gradfun: x86: Factor out common code for some gradfun_filter_line() variants

libavfilter/x86/vf_gradfun_init.c

@@ -42,13 +42,13 @@ void ff_gradfun_blur_line_movdqu_sse2(intptr_t x, uint16_t *buf,
                                       uint8_t *src1, uint8_t *src2);
 
 #if HAVE_YASM
-static void gradfun_filter_line_mmxext(uint8_t *dst, uint8_t *src, uint16_t *dc,
-                                       int width, int thresh,
-                                       const uint16_t *dithers)
+static void gradfun_filter_line(uint8_t *dst, uint8_t *src, uint16_t *dc,
+                                int width, int thresh, const uint16_t *dithers,
+                                int alignment)
 {
     intptr_t x;
-    if (width & 3) {
-        x = width & ~3;
+    if (width & alignment) {
+        x = width & ~alignment;
         ff_gradfun_filter_line_c(dst + x, src + x, dc + x / 2,
                                  width - x, thresh, dithers);
         width = x;
@@ -58,21 +58,18 @@ static void gradfun_filter_line_mmxext(uint8_t *dst, uint8_t *src, uint16_t *dc,
                                   thresh, dithers);
 }
 
+static void gradfun_filter_line_mmxext(uint8_t *dst, uint8_t *src, uint16_t *dc,
+                                       int width, int thresh,
+                                       const uint16_t *dithers)
+{
+    gradfun_filter_line(dst, src, dc, width, thresh, dithers, 3);
+}
+
 static void gradfun_filter_line_ssse3(uint8_t *dst, uint8_t *src, uint16_t *dc,
                                       int width, int thresh,
                                       const uint16_t *dithers)
 {
-    intptr_t x;
-    if (width & 7) {
-        // could be 10% faster if I somehow eliminated this
-        x = width & ~7;
-        ff_gradfun_filter_line_c(dst + x, src + x, dc + x / 2,
-                                 width - x, thresh, dithers);
-        width = x;
-    }
-    x = -width;
-    ff_gradfun_filter_line_ssse3(x, dst + width, src + width, dc + width / 2,
-                                 thresh, dithers);
+    gradfun_filter_line(dst, src, dc, width, thresh, dithers, 7);
 }
 
 static void gradfun_blur_line_sse2(uint16_t *dc, uint16_t *buf, uint16_t *buf1,