Changeset 29

Timestamp:

08/04/07 22:31:39 (5 years ago)

Author:

mike

Message:

Attempted to optimize a loop

Files:

• trunk/block.c (modified) (4 diffs)

trunk/block.c

@@ -34 +34 @@
     __m128i bot_left, bot, bot_right;
 
-    __m128i temp;
-
     top_left = top = top_right = self = _mm_setzero_si128();
 
@@ -68 +66 @@
 
     for( i = 0; i < 128; i++ ) {
-        temp = _mm_setzero_si128();
 
         top_left = left; top = self; top_right = right;
@@ -101 +98 @@
         }
 
+        __m128i temp = _mm_setzero_si128();
+        for( j = 0; j < 8; j++ ) {
+            __m128i _top_left = unpack(top_left, j);
+            __m128i _top = unpack( top, j );
+            __m128i _top_right = unpack( top_right, j );
+            __m128i _left = unpack( left, j );
+            __m128i _right = unpack ( right, j );
+            __m128i _bot = unpack( bot, j );
+            __m128i _bot_left = unpack( bot_right, j );
+            __m128i _bot_right = unpack( bot_right, j );
 
-        for( j = 0; j < 8; j++ ) {
-            __m128i sum1 = _mm_add_epi8( unpack( top_left, j ), unpack( top, j ) ); 
-            __m128i sum2 = _mm_add_epi8( unpack( top_right, j ), unpack( right, j ) ); 
-            __m128i sum3 = _mm_add_epi8( unpack( left, j ), unpack( bot_left, j ) ); 
-            __m128i sum4 = _mm_add_epi8( unpack( bot, j ), unpack( bot_right, j ) ); 
+            __m128i sum1 = _mm_add_epi8( _top_left, _top ); 
+            __m128i sum2 = _mm_add_epi8( _top_right, _right ); 
+            __m128i sum3 = _mm_add_epi8( _left, _bot_left ); 
+            __m128i sum4 = _mm_add_epi8( _bot, _bot_right ); 
+
+            sum3 = _mm_add_epi8( sum3, sum4 );
 
             sum1 = _mm_add_epi8( sum1, sum2 );
-            sum3 = _mm_add_epi8( sum3, sum4 );
 
             sum3 = _mm_add_epi8( sum1, sum3 );
@@ -115 +122 @@
             sum1 = _mm_cmpeq_epi8( sum3, populate );
 
-            sum3 = _mm_add_epi8( unpack( self, j ), sum3 );
+            __m128i _self = unpack( self, j );
+            sum3 = _mm_add_epi8( _self, sum3 );
 
             sum3 = _mm_cmpeq_epi8( sum3, populate );
 
             sum3 = _mm_or_si128( sum1, sum3 );
+
 
             temp = _mm_or_si128( temp, pack( sum3, j ) );