PPC: Enable unaligned access and clean up the use of UNALIGNED_ACCESSES

src/ppc/constants-ppc.h

Index: src/ppc/constants-ppc.h
diff --git a/src/ppc/constants-ppc.h b/src/ppc/constants-ppc.h
index 4c404ae911f162f7c94c095884744e4bae702a2e..32b7b80c49e06be331e5377e34399fe99045fee2 100644
--- a/src/ppc/constants-ppc.h
+++ b/src/ppc/constants-ppc.h
@@ -146,7 +146,7 @@ enum Opcode {
   LD = 58 << 26,       // Load Double Word
   EXT3 = 59 << 26,     // Extended code set 3
   STD = 62 << 26,      // Store Double Word (optionally with Update)
-  EXT4 = 63 << 26      // Extended code set 4
+  EXT4 = 63 << 26,     // Extended code set 4

[JaideepBajwa, 2016/08/15 21:06:52]

is that comma at the end a typo?

 };
 
 // Bits 10-1
@@ -241,6 +241,9 @@ enum OpcodeExt2 {
   POPCNTD = 506 << 1,  // Population Count Doubleword
 
   // Below represent bits 10-1  (any value >= 512)
+  LHBRX = 790 << 1,    // load half word reversed
+  LWBRX = 534 << 1,    // load word reversed
+  LDBRX = 532 << 1,    // load double word reversed

[JaideepBajwa, 2016/08/15 21:06:52]

add the above in order? to keep it consistent.

   LFSX = 535 << 1,    // load float-single w/ x-form
   SRWX = 536 << 1,    // Shift Right Word
   SRDX = 539 << 1,    // Shift Right Double Word