diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index b6782ba..7a6ee3f 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -21,6 +21,7 @@
 #define PPC_CPU_H
 
 #include "qemu-common.h"
+#include "qemu/int128.h"
 
 //#define PPC_EMULATE_32BITS_HYPV
 
@@ -262,6 +263,7 @@ union ppc_avr_t {
 #ifdef CONFIG_INT128
     __uint128_t u128;
 #endif
+    Int128 s128;
 };
 
 #if !defined(CONFIG_USER_ONLY)
diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index ac8901f..bc39efb 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -366,6 +366,12 @@ DEF_HELPER_3(vpmsumb, void, avr, avr, avr)
 DEF_HELPER_3(vpmsumh, void, avr, avr, avr)
 DEF_HELPER_3(vpmsumw, void, avr, avr, avr)
 DEF_HELPER_3(vpmsumd, void, avr, avr, avr)
+DEF_HELPER_2(vextublx, tl, tl, avr)
+DEF_HELPER_2(vextuhlx, tl, tl, avr)
+DEF_HELPER_2(vextuwlx, tl, tl, avr)
+DEF_HELPER_2(vextubrx, tl, tl, avr)
+DEF_HELPER_2(vextuhrx, tl, tl, avr)
+DEF_HELPER_2(vextuwrx, tl, tl, avr)
 
 DEF_HELPER_2(vsbox, void, avr, avr)
 DEF_HELPER_3(vcipher, void, avr, avr, avr)
diff --git a/target/ppc/int_helper.c b/target/ppc/int_helper.c
index 4259876..34dfe02 100644
--- a/target/ppc/int_helper.c
+++ b/target/ppc/int_helper.c
@@ -1805,6 +1805,42 @@ void helper_vlogefp(CPUPPCState *env, ppc_avr_t *r, ppc_avr_t *b)
     }
 }
 
+#if defined(HOST_WORDS_BIGENDIAN)
+#define VEXTU_X_DO(name, size, left)                                \
+    target_ulong glue(helper_, name)(target_ulong a, ppc_avr_t *b)  \
+    {                                                               \
+        int index;                                                  \
+        if (left) {                                                 \
+            index = (a & 0xf) * 8;                                  \
+        } else {                                                    \
+            index = ((15 - (a & 0xf) + 1) * 8) - size;              \
+        }                                                           \
+        return int128_getlo(int128_rshift(b->s128, index)) &        \
+            MAKE_64BIT_MASK(0, size);                               \
+    }
+#else
+#define VEXTU_X_DO(name, size, left)                                \
+    target_ulong glue(helper_, name)(target_ulong a, ppc_avr_t *b)  \
+    {                                                               \
+        int index;                                                  \
+        if (left) {                                                 \
+            index = ((15 - (a & 0xf) + 1) * 8) - size;              \
+        } else {                                                    \
+            index = (a & 0xf) * 8;                                  \
+        }                                                           \
+        return int128_getlo(int128_rshift(b->s128, index)) &        \
+            MAKE_64BIT_MASK(0, size);                               \
+    }
+#endif
+
+VEXTU_X_DO(vextublx,  8, 1)
+VEXTU_X_DO(vextuhlx, 16, 1)
+VEXTU_X_DO(vextuwlx, 32, 1)
+VEXTU_X_DO(vextubrx,  8, 0)
+VEXTU_X_DO(vextuhrx, 16, 0)
+VEXTU_X_DO(vextuwrx, 32, 0)
+#undef VEXTU_X_DO
+
 /* The specification says that the results are undefined if all of the
  * shift counts are not identical.  We check to make sure that they are
  * to conform to what real hardware appears to do.  */
diff --git a/target/ppc/translate/vmx-impl.inc.c b/target/ppc/translate/vmx-impl.inc.c
index b188e60..e8e527f 100644
--- a/target/ppc/translate/vmx-impl.inc.c
+++ b/target/ppc/translate/vmx-impl.inc.c
@@ -340,6 +340,19 @@ static void glue(gen_, name0##_##name1)(DisasContext *ctx)              \
     }                                                                   \
 }
 
+#define GEN_VXFORM_HETRO(name, opc2, opc3)                              \
+static void glue(gen_, name)(DisasContext *ctx)                         \
+{                                                                       \
+    TCGv_ptr rb;                                                        \
+    if (unlikely(!ctx->altivec_enabled)) {                              \
+        gen_exception(ctx, POWERPC_EXCP_VPU);                           \
+        return;                                                         \
+    }                                                                   \
+    rb = gen_avr_ptr(rB(ctx->opcode));                                  \
+    gen_helper_##name(cpu_gpr[rD(ctx->opcode)], cpu_gpr[rA(ctx->opcode)], rb); \
+    tcg_temp_free_ptr(rb);                                              \
+}
+
 GEN_VXFORM(vaddubm, 0, 0);
 GEN_VXFORM_DUAL_EXT(vaddubm, PPC_ALTIVEC, PPC_NONE, 0,       \
                     vmul10cuq, PPC_NONE, PPC2_ISA300, 0x0000F800)
@@ -525,6 +538,16 @@ GEN_VXFORM_ENV(vaddfp, 5, 0);
 GEN_VXFORM_ENV(vsubfp, 5, 1);
 GEN_VXFORM_ENV(vmaxfp, 5, 16);
 GEN_VXFORM_ENV(vminfp, 5, 17);
+GEN_VXFORM_HETRO(vextublx, 6, 24)
+GEN_VXFORM_HETRO(vextuhlx, 6, 25)
+GEN_VXFORM_HETRO(vextuwlx, 6, 26)
+GEN_VXFORM_DUAL(vmrgow, PPC_NONE, PPC2_ALTIVEC_207,
+                vextuwlx, PPC_NONE, PPC2_ISA300)
+GEN_VXFORM_HETRO(vextubrx, 6, 28)
+GEN_VXFORM_HETRO(vextuhrx, 6, 29)
+GEN_VXFORM_HETRO(vextuwrx, 6, 30)
+GEN_VXFORM_DUAL(vmrgew, PPC_NONE, PPC2_ALTIVEC_207, \
+                vextuwrx, PPC_NONE, PPC2_ISA300)
 
 #define GEN_VXRFORM1(opname, name, str, opc2, opc3)                     \
 static void glue(gen_, name)(DisasContext *ctx)                         \
diff --git a/target/ppc/translate/vmx-ops.inc.c b/target/ppc/translate/vmx-ops.inc.c
index 70d7d2b..57dce6e 100644
--- a/target/ppc/translate/vmx-ops.inc.c
+++ b/target/ppc/translate/vmx-ops.inc.c
@@ -91,8 +91,12 @@ GEN_VXFORM(vmrghw, 6, 2),
 GEN_VXFORM(vmrglb, 6, 4),
 GEN_VXFORM(vmrglh, 6, 5),
 GEN_VXFORM(vmrglw, 6, 6),
-GEN_VXFORM_207(vmrgew, 6, 30),
-GEN_VXFORM_207(vmrgow, 6, 26),
+GEN_VXFORM_300(vextublx, 6, 24),
+GEN_VXFORM_300(vextuhlx, 6, 25),
+GEN_VXFORM_DUAL(vmrgow, vextuwlx, 6, 26, PPC_NONE, PPC2_ALTIVEC_207),
+GEN_VXFORM_300(vextubrx, 6, 28),
+GEN_VXFORM_300(vextuhrx, 6, 29),
+GEN_VXFORM_DUAL(vmrgew, vextuwrx, 6, 30, PPC_NONE, PPC2_ALTIVEC_207),
 GEN_VXFORM(vmuloub, 4, 0),
 GEN_VXFORM(vmulouh, 4, 1),
 GEN_VXFORM_DUAL(vmulouw, vmuluwm, 4, 2, PPC_ALTIVEC, PPC_NONE),
