Started optimizing some of the OpenCL kernel for latest AMD Catalyst 15.12:

- Replaced SBOX for DES:

replaced JtR's * Bitslice DES S-boxes making use of a vector conditional select operation (e.g., vsel on PowerPC with AltiVec).
with     JtR's * Bitslice DES S-boxes for x86 with MMX/SSE2/AVX and for typical RISC architectures.

Performance increased for DEScrypt from 355MH/s to 405MH/s and for LM from 11100MH/s to 12000MH/s

BTW, the same effect can be seen with non-maxwell GPU's

- Remove some volatile keywords no longer needed thanks to fixed catalyst bugs

- Fix weak-hash-check parameter for use with tools/test.sh

OpenCL/m05500_a0.cl

@@ -673,8 +673,8 @@ __kernel void __attribute__((reqd_work_group_size (64, 1, 1))) m05500_m04 (__glo
      * DES2
      */
 
-    volatile const u32 bc = (b >> 24) | (c << 8);
-    volatile const u32 cd = (c >> 24) | (d << 8);
+    const u32 bc = (b >> 24) | (c << 8);
+    const u32 cd = (c >> 24) | (d << 8);
 
     transform_netntlmv1_key (bc, cd, key);
 

OpenCL/m05500_a1.cl

@@ -725,8 +725,8 @@ __kernel void __attribute__((reqd_work_group_size (64, 1, 1))) m05500_m04 (__glo
      * DES2
      */
 
-    volatile const u32 bc = (b >> 24) | (c << 8);
-    volatile const u32 cd = (c >> 24) | (d << 8);
+    const u32 bc = (b >> 24) | (c << 8);
+    const u32 cd = (c >> 24) | (d << 8);
 
     transform_netntlmv1_key (bc, cd, key);
 

OpenCL/m05500_a3.cl

@@ -602,8 +602,8 @@ static void m05500m (__local u32 s_SPtrans[8][64], __local u32 s_skb[8][64], u32
      * DES2
      */
 
-    volatile const u32 bc = (b >> 24) | (c << 8);
-    volatile const u32 cd = (c >> 24) | (d << 8);
+    const u32 bc = (b >> 24) | (c << 8);
+    const u32 cd = (c >> 24) | (d << 8);
 
     transform_netntlmv1_key (bc, cd, key);
 

docs/readme.txt

@@ -2,7 +2,7 @@ oclHashcat v2.10
 ================
 
 NV users require ForceWare 346.59 or later (recommended 358.09 or later)
-AMD users require Catalyst 14.9 or later (recommended 15.9 or later)
+AMD users require Catalyst 14.9 or later (recommended 15.12 or later)
 
 ##
 ## Features

src/oclHashcat.c

@@ -6089,7 +6089,7 @@ int main (int argc, char **argv)
 
   if (attack_mode != ATTACK_MODE_STRAIGHT)
   {
-    if (weak_hash_threshold != WEAK_HASH_THRESHOLD)
+    if ((weak_hash_threshold != WEAK_HASH_THRESHOLD) && (weak_hash_threshold != 0))
     {
       log_error ("ERROR: setting --weak-hash-threshold allowed only in straight-attack mode");