diff --git a/libavutil/x86/float_dsp.asm b/libavutil/x86/float_dsp.asm
index b773e61a64..cca4d019c7 100644
--- a/libavutil/x86/float_dsp.asm
+++ b/libavutil/x86/float_dsp.asm
@@ -294,7 +294,7 @@ VECTOR_DMUL_SCALAR
 ; vector_fmul_window(float *dst, const float *src0,
 ;                    const float *src1, const float *win, int len);
 ;-----------------------------------------------------------------------------
-%macro VECTOR_FMUL_WINDOW 0
+INIT_XMM sse
 cglobal vector_fmul_window, 5, 6, 6, dst, src0, src1, win, len, len1
     shl     lend, 2
     lea    len1q, [lenq - mmsize]
@@ -305,7 +305,6 @@ cglobal vector_fmul_window, 5, 6, 6, dst, src0, src1, win, len, len1
 .loop:
     mova      m0, [winq  + lenq]
     mova      m4, [src0q + lenq]
-%if cpuflag(sse)
     mova      m1, [winq  + len1q]
     mova      m5, [src1q + len1q]
     shufps    m1, m1, 0x1b
@@ -319,34 +318,12 @@ cglobal vector_fmul_window, 5, 6, 6, dst, src0, src1, win, len, len1
     addps     m2, m3
     subps     m1, m0
     shufps    m2, m2, 0x1b
-%else
-    pswapd    m1, [winq  + len1q]
-    pswapd    m5, [src1q + len1q]
-    mova      m2, m0
-    mova      m3, m1
-    pfmul     m2, m4
-    pfmul     m3, m5
-    pfmul     m1, m4
-    pfmul     m0, m5
-    pfadd     m2, m3
-    pfsub     m1, m0
-    pswapd    m2, m2
-%endif
     mova      [dstq + lenq], m1
     mova      [dstq + len1q], m2
     sub       len1q, mmsize
     add       lenq,  mmsize
     jl .loop
-%if mmsize == 8
-    femms
-%endif
     REP_RET
-%endmacro
-
-INIT_MMX 3dnowext
-VECTOR_FMUL_WINDOW
-INIT_XMM sse
-VECTOR_FMUL_WINDOW
 
 ;-----------------------------------------------------------------------------
 ; vector_fmul_add(float *dst, const float *src0, const float *src1,
diff --git a/libavutil/x86/float_dsp_init.c b/libavutil/x86/float_dsp_init.c
index 8826e4e2c9..ad17bc2044 100644
--- a/libavutil/x86/float_dsp_init.c
+++ b/libavutil/x86/float_dsp_init.c
@@ -56,8 +56,6 @@ void ff_vector_dmul_scalar_sse2(double *dst, const double *src,
 void ff_vector_dmul_scalar_avx(double *dst, const double *src,
                                double mul, int len);
 
-void ff_vector_fmul_window_3dnowext(float *dst, const float *src0,
-                                    const float *src1, const float *win, int len);
 void ff_vector_fmul_window_sse(float *dst, const float *src0,
                                const float *src1, const float *win, int len);
 
@@ -83,9 +81,6 @@ av_cold void ff_float_dsp_init_x86(AVFloatDSPContext *fdsp)
 {
     int cpu_flags = av_get_cpu_flags();
 
-    if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
-        fdsp->vector_fmul_window = ff_vector_fmul_window_3dnowext;
-    }
     if (EXTERNAL_SSE(cpu_flags)) {
         fdsp->vector_fmul = ff_vector_fmul_sse;
         fdsp->vector_fmac_scalar = ff_vector_fmac_scalar_sse;