diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index a4480e8a79..1106e29443 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -109,9 +109,11 @@ DEF_HELPER_FLAGS_1(ftsqrt, TCG_CALL_NO_RWG_SE, i32, i64)
 DEF_HELPER_3(vaddubm, void, avr, avr, avr)
 DEF_HELPER_3(vadduhm, void, avr, avr, avr)
 DEF_HELPER_3(vadduwm, void, avr, avr, avr)
+DEF_HELPER_3(vaddudm, void, avr, avr, avr)
 DEF_HELPER_3(vsububm, void, avr, avr, avr)
 DEF_HELPER_3(vsubuhm, void, avr, avr, avr)
 DEF_HELPER_3(vsubuwm, void, avr, avr, avr)
+DEF_HELPER_3(vsubudm, void, avr, avr, avr)
 DEF_HELPER_3(vavgub, void, avr, avr, avr)
 DEF_HELPER_3(vavguh, void, avr, avr, avr)
 DEF_HELPER_3(vavguw, void, avr, avr, avr)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 71db3fb076..3e36c0aa3c 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -504,6 +504,7 @@ void helper_vaddcuw(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
 VARITH(ubm, u8)
 VARITH(uhm, u16)
 VARITH(uwm, u32)
+VARITH(udm, u64)
 #undef VARITH_DO
 #undef VARITH
 
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index ed1cf1d98e..b1986f4b07 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -6932,9 +6932,11 @@ static void glue(gen_, name0##_##name1)(DisasContext *ctx)             \
 GEN_VXFORM(vaddubm, 0, 0);
 GEN_VXFORM(vadduhm, 0, 1);
 GEN_VXFORM(vadduwm, 0, 2);
+GEN_VXFORM(vaddudm, 0, 3);
 GEN_VXFORM(vsububm, 0, 16);
 GEN_VXFORM(vsubuhm, 0, 17);
 GEN_VXFORM(vsubuwm, 0, 18);
+GEN_VXFORM(vsubudm, 0, 19);
 GEN_VXFORM(vmaxub, 1, 0);
 GEN_VXFORM(vmaxuh, 1, 1);
 GEN_VXFORM(vmaxuw, 1, 2);
@@ -10338,9 +10340,11 @@ GEN_HANDLER_E(name0##_##name1, 0x4, opc2, (opc3 | 0x10), 0x00000000, tp0, tp1),
 GEN_VXFORM(vaddubm, 0, 0),
 GEN_VXFORM(vadduhm, 0, 1),
 GEN_VXFORM(vadduwm, 0, 2),
+GEN_VXFORM_207(vaddudm, 0, 3),
 GEN_VXFORM(vsububm, 0, 16),
 GEN_VXFORM(vsubuhm, 0, 17),
 GEN_VXFORM(vsubuwm, 0, 18),
+GEN_VXFORM_207(vsubudm, 0, 19),
 GEN_VXFORM(vmaxub, 1, 0),
 GEN_VXFORM(vmaxuh, 1, 1),
 GEN_VXFORM(vmaxuw, 1, 2),