* config/tc-avr.c: Add specified_mcu variable for selected mcu.

	(enum options): add OPTION_RMW_ISA for -mrmw option.
	(struct option md_longopts): Add mrmw option.
	(md_show_usage): add -mrmw option description.
	(md_parse_option): Update isa details if -mrmw option specified.
	* doc/c-avr.texi: Add doc for new option -mrmw.
	* gas/avr/avr.exp: Run new tests.
	* gas/avr/rmw.d: Add test for additional ISA support.
	* gas/avr/rmw.s: Ditto.

3 files changed, 79 insertions, 0 deletions

diff --git a/gas/testsuite/gas/avr/avr.exp b/gas/testsuite/gas/avr/avr.exp
new file mode 100644
index 0000000..fc90f9f
--- /dev/null
+++ b/gas/testsuite/gas/avr/avr.exp
@@ -0,0 +1,24 @@
+# Copyright 2014
+# Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  
+
+#
+# Some AVR tests
+#
+
+if {[istarget avr-*-*]} {
+    run_dump_tests [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
+}
diff --git a/gas/testsuite/gas/avr/rmw.d b/gas/testsuite/gas/avr/rmw.d
new file mode 100644
index 0000000..48554e1
--- /dev/null
+++ b/gas/testsuite/gas/avr/rmw.d
@@ -0,0 +1,23 @@
+#name: AVR RMW instructions
+#as: -mmcu=avrxmega2 -mrmw
+#objdump: -dr --show-raw-insn
+#target: avr-*-*
+
+.*: +file format elf32-avr
+
+Disassembly of section .text:
+
+00000000 <main>:
+   0:	cf 93       	push	r28
+   2:	df 93       	push	r29
+   4:	cd b7       	in	r28, 0x3d	; 61
+   6:	de b7       	in	r29, 0x3e	; 62
+   8:	c4 92       	xch	Z, r12
+   a:	c5 92       	las	Z, r12
+   c:	c6 92       	lac	Z, r12
+   e:	c7 92       	lat	Z, r12
+  10:	80 e0       	ldi	r24, 0x00	; 0
+  12:	90 e0       	ldi	r25, 0x00	; 0
+  14:	df 91       	pop	r29
+  16:	cf 91       	pop	r28
+  18:	08 95       	ret
diff --git a/gas/testsuite/gas/avr/rmw.s b/gas/testsuite/gas/avr/rmw.s
new file mode 100644
index 0000000..fca39c9
--- /dev/null
+++ b/gas/testsuite/gas/avr/rmw.s
@@ -0,0 +1,32 @@
+	.file	"rmw.s"
+__SP_H__ = 0x3e
+__SP_L__ = 0x3d
+__SREG__ = 0x3f
+__CCP__ = 0x34
+__tmp_reg__ = 0
+__zero_reg__ = 1
+	.text
+.global	main
+	.type	main, @function
+main:
+	push r28
+	push r29
+	in r28,__SP_L__
+	in r29,__SP_H__
+/* prologue: function */
+/* frame size = 0 */
+/* stack size = 2 */
+.L__stack_usage = 2
+/* #APP */
+	xch Z, r12
+	las Z, r12
+	lac Z, r12
+	lat Z, r12
+/* #NOAPP */
+	ldi r24,0
+	ldi r25,0
+/* epilogue start */
+	pop r29
+	pop r28
+	ret
+	.size	main, .-main