target-ppc: mffs. Should Set CR1 from FPSCR Bits

Update the Move From FPSCR (mffs.) instruction to correctly
set CR[1] from FPSCR[FX,FEX,VX,OX].

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

target-ppc/translate.c

diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 35c3a16..32c9f49 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -2504,7 +2504,9 @@
     }
     gen_reset_fpstatus();
     tcg_gen_extu_tl_i64(cpu_fpr[rD(ctx->opcode)], cpu_fpscr);
-    gen_compute_fprf(cpu_fpr[rD(ctx->opcode)], 0, Rc(ctx->opcode) != 0);
+    if (unlikely(Rc(ctx->opcode))) {
+        gen_set_cr1_from_fpscr(ctx);
+    }
 }
 
 /* mtfsb0 */