sim: bfin: drop RET[ENI] setup

Since these insns run in usermode, there should be no need to setup
RET[ENI] to safe values.  They won't be dereferenced, and any insn
that returns via them are valid only in supervisor mode.  Since this
is in the main exception code path, saving any insn at all is good
as it gets multiplied quickly (as in O(n^2) times).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/sim/testsuite/sim/bfin/ChangeLog b/sim/testsuite/sim/bfin/ChangeLog
index 03a9844..753affc 100644 (file)
--- a/sim/testsuite/sim/bfin/ChangeLog
+++ b/sim/testsuite/sim/bfin/ChangeLog
@@ -1,3 +1,7 @@
+2013-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+       * se_allopcodes.h: Do not clear RETN/RETE/RETI.
+
 2012-04-09  Robin Getz  <robin.getz@analog.com>
 
        * random_0017.S, random_0018.S, random_0025.S: New ASTAT shift tests.

diff --git a/sim/testsuite/sim/bfin/se_allopcodes.h b/sim/testsuite/sim/bfin/se_allopcodes.h
index 7ff8d2b..b49862a 100644 (file)
--- a/sim/testsuite/sim/bfin/se_allopcodes.h
+++ b/sim/testsuite/sim/bfin/se_allopcodes.h
@@ -158,9 +158,6 @@ _next_instruction:
        /* set up pointers to valid data (32Meg), to reduce address violations */
        reset_dags
        RETS = r0;
-       RETN = r0;
-       RETE = r0;
-       RETI = r0;
 
        RTX;