diff --git a/libavcodec/x86/h264_intrapred.asm b/libavcodec/x86/h264_intrapred.asm
index 74e604d496..0aece928f2 100644
--- a/libavcodec/x86/h264_intrapred.asm
+++ b/libavcodec/x86/h264_intrapred.asm
@@ -2259,6 +2259,137 @@ cglobal pred8x8l_horizontal_down_mmxext, 4,5
     PALIGNR    mm3, mm4, 6, mm4
     movq [r0+r3*1], mm3
     RET
+
+%macro PRED8x8L_HORIZONTAL_DOWN 1
+cglobal pred8x8l_horizontal_down_%1, 4,5
+    sub          r0, r3
+    lea          r4, [r0+r3*2]
+    movq        mm0, [r0+r3*1-8]
+    punpckhbw   mm0, [r0+r3*0-8]
+    movq        mm1, [r4+r3*1-8]
+    punpckhbw   mm1, [r0+r3*2-8]
+    mov          r4, r0
+    punpckhwd   mm1, mm0
+    lea          r0, [r0+r3*4]
+    movq        mm2, [r0+r3*1-8]
+    punpckhbw   mm2, [r0+r3*0-8]
+    lea          r0, [r0+r3*2]
+    movq        mm3, [r0+r3*1-8]
+    punpckhbw   mm3, [r0+r3*0-8]
+    punpckhwd   mm3, mm2
+    punpckhdq   mm3, mm1
+    lea          r0, [r0+r3*2]
+    movq        mm0, [r0+r3*0-8]
+    movq        mm1, [r4]
+    mov          r0, r4
+    movq        mm4, mm3
+    movq        mm2, mm3
+    PALIGNR     mm4, mm0, 7, mm0
+    PALIGNR     mm1, mm2, 1, mm2
+    test        r1, r1
+    jnz .do_left
+.fix_lt_1:
+    movq        mm5, mm3
+    pxor        mm5, mm4
+    psrlq       mm5, 56
+    psllq       mm5, 48
+    pxor        mm1, mm5
+    jmp .do_left
+.fix_lt_2:
+    movq        mm5, mm3
+    pxor        mm5, mm2
+    psllq       mm5, 56
+    psrlq       mm5, 56
+    pxor        mm2, mm5
+    test         r2, r2
+    jnz .do_top
+.fix_tr_1:
+    movq        mm5, mm3
+    pxor        mm5, mm1
+    psrlq       mm5, 56
+    psllq       mm5, 56
+    pxor        mm1, mm5
+    jmp .do_top
+.fix_tr_2:
+    punpckhbw   mm3, mm3
+    pshufw      mm1, mm3, 0xFF
+    jmp .do_topright
+.do_left:
+    movq        mm0, mm4
+    PRED4x4_LOWPASS mm2, mm1, mm4, mm3, mm5
+    movq2dq    xmm0, mm2
+    pslldq     xmm0, 8
+    movq        mm4, mm0
+    PRED4x4_LOWPASS mm1, mm3, mm0, mm4, mm5
+    movq2dq    xmm2, mm1
+    pslldq     xmm2, 15
+    psrldq     xmm2, 8
+    por        xmm0, xmm2
+    movq        mm0, [r0-8]
+    movq        mm3, [r0]
+    movq        mm1, [r0+8]
+    movq        mm2, mm3
+    movq        mm4, mm3
+    PALIGNR     mm2, mm0, 7, mm0
+    PALIGNR     mm1, mm4, 1, mm4
+    test         r1, r1
+    jz .fix_lt_2
+    test         r2, r2
+    jz .fix_tr_1
+.do_top:
+    PRED4x4_LOWPASS mm4, mm2, mm1, mm3, mm5
+    movq2dq    xmm1, mm4
+    test         r2, r2
+    jz .fix_tr_2
+    movq        mm0, [r0+8]
+    movq        mm5, mm0
+    movq        mm2, mm0
+    movq        mm4, mm0
+    psrlq       mm5, 56
+    PALIGNR     mm2, mm3, 7, mm3
+    PALIGNR     mm5, mm4, 1, mm4
+    PRED4x4_LOWPASS mm1, mm2, mm5, mm0, mm4
+.do_topright:
+    movq2dq    xmm5, mm1
+    pslldq     xmm5, 8
+    por        xmm1, xmm5
+INIT_XMM
+    lea         r2, [r4+r3*2]
+    movdqa    xmm2, xmm1
+    movdqa    xmm3, xmm1
+    PALIGNR   xmm1, xmm0, 7, xmm4
+    PALIGNR   xmm2, xmm0, 9, xmm5
+    lea         r1, [r2+r3*2]
+    PALIGNR   xmm3, xmm0, 8, xmm0
+    movdqa    xmm4, xmm1
+    pavgb     xmm4, xmm3
+    lea         r0, [r1+r3*2]
+    PRED4x4_LOWPASS xmm0, xmm1, xmm2, xmm3, xmm5
+    punpcklbw xmm4, xmm0
+    movhlps   xmm0, xmm4
+    movq   [r0+r3*2], xmm4
+    movq   [r2+r3*2], xmm0
+    psrldq xmm4, 2
+    psrldq xmm0, 2
+    movq   [r0+r3*1], xmm4
+    movq   [r2+r3*1], xmm0
+    psrldq xmm4, 2
+    psrldq xmm0, 2
+    movq   [r1+r3*2], xmm4
+    movq   [r4+r3*2], xmm0
+    psrldq xmm4, 2
+    psrldq xmm0, 2
+    movq   [r1+r3*1], xmm4
+    movq   [r4+r3*1], xmm0
+    RET
+%endmacro
+
+INIT_MMX
+%define PALIGNR PALIGNR_MMX
+PRED8x8L_HORIZONTAL_DOWN sse2
+INIT_MMX
+%define PALIGNR PALIGNR_SSSE3
+PRED8x8L_HORIZONTAL_DOWN ssse3
 %endif
 
 ;-----------------------------------------------------------------------------
diff --git a/libavcodec/x86/h264_intrapred_init.c b/libavcodec/x86/h264_intrapred_init.c
index 7c1675ccb1..ffc1fccc82 100644
--- a/libavcodec/x86/h264_intrapred_init.c
+++ b/libavcodec/x86/h264_intrapred_init.c
@@ -80,6 +80,8 @@ void ff_pred8x8l_vertical_left_ssse3(uint8_t *src, int has_topleft, int has_topr
 void ff_pred8x8l_horizontal_up_mmxext(uint8_t *src, int has_topleft, int has_topright, int stride);
 void ff_pred8x8l_horizontal_up_ssse3(uint8_t *src, int has_topleft, int has_topright, int stride);
 void ff_pred8x8l_horizontal_down_mmxext(uint8_t *src, int has_topleft, int has_topright, int stride);
+void ff_pred8x8l_horizontal_down_sse2(uint8_t *src, int has_topleft, int has_topright, int stride);
+void ff_pred8x8l_horizontal_down_ssse3(uint8_t *src, int has_topleft, int has_topright, int stride);
 void ff_pred4x4_dc_mmxext          (uint8_t *src, const uint8_t *topright, int stride);
 void ff_pred4x4_down_left_mmxext   (uint8_t *src, const uint8_t *topright, int stride);
 void ff_pred4x4_tm_vp8_mmx         (uint8_t *src, const uint8_t *topright, int stride);
@@ -165,6 +167,7 @@ void ff_h264_pred_init_x86(H264PredContext *h, int codec_id)
         h->pred8x8l [DIAG_DOWN_RIGHT_PRED] = ff_pred8x8l_down_right_sse2;
         h->pred8x8l [VERT_RIGHT_PRED     ] = ff_pred8x8l_vertical_right_sse2;
         h->pred8x8l [VERT_LEFT_PRED      ] = ff_pred8x8l_vertical_left_sse2;
+        h->pred8x8l [HOR_DOWN_PRED       ] = ff_pred8x8l_horizontal_down_sse2;
 #endif
         if (codec_id == CODEC_ID_VP8) {
             h->pred16x16[PLANE_PRED8x8] = ff_pred16x16_tm_vp8_sse2;
@@ -195,6 +198,7 @@ void ff_h264_pred_init_x86(H264PredContext *h, int codec_id)
         h->pred8x8l [VERT_RIGHT_PRED     ] = ff_pred8x8l_vertical_right_ssse3;
         h->pred8x8l [VERT_LEFT_PRED      ] = ff_pred8x8l_vertical_left_ssse3;
         h->pred8x8l [HOR_UP_PRED         ] = ff_pred8x8l_horizontal_up_ssse3;
+        h->pred8x8l [HOR_DOWN_PRED       ] = ff_pred8x8l_horizontal_down_ssse3;
 #endif
         if (codec_id == CODEC_ID_VP8) {
             h->pred8x8  [PLANE_PRED8x8] = ff_pred8x8_tm_vp8_ssse3;