diff --git a/libavcodec/x86/dsputil_mmx.c b/libavcodec/x86/dsputil_mmx.c
index 7cc16c0f82..c40cab51f0 100644
--- a/libavcodec/x86/dsputil_mmx.c
+++ b/libavcodec/x86/dsputil_mmx.c
@@ -2313,6 +2313,9 @@ void ff_apply_window_int16_ssse3     (int16_t *output, const int16_t *input,
 void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input,
                                       const int16_t *window, unsigned int len);
 
+void ff_bswap32_buf_ssse3(uint32_t *dst, const uint32_t *src, int w);
+void ff_bswap32_buf_sse2(uint32_t *dst, const uint32_t *src, int w);
+
 void ff_add_hfyu_median_prediction_mmx2(uint8_t *dst, const uint8_t *top, const uint8_t *diff, int w, int *left, int *left_top);
 int  ff_add_hfyu_left_prediction_ssse3(uint8_t *dst, const uint8_t *src, int w, int left);
 int  ff_add_hfyu_left_prediction_sse4(uint8_t *dst, const uint8_t *src, int w, int left);
@@ -2798,6 +2801,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
                     c->apply_window_int16 = ff_apply_window_int16_sse2;
                 }
             }
+            c->bswap_buf = ff_bswap32_buf_sse2;
 #endif
         }
         if (mm_flags & AV_CPU_FLAG_SSSE3) {
@@ -2810,6 +2814,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
             if (!(mm_flags & (AV_CPU_FLAG_SSE42|AV_CPU_FLAG_3DNOW))) { // cachesplit
                 c->scalarproduct_and_madd_int16 = ff_scalarproduct_and_madd_int16_ssse3;
             }
+            c->bswap_buf = ff_bswap32_buf_ssse3;
 #endif
         }
 
diff --git a/libavcodec/x86/dsputil_yasm.asm b/libavcodec/x86/dsputil_yasm.asm
index 4607ff15d7..611f5c8a72 100644
--- a/libavcodec/x86/dsputil_yasm.asm
+++ b/libavcodec/x86/dsputil_yasm.asm
@@ -30,6 +30,7 @@ pb_zzzz3333zzzzbbbb: db -1,-1,-1,-1,3,3,3,3,-1,-1,-1,-1,11,11,11,11
 pb_zz11zz55zz99zzdd: db -1,-1,1,1,-1,-1,5,5,-1,-1,9,9,-1,-1,13,13
 pb_revwords: db 14, 15, 12, 13, 10, 11, 8, 9, 6, 7, 4, 5, 2, 3, 0, 1
 pd_16384: times 4 dd 16384
+pb_bswap32: db 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
 
 SECTION_TEXT
 
@@ -1178,3 +1179,125 @@ INIT_XMM sse
 BUTTERFLIES_FLOAT_INTERLEAVE
 INIT_YMM avx
 BUTTERFLIES_FLOAT_INTERLEAVE
+
+INIT_XMM sse2
+; %1 = aligned/unaligned
+%macro BSWAP_LOOPS_SSE2  1
+    mov      r3, r2
+    sar      r2, 3
+    jz       .left4_%1
+.loop8_%1:
+    mov%1    m0, [r1 +  0]
+    mov%1    m1, [r1 + 16]
+    pshuflw  m0, m0, 10110001b
+    pshuflw  m1, m1, 10110001b
+    pshufhw  m0, m0, 10110001b
+    pshufhw  m1, m1, 10110001b
+    mova     m2, m0
+    mova     m3, m1
+    psllw    m0, 8
+    psllw    m1, 8
+    psrlw    m2, 8
+    psrlw    m3, 8
+    por      m2, m0
+    por      m3, m1
+    mova     [r0 +  0], m2
+    mova     [r0 + 16], m3
+    add      r1, 32
+    add      r0, 32
+    dec      r2
+    jnz      .loop8_%1
+.left4_%1:
+    mov      r2, r3
+    and      r3, 4
+    jz       .left
+    mov%1    m0, [r1]
+    pshuflw  m0, m0, 10110001b
+    pshufhw  m0, m0, 10110001b
+    mova     m2, m0
+    psllw    m0, 8
+    psrlw    m2, 8
+    por      m2, m0
+    mova     [r0], m2
+    add      r1, 16
+    add      r0, 16
+%endmacro
+
+; void bswap_buf(uint32_t *dst, const uint32_t *src, int w);
+cglobal bswap32_buf, 3,4,5
+    mov      r3, r1
+    and      r3, 15
+    jz       .start_align
+    BSWAP_LOOPS_SSE2  u
+    jmp      .left
+.start_align:
+    BSWAP_LOOPS_SSE2  a
+.left:
+    and      r2, 3
+    jz       .end
+.loop2:
+    mov      r3d, [r1]
+    bswap    r3d
+    mov      [r0], r3d
+    add      r1, 4
+    add      r0, 4
+    dec      r2
+    jnz      .loop2
+.end
+    RET
+
+; %1 = aligned/unaligned
+%macro BSWAP_LOOPS_SSSE3  1
+    mov      r3, r2
+    sar      r2, 3
+    jz       .left4_%1
+.loop8_%1:
+    mov%1    m0, [r1 +  0]
+    mov%1    m1, [r1 + 16]
+    pshufb   m0, m2
+    pshufb   m1, m2
+    mova     [r0 +  0], m0
+    mova     [r0 + 16], m1
+    add      r0, 32
+    add      r1, 32
+    dec      r2
+    jnz      .loop8_%1
+.left4_%1:
+    mov      r2, r3
+    and      r3, 4
+    jz       .left2
+    mov%1    m0, [r1]
+    pshufb   m0, m2
+    mova     [r0], m0
+    add      r1, 16
+    add      r0, 16
+%endmacro
+
+INIT_XMM ssse3
+; void bswap_buf(uint32_t *dst, const uint32_t *src, int w);
+cglobal bswap32_buf, 3,4,3
+    mov      r3, r1
+    mova     m2, [pb_bswap32]
+    and      r3, 15
+    jz       .start_align
+    BSWAP_LOOPS_SSSE3  u
+    jmp      .left2
+.start_align:
+    BSWAP_LOOPS_SSSE3  a
+.left2:
+    mov      r3, r2
+    and      r2, 2
+    jz       .left1
+    movq     m0, [r1]
+    pshufb   m0, m2
+    movq     [r0], m0
+    add      r1, 8
+    add      r0, 8
+.left1:
+    and      r3, 1
+    jz       .end
+    mov      r2d, [r1]
+    bswap    r2d
+    mov      [r0], r2d
+.end:
+    RET