diff --git a/fail_db.txt b/fail_db.txt
index 97649624..3a1f915d 100644
--- a/fail_db.txt
+++ b/fail_db.txt
@@ -260,8 +260,6 @@
 ./tests/atomics-6.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/atomics-uniform-8.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/atomics-uniform-9.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
-./tests/paddus_vi16.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
-./tests/paddus_vi8.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/pmuls_i64.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/pmulus_i16.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/pmulus_i32.ispc compfail  x86-64      generic-4   Linux LLVM 3.5 clang++3.4 -O2 *
@@ -273,8 +271,6 @@
 ./tests/atomics-6.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/atomics-uniform-8.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/atomics-uniform-9.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
-./tests/paddus_vi16.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
-./tests/paddus_vi8.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/pmuls_i64.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/pmulus_i16.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
 ./tests/pmulus_i32.ispc compfail  x86-64     generic-16   Linux LLVM 3.5 clang++3.4 -O2 *
@@ -482,8 +478,6 @@
 ./tests/atomics-6.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/atomics-uniform-8.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/atomics-uniform-9.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
-./tests/paddus_vi16.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
-./tests/paddus_vi8.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/pmuls_i64.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/pmulus_i16.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/pmulus_i32.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
@@ -495,8 +489,6 @@
 ./tests/atomics-6.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/atomics-uniform-8.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/atomics-uniform-9.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
-./tests/paddus_vi16.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
-./tests/paddus_vi8.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/pmuls_i64.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/pmulus_i16.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/pmulus_i32.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
@@ -507,10 +499,6 @@
 ./tests/atomics-uniform-9.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O0 *
 ./tests/psubus_vi16.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc13.1 -O2 *
 ./tests/psubus_vi8.ispc compfail  x86-64            knc   Linux LLVM 3.6   icpc13.1 -O2 *
-./tests/psubus_vi16.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
-./tests/psubus_vi8.ispc compfail  x86-64      generic-4   Linux LLVM 3.6 clang++3.4 -O2 *
-./tests/psubus_vi16.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
-./tests/psubus_vi8.ispc compfail  x86-64     generic-16   Linux LLVM 3.6 clang++3.4 -O2 *
 ./tests/acos.ispc runfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
 ./tests/asin.ispc runfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *
 ./tests/gather-int8-2.ispc runfail  x86-64            knc   Linux LLVM 3.4   icpc15.0 -O2 *