diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index a1c2962..3041199 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -344,6 +344,9 @@ 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(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 51a9ac5..c24cc07 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -1705,6 +1705,43 @@ void helper_vlogefp(CPUPPCState *env, ppc_avr_t *r, ppc_avr_t *b)
     }
 }
 
+#if defined(HOST_WORDS_BIGENDIAN)
+#define VEXTULX_DO(name, elem)                                  \
+target_ulong glue(helper_, name)(target_ulong a, ppc_avr_t *b)  \
+{                                                               \
+    target_ulong r = 0;                                         \
+    int i;                                                      \
+    int index = a & 0xf;                                        \
+    for (i = 0; i < elem; i++) {                                \
+        r = r << 8;                                             \
+        if (index + i <= 15) {                                  \
+            r = r | b->u8[index + i];                           \
+        }                                                       \
+    }                                                           \
+    return r;                                                   \
+}
+#else
+#define VEXTULX_DO(name, elem)                                  \
+target_ulong glue(helper_, name)(target_ulong a, ppc_avr_t *b)  \
+{                                                               \
+    target_ulong r = 0;                                         \
+    int i;                                                      \
+    int index = 15 - (a & 0xf);                                 \
+    for (i = 0; i < elem; i++) {                                \
+        r = r << 8;                                             \
+        if (index - i >= 0) {                                   \
+            r = r | b->u8[index - i];                           \
+        }                                                       \
+    }                                                           \
+    return r;                                                   \
+}
+#endif
+
+VEXTULX_DO(vextublx, 1)
+VEXTULX_DO(vextuhlx, 2)
+VEXTULX_DO(vextuwlx, 4)
+#undef VEXTULX_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 abfde27..815ba96 100644
--- a/target-ppc/translate/vmx-impl.inc.c
+++ b/target-ppc/translate/vmx-impl.inc.c
@@ -342,6 +342,19 @@ 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_NONE, PPC2_ALTIVEC_207, 0,       \
                     vmul10cuq, PPC_NONE, PPC2_ISA300, 0x0000F800)
@@ -516,6 +529,12 @@ 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)
+
 #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 5d47b0f..3e0047d 100644
--- a/target-ppc/translate/vmx-ops.inc.c
+++ b/target-ppc/translate/vmx-ops.inc.c
@@ -91,8 +91,10 @@ GEN_VXFORM(vmrghw, 6, 2),
 GEN_VXFORM(vmrglb, 6, 4),
 GEN_VXFORM(vmrglh, 6, 5),
 GEN_VXFORM(vmrglw, 6, 6),
+GEN_VXFORM_300(vextublx, 6, 24),
+GEN_VXFORM_300(vextuhlx, 6, 25),
+GEN_VXFORM_DUAL(vmrgow, vextuwlx, 6, 26, PPC_ALTIVEC, PPC_NONE),
 GEN_VXFORM_207(vmrgew, 6, 30),
-GEN_VXFORM_207(vmrgow, 6, 26),
 GEN_VXFORM(vmuloub, 4, 0),
 GEN_VXFORM(vmulouh, 4, 1),
 GEN_VXFORM_DUAL(vmulouw, vmuluwm, 4, 2, PPC_ALTIVEC, PPC_NONE),
