format

Author: Starbuck5

src_c/simd_blitters_avx2.c

@@ -346,48 +346,51 @@ alphablit_alpha_avx2_argb_surf_alpha(SDL_BlitInfo *info)
      dstA = srcA + dstA - ((srcA * dstA) / 255);
      */
 
-    RUN_AVX2_BLITTER(RUN_16BIT_SHUFFLE_OUT(
-        src_alpha = _mm256_shuffle_epi8(shuff_src, shuff_out_alpha);
-
-        // src_alpha = src_alpha * module_alpha / 255
-        src_alpha = _mm256_mullo_epi16(src_alpha, modulate_alpha);
-        src_alpha = _mm256_srli_epi16(
-            _mm256_mulhi_epu16(src_alpha, _mm256_set1_epi16((short)0x8081)),
-            7);
-
-        dst_alpha = _mm256_shuffle_epi8(shuff_dst, shuff_out_alpha);
-        // if the destination is opaque, it takes the max of each alpha with 255
-        // otherwise it takes with the max with 0. This is equivalent to
-        // if opaque: alpha = 255
-        dst_alpha = _mm256_max_epi16(dst_alpha, _mm256_set1_epi16(dst_alpha_offset));
-
-        // figure out alpha
-        temp = _mm256_mullo_epi16(src_alpha, dst_alpha);
-        temp = _mm256_srli_epi16(
-            _mm256_mulhi_epu16(temp, _mm256_set1_epi16((short)0x8081)), 7);
-        new_dst_alpha = _mm256_sub_epi16(dst_alpha, temp);
-        new_dst_alpha = _mm256_add_epi16(src_alpha, new_dst_alpha);
-
-        // if preexisting dst alpha is 0, src alpha should be set to 255
-        // enforces that dest alpha 0 means "copy source RGB"
-        // happens after real src alpha values used to calculate dst alpha
-        // compares each 16 bit block to zeroes, yielding 0xFFFF or 0x0000--
-        // shifts out bottom 8 bits to get to 0x00FF or 0x0000.
-        dst_alpha = _mm256_cmpeq_epi16(dst_alpha, _mm256_setzero_si256());
-        dst_alpha = _mm256_srli_epi16(dst_alpha, 8);
-        src_alpha = _mm256_max_epu8(dst_alpha, src_alpha);
-
-        // figure out RGB
-        temp = _mm256_sub_epi16(shuff_src, shuff_dst);
-        temp = _mm256_mullo_epi16(temp, src_alpha);
-        temp = _mm256_add_epi16(temp, shuff_src);
-        shuff_dst = _mm256_slli_epi16(shuff_dst, 8);
-        shuff_dst = _mm256_add_epi16(shuff_dst, temp);
-        shuff_dst = _mm256_srli_epi16(shuff_dst, 8);
-
-        // blend together dstRGB and dstA
-        shuff_dst =
-            _mm256_blendv_epi8(shuff_dst, new_dst_alpha, combine_rgba_mask);))
+    RUN_AVX2_BLITTER(
+        RUN_16BIT_SHUFFLE_OUT(
+            src_alpha = _mm256_shuffle_epi8(shuff_src, shuff_out_alpha);
+
+            // src_alpha = src_alpha * module_alpha / 255
+            src_alpha = _mm256_mullo_epi16(src_alpha, modulate_alpha);
+            src_alpha = _mm256_srli_epi16(
+                _mm256_mulhi_epu16(src_alpha,
+                                   _mm256_set1_epi16((short)0x8081)),
+                7);
+
+            dst_alpha = _mm256_shuffle_epi8(shuff_dst, shuff_out_alpha);
+            // if the destination is opaque, it takes the max of each alpha
+            // with 255 otherwise it takes with the max with 0. This is
+            // equivalent to if opaque: alpha = 255
+            dst_alpha = _mm256_max_epi16(dst_alpha,
+                                         _mm256_set1_epi16(dst_alpha_offset));
+
+            // figure out alpha
+            temp = _mm256_mullo_epi16(src_alpha, dst_alpha);
+            temp = _mm256_srli_epi16(
+                _mm256_mulhi_epu16(temp, _mm256_set1_epi16((short)0x8081)), 7);
+            new_dst_alpha = _mm256_sub_epi16(dst_alpha, temp);
+            new_dst_alpha = _mm256_add_epi16(src_alpha, new_dst_alpha);
+
+            // if preexisting dst alpha is 0, src alpha should be set to 255
+            // enforces that dest alpha 0 means "copy source RGB"
+            // happens after real src alpha values used to calculate dst alpha
+            // compares each 16 bit block to zeroes, yielding 0xFFFF or
+            // 0x0000-- shifts out bottom 8 bits to get to 0x00FF or 0x0000.
+            dst_alpha = _mm256_cmpeq_epi16(dst_alpha, _mm256_setzero_si256());
+            dst_alpha = _mm256_srli_epi16(dst_alpha, 8);
+            src_alpha = _mm256_max_epu8(dst_alpha, src_alpha);
+
+            // figure out RGB
+            temp = _mm256_sub_epi16(shuff_src, shuff_dst);
+            temp = _mm256_mullo_epi16(temp, src_alpha);
+            temp = _mm256_add_epi16(temp, shuff_src);
+            shuff_dst = _mm256_slli_epi16(shuff_dst, 8);
+            shuff_dst = _mm256_add_epi16(shuff_dst, temp);
+            shuff_dst = _mm256_srli_epi16(shuff_dst, 8);
+
+            // blend together dstRGB and dstA
+            shuff_dst = _mm256_blendv_epi8(shuff_dst, new_dst_alpha,
+                                           combine_rgba_mask);))
 }
 #else
 void