add test to verify that changes made to the PSW in-parallel-with a trap

instruction end up in the bPSW and not in the PSW.  (PR 16026).

sim/testsuite/d30v-elf/trap.S

@@ -0,0 +1,35 @@
+# verify that trap || cmp works
+	add  r8,r0,0x11223344         ;
+	add  r9,r0,0x11223344         ;
+
+	mvtsys bpsw,r0 || nop
+	mvtsys bpc,r0  || nop
+
+	add  r1,r0,0x97000555       ; for psw
+	mvtsys psw,r1 || nop
+	trap 0  || cmpeq f0,r8,r9,;
+
+	.long 0x0e000004, 0x00f00000
+
+	.section .eit_v, "a"
+	nop     || nop
+	nop     || nop
+	nop     || nop
+	nop     || nop
+
+# save the old bpsw, psw
+	mvfsys r4,bpsw || nop
+	mvfsys r5,psw || nop
+
+# load up what they should be
+	add r6,r0,0x97004555
+	add r7,r0,0x90000000
+
+# verify that they have the right values
+# return exit value in r2 -- 0 success, 47 failure
+	add r2,r0,47
+	cmpeq f0,r4,r6 || nop
+	cmpeq f1,r5,r7 || nop
+	add/tt r2,r0,r0 || nop
+
+	reit