
     if (rA(ctx->opcode)) {
         t0 = tcg_temp_new();
-        tcg_gen_mov_tl(t0, cpu_gpr[rD(ctx->opcode)]);
+        tcg_gen_add_tl(t0, cpu_gpr[rA(ctx->opcode)], cpu_gpr[rB(ctx->opcode)]);
     } else {
-        t0 = tcg_const_tl(0);
+        t0 = cpu_gpr[rB(ctx->opcode)];
     }
-
-    tcg_gen_add_tl(t0, t0, cpu_gpr[rB(ctx->opcode)]);
     gen_helper_booke206_tlbsx(cpu_env, t0);
 #endif /* defined(CONFIG_USER_ONLY) */
 }
-- 
2.34.1