diff --git a/examples/intrinsics/knc.h b/examples/intrinsics/knc.h
index 2261470d..242b6e25 100644
--- a/examples/intrinsics/knc.h
+++ b/examples/intrinsics/knc.h
@@ -442,22 +442,20 @@ template <> FORCEINLINE __vec16_i1 __undef_i1<__vec16_i1>() {
 // int8
 ///////////////////////////////////////////////////////////////////////////
 
-/*
-
-   TODO
-
-*/
+template <class RetVecType> static RetVecType __setzero_i8();
+template <> FORCEINLINE __vec16_i8 __setzero_i8<__vec16_i8>() {
+      return __vec16_i8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+}
 
 
 ///////////////////////////////////////////////////////////////////////////
 // int16
 ///////////////////////////////////////////////////////////////////////////
 
-/*
-
-   TODO
-
-*/
+template <class RetVecType> static RetVecType __setzero_i16();
+template <> FORCEINLINE __vec16_i16 __setzero_i16<__vec16_i16>() {
+      return __vec16_i16(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+}
 
 ///////////////////////////////////////////////////////////////////////////
 // int32
diff --git a/fail_db.txt b/fail_db.txt
index 5c8bc48f..9b6b4ae1 100644
--- a/fail_db.txt
+++ b/fail_db.txt
@@ -642,7 +642,6 @@
 ./tests/scatter-int16-1.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
 ./tests/scatter-int16.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
 ./tests/scatter-int8-1.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
-./tests/scatter-int8.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
 ./tests/shift-2.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
 ./tests/shuffle-3.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
 ./tests/shuffle-4.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
@@ -839,7 +838,6 @@
 ./tests/scatter-int16-1.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O0 *
 ./tests/scatter-int16.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O0 *
 ./tests/scatter-int8-1.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O0 *
-./tests/scatter-int8.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O0 *
 ./tests/shift-1.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O0 *
 ./tests/shift-2.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O0 *
 ./tests/shift-3.ispc compfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O0 *
@@ -1017,7 +1015,6 @@
 ./tests/scatter-int16-1.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O2 *
 ./tests/scatter-int16.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O2 *
 ./tests/scatter-int8-1.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O2 *
-./tests/scatter-int8.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O2 *
 ./tests/shift-2.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O2 *
 ./tests/shuffle-3.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O2 *
 ./tests/shuffle-4.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O2 *
@@ -1217,7 +1214,6 @@
 ./tests/scatter-int16-1.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O0 *
 ./tests/scatter-int16.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O0 *
 ./tests/scatter-int8-1.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O0 *
-./tests/scatter-int8.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O0 *
 ./tests/shift-1.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O0 *
 ./tests/shift-2.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O0 *
 ./tests/shift-3.ispc compfail  x86-64            knc   Linux LLVM 3.5   icpc15.0 -O0 *
@@ -1395,7 +1391,6 @@
 ./tests/scatter-int16-1.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O2 *
 ./tests/scatter-int16.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O2 *
 ./tests/scatter-int8-1.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O2 *
-./tests/scatter-int8.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O2 *
 ./tests/shift-2.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O2 *
 ./tests/shuffle-3.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O2 *
 ./tests/shuffle-4.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O2 *
@@ -1595,7 +1590,6 @@
 ./tests/scatter-int16-1.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O0 *
 ./tests/scatter-int16.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O0 *
 ./tests/scatter-int8-1.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O0 *
-./tests/scatter-int8.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O0 *
 ./tests/shift-1.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O0 *
 ./tests/shift-2.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O0 *
 ./tests/shift-3.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc15.0 -O0 *