x86: Use *_FAST/*_SLOW CPU feature detection macros where appropriate

libavcodec/x86/ac3dsp_init.c

@@ -223,16 +223,19 @@ av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
         c->float_to_fixed24 = ff_float_to_fixed24_sse2;
         c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
         c->extract_exponents = ff_ac3_extract_exponents_sse2;
-        if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
-            c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
-            c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
-        }
         if (bit_exact) {
             c->apply_window_int16 = ff_apply_window_int16_sse2;
-        } else if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
+        }
+    }
+
+    if (EXTERNAL_SSE2_FAST(cpu_flags)) {
+        c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
+        c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
+        if (!bit_exact) {
             c->apply_window_int16 = ff_apply_window_int16_round_sse2;
         }
     }
+
     if (EXTERNAL_SSSE3(cpu_flags)) {
         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
         if (cpu_flags & AV_CPU_FLAG_ATOM) {

libavcodec/x86/h264_qpel.c

@@ -566,11 +566,6 @@ av_cold void ff_h264qpel_init_x86(H264QpelContext *c, int bit_depth)
     }
 
     if (EXTERNAL_SSE2(cpu_flags)) {
-        if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW) && !high_bit_depth) {
-            // these functions are slower than mmx on AMD, but faster on Intel
-            H264_QPEL_FUNCS(0, 0, sse2);
-        }
-
         if (!high_bit_depth) {
             H264_QPEL_FUNCS(0, 1, sse2);
             H264_QPEL_FUNCS(0, 2, sse2);
@@ -597,6 +592,12 @@ av_cold void ff_h264qpel_init_x86(H264QpelContext *c, int bit_depth)
         }
     }
 
+    if (EXTERNAL_SSE2_FAST(cpu_flags)) {
+        if (!high_bit_depth) {
+            H264_QPEL_FUNCS(0, 0, sse2);
+        }
+    }
+
     if (EXTERNAL_SSSE3(cpu_flags)) {
         if (!high_bit_depth) {
             H264_QPEL_FUNCS(1, 0, ssse3);

libavcodec/x86/lpc.c

@@ -152,7 +152,7 @@ av_cold void ff_lpc_init_x86(LPCContext *c)
 #if HAVE_SSE2_INLINE
     int cpu_flags = av_get_cpu_flags();
 
-    if (INLINE_SSE2(cpu_flags) && (cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
+    if (INLINE_SSE2_SLOW(cpu_flags)) {
         c->lpc_apply_welch_window = lpc_apply_welch_window_sse2;
         c->lpc_compute_autocorr   = lpc_compute_autocorr_sse2;
     }

libavcodec/x86/vp8dsp_init.c

@@ -346,7 +346,7 @@ av_cold void ff_vp78dsp_init_x86(VP8DSPContext *c)
         c->put_vp8_bilinear_pixels_tab[0][0][0] = ff_put_vp8_pixels16_sse;
     }
 
-    if (EXTERNAL_SSE2(cpu_flags) && (cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
+    if (EXTERNAL_SSE2_SLOW(cpu_flags)) {
         VP8_LUMA_MC_FUNC(0, 16, sse2);
         VP8_MC_FUNC(1, 8, sse2);
         VP8_BILINEAR_MC_FUNC(0, 16, sse2);
@@ -416,7 +416,7 @@ av_cold void ff_vp8dsp_init_x86(VP8DSPContext *c)
         c->vp8_luma_dc_wht                      = ff_vp8_luma_dc_wht_sse;
     }
 
-    if (EXTERNAL_SSE2(cpu_flags) && (cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
+    if (EXTERNAL_SSE2_SLOW(cpu_flags)) {
         c->vp8_v_loop_filter_simple = ff_vp8_v_loop_filter_simple_sse2;
 
         c->vp8_v_loop_filter16y_inner = ff_vp8_v_loop_filter16y_inner_sse2;