From 7f234bad24e650a9e4373f8a1127637841a683ef Mon Sep 17 00:00:00 2001
From: jsteube <jens.steube@gmail.com>
Date: Tue, 1 Nov 2016 03:21:45 +0100
Subject: [PATCH] Optimize 0x01, 0x02 and 0x80 handling in inc_common.c even
 more

---
 OpenCL/inc_common.cl | 2508 +++++-------------------------------------
 1 file changed, 264 insertions(+), 2244 deletions(-)

diff --git a/OpenCL/inc_common.cl b/OpenCL/inc_common.cl
index ac11e9f0d..8358db65a 100644
--- a/OpenCL/inc_common.cl
+++ b/OpenCL/inc_common.cl
@@ -202,666 +202,66 @@ inline void undo_unicode (const u32x in1[4], const u32x in2[4], u32x out[4])
 
 inline void append_0x01_1x4 (u32x w0[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0]  = 0x01;
-      break;
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0100;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x010000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x01000000;
-      break;
-
-    case 4:
-      w0[1] = 0x01;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0100;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x010000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x01000000;
-      break;
-
-    case 8:
-      w0[2] = 0x01;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0100;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x010000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x01000000;
-      break;
-
-    case 12:
-      w0[3] = 0x01;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0100;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x010000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x01000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |=  (offset >= 12)                   ? tmp : 0;
 }
 
 inline void append_0x01_2x4 (u32x w0[4], u32x w1[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x01;
-      break;
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0100;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x010000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x01000000;
-      break;
-
-    case 4:
-      w0[1] = 0x01;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0100;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x010000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x01000000;
-      break;
-
-    case 8:
-      w0[2] = 0x01;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0100;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x010000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x01000000;
-      break;
-
-    case 12:
-      w0[3] = 0x01;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0100;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x010000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x01000000;
-      break;
-
-    case 16:
-      w1[0] = 0x01;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x0100;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x010000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x01000000;
-      break;
-
-    case 20:
-      w1[1] = 0x01;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x0100;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x010000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x01000000;
-      break;
-
-    case 24:
-      w1[2] = 0x01;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x0100;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x010000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x01000000;
-      break;
-
-    case 28:
-      w1[3] = 0x01;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x0100;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x010000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x01000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |=  (offset >= 28)                   ? tmp : 0;
 }
 
 inline void append_0x01_3x4 (u32x w0[4], u32x w1[4], u32x w2[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x01;
-      break;
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0100;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x010000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x01000000;
-      break;
-
-    case 4:
-      w0[1] = 0x01;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0100;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x010000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x01000000;
-      break;
-
-    case 8:
-      w0[2] = 0x01;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0100;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x010000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x01000000;
-      break;
-
-    case 12:
-      w0[3] = 0x01;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0100;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x010000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x01000000;
-      break;
-
-    case 16:
-      w1[0] = 0x01;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x0100;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x010000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x01000000;
-      break;
-
-    case 20:
-      w1[1] = 0x01;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x0100;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x010000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x01000000;
-      break;
-
-    case 24:
-      w1[2] = 0x01;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x0100;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x010000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x01000000;
-      break;
-
-    case 28:
-      w1[3] = 0x01;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x0100;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x010000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x01000000;
-      break;
-
-    case 32:
-      w2[0] = 0x01;
-      break;
-
-    case 33:
-      w2[0] = w2[0] | 0x0100;
-      break;
-
-    case 34:
-      w2[0] = w2[0] | 0x010000;
-      break;
-
-    case 35:
-      w2[0] = w2[0] | 0x01000000;
-      break;
-
-    case 36:
-      w2[1] = 0x01;
-      break;
-
-    case 37:
-      w2[1] = w2[1] | 0x0100;
-      break;
-
-    case 38:
-      w2[1] = w2[1] | 0x010000;
-      break;
-
-    case 39:
-      w2[1] = w2[1] | 0x01000000;
-      break;
-
-    case 40:
-      w2[2] = 0x01;
-      break;
-
-    case 41:
-      w2[2] = w2[2] | 0x0100;
-      break;
-
-    case 42:
-      w2[2] = w2[2] | 0x010000;
-      break;
-
-    case 43:
-      w2[2] = w2[2] | 0x01000000;
-      break;
-
-    case 44:
-      w2[3] = 0x01;
-      break;
-
-    case 45:
-      w2[3] = w2[3] | 0x0100;
-      break;
-
-    case 46:
-      w2[3] = w2[3] | 0x010000;
-      break;
-
-    case 47:
-      w2[3] = w2[3] | 0x01000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |=  (offset >= 44)                   ? tmp : 0;
 }
 
 inline void append_0x01_4x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x01;
-      break;
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0100;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x010000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x01000000;
-      break;
-
-    case 4:
-      w0[1] = 0x01;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0100;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x010000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x01000000;
-      break;
-
-    case 8:
-      w0[2] = 0x01;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0100;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x010000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x01000000;
-      break;
-
-    case 12:
-      w0[3] = 0x01;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0100;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x010000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x01000000;
-      break;
-
-    case 16:
-      w1[0] = 0x01;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x0100;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x010000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x01000000;
-      break;
-
-    case 20:
-      w1[1] = 0x01;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x0100;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x010000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x01000000;
-      break;
-
-    case 24:
-      w1[2] = 0x01;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x0100;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x010000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x01000000;
-      break;
-
-    case 28:
-      w1[3] = 0x01;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x0100;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x010000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x01000000;
-      break;
-
-    case 32:
-      w2[0] = 0x01;
-      break;
-
-    case 33:
-      w2[0] = w2[0] | 0x0100;
-      break;
-
-    case 34:
-      w2[0] = w2[0] | 0x010000;
-      break;
-
-    case 35:
-      w2[0] = w2[0] | 0x01000000;
-      break;
-
-    case 36:
-      w2[1] = 0x01;
-      break;
-
-    case 37:
-      w2[1] = w2[1] | 0x0100;
-      break;
-
-    case 38:
-      w2[1] = w2[1] | 0x010000;
-      break;
-
-    case 39:
-      w2[1] = w2[1] | 0x01000000;
-      break;
-
-    case 40:
-      w2[2] = 0x01;
-      break;
-
-    case 41:
-      w2[2] = w2[2] | 0x0100;
-      break;
-
-    case 42:
-      w2[2] = w2[2] | 0x010000;
-      break;
-
-    case 43:
-      w2[2] = w2[2] | 0x01000000;
-      break;
-
-    case 44:
-      w2[3] = 0x01;
-      break;
-
-    case 45:
-      w2[3] = w2[3] | 0x0100;
-      break;
-
-    case 46:
-      w2[3] = w2[3] | 0x010000;
-      break;
-
-    case 47:
-      w2[3] = w2[3] | 0x01000000;
-      break;
-
-    case 48:
-      w3[0] = 0x01;
-      break;
-
-    case 49:
-      w3[0] = w3[0] | 0x0100;
-      break;
-
-    case 50:
-      w3[0] = w3[0] | 0x010000;
-      break;
-
-    case 51:
-      w3[0] = w3[0] | 0x01000000;
-      break;
-
-    case 52:
-      w3[1] = 0x01;
-      break;
-
-    case 53:
-      w3[1] = w3[1] | 0x0100;
-      break;
-
-    case 54:
-      w3[1] = w3[1] | 0x010000;
-      break;
-
-    case 55:
-      w3[1] = w3[1] | 0x01000000;
-      break;
-
-    case 56:
-      w3[2] = 0x01;
-      break;
-
-    case 57:
-      w3[2] = w3[2] | 0x0100;
-      break;
-
-    case 58:
-      w3[2] = w3[2] | 0x010000;
-      break;
-
-    case 59:
-      w3[2] = w3[2] | 0x01000000;
-      break;
-
-    case 60:
-      w3[3] = 0x01;
-      break;
-
-    case 61:
-      w3[3] = w3[3] | 0x0100;
-      break;
-
-    case 62:
-      w3[3] = w3[3] | 0x010000;
-      break;
-
-    case 63:
-      w3[3] = w3[3] | 0x01000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |= ((offset >= 44) && (offset < 48)) ? tmp : 0;
+  w3[0] |= ((offset >= 48) && (offset < 52)) ? tmp : 0;
+  w3[1] |= ((offset >= 52) && (offset < 56)) ? tmp : 0;
+  w3[2] |= ((offset >= 56) && (offset < 60)) ? tmp : 0;
+  w3[3] |=  (offset >= 60)                   ? tmp : 0;
 }
 
 inline void append_0x01_8x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], u32x w4[4], u32x w5[4], u32x w6[4], u32x w7[4], const u32 offset)
@@ -1384,666 +784,66 @@ inline void append_0x01_8x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], u32
 
 inline void append_0x02_1x4 (u32x w0[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0]  = 0x02;
-      break;
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0200;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x020000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x02000000;
-      break;
-
-    case 4:
-      w0[1] = 0x02;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0200;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x020000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x02000000;
-      break;
-
-    case 8:
-      w0[2] = 0x02;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0200;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x020000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x02000000;
-      break;
-
-    case 12:
-      w0[3] = 0x02;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0200;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x020000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x02000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |=  (offset >= 12)                   ? tmp : 0;
 }
 
 inline void append_0x02_2x4 (u32x w0[4], u32x w1[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x02;
-      break;
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0200;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x020000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x02000000;
-      break;
-
-    case 4:
-      w0[1] = 0x02;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0200;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x020000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x02000000;
-      break;
-
-    case 8:
-      w0[2] = 0x02;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0200;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x020000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x02000000;
-      break;
-
-    case 12:
-      w0[3] = 0x02;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0200;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x020000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x02000000;
-      break;
-
-    case 16:
-      w1[0] = 0x02;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x0200;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x020000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x02000000;
-      break;
-
-    case 20:
-      w1[1] = 0x02;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x0200;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x020000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x02000000;
-      break;
-
-    case 24:
-      w1[2] = 0x02;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x0200;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x020000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x02000000;
-      break;
-
-    case 28:
-      w1[3] = 0x02;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x0200;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x020000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x02000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |=  (offset >= 28)                   ? tmp : 0;
 }
 
 inline void append_0x02_3x4 (u32x w0[4], u32x w1[4], u32x w2[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x02;
-      break;
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0200;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x020000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x02000000;
-      break;
-
-    case 4:
-      w0[1] = 0x02;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0200;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x020000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x02000000;
-      break;
-
-    case 8:
-      w0[2] = 0x02;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0200;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x020000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x02000000;
-      break;
-
-    case 12:
-      w0[3] = 0x02;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0200;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x020000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x02000000;
-      break;
-
-    case 16:
-      w1[0] = 0x02;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x0200;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x020000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x02000000;
-      break;
-
-    case 20:
-      w1[1] = 0x02;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x0200;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x020000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x02000000;
-      break;
-
-    case 24:
-      w1[2] = 0x02;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x0200;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x020000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x02000000;
-      break;
-
-    case 28:
-      w1[3] = 0x02;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x0200;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x020000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x02000000;
-      break;
-
-    case 32:
-      w2[0] = 0x02;
-      break;
-
-    case 33:
-      w2[0] = w2[0] | 0x0200;
-      break;
-
-    case 34:
-      w2[0] = w2[0] | 0x020000;
-      break;
-
-    case 35:
-      w2[0] = w2[0] | 0x02000000;
-      break;
-
-    case 36:
-      w2[1] = 0x02;
-      break;
-
-    case 37:
-      w2[1] = w2[1] | 0x0200;
-      break;
-
-    case 38:
-      w2[1] = w2[1] | 0x020000;
-      break;
-
-    case 39:
-      w2[1] = w2[1] | 0x02000000;
-      break;
-
-    case 40:
-      w2[2] = 0x02;
-      break;
-
-    case 41:
-      w2[2] = w2[2] | 0x0200;
-      break;
-
-    case 42:
-      w2[2] = w2[2] | 0x020000;
-      break;
-
-    case 43:
-      w2[2] = w2[2] | 0x02000000;
-      break;
-
-    case 44:
-      w2[3] = 0x02;
-      break;
-
-    case 45:
-      w2[3] = w2[3] | 0x0200;
-      break;
-
-    case 46:
-      w2[3] = w2[3] | 0x020000;
-      break;
-
-    case 47:
-      w2[3] = w2[3] | 0x02000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |=  (offset >= 44)                   ? tmp : 0;
 }
 
 inline void append_0x02_4x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x02;
-      break;
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x0200;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x020000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x02000000;
-      break;
-
-    case 4:
-      w0[1] = 0x02;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x0200;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x020000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x02000000;
-      break;
-
-    case 8:
-      w0[2] = 0x02;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x0200;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x020000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x02000000;
-      break;
-
-    case 12:
-      w0[3] = 0x02;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x0200;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x020000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x02000000;
-      break;
-
-    case 16:
-      w1[0] = 0x02;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x0200;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x020000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x02000000;
-      break;
-
-    case 20:
-      w1[1] = 0x02;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x0200;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x020000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x02000000;
-      break;
-
-    case 24:
-      w1[2] = 0x02;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x0200;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x020000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x02000000;
-      break;
-
-    case 28:
-      w1[3] = 0x02;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x0200;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x020000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x02000000;
-      break;
-
-    case 32:
-      w2[0] = 0x02;
-      break;
-
-    case 33:
-      w2[0] = w2[0] | 0x0200;
-      break;
-
-    case 34:
-      w2[0] = w2[0] | 0x020000;
-      break;
-
-    case 35:
-      w2[0] = w2[0] | 0x02000000;
-      break;
-
-    case 36:
-      w2[1] = 0x02;
-      break;
-
-    case 37:
-      w2[1] = w2[1] | 0x0200;
-      break;
-
-    case 38:
-      w2[1] = w2[1] | 0x020000;
-      break;
-
-    case 39:
-      w2[1] = w2[1] | 0x02000000;
-      break;
-
-    case 40:
-      w2[2] = 0x02;
-      break;
-
-    case 41:
-      w2[2] = w2[2] | 0x0200;
-      break;
-
-    case 42:
-      w2[2] = w2[2] | 0x020000;
-      break;
-
-    case 43:
-      w2[2] = w2[2] | 0x02000000;
-      break;
-
-    case 44:
-      w2[3] = 0x02;
-      break;
-
-    case 45:
-      w2[3] = w2[3] | 0x0200;
-      break;
-
-    case 46:
-      w2[3] = w2[3] | 0x020000;
-      break;
-
-    case 47:
-      w2[3] = w2[3] | 0x02000000;
-      break;
-
-    case 48:
-      w3[0] = 0x02;
-      break;
-
-    case 49:
-      w3[0] = w3[0] | 0x0200;
-      break;
-
-    case 50:
-      w3[0] = w3[0] | 0x020000;
-      break;
-
-    case 51:
-      w3[0] = w3[0] | 0x02000000;
-      break;
-
-    case 52:
-      w3[1] = 0x02;
-      break;
-
-    case 53:
-      w3[1] = w3[1] | 0x0200;
-      break;
-
-    case 54:
-      w3[1] = w3[1] | 0x020000;
-      break;
-
-    case 55:
-      w3[1] = w3[1] | 0x02000000;
-      break;
-
-    case 56:
-      w3[2] = 0x02;
-      break;
-
-    case 57:
-      w3[2] = w3[2] | 0x0200;
-      break;
-
-    case 58:
-      w3[2] = w3[2] | 0x020000;
-      break;
-
-    case 59:
-      w3[2] = w3[2] | 0x02000000;
-      break;
-
-    case 60:
-      w3[3] = 0x02;
-      break;
-
-    case 61:
-      w3[3] = w3[3] | 0x0200;
-      break;
-
-    case 62:
-      w3[3] = w3[3] | 0x020000;
-      break;
-
-    case 63:
-      w3[3] = w3[3] | 0x02000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |= ((offset >= 44) && (offset < 48)) ? tmp : 0;
+  w3[0] |= ((offset >= 48) && (offset < 52)) ? tmp : 0;
+  w3[1] |= ((offset >= 52) && (offset < 56)) ? tmp : 0;
+  w3[2] |= ((offset >= 56) && (offset < 60)) ? tmp : 0;
+  w3[3] |=  (offset >= 60)                   ? tmp : 0;
 }
 
 inline void append_0x02_8x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], u32x w4[4], u32x w5[4], u32x w6[4], u32x w7[4], const u32 offset)
@@ -2566,666 +1366,66 @@ inline void append_0x02_8x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], u32
 
 inline void append_0x80_1x4 (u32x w0[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0]  = 0x80;
-      break;
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x8000;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x800000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x80000000;
-      break;
-
-    case 4:
-      w0[1] = 0x80;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x8000;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x800000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x80000000;
-      break;
-
-    case 8:
-      w0[2] = 0x80;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x8000;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x800000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x80000000;
-      break;
-
-    case 12:
-      w0[3] = 0x80;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x8000;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x800000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x80000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |=  (offset >= 12)                   ? tmp : 0;
 }
 
 inline void append_0x80_2x4 (u32x w0[4], u32x w1[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x80;
-      break;
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x8000;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x800000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x80000000;
-      break;
-
-    case 4:
-      w0[1] = 0x80;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x8000;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x800000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x80000000;
-      break;
-
-    case 8:
-      w0[2] = 0x80;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x8000;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x800000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x80000000;
-      break;
-
-    case 12:
-      w0[3] = 0x80;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x8000;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x800000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x80000000;
-      break;
-
-    case 16:
-      w1[0] = 0x80;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x8000;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x800000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x80000000;
-      break;
-
-    case 20:
-      w1[1] = 0x80;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x8000;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x800000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x80000000;
-      break;
-
-    case 24:
-      w1[2] = 0x80;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x8000;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x800000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x80000000;
-      break;
-
-    case 28:
-      w1[3] = 0x80;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x8000;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x800000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x80000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |=  (offset >= 28)                   ? tmp : 0;
 }
 
 inline void append_0x80_3x4 (u32x w0[4], u32x w1[4], u32x w2[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x80;
-      break;
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x8000;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x800000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x80000000;
-      break;
-
-    case 4:
-      w0[1] = 0x80;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x8000;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x800000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x80000000;
-      break;
-
-    case 8:
-      w0[2] = 0x80;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x8000;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x800000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x80000000;
-      break;
-
-    case 12:
-      w0[3] = 0x80;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x8000;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x800000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x80000000;
-      break;
-
-    case 16:
-      w1[0] = 0x80;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x8000;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x800000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x80000000;
-      break;
-
-    case 20:
-      w1[1] = 0x80;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x8000;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x800000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x80000000;
-      break;
-
-    case 24:
-      w1[2] = 0x80;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x8000;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x800000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x80000000;
-      break;
-
-    case 28:
-      w1[3] = 0x80;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x8000;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x800000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x80000000;
-      break;
-
-    case 32:
-      w2[0] = 0x80;
-      break;
-
-    case 33:
-      w2[0] = w2[0] | 0x8000;
-      break;
-
-    case 34:
-      w2[0] = w2[0] | 0x800000;
-      break;
-
-    case 35:
-      w2[0] = w2[0] | 0x80000000;
-      break;
-
-    case 36:
-      w2[1] = 0x80;
-      break;
-
-    case 37:
-      w2[1] = w2[1] | 0x8000;
-      break;
-
-    case 38:
-      w2[1] = w2[1] | 0x800000;
-      break;
-
-    case 39:
-      w2[1] = w2[1] | 0x80000000;
-      break;
-
-    case 40:
-      w2[2] = 0x80;
-      break;
-
-    case 41:
-      w2[2] = w2[2] | 0x8000;
-      break;
-
-    case 42:
-      w2[2] = w2[2] | 0x800000;
-      break;
-
-    case 43:
-      w2[2] = w2[2] | 0x80000000;
-      break;
-
-    case 44:
-      w2[3] = 0x80;
-      break;
-
-    case 45:
-      w2[3] = w2[3] | 0x8000;
-      break;
-
-    case 46:
-      w2[3] = w2[3] | 0x800000;
-      break;
-
-    case 47:
-      w2[3] = w2[3] | 0x80000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |=  (offset >= 44)                   ? tmp : 0;
 }
 
 inline void append_0x80_4x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], const u32 offset)
 {
-  switch (offset)
-  {
-    case 0:
-      w0[0] = 0x80;
-      break;
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-    case 1:
-      w0[0] = w0[0] | 0x8000;
-      break;
-
-    case 2:
-      w0[0] = w0[0] | 0x800000;
-      break;
-
-    case 3:
-      w0[0] = w0[0] | 0x80000000;
-      break;
-
-    case 4:
-      w0[1] = 0x80;
-      break;
-
-    case 5:
-      w0[1] = w0[1] | 0x8000;
-      break;
-
-    case 6:
-      w0[1] = w0[1] | 0x800000;
-      break;
-
-    case 7:
-      w0[1] = w0[1] | 0x80000000;
-      break;
-
-    case 8:
-      w0[2] = 0x80;
-      break;
-
-    case 9:
-      w0[2] = w0[2] | 0x8000;
-      break;
-
-    case 10:
-      w0[2] = w0[2] | 0x800000;
-      break;
-
-    case 11:
-      w0[2] = w0[2] | 0x80000000;
-      break;
-
-    case 12:
-      w0[3] = 0x80;
-      break;
-
-    case 13:
-      w0[3] = w0[3] | 0x8000;
-      break;
-
-    case 14:
-      w0[3] = w0[3] | 0x800000;
-      break;
-
-    case 15:
-      w0[3] = w0[3] | 0x80000000;
-      break;
-
-    case 16:
-      w1[0] = 0x80;
-      break;
-
-    case 17:
-      w1[0] = w1[0] | 0x8000;
-      break;
-
-    case 18:
-      w1[0] = w1[0] | 0x800000;
-      break;
-
-    case 19:
-      w1[0] = w1[0] | 0x80000000;
-      break;
-
-    case 20:
-      w1[1] = 0x80;
-      break;
-
-    case 21:
-      w1[1] = w1[1] | 0x8000;
-      break;
-
-    case 22:
-      w1[1] = w1[1] | 0x800000;
-      break;
-
-    case 23:
-      w1[1] = w1[1] | 0x80000000;
-      break;
-
-    case 24:
-      w1[2] = 0x80;
-      break;
-
-    case 25:
-      w1[2] = w1[2] | 0x8000;
-      break;
-
-    case 26:
-      w1[2] = w1[2] | 0x800000;
-      break;
-
-    case 27:
-      w1[2] = w1[2] | 0x80000000;
-      break;
-
-    case 28:
-      w1[3] = 0x80;
-      break;
-
-    case 29:
-      w1[3] = w1[3] | 0x8000;
-      break;
-
-    case 30:
-      w1[3] = w1[3] | 0x800000;
-      break;
-
-    case 31:
-      w1[3] = w1[3] | 0x80000000;
-      break;
-
-    case 32:
-      w2[0] = 0x80;
-      break;
-
-    case 33:
-      w2[0] = w2[0] | 0x8000;
-      break;
-
-    case 34:
-      w2[0] = w2[0] | 0x800000;
-      break;
-
-    case 35:
-      w2[0] = w2[0] | 0x80000000;
-      break;
-
-    case 36:
-      w2[1] = 0x80;
-      break;
-
-    case 37:
-      w2[1] = w2[1] | 0x8000;
-      break;
-
-    case 38:
-      w2[1] = w2[1] | 0x800000;
-      break;
-
-    case 39:
-      w2[1] = w2[1] | 0x80000000;
-      break;
-
-    case 40:
-      w2[2] = 0x80;
-      break;
-
-    case 41:
-      w2[2] = w2[2] | 0x8000;
-      break;
-
-    case 42:
-      w2[2] = w2[2] | 0x800000;
-      break;
-
-    case 43:
-      w2[2] = w2[2] | 0x80000000;
-      break;
-
-    case 44:
-      w2[3] = 0x80;
-      break;
-
-    case 45:
-      w2[3] = w2[3] | 0x8000;
-      break;
-
-    case 46:
-      w2[3] = w2[3] | 0x800000;
-      break;
-
-    case 47:
-      w2[3] = w2[3] | 0x80000000;
-      break;
-
-    case 48:
-      w3[0] = 0x80;
-      break;
-
-    case 49:
-      w3[0] = w3[0] | 0x8000;
-      break;
-
-    case 50:
-      w3[0] = w3[0] | 0x800000;
-      break;
-
-    case 51:
-      w3[0] = w3[0] | 0x80000000;
-      break;
-
-    case 52:
-      w3[1] = 0x80;
-      break;
-
-    case 53:
-      w3[1] = w3[1] | 0x8000;
-      break;
-
-    case 54:
-      w3[1] = w3[1] | 0x800000;
-      break;
-
-    case 55:
-      w3[1] = w3[1] | 0x80000000;
-      break;
-
-    case 56:
-      w3[2] = 0x80;
-      break;
-
-    case 57:
-      w3[2] = w3[2] | 0x8000;
-      break;
-
-    case 58:
-      w3[2] = w3[2] | 0x800000;
-      break;
-
-    case 59:
-      w3[2] = w3[2] | 0x80000000;
-      break;
-
-    case 60:
-      w3[3] = 0x80;
-      break;
-
-    case 61:
-      w3[3] = w3[3] | 0x8000;
-      break;
-
-    case 62:
-      w3[3] = w3[3] | 0x800000;
-      break;
-
-    case 63:
-      w3[3] = w3[3] | 0x80000000;
-      break;
-  }
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |= ((offset >= 44) && (offset < 48)) ? tmp : 0;
+  w3[0] |= ((offset >= 48) && (offset < 52)) ? tmp : 0;
+  w3[1] |= ((offset >= 52) && (offset < 56)) ? tmp : 0;
+  w3[2] |= ((offset >= 56) && (offset < 60)) ? tmp : 0;
+  w3[3] |=  (offset >= 60)                   ? tmp : 0;
 }
 
 inline void append_0x80_8x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4], u32x w4[4], u32x w5[4], u32x w6[4], u32x w7[4], const u32 offset)
@@ -6069,374 +4269,194 @@ inline void overwrite_at_be_4x4 (u32x w0[4], u32x w1[4], u32x w2[4], u32x w3[4],
 
 inline void append_0x01_1x4_S (u32 w0[4], const u32 offset)
 {
-  u32 w[4];
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-  w[0] = w0[0];
-  w[1] = w0[1];
-  w[2] = w0[2];
-  w[3] = w0[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x01;
-
-  w0[0] = w[0];
-  w0[1] = w[1];
-  w0[2] = w[2];
-  w0[3] = w[3];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |=  (offset >= 12)                   ? tmp : 0;
 }
 
 inline void append_0x01_2x4_S (u32 w0[4], u32 w1[4], const u32 offset)
 {
-  u32 w[8];
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-  w[0] = w0[0];
-  w[1] = w0[1];
-  w[2] = w0[2];
-  w[3] = w0[3];
-  w[4] = w1[0];
-  w[5] = w1[1];
-  w[6] = w1[2];
-  w[7] = w1[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x01;
-
-  w0[0] = w[0];
-  w0[1] = w[1];
-  w0[2] = w[2];
-  w0[3] = w[3];
-  w1[0] = w[4];
-  w1[1] = w[5];
-  w1[2] = w[6];
-  w1[3] = w[7];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |=  (offset >= 28)                   ? tmp : 0;
 }
 
 inline void append_0x01_3x4_S (u32 w0[4], u32 w1[4], u32 w2[4], const u32 offset)
 {
-  u32 w[12];
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-  w[ 0] = w0[0];
-  w[ 1] = w0[1];
-  w[ 2] = w0[2];
-  w[ 3] = w0[3];
-  w[ 4] = w1[0];
-  w[ 5] = w1[1];
-  w[ 6] = w1[2];
-  w[ 7] = w1[3];
-  w[ 8] = w2[0];
-  w[ 9] = w2[1];
-  w[10] = w2[2];
-  w[11] = w2[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x01;
-
-  w0[0] = w[ 0];
-  w0[1] = w[ 1];
-  w0[2] = w[ 2];
-  w0[3] = w[ 3];
-  w1[0] = w[ 4];
-  w1[1] = w[ 5];
-  w1[2] = w[ 6];
-  w1[3] = w[ 7];
-  w2[0] = w[ 8];
-  w2[1] = w[ 9];
-  w2[2] = w[10];
-  w2[3] = w[11];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |=  (offset >= 44)                   ? tmp : 0;
 }
 
 inline void append_0x01_4x4_S (u32 w0[4], u32 w1[4], u32 w2[4], u32 w3[4], const u32 offset)
 {
-  u32 w[16];
+  const u32 tmp = 0x01 << ((offset & 3) * 8);
 
-  w[ 0] = w0[0];
-  w[ 1] = w0[1];
-  w[ 2] = w0[2];
-  w[ 3] = w0[3];
-  w[ 4] = w1[0];
-  w[ 5] = w1[1];
-  w[ 6] = w1[2];
-  w[ 7] = w1[3];
-  w[ 8] = w2[0];
-  w[ 9] = w2[1];
-  w[10] = w2[2];
-  w[11] = w2[3];
-  w[12] = w3[0];
-  w[13] = w3[1];
-  w[14] = w3[2];
-  w[15] = w3[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x01;
-
-  w0[0] = w[ 0];
-  w0[1] = w[ 1];
-  w0[2] = w[ 2];
-  w0[3] = w[ 3];
-  w1[0] = w[ 4];
-  w1[1] = w[ 5];
-  w1[2] = w[ 6];
-  w1[3] = w[ 7];
-  w2[0] = w[ 8];
-  w2[1] = w[ 9];
-  w2[2] = w[10];
-  w2[3] = w[11];
-  w3[0] = w[12];
-  w3[1] = w[13];
-  w3[2] = w[14];
-  w3[3] = w[15];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |= ((offset >= 44) && (offset < 48)) ? tmp : 0;
+  w3[0] |= ((offset >= 48) && (offset < 52)) ? tmp : 0;
+  w3[1] |= ((offset >= 52) && (offset < 56)) ? tmp : 0;
+  w3[2] |= ((offset >= 56) && (offset < 60)) ? tmp : 0;
+  w3[3] |=  (offset >= 60)                   ? tmp : 0;
 }
 
 inline void append_0x02_1x4_S (u32 w0[4], const u32 offset)
 {
-  u32 w[4];
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-  w[0] = w0[0];
-  w[1] = w0[1];
-  w[2] = w0[2];
-  w[3] = w0[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x02;
-
-  w0[0] = w[0];
-  w0[1] = w[1];
-  w0[2] = w[2];
-  w0[3] = w[3];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |=  (offset >= 12)                   ? tmp : 0;
 }
 
 inline void append_0x02_2x4_S (u32 w0[4], u32 w1[4], const u32 offset)
 {
-  u32 w[8];
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-  w[0] = w0[0];
-  w[1] = w0[1];
-  w[2] = w0[2];
-  w[3] = w0[3];
-  w[4] = w1[0];
-  w[5] = w1[1];
-  w[6] = w1[2];
-  w[7] = w1[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x02;
-
-  w0[0] = w[0];
-  w0[1] = w[1];
-  w0[2] = w[2];
-  w0[3] = w[3];
-  w1[0] = w[4];
-  w1[1] = w[5];
-  w1[2] = w[6];
-  w1[3] = w[7];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |=  (offset >= 28)                   ? tmp : 0;
 }
 
 inline void append_0x02_3x4_S (u32 w0[4], u32 w1[4], u32 w2[4], const u32 offset)
 {
-  u32 w[12];
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-  w[ 0] = w0[0];
-  w[ 1] = w0[1];
-  w[ 2] = w0[2];
-  w[ 3] = w0[3];
-  w[ 4] = w1[0];
-  w[ 5] = w1[1];
-  w[ 6] = w1[2];
-  w[ 7] = w1[3];
-  w[ 8] = w2[0];
-  w[ 9] = w2[1];
-  w[10] = w2[2];
-  w[11] = w2[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x02;
-
-  w0[0] = w[ 0];
-  w0[1] = w[ 1];
-  w0[2] = w[ 2];
-  w0[3] = w[ 3];
-  w1[0] = w[ 4];
-  w1[1] = w[ 5];
-  w1[2] = w[ 6];
-  w1[3] = w[ 7];
-  w2[0] = w[ 8];
-  w2[1] = w[ 9];
-  w2[2] = w[10];
-  w2[3] = w[11];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |=  (offset >= 44)                   ? tmp : 0;
 }
 
 inline void append_0x02_4x4_S (u32 w0[4], u32 w1[4], u32 w2[4], u32 w3[4], const u32 offset)
 {
-  u32 w[16];
+  const u32 tmp = 0x02 << ((offset & 3) * 8);
 
-  w[ 0] = w0[0];
-  w[ 1] = w0[1];
-  w[ 2] = w0[2];
-  w[ 3] = w0[3];
-  w[ 4] = w1[0];
-  w[ 5] = w1[1];
-  w[ 6] = w1[2];
-  w[ 7] = w1[3];
-  w[ 8] = w2[0];
-  w[ 9] = w2[1];
-  w[10] = w2[2];
-  w[11] = w2[3];
-  w[12] = w3[0];
-  w[13] = w3[1];
-  w[14] = w3[2];
-  w[15] = w3[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x02;
-
-  w0[0] = w[ 0];
-  w0[1] = w[ 1];
-  w0[2] = w[ 2];
-  w0[3] = w[ 3];
-  w1[0] = w[ 4];
-  w1[1] = w[ 5];
-  w1[2] = w[ 6];
-  w1[3] = w[ 7];
-  w2[0] = w[ 8];
-  w2[1] = w[ 9];
-  w2[2] = w[10];
-  w2[3] = w[11];
-  w3[0] = w[12];
-  w3[1] = w[13];
-  w3[2] = w[14];
-  w3[3] = w[15];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |= ((offset >= 44) && (offset < 48)) ? tmp : 0;
+  w3[0] |= ((offset >= 48) && (offset < 52)) ? tmp : 0;
+  w3[1] |= ((offset >= 52) && (offset < 56)) ? tmp : 0;
+  w3[2] |= ((offset >= 56) && (offset < 60)) ? tmp : 0;
+  w3[3] |=  (offset >= 60)                   ? tmp : 0;
 }
 
 inline void append_0x80_1x4_S (u32 w0[4], const u32 offset)
 {
-  u32 w[4];
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-  w[0] = w0[0];
-  w[1] = w0[1];
-  w[2] = w0[2];
-  w[3] = w0[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x80;
-
-  w0[0] = w[0];
-  w0[1] = w[1];
-  w0[2] = w[2];
-  w0[3] = w[3];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |=  (offset >= 12)                   ? tmp : 0;
 }
 
 inline void append_0x80_2x4_S (u32 w0[4], u32 w1[4], const u32 offset)
 {
-  u32 w[8];
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-  w[0] = w0[0];
-  w[1] = w0[1];
-  w[2] = w0[2];
-  w[3] = w0[3];
-  w[4] = w1[0];
-  w[5] = w1[1];
-  w[6] = w1[2];
-  w[7] = w1[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x80;
-
-  w0[0] = w[0];
-  w0[1] = w[1];
-  w0[2] = w[2];
-  w0[3] = w[3];
-  w1[0] = w[4];
-  w1[1] = w[5];
-  w1[2] = w[6];
-  w1[3] = w[7];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |=  (offset >= 28)                   ? tmp : 0;
 }
 
 inline void append_0x80_3x4_S (u32 w0[4], u32 w1[4], u32 w2[4], const u32 offset)
 {
-  u32 w[12];
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-  w[ 0] = w0[0];
-  w[ 1] = w0[1];
-  w[ 2] = w0[2];
-  w[ 3] = w0[3];
-  w[ 4] = w1[0];
-  w[ 5] = w1[1];
-  w[ 6] = w1[2];
-  w[ 7] = w1[3];
-  w[ 8] = w2[0];
-  w[ 9] = w2[1];
-  w[10] = w2[2];
-  w[11] = w2[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x80;
-
-  w0[0] = w[ 0];
-  w0[1] = w[ 1];
-  w0[2] = w[ 2];
-  w0[3] = w[ 3];
-  w1[0] = w[ 4];
-  w1[1] = w[ 5];
-  w1[2] = w[ 6];
-  w1[3] = w[ 7];
-  w2[0] = w[ 8];
-  w2[1] = w[ 9];
-  w2[2] = w[10];
-  w2[3] = w[11];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |=  (offset >= 44)                   ? tmp : 0;
 }
 
 inline void append_0x80_4x4_S (u32 w0[4], u32 w1[4], u32 w2[4], u32 w3[4], const u32 offset)
 {
-  u32 w[16];
+  const u32 tmp = 0x80 << ((offset & 3) * 8);
 
-  w[ 0] = w0[0];
-  w[ 1] = w0[1];
-  w[ 2] = w0[2];
-  w[ 3] = w0[3];
-  w[ 4] = w1[0];
-  w[ 5] = w1[1];
-  w[ 6] = w1[2];
-  w[ 7] = w1[3];
-  w[ 8] = w2[0];
-  w[ 9] = w2[1];
-  w[10] = w2[2];
-  w[11] = w2[3];
-  w[12] = w3[0];
-  w[13] = w3[1];
-  w[14] = w3[2];
-  w[15] = w3[3];
-
-  u8 *w_ptr = (u8 *) w;
-
-  w_ptr[offset] = 0x80;
-
-  w0[0] = w[ 0];
-  w0[1] = w[ 1];
-  w0[2] = w[ 2];
-  w0[3] = w[ 3];
-  w1[0] = w[ 4];
-  w1[1] = w[ 5];
-  w1[2] = w[ 6];
-  w1[3] = w[ 7];
-  w2[0] = w[ 8];
-  w2[1] = w[ 9];
-  w2[2] = w[10];
-  w2[3] = w[11];
-  w3[0] = w[12];
-  w3[1] = w[13];
-  w3[2] = w[14];
-  w3[3] = w[15];
+  w0[0] |=                    (offset <  4)  ? tmp : 0;
+  w0[1] |= ((offset >=  4) && (offset <  8)) ? tmp : 0;
+  w0[2] |= ((offset >=  8) && (offset < 12)) ? tmp : 0;
+  w0[3] |= ((offset >= 12) && (offset < 16)) ? tmp : 0;
+  w1[0] |= ((offset >= 16) && (offset < 20)) ? tmp : 0;
+  w1[1] |= ((offset >= 20) && (offset < 24)) ? tmp : 0;
+  w1[2] |= ((offset >= 24) && (offset < 28)) ? tmp : 0;
+  w1[3] |= ((offset >= 28) && (offset < 32)) ? tmp : 0;
+  w2[0] |= ((offset >= 32) && (offset < 36)) ? tmp : 0;
+  w2[1] |= ((offset >= 36) && (offset < 40)) ? tmp : 0;
+  w2[2] |= ((offset >= 40) && (offset < 44)) ? tmp : 0;
+  w2[3] |= ((offset >= 44) && (offset < 48)) ? tmp : 0;
+  w3[0] |= ((offset >= 48) && (offset < 52)) ? tmp : 0;
+  w3[1] |= ((offset >= 52) && (offset < 56)) ? tmp : 0;
+  w3[2] |= ((offset >= 56) && (offset < 60)) ? tmp : 0;
+  w3[3] |=  (offset >= 60)                   ? tmp : 0;
 }
 
 inline void truncate_block_S (u32 w[4], const u32 len)