From: Richard Henderson <richard.henderson@linaro.org>

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/ppc/insn64.decode                   |  5 +++++
 target/ppc/translate/fixedpoint-impl.c.inc | 12 ++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/target/ppc/insn64.decode b/target/ppc/insn64.decode
index 68ed2cbff8..9bef32a845 100644
--- a/target/ppc/insn64.decode
+++ b/target/ppc/insn64.decode
@@ -30,3 +30,8 @@
 
 PADDI           000001 10 0--.-- ..................     \
                 001110 ..... ..... ................     @PLS_D
+
+### Prefixed No-operation Instruction
+
+PNOP            000001 11 0000-- 000000000000000000     \
+                --------------------------------
diff --git a/target/ppc/translate/fixedpoint-impl.c.inc b/target/ppc/translate/fixedpoint-impl.c.inc
index 76e1832297..7d80e3c002 100644
--- a/target/ppc/translate/fixedpoint-impl.c.inc
+++ b/target/ppc/translate/fixedpoint-impl.c.inc
@@ -58,3 +58,15 @@ static bool trans_PADDI(DisasContext *ctx, arg_PLS_D *a)
     }
     return true;
 }
+
+static bool trans_PNOP(DisasContext *ctx, arg_PNOP *a)
+{
+    /*
+     * TODO: diagnose the set of patterns that are illegal:
+     * branches, rfebb, sync other than isync, or a
+     * service processor attention.
+     * The Engineering Note allows us to either diagnose
+     * these as illegal, or treat them all as no-op.
+     */
+    return true;
+}
-- 
2.25.1