diff --git a/libavcodec/x86/dcadsp_init.c b/libavcodec/x86/dcadsp_init.c
index bb86c26037..1a19f6b807 100644
--- a/libavcodec/x86/dcadsp_init.c
+++ b/libavcodec/x86/dcadsp_init.c
@@ -103,10 +103,10 @@ av_cold void ff_synth_filter_init_x86(SynthFilterContext *s)
     if (EXTERNAL_SSE2(cpu_flags)) {
         s->synth_filter_float = synth_filter_sse2;
     }
-    if (EXTERNAL_AVX(cpu_flags)) {
+    if (EXTERNAL_AVX_FAST(cpu_flags)) {
         s->synth_filter_float = synth_filter_avx;
     }
-    if (EXTERNAL_FMA3(cpu_flags)) {
+    if (EXTERNAL_FMA3(cpu_flags) && !(cpu_flags & AV_CPU_FLAG_AVXSLOW)) {
         s->synth_filter_float = synth_filter_fma3;
     }
 #endif /* HAVE_YASM */
diff --git a/libavcodec/x86/dct_init.c b/libavcodec/x86/dct_init.c
index 30c8f12bf2..daf2bb4e5d 100644
--- a/libavcodec/x86/dct_init.c
+++ b/libavcodec/x86/dct_init.c
@@ -34,6 +34,6 @@ av_cold void ff_dct_init_x86(DCTContext *s)
         s->dct32 = ff_dct32_float_sse;
     if (EXTERNAL_SSE2(cpu_flags))
         s->dct32 = ff_dct32_float_sse2;
-    if (EXTERNAL_AVX(cpu_flags))
+    if (EXTERNAL_AVX_FAST(cpu_flags))
         s->dct32 = ff_dct32_float_avx;
 }
diff --git a/libavcodec/x86/fft_init.c b/libavcodec/x86/fft_init.c
index 5682230c8e..5085f11380 100644
--- a/libavcodec/x86/fft_init.c
+++ b/libavcodec/x86/fft_init.c
@@ -48,7 +48,7 @@ av_cold void ff_fft_init_x86(FFTContext *s)
         s->fft_calc    = ff_fft_calc_sse;
         s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
     }
-    if (EXTERNAL_AVX(cpu_flags) && s->nbits >= 5) {
+    if (EXTERNAL_AVX_FAST(cpu_flags) && s->nbits >= 5) {
         /* AVX for SB */
         s->imdct_half      = ff_imdct_half_avx;
         s->fft_calc        = ff_fft_calc_avx;
diff --git a/libavcodec/x86/vp9dsp_init.c b/libavcodec/x86/vp9dsp_init.c
index 979bd936ac..00e7125a0c 100644
--- a/libavcodec/x86/vp9dsp_init.c
+++ b/libavcodec/x86/vp9dsp_init.c
@@ -483,12 +483,14 @@ av_cold void ff_vp9dsp_init_x86(VP9DSPContext *dsp, int bpp)
         dsp->itxfm_add[TX_32X32][ADST_DCT] =
         dsp->itxfm_add[TX_32X32][DCT_ADST] =
         dsp->itxfm_add[TX_32X32][DCT_DCT] = ff_vp9_idct_idct_32x32_add_avx;
-        init_fpel(1, 0, 32, put, avx);
-        init_fpel(0, 0, 64, put, avx);
         init_lpf(avx);
         init_dir_tm_h_ipred(8, avx);
         init_dir_tm_h_ipred(16, avx);
         init_dir_tm_h_ipred(32, avx);
+    }
+    if (EXTERNAL_AVX_FAST(cpu_flags)) {
+        init_fpel(1, 0, 32, put, avx);
+        init_fpel(0, 0, 64, put, avx);
         init_ipred(32, avx, v, VERT);
     }
 
diff --git a/libavfilter/x86/af_volume_init.c b/libavfilter/x86/af_volume_init.c
index 57c7eab65f..88f5a9679a 100644
--- a/libavfilter/x86/af_volume_init.c
+++ b/libavfilter/x86/af_volume_init.c
@@ -52,7 +52,7 @@ av_cold void ff_volume_init_x86(VolumeContext *vol)
             vol->scale_samples = ff_scale_samples_s32_ssse3_atom;
             vol->samples_align = 4;
         }
-        if (EXTERNAL_AVX(cpu_flags)) {
+        if (EXTERNAL_AVX_FAST(cpu_flags)) {
             vol->scale_samples = ff_scale_samples_s32_avx;
             vol->samples_align = 8;
         }
diff --git a/libavutil/x86/float_dsp_init.c b/libavutil/x86/float_dsp_init.c
index 64b3a4d6bd..f211f2396b 100644
--- a/libavutil/x86/float_dsp_init.c
+++ b/libavutil/x86/float_dsp_init.c
@@ -85,14 +85,14 @@ av_cold void ff_float_dsp_init_x86(AVFloatDSPContext *fdsp)
     if (EXTERNAL_SSE2(cpu_flags)) {
         fdsp->vector_dmul_scalar = ff_vector_dmul_scalar_sse2;
     }
-    if (EXTERNAL_AVX(cpu_flags)) {
+    if (EXTERNAL_AVX_FAST(cpu_flags)) {
         fdsp->vector_fmul = ff_vector_fmul_avx;
         fdsp->vector_fmac_scalar = ff_vector_fmac_scalar_avx;
         fdsp->vector_dmul_scalar = ff_vector_dmul_scalar_avx;
         fdsp->vector_fmul_add    = ff_vector_fmul_add_avx;
         fdsp->vector_fmul_reverse = ff_vector_fmul_reverse_avx;
     }
-    if (EXTERNAL_FMA3(cpu_flags)) {
+    if (EXTERNAL_FMA3(cpu_flags) && !(cpu_flags & AV_CPU_FLAG_AVXSLOW)) {
         fdsp->vector_fmac_scalar = ff_vector_fmac_scalar_fma3;
         fdsp->vector_fmul_add    = ff_vector_fmul_add_fma3;
     }
diff --git a/libavutil/x86/lls_init.c b/libavutil/x86/lls_init.c
index f53190488a..81f141cbeb 100644
--- a/libavutil/x86/lls_init.c
+++ b/libavutil/x86/lls_init.c
@@ -35,7 +35,7 @@ av_cold void ff_init_lls_x86(LLSModel *m)
         if (m->indep_count >= 4)
             m->evaluate_lls = ff_evaluate_lls_sse2;
     }
-    if (EXTERNAL_AVX(cpu_flags)) {
+    if (EXTERNAL_AVX_FAST(cpu_flags)) {
         m->update_lls = ff_update_lls_avx;
     }
 }
diff --git a/libswresample/x86/audio_convert_init.c b/libswresample/x86/audio_convert_init.c
index 7f25d981a9..5e5e91d142 100644
--- a/libswresample/x86/audio_convert_init.c
+++ b/libswresample/x86/audio_convert_init.c
@@ -145,9 +145,11 @@ MULTI_CAPS_FUNC(SSE2, sse2)
                 ac->simd_f =  ff_unpack_2ch_int16_to_float_a_ssse3;
         }
     }
-    if(EXTERNAL_AVX(mm_flags)) {
+    if(EXTERNAL_AVX_FAST(mm_flags)) {
         if(   out_fmt == AV_SAMPLE_FMT_FLT  && in_fmt == AV_SAMPLE_FMT_S32 || out_fmt == AV_SAMPLE_FMT_FLTP && in_fmt == AV_SAMPLE_FMT_S32P)
             ac->simd_f =  ff_int32_to_float_a_avx;
+    }
+    if(EXTERNAL_AVX(mm_flags)) {
         if(channels == 6) {
             if(   out_fmt == AV_SAMPLE_FMT_FLT  && in_fmt == AV_SAMPLE_FMT_FLTP || out_fmt == AV_SAMPLE_FMT_S32 && in_fmt == AV_SAMPLE_FMT_S32P)
                 ac->simd_f =  ff_pack_6ch_float_to_float_a_avx;
diff --git a/libswresample/x86/rematrix_init.c b/libswresample/x86/rematrix_init.c
index 918479a4a8..5f2c5fe170 100644
--- a/libswresample/x86/rematrix_init.c
+++ b/libswresample/x86/rematrix_init.c
@@ -73,7 +73,7 @@ av_cold int swri_rematrix_init_x86(struct SwrContext *s){
             s->mix_1_1_simd = ff_mix_1_1_a_float_sse;
             s->mix_2_1_simd = ff_mix_2_1_a_float_sse;
         }
-        if(EXTERNAL_AVX(mm_flags)) {
+        if(EXTERNAL_AVX_FAST(mm_flags)) {
             s->mix_1_1_simd = ff_mix_1_1_a_float_avx;
             s->mix_2_1_simd = ff_mix_2_1_a_float_avx;
         }
diff --git a/libswresample/x86/resample_init.c b/libswresample/x86/resample_init.c
index 93001d65cb..bc444cfb8b 100644
--- a/libswresample/x86/resample_init.c
+++ b/libswresample/x86/resample_init.c
@@ -67,11 +67,11 @@ av_cold void swri_resample_dsp_x86_init(ResampleContext *c)
             c->dsp.resample = c->linear ? ff_resample_linear_float_sse
                                         : ff_resample_common_float_sse;
         }
-        if (EXTERNAL_AVX(mm_flags)) {
+        if (EXTERNAL_AVX_FAST(mm_flags)) {
             c->dsp.resample = c->linear ? ff_resample_linear_float_avx
                                         : ff_resample_common_float_avx;
         }
-        if (EXTERNAL_FMA3(mm_flags)) {
+        if (EXTERNAL_FMA3(mm_flags) && !(mm_flags & AV_CPU_FLAG_AVXSLOW)) {
             c->dsp.resample = c->linear ? ff_resample_linear_float_fma3
                                         : ff_resample_common_float_fma3;
         }