Portable refactorings.

Separate quick from portable entrypoints.
Move architectural dependencies into arch.

Change-Id: I9adbc0a9782e2959fdc3308215f01e3107632b7c
diff --git a/compiler/utils/mips/assembler_mips.cc b/compiler/utils/mips/assembler_mips.cc
index 58815da..931d7ab 100644
--- a/compiler/utils/mips/assembler_mips.cc
+++ b/compiler/utils/mips/assembler_mips.cc
@@ -988,7 +988,7 @@
   // Don't care about preserving A0 as this call won't return
   __ Move(A0, scratch_.AsCoreRegister());
   // Set up call to Thread::Current()->pDeliverException
-  __ LoadFromOffset(kLoadWord, T9, S1, ENTRYPOINT_OFFSET(pDeliverException));
+  __ LoadFromOffset(kLoadWord, T9, S1, QUICK_ENTRYPOINT_OFFSET(pDeliverException));
   __ Jr(T9);
   // Call never returns
   __ Break();