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* Device specific ISA support in AVR
@ 2014-02-25 12:05 S, Pitchumani
  0 siblings, 0 replies; only message in thread
From: S, Pitchumani @ 2014-02-25 12:05 UTC (permalink / raw)
  To: avr-gcc-list, binutils

[-- Attachment #1: Type: text/plain, Size: 2557 bytes --]

Hi,

Few AVR Xmega devices have specific instruction support than the architecture
it belongs to. For example atxmega128b1 device has RMW instructions (XCH,LAC,
LAS and LAT) support, but not all avrxmega6 devices have.

Now, avr-gcc passes architecture name to assembler instead of device name. So,
RMW instructions are not recognized (illegal opcode error) by assembler.

To address this issue, we could add device specific ISA to device details 
in GCC. Driver can pass additional option based on specific ISA that a device
has. Assembler can add device specific ISA to architecture ISA based on the
option it receives.

I have attached patches for avr-gcc and avr-as to address this issue.

device-specific-isa-avr-gcc.patch:
* Device specific ISA information is added to device details. 
* avr-gcc passes -mrmw option to assembler if the selected device
has RMW instruction support.

device-specific-isa-avr-as.patch:
* Add option -mrmw.
* Add AVR_ISA_RMW to current architecture ISA if -mrmw option specified.

Please review the patches and comment.

Thanks,
Pitchumani

gcc/ChangeLog
2014-02-25  Pitchumani Sivanupandi  <pitchumani.s@atmel.com>

    * config/avr/avr-arch.h: Add avr_additional_isa enum to have device
    specific ISA information.
    (avr_mcu_t): Add additional_isa field for device specific ISA.
    * config/avr/avr-devices.c (avr_mcu_types): Update AVR_MCU macro to
    include additional isa field.
    * config/avr/avr-mcus.def: Update device details with corresponding
    additional isa info.
    * config/avr/driver-avr.c (avr_device_to_as): Pass -mrmw option to
    assembler if RMW isa supported by current device.
    * config/avr/genmultilib.awk: Update as device info structure changed.

gcc/testsuite/ChangeLog
2014-02-25 Pitchumani Sivanupandi  <pitchumani.s@atmel.com>

    * gcc.target/avr/additional-isa.c: New test.

gas/ChangeLog
2014-02-25 Pitchumani Sivanupandi <pitchumani.s@atmel.com>

    * 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/testsuite/ChangeLog
2014-02-25 Pitchumani Sivanupandi <pitchumani.s@atmel.com>

    * gas/avr/avr.exp: Run new tests.
    * gas/avr/rmw.d: Add test for additional ISA support.
    * gas/avr/rmw.s: Ditto.


[-- Attachment #2: device-specific-isa-avr-gcc.patch --]
[-- Type: application/octet-stream, Size: 57257 bytes --]

diff --git a/gcc/config/avr/avr-arch.h b/gcc/config/avr/avr-arch.h
index 6357e99..8932798 100644
--- a/gcc/config/avr/avr-arch.h
+++ b/gcc/config/avr/avr-arch.h
@@ -42,6 +42,12 @@ enum avr_arch
   ARCH_AVRXMEGA7
 };
 
+/* Additional ISA specific to few devices. */
+enum avr_additional_isa
+{
+  ADD_ISA_NONE,
+  ADD_RMW_ISA = 0x1     /* device has RMW instructions XCH,LAC,LAS,LAT */
+};
 
 /* Architecture-specific properties.  */
 
@@ -100,6 +106,9 @@ typedef struct
   /* Index in avr_arch_types[].  */
   enum avr_arch arch;
 
+  /* additional isa */
+  int additional_isa;
+
   /* Must lie outside user's namespace.  NULL == no macro.  */
   const char *const macro;
 
diff --git a/gcc/config/avr/avr-devices.c b/gcc/config/avr/avr-devices.c
index 177f196..4ce4af3 100644
--- a/gcc/config/avr/avr-devices.c
+++ b/gcc/config/avr/avr-devices.c
@@ -104,11 +104,11 @@ avr_texinfo[] =
 const avr_mcu_t
 avr_mcu_types[] =
 {
-#define AVR_MCU(NAME, ARCH, MACRO, SP8, ERR_SKIP, DATA_SEC, N_FLASH, LIBNAME)\
-  { NAME, ARCH, MACRO, SP8, ERR_SKIP, DATA_SEC, N_FLASH, LIBNAME },
+#define AVR_MCU(NAME, ARCH, ADD_ISA, MACRO, SP8, ERR_SKIP, DATA_SEC, N_FLASH, LIBNAME)\
+  { NAME, ARCH, ADD_ISA, MACRO, SP8, ERR_SKIP, DATA_SEC, N_FLASH, LIBNAME },
 #include "avr-mcus.def"
 #undef AVR_MCU
     /* End of list.  */
-  { NULL, ARCH_UNKNOWN, NULL, 0, 0, 0, 0, NULL }
+  { NULL, ARCH_UNKNOWN, ADD_ISA_NONE, NULL, 0, 0, 0, 0, NULL }
 };
 
diff --git a/gcc/config/avr/avr-mcus.def b/gcc/config/avr/avr-mcus.def
index affd9f3..0a2b82c 100644
--- a/gcc/config/avr/avr-mcus.def
+++ b/gcc/config/avr/avr-mcus.def
@@ -42,6 +42,8 @@
 
        ARCH         Specifies the multilib variant together with SHORT_SP
 
+       ADD_ISA      Specifies the additional ISA available
+
        MACRO        If NULL, this is a core and not a device.  If non-NULL,
                     supply respective built-in macro.
 
@@ -60,265 +62,265 @@
    "avr2" must be first for the "0" default to work as intended.  */
 
 /* Classic, <= 8K.  */
-AVR_MCU ("avr2",                 ARCH_AVR2, NULL,                        0, 1, 0x0060, 6, "s8515")
-AVR_MCU ("at90s2313",            ARCH_AVR2, "__AVR_AT90S2313__",         1, 0, 0x0060, 1, "s2313")
-AVR_MCU ("at90s2323",            ARCH_AVR2, "__AVR_AT90S2323__",         1, 0, 0x0060, 1, "s2323")
-AVR_MCU ("at90s2333",            ARCH_AVR2, "__AVR_AT90S2333__",         1, 0, 0x0060, 1, "s2333")
-AVR_MCU ("at90s2343",            ARCH_AVR2, "__AVR_AT90S2343__",         1, 0, 0x0060, 1, "s2343")
-AVR_MCU ("attiny22",             ARCH_AVR2, "__AVR_ATtiny22__",          1, 0, 0x0060, 1, "tn22")
-AVR_MCU ("attiny26",             ARCH_AVR2, "__AVR_ATtiny26__",          1, 0, 0x0060, 1, "tn26")
-AVR_MCU ("at90s4414",            ARCH_AVR2, "__AVR_AT90S4414__",         0, 0, 0x0060, 1, "s4414")
-AVR_MCU ("at90s4433",            ARCH_AVR2, "__AVR_AT90S4433__",         1, 0, 0x0060, 1, "s4433")
-AVR_MCU ("at90s4434",            ARCH_AVR2, "__AVR_AT90S4434__",         0, 0, 0x0060, 1, "s4434")
-AVR_MCU ("at90s8515",            ARCH_AVR2, "__AVR_AT90S8515__",         0, 1, 0x0060, 1, "s8515")
-AVR_MCU ("at90c8534",            ARCH_AVR2, "__AVR_AT90C8534__",         0, 0, 0x0060, 1, "c8534")
-AVR_MCU ("at90s8535",            ARCH_AVR2, "__AVR_AT90S8535__",         0, 0, 0x0060, 1, "s8535")
+AVR_MCU ("avr2",                 ARCH_AVR2, ADD_ISA_NONE, NULL,                        0, 1, 0x0060, 6, "s8515")
+AVR_MCU ("at90s2313",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S2313__",         1, 0, 0x0060, 1, "s2313")
+AVR_MCU ("at90s2323",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S2323__",         1, 0, 0x0060, 1, "s2323")
+AVR_MCU ("at90s2333",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S2333__",         1, 0, 0x0060, 1, "s2333")
+AVR_MCU ("at90s2343",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S2343__",         1, 0, 0x0060, 1, "s2343")
+AVR_MCU ("attiny22",             ARCH_AVR2, ADD_ISA_NONE, "__AVR_ATtiny22__",          1, 0, 0x0060, 1, "tn22")
+AVR_MCU ("attiny26",             ARCH_AVR2, ADD_ISA_NONE, "__AVR_ATtiny26__",          1, 0, 0x0060, 1, "tn26")
+AVR_MCU ("at90s4414",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S4414__",         0, 0, 0x0060, 1, "s4414")
+AVR_MCU ("at90s4433",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S4433__",         1, 0, 0x0060, 1, "s4433")
+AVR_MCU ("at90s4434",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S4434__",         0, 0, 0x0060, 1, "s4434")
+AVR_MCU ("at90s8515",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S8515__",         0, 1, 0x0060, 1, "s8515")
+AVR_MCU ("at90c8534",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90C8534__",         0, 0, 0x0060, 1, "c8534")
+AVR_MCU ("at90s8535",            ARCH_AVR2, ADD_ISA_NONE, "__AVR_AT90S8535__",         0, 0, 0x0060, 1, "s8535")
 /* Classic + MOVW, <= 8K.  */
-AVR_MCU ("avr25",                ARCH_AVR25, NULL,                       0, 0, 0x0060, 1, "tn85")
-AVR_MCU ("ata6289",              ARCH_AVR25, "__AVR_ATA6289__",          0, 0, 0x0100, 1, "a6289")
-AVR_MCU ("ata5272",              ARCH_AVR25, "__AVR_ATA5272__",          0, 0, 0x0100, 1, "a5272")
-AVR_MCU ("attiny13",             ARCH_AVR25, "__AVR_ATtiny13__",         1, 0, 0x0060, 1, "tn13")
-AVR_MCU ("attiny13a",            ARCH_AVR25, "__AVR_ATtiny13A__",        1, 0, 0x0060, 1, "tn13a")
-AVR_MCU ("attiny2313",           ARCH_AVR25, "__AVR_ATtiny2313__",       1, 0, 0x0060, 1, "tn2313")
-AVR_MCU ("attiny2313a",          ARCH_AVR25, "__AVR_ATtiny2313A__",      1, 0, 0x0060, 1, "tn2313a")
-AVR_MCU ("attiny24",             ARCH_AVR25, "__AVR_ATtiny24__",         1, 0, 0x0060, 1, "tn24")
-AVR_MCU ("attiny24a",            ARCH_AVR25, "__AVR_ATtiny24A__",        1, 0, 0x0060, 1, "tn24a")
-AVR_MCU ("attiny4313",           ARCH_AVR25, "__AVR_ATtiny4313__",       0, 0, 0x0060, 1, "tn4313")
-AVR_MCU ("attiny44",             ARCH_AVR25, "__AVR_ATtiny44__",         0, 0, 0x0060, 1, "tn44")
-AVR_MCU ("attiny44a",            ARCH_AVR25, "__AVR_ATtiny44A__",        0, 0, 0x0060, 1, "tn44a")
-AVR_MCU ("attiny84",             ARCH_AVR25, "__AVR_ATtiny84__",         0, 0, 0x0060, 1, "tn84")
-AVR_MCU ("attiny84a",            ARCH_AVR25, "__AVR_ATtiny84A__",        0, 0, 0x0060, 1, "tn84")
-AVR_MCU ("attiny25",             ARCH_AVR25, "__AVR_ATtiny25__",         1, 0, 0x0060, 1, "tn25")
-AVR_MCU ("attiny45",             ARCH_AVR25, "__AVR_ATtiny45__",         0, 0, 0x0060, 1, "tn45")
-AVR_MCU ("attiny85",             ARCH_AVR25, "__AVR_ATtiny85__",         0, 0, 0x0060, 1, "tn85")
-AVR_MCU ("attiny261",            ARCH_AVR25, "__AVR_ATtiny261__",        1, 0, 0x0060, 1, "tn261")
-AVR_MCU ("attiny261a",           ARCH_AVR25, "__AVR_ATtiny261A__",       1, 0, 0x0060, 1, "tn261a")
-AVR_MCU ("attiny461",            ARCH_AVR25, "__AVR_ATtiny461__",        0, 0, 0x0060, 1, "tn461")
-AVR_MCU ("attiny461a",           ARCH_AVR25, "__AVR_ATtiny461A__",       0, 0, 0x0060, 1, "tn461a")
-AVR_MCU ("attiny861",            ARCH_AVR25, "__AVR_ATtiny861__",        0, 0, 0x0060, 1, "tn861")
-AVR_MCU ("attiny861a",           ARCH_AVR25, "__AVR_ATtiny861A__",       0, 0, 0x0060, 1, "tn861a")
-AVR_MCU ("attiny43u",            ARCH_AVR25, "__AVR_ATtiny43U__",        0, 0, 0x0060, 1, "tn43u")
-AVR_MCU ("attiny87",             ARCH_AVR25, "__AVR_ATtiny87__",         0, 0, 0x0100, 1, "tn87")
-AVR_MCU ("attiny48",             ARCH_AVR25, "__AVR_ATtiny48__",         0, 0, 0x0100, 1, "tn48")
-AVR_MCU ("attiny88",             ARCH_AVR25, "__AVR_ATtiny88__",         0, 0, 0x0100, 1, "tn88")
-AVR_MCU ("at86rf401",            ARCH_AVR25, "__AVR_AT86RF401__",        0, 0, 0x0060, 1, "86401")
+AVR_MCU ("avr25",                ARCH_AVR25, ADD_ISA_NONE, NULL,                       0, 0, 0x0060, 1, "tn85")
+AVR_MCU ("ata6289",              ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATA6289__",          0, 0, 0x0100, 1, "a6289")
+AVR_MCU ("ata5272",              ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATA5272__",          0, 0, 0x0100, 1, "a5272")
+AVR_MCU ("attiny13",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny13__",         1, 0, 0x0060, 1, "tn13")
+AVR_MCU ("attiny13a",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny13A__",        1, 0, 0x0060, 1, "tn13a")
+AVR_MCU ("attiny2313",           ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny2313__",       1, 0, 0x0060, 1, "tn2313")
+AVR_MCU ("attiny2313a",          ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny2313A__",      1, 0, 0x0060, 1, "tn2313a")
+AVR_MCU ("attiny24",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny24__",         1, 0, 0x0060, 1, "tn24")
+AVR_MCU ("attiny24a",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny24A__",        1, 0, 0x0060, 1, "tn24a")
+AVR_MCU ("attiny4313",           ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny4313__",       0, 0, 0x0060, 1, "tn4313")
+AVR_MCU ("attiny44",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny44__",         0, 0, 0x0060, 1, "tn44")
+AVR_MCU ("attiny44a",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny44A__",        0, 0, 0x0060, 1, "tn44a")
+AVR_MCU ("attiny84",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny84__",         0, 0, 0x0060, 1, "tn84")
+AVR_MCU ("attiny84a",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny84A__",        0, 0, 0x0060, 1, "tn84")
+AVR_MCU ("attiny25",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny25__",         1, 0, 0x0060, 1, "tn25")
+AVR_MCU ("attiny45",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny45__",         0, 0, 0x0060, 1, "tn45")
+AVR_MCU ("attiny85",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny85__",         0, 0, 0x0060, 1, "tn85")
+AVR_MCU ("attiny261",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny261__",        1, 0, 0x0060, 1, "tn261")
+AVR_MCU ("attiny261a",           ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny261A__",       1, 0, 0x0060, 1, "tn261a")
+AVR_MCU ("attiny461",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny461__",        0, 0, 0x0060, 1, "tn461")
+AVR_MCU ("attiny461a",           ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny461A__",       0, 0, 0x0060, 1, "tn461a")
+AVR_MCU ("attiny861",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny861__",        0, 0, 0x0060, 1, "tn861")
+AVR_MCU ("attiny861a",           ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny861A__",       0, 0, 0x0060, 1, "tn861a")
+AVR_MCU ("attiny43u",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny43U__",        0, 0, 0x0060, 1, "tn43u")
+AVR_MCU ("attiny87",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny87__",         0, 0, 0x0100, 1, "tn87")
+AVR_MCU ("attiny48",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny48__",         0, 0, 0x0100, 1, "tn48")
+AVR_MCU ("attiny88",             ARCH_AVR25, ADD_ISA_NONE, "__AVR_ATtiny88__",         0, 0, 0x0100, 1, "tn88")
+AVR_MCU ("at86rf401",            ARCH_AVR25, ADD_ISA_NONE, "__AVR_AT86RF401__",        0, 0, 0x0060, 1, "86401")
 /* Classic, > 8K, <= 64K.  */
-AVR_MCU ("avr3",                 ARCH_AVR3, NULL,                        0, 0, 0x0060, 1, "43355")
-AVR_MCU ("at43usb355",           ARCH_AVR3, "__AVR_AT43USB355__",        0, 0, 0x0060, 1, "43355")
-AVR_MCU ("at76c711",             ARCH_AVR3, "__AVR_AT76C711__",          0, 0, 0x0060, 1, "76711")
+AVR_MCU ("avr3",                 ARCH_AVR3, ADD_ISA_NONE, NULL,                        0, 0, 0x0060, 1, "43355")
+AVR_MCU ("at43usb355",           ARCH_AVR3, ADD_ISA_NONE, "__AVR_AT43USB355__",        0, 0, 0x0060, 1, "43355")
+AVR_MCU ("at76c711",             ARCH_AVR3, ADD_ISA_NONE, "__AVR_AT76C711__",          0, 0, 0x0060, 1, "76711")
 /* Classic, == 128K.  */
-AVR_MCU ("avr31",                ARCH_AVR31, NULL,                       0, 1, 0x0060, 2, "m103")
-AVR_MCU ("atmega103",            ARCH_AVR31, "__AVR_ATmega103__",        0, 1, 0x0060, 2, "m103")
-AVR_MCU ("at43usb320",           ARCH_AVR31, "__AVR_AT43USB320__",       0, 0, 0x0060, 2, "43320")
+AVR_MCU ("avr31",                ARCH_AVR31, ADD_ISA_NONE, NULL,                       0, 1, 0x0060, 2, "m103")
+AVR_MCU ("atmega103",            ARCH_AVR31, ADD_ISA_NONE, "__AVR_ATmega103__",        0, 1, 0x0060, 2, "m103")
+AVR_MCU ("at43usb320",           ARCH_AVR31, ADD_ISA_NONE, "__AVR_AT43USB320__",       0, 0, 0x0060, 2, "43320")
 /* Classic + MOVW + JMP/CALL.  */
-AVR_MCU ("avr35",                ARCH_AVR35, NULL,                       0, 0, 0x0100, 1, "usb162")
-AVR_MCU ("ata5505",              ARCH_AVR35, "__AVR_ATA5505__",          0, 0, 0x0100, 1, "a5505")
-AVR_MCU ("at90usb82",            ARCH_AVR35, "__AVR_AT90USB82__",        0, 0, 0x0100, 1, "usb82")
-AVR_MCU ("at90usb162",           ARCH_AVR35, "__AVR_AT90USB162__",       0, 0, 0x0100, 1, "usb162")
-AVR_MCU ("atmega8u2",            ARCH_AVR35, "__AVR_ATmega8U2__",        0, 0, 0x0100, 1, "m8u2")
-AVR_MCU ("atmega16u2",           ARCH_AVR35, "__AVR_ATmega16U2__",       0, 0, 0x0100, 1, "m16u2")
-AVR_MCU ("atmega32u2",           ARCH_AVR35, "__AVR_ATmega32U2__",       0, 0, 0x0100, 1, "m32u2")
-AVR_MCU ("attiny167",            ARCH_AVR35, "__AVR_ATtiny167__",        0, 0, 0x0100, 1, "tn167")
-AVR_MCU ("attiny1634",           ARCH_AVR35, "__AVR_ATtiny1634__",       0, 0, 0x0100, 1, "tn1634")
+AVR_MCU ("avr35",                ARCH_AVR35, ADD_ISA_NONE, NULL,                       0, 0, 0x0100, 1, "usb162")
+AVR_MCU ("ata5505",              ARCH_AVR35, ADD_ISA_NONE, "__AVR_ATA5505__",          0, 0, 0x0100, 1, "a5505")
+AVR_MCU ("at90usb82",            ARCH_AVR35, ADD_ISA_NONE, "__AVR_AT90USB82__",        0, 0, 0x0100, 1, "usb82")
+AVR_MCU ("at90usb162",           ARCH_AVR35, ADD_ISA_NONE, "__AVR_AT90USB162__",       0, 0, 0x0100, 1, "usb162")
+AVR_MCU ("atmega8u2",            ARCH_AVR35, ADD_ISA_NONE, "__AVR_ATmega8U2__",        0, 0, 0x0100, 1, "m8u2")
+AVR_MCU ("atmega16u2",           ARCH_AVR35, ADD_ISA_NONE, "__AVR_ATmega16U2__",       0, 0, 0x0100, 1, "m16u2")
+AVR_MCU ("atmega32u2",           ARCH_AVR35, ADD_ISA_NONE, "__AVR_ATmega32U2__",       0, 0, 0x0100, 1, "m32u2")
+AVR_MCU ("attiny167",            ARCH_AVR35, ADD_ISA_NONE, "__AVR_ATtiny167__",        0, 0, 0x0100, 1, "tn167")
+AVR_MCU ("attiny1634",           ARCH_AVR35, ADD_ISA_NONE, "__AVR_ATtiny1634__",       0, 0, 0x0100, 1, "tn1634")
 /* Enhanced, <= 8K.  */
-AVR_MCU ("avr4",                 ARCH_AVR4, NULL,                        0, 0, 0x0060, 1, "m8")
-AVR_MCU ("ata6285",              ARCH_AVR4, "__AVR_ATA6285__",           0, 0, 0x0100, 1, "a6285")
-AVR_MCU ("ata6286",              ARCH_AVR4, "__AVR_ATA6286__",           0, 0, 0x0100, 1, "a6286")
-AVR_MCU ("atmega8",              ARCH_AVR4, "__AVR_ATmega8__",           0, 0, 0x0060, 1, "m8")
-AVR_MCU ("atmega8a",             ARCH_AVR4, "__AVR_ATmega8A__",          0, 0, 0x0060, 1, "m8a")
-AVR_MCU ("atmega48",             ARCH_AVR4, "__AVR_ATmega48__",          0, 0, 0x0100, 1, "m48")
-AVR_MCU ("atmega48a",            ARCH_AVR4, "__AVR_ATmega48A__",         0, 0, 0x0100, 1, "m48a")
-AVR_MCU ("atmega48p",            ARCH_AVR4, "__AVR_ATmega48P__",         0, 0, 0x0100, 1, "m48p")
-AVR_MCU ("atmega48pa",           ARCH_AVR4, "__AVR_ATmega48PA__",        0, 0, 0x0100, 1, "m48pa")
-AVR_MCU ("atmega88",             ARCH_AVR4, "__AVR_ATmega88__",          0, 0, 0x0100, 1, "m88")
-AVR_MCU ("atmega88a",            ARCH_AVR4, "__AVR_ATmega88A__",         0, 0, 0x0100, 1, "m88a")
-AVR_MCU ("atmega88p",            ARCH_AVR4, "__AVR_ATmega88P__",         0, 0, 0x0100, 1, "m88p")
-AVR_MCU ("atmega88pa",           ARCH_AVR4, "__AVR_ATmega88PA__",        0, 0, 0x0100, 1, "m88pa")
-AVR_MCU ("atmega8515",           ARCH_AVR4, "__AVR_ATmega8515__",        0, 0, 0x0060, 1, "m8515")
-AVR_MCU ("atmega8535",           ARCH_AVR4, "__AVR_ATmega8535__",        0, 0, 0x0060, 1, "m8535")
-AVR_MCU ("atmega8hva",           ARCH_AVR4, "__AVR_ATmega8HVA__",        0, 0, 0x0100, 1, "m8hva")
-AVR_MCU ("at90pwm1",             ARCH_AVR4, "__AVR_AT90PWM1__",          0, 0, 0x0100, 1, "90pwm1")
-AVR_MCU ("at90pwm2",             ARCH_AVR4, "__AVR_AT90PWM2__",          0, 0, 0x0100, 1, "90pwm2")
-AVR_MCU ("at90pwm2b",            ARCH_AVR4, "__AVR_AT90PWM2B__",         0, 0, 0x0100, 1, "90pwm2b")
-AVR_MCU ("at90pwm3",             ARCH_AVR4, "__AVR_AT90PWM3__",          0, 0, 0x0100, 1, "90pwm3")
-AVR_MCU ("at90pwm3b",            ARCH_AVR4, "__AVR_AT90PWM3B__",         0, 0, 0x0100, 1, "90pwm3b")
-AVR_MCU ("at90pwm81",            ARCH_AVR4, "__AVR_AT90PWM81__",         0, 0, 0x0100, 1, "90pwm81")
+AVR_MCU ("avr4",                 ARCH_AVR4, ADD_ISA_NONE, NULL,                        0, 0, 0x0060, 1, "m8")
+AVR_MCU ("ata6285",              ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATA6285__",           0, 0, 0x0100, 1, "a6285")
+AVR_MCU ("ata6286",              ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATA6286__",           0, 0, 0x0100, 1, "a6286")
+AVR_MCU ("atmega8",              ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega8__",           0, 0, 0x0060, 1, "m8")
+AVR_MCU ("atmega8a",             ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega8A__",          0, 0, 0x0060, 1, "m8a")
+AVR_MCU ("atmega48",             ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega48__",          0, 0, 0x0100, 1, "m48")
+AVR_MCU ("atmega48a",            ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega48A__",         0, 0, 0x0100, 1, "m48a")
+AVR_MCU ("atmega48p",            ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega48P__",         0, 0, 0x0100, 1, "m48p")
+AVR_MCU ("atmega48pa",           ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega48PA__",        0, 0, 0x0100, 1, "m48pa")
+AVR_MCU ("atmega88",             ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega88__",          0, 0, 0x0100, 1, "m88")
+AVR_MCU ("atmega88a",            ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega88A__",         0, 0, 0x0100, 1, "m88a")
+AVR_MCU ("atmega88p",            ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega88P__",         0, 0, 0x0100, 1, "m88p")
+AVR_MCU ("atmega88pa",           ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega88PA__",        0, 0, 0x0100, 1, "m88pa")
+AVR_MCU ("atmega8515",           ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega8515__",        0, 0, 0x0060, 1, "m8515")
+AVR_MCU ("atmega8535",           ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega8535__",        0, 0, 0x0060, 1, "m8535")
+AVR_MCU ("atmega8hva",           ARCH_AVR4, ADD_ISA_NONE, "__AVR_ATmega8HVA__",        0, 0, 0x0100, 1, "m8hva")
+AVR_MCU ("at90pwm1",             ARCH_AVR4, ADD_ISA_NONE, "__AVR_AT90PWM1__",          0, 0, 0x0100, 1, "90pwm1")
+AVR_MCU ("at90pwm2",             ARCH_AVR4, ADD_ISA_NONE, "__AVR_AT90PWM2__",          0, 0, 0x0100, 1, "90pwm2")
+AVR_MCU ("at90pwm2b",            ARCH_AVR4, ADD_ISA_NONE, "__AVR_AT90PWM2B__",         0, 0, 0x0100, 1, "90pwm2b")
+AVR_MCU ("at90pwm3",             ARCH_AVR4, ADD_ISA_NONE, "__AVR_AT90PWM3__",          0, 0, 0x0100, 1, "90pwm3")
+AVR_MCU ("at90pwm3b",            ARCH_AVR4, ADD_ISA_NONE, "__AVR_AT90PWM3B__",         0, 0, 0x0100, 1, "90pwm3b")
+AVR_MCU ("at90pwm81",            ARCH_AVR4, ADD_ISA_NONE, "__AVR_AT90PWM81__",         0, 0, 0x0100, 1, "90pwm81")
 /* Enhanced, > 8K, <= 64K.  */
-AVR_MCU ("avr5",                 ARCH_AVR5, NULL,                        0, 0, 0x0060, 1, "m16")
-AVR_MCU ("ata5790",              ARCH_AVR5, "__AVR_ATA5790__",           0, 0, 0x0100, 1, "a5790")
-AVR_MCU ("ata5790n",             ARCH_AVR5, "__AVR_ATA5790N__",          0, 0, 0x0100, 1, "a5790n")
-AVR_MCU ("ata5795",              ARCH_AVR5, "__AVR_ATA5795__",           0, 0, 0x0100, 1, "a5795")
-AVR_MCU ("atmega16",             ARCH_AVR5, "__AVR_ATmega16__",          0, 0, 0x0060, 1, "m16")
-AVR_MCU ("atmega16a",            ARCH_AVR5, "__AVR_ATmega16A__",         0, 0, 0x0060, 1, "m16a")
-AVR_MCU ("atmega161",            ARCH_AVR5, "__AVR_ATmega161__",         0, 0, 0x0060, 1, "m161")
-AVR_MCU ("atmega162",            ARCH_AVR5, "__AVR_ATmega162__",         0, 0, 0x0100, 1, "m162")
-AVR_MCU ("atmega163",            ARCH_AVR5, "__AVR_ATmega163__",         0, 0, 0x0060, 1, "m163")
-AVR_MCU ("atmega164a",           ARCH_AVR5, "__AVR_ATmega164A__",        0, 0, 0x0100, 1, "m164a")
-AVR_MCU ("atmega164p",           ARCH_AVR5, "__AVR_ATmega164P__",        0, 0, 0x0100, 1, "m164p")
-AVR_MCU ("atmega164pa",          ARCH_AVR5, "__AVR_ATmega164PA__",       0, 0, 0x0100, 1, "m164pa")
-AVR_MCU ("atmega165",            ARCH_AVR5, "__AVR_ATmega165__",         0, 0, 0x0100, 1, "m165")
-AVR_MCU ("atmega165a",           ARCH_AVR5, "__AVR_ATmega165A__",        0, 0, 0x0100, 1, "m165a")
-AVR_MCU ("atmega165p",           ARCH_AVR5, "__AVR_ATmega165P__",        0, 0, 0x0100, 1, "m165p")
-AVR_MCU ("atmega165pa",          ARCH_AVR5, "__AVR_ATmega165PA__",       0, 0, 0x0100, 1, "m165pa")
-AVR_MCU ("atmega168",            ARCH_AVR5, "__AVR_ATmega168__",         0, 0, 0x0100, 1, "m168")
-AVR_MCU ("atmega168a",           ARCH_AVR5, "__AVR_ATmega168A__",        0, 0, 0x0100, 1, "m168a")
-AVR_MCU ("atmega168p",           ARCH_AVR5, "__AVR_ATmega168P__",        0, 0, 0x0100, 1, "m168p")
-AVR_MCU ("atmega168pa",          ARCH_AVR5, "__AVR_ATmega168PA__",       0, 0, 0x0100, 1, "m168pa")
-AVR_MCU ("atmega169",            ARCH_AVR5, "__AVR_ATmega169__",         0, 0, 0x0100, 1, "m169")
-AVR_MCU ("atmega169a",           ARCH_AVR5, "__AVR_ATmega169A__",        0, 0, 0x0100, 1, "m169a")
-AVR_MCU ("atmega169p",           ARCH_AVR5, "__AVR_ATmega169P__",        0, 0, 0x0100, 1, "m169p")
-AVR_MCU ("atmega169pa",          ARCH_AVR5, "__AVR_ATmega169PA__",       0, 0, 0x0100, 1, "m169pa")
-AVR_MCU ("atmega16hvb",          ARCH_AVR5, "__AVR_ATmega16HVB__",       0, 0, 0x0100, 1, "m16hvb")
-AVR_MCU ("atmega16hvbrevb",      ARCH_AVR5, "__AVR_ATmega16HVBREVB__",   0, 0, 0x0100, 1, "m16hvbrevb")
-AVR_MCU ("atmega16m1",           ARCH_AVR5, "__AVR_ATmega16M1__",        0, 0, 0x0100, 1, "m16m1")
-AVR_MCU ("atmega16u4",           ARCH_AVR5, "__AVR_ATmega16U4__",        0, 0, 0x0100, 1, "m16u4")
-AVR_MCU ("atmega26hvg",          ARCH_AVR5, "__AVR_ATmega26HVG__",       0, 0, 0x0100, 1, "m26hvg")
-AVR_MCU ("atmega32a",            ARCH_AVR5, "__AVR_ATmega32A__",         0, 0, 0x0060, 1, "m32a")
-AVR_MCU ("atmega32",             ARCH_AVR5, "__AVR_ATmega32__",          0, 0, 0x0060, 1, "m32")
-AVR_MCU ("atmega323",            ARCH_AVR5, "__AVR_ATmega323__",         0, 0, 0x0060, 1, "m323")
-AVR_MCU ("atmega324a",           ARCH_AVR5, "__AVR_ATmega324A__",        0, 0, 0x0100, 1, "m324a")
-AVR_MCU ("atmega324p",           ARCH_AVR5, "__AVR_ATmega324P__",        0, 0, 0x0100, 1, "m324p")
-AVR_MCU ("atmega324pa",          ARCH_AVR5, "__AVR_ATmega324PA__",       0, 0, 0x0100, 1, "m324pa")
-AVR_MCU ("atmega325",            ARCH_AVR5, "__AVR_ATmega325__",         0, 0, 0x0100, 1, "m325")
-AVR_MCU ("atmega325a",           ARCH_AVR5, "__AVR_ATmega325A__",        0, 0, 0x0100, 1, "m325a")
-AVR_MCU ("atmega325p",           ARCH_AVR5, "__AVR_ATmega325P__",        0, 0, 0x0100, 1, "m325p")
-AVR_MCU ("atmega3250",           ARCH_AVR5, "__AVR_ATmega3250__",        0, 0, 0x0100, 1, "m3250")
-AVR_MCU ("atmega3250a",          ARCH_AVR5, "__AVR_ATmega3250A__",       0, 0, 0x0100, 1, "m3250a")
-AVR_MCU ("atmega3250p",          ARCH_AVR5, "__AVR_ATmega3250P__",       0, 0, 0x0100, 1, "m3250p")
-AVR_MCU ("atmega3250pa",         ARCH_AVR5, "__AVR_ATmega3250PA__",      0, 0, 0x0100, 1, "m3250pa")
-AVR_MCU ("atmega328",            ARCH_AVR5, "__AVR_ATmega328__",         0, 0, 0x0100, 1, "m328")
-AVR_MCU ("atmega328p",           ARCH_AVR5, "__AVR_ATmega328P__",        0, 0, 0x0100, 1, "m328p")
-AVR_MCU ("atmega329",            ARCH_AVR5, "__AVR_ATmega329__",         0, 0, 0x0100, 1, "m329")
-AVR_MCU ("atmega329a",           ARCH_AVR5, "__AVR_ATmega329A__",        0, 0, 0x0100, 1, "m329a")
-AVR_MCU ("atmega329p",           ARCH_AVR5, "__AVR_ATmega329P__",        0, 0, 0x0100, 1, "m329p")
-AVR_MCU ("atmega329pa",          ARCH_AVR5, "__AVR_ATmega329PA__",       0, 0, 0x0100, 1, "m329pa")
-AVR_MCU ("atmega3290",           ARCH_AVR5, "__AVR_ATmega3290__",        0, 0, 0x0100, 1, "m3290")
-AVR_MCU ("atmega3290a",          ARCH_AVR5, "__AVR_ATmega3290A__",       0, 0, 0x0100, 1, "m3290a")
-AVR_MCU ("atmega3290p",          ARCH_AVR5, "__AVR_ATmega3290P__",       0, 0, 0x0100, 1, "m3290p")
-AVR_MCU ("atmega3290pa",         ARCH_AVR5, "__AVR_ATmega3290PA__",      0, 0, 0x0100, 1, "m3290pa")
-AVR_MCU ("atmega32c1",           ARCH_AVR5, "__AVR_ATmega32C1__",        0, 0, 0x0100, 1, "m32c1")
-AVR_MCU ("atmega32m1",           ARCH_AVR5, "__AVR_ATmega32M1__",        0, 0, 0x0100, 1, "m32m1")
-AVR_MCU ("atmega32u4",           ARCH_AVR5, "__AVR_ATmega32U4__",        0, 0, 0x0100, 1, "m32u4")
-AVR_MCU ("atmega32u6",           ARCH_AVR5, "__AVR_ATmega32U6__",        0, 0, 0x0100, 1, "m32u6")
-AVR_MCU ("atmega406",            ARCH_AVR5, "__AVR_ATmega406__",         0, 0, 0x0100, 1, "m406")
-AVR_MCU ("atmega64",             ARCH_AVR5, "__AVR_ATmega64__",          0, 0, 0x0100, 1, "m64")
-AVR_MCU ("atmega64a",            ARCH_AVR5, "__AVR_ATmega64A__",         0, 0, 0x0100, 1, "m64a")
-AVR_MCU ("atmega640",            ARCH_AVR5, "__AVR_ATmega640__",         0, 0, 0x0200, 1, "m640")
-AVR_MCU ("atmega644",            ARCH_AVR5, "__AVR_ATmega644__",         0, 0, 0x0100, 1, "m644")
-AVR_MCU ("atmega644a",           ARCH_AVR5, "__AVR_ATmega644A__",        0, 0, 0x0100, 1, "m644a")
-AVR_MCU ("atmega644p",           ARCH_AVR5, "__AVR_ATmega644P__",        0, 0, 0x0100, 1, "m644p")
-AVR_MCU ("atmega644pa",          ARCH_AVR5, "__AVR_ATmega644PA__",       0, 0, 0x0100, 1, "m644pa")
-AVR_MCU ("atmega645",            ARCH_AVR5, "__AVR_ATmega645__",         0, 0, 0x0100, 1, "m645")
-AVR_MCU ("atmega645a",           ARCH_AVR5, "__AVR_ATmega645A__",        0, 0, 0x0100, 1, "m645a")
-AVR_MCU ("atmega645p",           ARCH_AVR5, "__AVR_ATmega645P__",        0, 0, 0x0100, 1, "m645p")
-AVR_MCU ("atmega6450",           ARCH_AVR5, "__AVR_ATmega6450__",        0, 0, 0x0100, 1, "m6450")
-AVR_MCU ("atmega6450a",          ARCH_AVR5, "__AVR_ATmega6450A__",       0, 0, 0x0100, 1, "m6450a")
-AVR_MCU ("atmega6450p",          ARCH_AVR5, "__AVR_ATmega6450P__",       0, 0, 0x0100, 1, "m6450p")
-AVR_MCU ("atmega649",            ARCH_AVR5, "__AVR_ATmega649__",         0, 0, 0x0100, 1, "m649")
-AVR_MCU ("atmega649a",           ARCH_AVR5, "__AVR_ATmega649A__",        0, 0, 0x0100, 1, "m649a")
-AVR_MCU ("atmega649p",           ARCH_AVR5, "__AVR_ATmega649P__",        0, 0, 0x0100, 1, "m649p")
-AVR_MCU ("atmega6490",           ARCH_AVR5, "__AVR_ATmega6490__",        0, 0, 0x0100, 1, "m6490")
-AVR_MCU ("atmega16hva",          ARCH_AVR5, "__AVR_ATmega16HVA__",       0, 0, 0x0100, 1, "m16hva")
-AVR_MCU ("atmega16hva2",         ARCH_AVR5, "__AVR_ATmega16HVA2__",      0, 0, 0x0100, 1, "m16hva2")
-AVR_MCU ("atmega32hvb",          ARCH_AVR5, "__AVR_ATmega32HVB__",       0, 0, 0x0100, 1, "m32hvb")
-AVR_MCU ("atmega6490a",          ARCH_AVR5, "__AVR_ATmega6490A__",       0, 0, 0x0100, 1, "m6490a")
-AVR_MCU ("atmega6490p",          ARCH_AVR5, "__AVR_ATmega6490P__",       0, 0, 0x0100, 1, "m6490p")
-AVR_MCU ("atmega64c1",           ARCH_AVR5, "__AVR_ATmega64C1__",        0, 0, 0x0100, 1, "m64c1")
-AVR_MCU ("atmega64m1",           ARCH_AVR5, "__AVR_ATmega64M1__",        0, 0, 0x0100, 1, "m64m1")
-AVR_MCU ("atmega64hve",          ARCH_AVR5, "__AVR_ATmega64HVE__",       0, 0, 0x0100, 1, "m64hve")
-AVR_MCU ("atmega64rfa2",         ARCH_AVR5, "__AVR_ATmega64RFA2__",      0, 0, 0x0200, 1, "m64rfa2")
-AVR_MCU ("atmega64rfr2",         ARCH_AVR5, "__AVR_ATmega64RFR2__",      0, 0, 0x0200, 1, "m64rfr2")
-AVR_MCU ("atmega32hvbrevb",      ARCH_AVR5, "__AVR_ATmega32HVBREVB__",   0, 0, 0x0100, 1, "m32hvbrevb")
-AVR_MCU ("atmega48hvf",          ARCH_AVR5, "__AVR_ATmega48HVF__",       0, 0, 0x0100, 1, "m48hvf")
-AVR_MCU ("at90can32",            ARCH_AVR5, "__AVR_AT90CAN32__",         0, 0, 0x0100, 1, "can32")
-AVR_MCU ("at90can64",            ARCH_AVR5, "__AVR_AT90CAN64__",         0, 0, 0x0100, 1, "can64")
-AVR_MCU ("at90pwm161",           ARCH_AVR5, "__AVR_AT90PWM161__",        0, 0, 0x0100, 1, "90pwm161")
-AVR_MCU ("at90pwm216",           ARCH_AVR5, "__AVR_AT90PWM216__",        0, 0, 0x0100, 1, "90pwm216")
-AVR_MCU ("at90pwm316",           ARCH_AVR5, "__AVR_AT90PWM316__",        0, 0, 0x0100, 1, "90pwm316")
-AVR_MCU ("at90scr100",           ARCH_AVR5, "__AVR_AT90SCR100__",        0, 0, 0x0100, 1, "90scr100")
-AVR_MCU ("at90usb646",           ARCH_AVR5, "__AVR_AT90USB646__",        0, 0, 0x0100, 1, "usb646")
-AVR_MCU ("at90usb647",           ARCH_AVR5, "__AVR_AT90USB647__",        0, 0, 0x0100, 1, "usb647")
-AVR_MCU ("at94k",                ARCH_AVR5, "__AVR_AT94K__",             0, 0, 0x0060, 1, "at94k")
-AVR_MCU ("m3000",                ARCH_AVR5, "__AVR_M3000__",             0, 0, 0x1000, 1, "m3000")
+AVR_MCU ("avr5",                 ARCH_AVR5, ADD_ISA_NONE, NULL,                        0, 0, 0x0060, 1, "m16")
+AVR_MCU ("ata5790",              ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATA5790__",           0, 0, 0x0100, 1, "a5790")
+AVR_MCU ("ata5790n",             ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATA5790N__",          0, 0, 0x0100, 1, "a5790n")
+AVR_MCU ("ata5795",              ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATA5795__",           0, 0, 0x0100, 1, "a5795")
+AVR_MCU ("atmega16",             ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16__",          0, 0, 0x0060, 1, "m16")
+AVR_MCU ("atmega16a",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16A__",         0, 0, 0x0060, 1, "m16a")
+AVR_MCU ("atmega161",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega161__",         0, 0, 0x0060, 1, "m161")
+AVR_MCU ("atmega162",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega162__",         0, 0, 0x0100, 1, "m162")
+AVR_MCU ("atmega163",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega163__",         0, 0, 0x0060, 1, "m163")
+AVR_MCU ("atmega164a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega164A__",        0, 0, 0x0100, 1, "m164a")
+AVR_MCU ("atmega164p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega164P__",        0, 0, 0x0100, 1, "m164p")
+AVR_MCU ("atmega164pa",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega164PA__",       0, 0, 0x0100, 1, "m164pa")
+AVR_MCU ("atmega165",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega165__",         0, 0, 0x0100, 1, "m165")
+AVR_MCU ("atmega165a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega165A__",        0, 0, 0x0100, 1, "m165a")
+AVR_MCU ("atmega165p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega165P__",        0, 0, 0x0100, 1, "m165p")
+AVR_MCU ("atmega165pa",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega165PA__",       0, 0, 0x0100, 1, "m165pa")
+AVR_MCU ("atmega168",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega168__",         0, 0, 0x0100, 1, "m168")
+AVR_MCU ("atmega168a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega168A__",        0, 0, 0x0100, 1, "m168a")
+AVR_MCU ("atmega168p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega168P__",        0, 0, 0x0100, 1, "m168p")
+AVR_MCU ("atmega168pa",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega168PA__",       0, 0, 0x0100, 1, "m168pa")
+AVR_MCU ("atmega169",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega169__",         0, 0, 0x0100, 1, "m169")
+AVR_MCU ("atmega169a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega169A__",        0, 0, 0x0100, 1, "m169a")
+AVR_MCU ("atmega169p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega169P__",        0, 0, 0x0100, 1, "m169p")
+AVR_MCU ("atmega169pa",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega169PA__",       0, 0, 0x0100, 1, "m169pa")
+AVR_MCU ("atmega16hvb",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16HVB__",       0, 0, 0x0100, 1, "m16hvb")
+AVR_MCU ("atmega16hvbrevb",      ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16HVBREVB__",   0, 0, 0x0100, 1, "m16hvbrevb")
+AVR_MCU ("atmega16m1",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16M1__",        0, 0, 0x0100, 1, "m16m1")
+AVR_MCU ("atmega16u4",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16U4__",        0, 0, 0x0100, 1, "m16u4")
+AVR_MCU ("atmega26hvg",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega26HVG__",       0, 0, 0x0100, 1, "m26hvg")
+AVR_MCU ("atmega32a",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32A__",         0, 0, 0x0060, 1, "m32a")
+AVR_MCU ("atmega32",             ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32__",          0, 0, 0x0060, 1, "m32")
+AVR_MCU ("atmega323",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega323__",         0, 0, 0x0060, 1, "m323")
+AVR_MCU ("atmega324a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega324A__",        0, 0, 0x0100, 1, "m324a")
+AVR_MCU ("atmega324p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega324P__",        0, 0, 0x0100, 1, "m324p")
+AVR_MCU ("atmega324pa",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega324PA__",       0, 0, 0x0100, 1, "m324pa")
+AVR_MCU ("atmega325",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega325__",         0, 0, 0x0100, 1, "m325")
+AVR_MCU ("atmega325a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega325A__",        0, 0, 0x0100, 1, "m325a")
+AVR_MCU ("atmega325p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega325P__",        0, 0, 0x0100, 1, "m325p")
+AVR_MCU ("atmega3250",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3250__",        0, 0, 0x0100, 1, "m3250")
+AVR_MCU ("atmega3250a",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3250A__",       0, 0, 0x0100, 1, "m3250a")
+AVR_MCU ("atmega3250p",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3250P__",       0, 0, 0x0100, 1, "m3250p")
+AVR_MCU ("atmega3250pa",         ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3250PA__",      0, 0, 0x0100, 1, "m3250pa")
+AVR_MCU ("atmega328",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega328__",         0, 0, 0x0100, 1, "m328")
+AVR_MCU ("atmega328p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega328P__",        0, 0, 0x0100, 1, "m328p")
+AVR_MCU ("atmega329",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega329__",         0, 0, 0x0100, 1, "m329")
+AVR_MCU ("atmega329a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega329A__",        0, 0, 0x0100, 1, "m329a")
+AVR_MCU ("atmega329p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega329P__",        0, 0, 0x0100, 1, "m329p")
+AVR_MCU ("atmega329pa",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega329PA__",       0, 0, 0x0100, 1, "m329pa")
+AVR_MCU ("atmega3290",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3290__",        0, 0, 0x0100, 1, "m3290")
+AVR_MCU ("atmega3290a",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3290A__",       0, 0, 0x0100, 1, "m3290a")
+AVR_MCU ("atmega3290p",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3290P__",       0, 0, 0x0100, 1, "m3290p")
+AVR_MCU ("atmega3290pa",         ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega3290PA__",      0, 0, 0x0100, 1, "m3290pa")
+AVR_MCU ("atmega32c1",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32C1__",        0, 0, 0x0100, 1, "m32c1")
+AVR_MCU ("atmega32m1",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32M1__",        0, 0, 0x0100, 1, "m32m1")
+AVR_MCU ("atmega32u4",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32U4__",        0, 0, 0x0100, 1, "m32u4")
+AVR_MCU ("atmega32u6",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32U6__",        0, 0, 0x0100, 1, "m32u6")
+AVR_MCU ("atmega406",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega406__",         0, 0, 0x0100, 1, "m406")
+AVR_MCU ("atmega64",             ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega64__",          0, 0, 0x0100, 1, "m64")
+AVR_MCU ("atmega64a",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega64A__",         0, 0, 0x0100, 1, "m64a")
+AVR_MCU ("atmega640",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega640__",         0, 0, 0x0200, 1, "m640")
+AVR_MCU ("atmega644",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega644__",         0, 0, 0x0100, 1, "m644")
+AVR_MCU ("atmega644a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega644A__",        0, 0, 0x0100, 1, "m644a")
+AVR_MCU ("atmega644p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega644P__",        0, 0, 0x0100, 1, "m644p")
+AVR_MCU ("atmega644pa",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega644PA__",       0, 0, 0x0100, 1, "m644pa")
+AVR_MCU ("atmega645",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega645__",         0, 0, 0x0100, 1, "m645")
+AVR_MCU ("atmega645a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega645A__",        0, 0, 0x0100, 1, "m645a")
+AVR_MCU ("atmega645p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega645P__",        0, 0, 0x0100, 1, "m645p")
+AVR_MCU ("atmega6450",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega6450__",        0, 0, 0x0100, 1, "m6450")
+AVR_MCU ("atmega6450a",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega6450A__",       0, 0, 0x0100, 1, "m6450a")
+AVR_MCU ("atmega6450p",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega6450P__",       0, 0, 0x0100, 1, "m6450p")
+AVR_MCU ("atmega649",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega649__",         0, 0, 0x0100, 1, "m649")
+AVR_MCU ("atmega649a",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega649A__",        0, 0, 0x0100, 1, "m649a")
+AVR_MCU ("atmega649p",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega649P__",        0, 0, 0x0100, 1, "m649p")
+AVR_MCU ("atmega6490",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega6490__",        0, 0, 0x0100, 1, "m6490")
+AVR_MCU ("atmega16hva",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16HVA__",       0, 0, 0x0100, 1, "m16hva")
+AVR_MCU ("atmega16hva2",         ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega16HVA2__",      0, 0, 0x0100, 1, "m16hva2")
+AVR_MCU ("atmega32hvb",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32HVB__",       0, 0, 0x0100, 1, "m32hvb")
+AVR_MCU ("atmega6490a",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega6490A__",       0, 0, 0x0100, 1, "m6490a")
+AVR_MCU ("atmega6490p",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega6490P__",       0, 0, 0x0100, 1, "m6490p")
+AVR_MCU ("atmega64c1",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega64C1__",        0, 0, 0x0100, 1, "m64c1")
+AVR_MCU ("atmega64m1",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega64M1__",        0, 0, 0x0100, 1, "m64m1")
+AVR_MCU ("atmega64hve",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega64HVE__",       0, 0, 0x0100, 1, "m64hve")
+AVR_MCU ("atmega64rfa2",         ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega64RFA2__",      0, 0, 0x0200, 1, "m64rfa2")
+AVR_MCU ("atmega64rfr2",         ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega64RFR2__",      0, 0, 0x0200, 1, "m64rfr2")
+AVR_MCU ("atmega32hvbrevb",      ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega32HVBREVB__",   0, 0, 0x0100, 1, "m32hvbrevb")
+AVR_MCU ("atmega48hvf",          ARCH_AVR5, ADD_ISA_NONE, "__AVR_ATmega48HVF__",       0, 0, 0x0100, 1, "m48hvf")
+AVR_MCU ("at90can32",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90CAN32__",         0, 0, 0x0100, 1, "can32")
+AVR_MCU ("at90can64",            ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90CAN64__",         0, 0, 0x0100, 1, "can64")
+AVR_MCU ("at90pwm161",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90PWM161__",        0, 0, 0x0100, 1, "90pwm161")
+AVR_MCU ("at90pwm216",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90PWM216__",        0, 0, 0x0100, 1, "90pwm216")
+AVR_MCU ("at90pwm316",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90PWM316__",        0, 0, 0x0100, 1, "90pwm316")
+AVR_MCU ("at90scr100",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90SCR100__",        0, 0, 0x0100, 1, "90scr100")
+AVR_MCU ("at90usb646",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90USB646__",        0, 0, 0x0100, 1, "usb646")
+AVR_MCU ("at90usb647",           ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT90USB647__",        0, 0, 0x0100, 1, "usb647")
+AVR_MCU ("at94k",                ARCH_AVR5, ADD_ISA_NONE, "__AVR_AT94K__",             0, 0, 0x0060, 1, "at94k")
+AVR_MCU ("m3000",                ARCH_AVR5, ADD_ISA_NONE, "__AVR_M3000__",             0, 0, 0x1000, 1, "m3000")
 /* Enhanced, == 128K.  */
-AVR_MCU ("avr51",                ARCH_AVR51, NULL,                       0, 0, 0x0100, 2, "m128")
-AVR_MCU ("atmega128",            ARCH_AVR51, "__AVR_ATmega128__",        0, 0, 0x0100, 2, "m128")
-AVR_MCU ("atmega128a",           ARCH_AVR51, "__AVR_ATmega128A__",       0, 0, 0x0100, 2, "m128a")
-AVR_MCU ("atmega1280",           ARCH_AVR51, "__AVR_ATmega1280__",       0, 0, 0x0200, 2, "m1280")
-AVR_MCU ("atmega1281",           ARCH_AVR51, "__AVR_ATmega1281__",       0, 0, 0x0200, 2, "m1281")
-AVR_MCU ("atmega1284",           ARCH_AVR51, "__AVR_ATmega1284__",       0, 0, 0x0100, 2, "m1284")
-AVR_MCU ("atmega1284p",          ARCH_AVR51, "__AVR_ATmega1284P__",      0, 0, 0x0100, 2, "m1284p")
-AVR_MCU ("atmega128rfa1",        ARCH_AVR51, "__AVR_ATmega128RFA1__",    0, 0, 0x0200, 2, "m128rfa1")
-AVR_MCU ("at90can128",           ARCH_AVR51, "__AVR_AT90CAN128__",       0, 0, 0x0100, 2, "can128")
-AVR_MCU ("at90usb1286",          ARCH_AVR51, "__AVR_AT90USB1286__",      0, 0, 0x0100, 2, "usb1286")
-AVR_MCU ("at90usb1287",          ARCH_AVR51, "__AVR_AT90USB1287__",      0, 0, 0x0100, 2, "usb1287")
+AVR_MCU ("avr51",                ARCH_AVR51, ADD_ISA_NONE, NULL,                       0, 0, 0x0100, 2, "m128")
+AVR_MCU ("atmega128",            ARCH_AVR51, ADD_ISA_NONE, "__AVR_ATmega128__",        0, 0, 0x0100, 2, "m128")
+AVR_MCU ("atmega128a",           ARCH_AVR51, ADD_ISA_NONE, "__AVR_ATmega128A__",       0, 0, 0x0100, 2, "m128a")
+AVR_MCU ("atmega1280",           ARCH_AVR51, ADD_ISA_NONE, "__AVR_ATmega1280__",       0, 0, 0x0200, 2, "m1280")
+AVR_MCU ("atmega1281",           ARCH_AVR51, ADD_ISA_NONE, "__AVR_ATmega1281__",       0, 0, 0x0200, 2, "m1281")
+AVR_MCU ("atmega1284",           ARCH_AVR51, ADD_ISA_NONE, "__AVR_ATmega1284__",       0, 0, 0x0100, 2, "m1284")
+AVR_MCU ("atmega1284p",          ARCH_AVR51, ADD_ISA_NONE, "__AVR_ATmega1284P__",      0, 0, 0x0100, 2, "m1284p")
+AVR_MCU ("atmega128rfa1",        ARCH_AVR51, ADD_ISA_NONE, "__AVR_ATmega128RFA1__",    0, 0, 0x0200, 2, "m128rfa1")
+AVR_MCU ("at90can128",           ARCH_AVR51, ADD_ISA_NONE, "__AVR_AT90CAN128__",       0, 0, 0x0100, 2, "can128")
+AVR_MCU ("at90usb1286",          ARCH_AVR51, ADD_ISA_NONE, "__AVR_AT90USB1286__",      0, 0, 0x0100, 2, "usb1286")
+AVR_MCU ("at90usb1287",          ARCH_AVR51, ADD_ISA_NONE, "__AVR_AT90USB1287__",      0, 0, 0x0100, 2, "usb1287")
 /* 3-Byte PC.  */
-AVR_MCU ("avr6",                 ARCH_AVR6, NULL,                        0, 0, 0x0200, 4, "m2561")
-AVR_MCU ("atmega2560",           ARCH_AVR6, "__AVR_ATmega2560__",        0, 0, 0x0200, 4, "m2560")
-AVR_MCU ("atmega2561",           ARCH_AVR6, "__AVR_ATmega2561__",        0, 0, 0x0200, 4, "m2561")
+AVR_MCU ("avr6",                 ARCH_AVR6, ADD_ISA_NONE, NULL,                        0, 0, 0x0200, 4, "m2561")
+AVR_MCU ("atmega2560",           ARCH_AVR6, ADD_ISA_NONE, "__AVR_ATmega2560__",        0, 0, 0x0200, 4, "m2560")
+AVR_MCU ("atmega2561",           ARCH_AVR6, ADD_ISA_NONE, "__AVR_ATmega2561__",        0, 0, 0x0200, 4, "m2561")
 /* Xmega, 16K <= Flash < 64K, RAM <= 64K */
-AVR_MCU ("avrxmega2",        ARCH_AVRXMEGA2, NULL,                       0, 0, 0x2000, 1, "x32a4")
-AVR_MCU ("atxmega16a4",      ARCH_AVRXMEGA2, "__AVR_ATxmega16A4__",      0, 0, 0x2000, 1, "x16a4")
-AVR_MCU ("atxmega16d4",      ARCH_AVRXMEGA2, "__AVR_ATxmega16D4__",      0, 0, 0x2000, 1, "x16d4")
-AVR_MCU ("atxmega16x1",      ARCH_AVRXMEGA2, "__AVR_ATxmega16X1__",      0, 0, 0x2000, 1, "x16x1")
-AVR_MCU ("atxmega32a4",      ARCH_AVRXMEGA2, "__AVR_ATxmega32A4__",      0, 0, 0x2000, 1, "x32a4")
-AVR_MCU ("atxmega32d4",      ARCH_AVRXMEGA2, "__AVR_ATxmega32D4__",      0, 0, 0x2000, 1, "x32d4")
-AVR_MCU ("atxmega32x1",      ARCH_AVRXMEGA2, "__AVR_ATxmega32X1__",      0, 0, 0x2000, 1, "x32x1")
-AVR_MCU ("atmxt112sl",       ARCH_AVRXMEGA2, "__AVR_ATMXT112SL__",       0, 0, 0x2000, 1, "mxt112sl")
-AVR_MCU ("atmxt224",         ARCH_AVRXMEGA2, "__AVR_ATMXT224__",         0, 0, 0x2000, 1, "mxt224")
-AVR_MCU ("atmxt224e",        ARCH_AVRXMEGA2, "__AVR_ATMXT224E__",        0, 0, 0x2000, 1, "mxt224e")
-AVR_MCU ("atmxt336s",        ARCH_AVRXMEGA2, "__AVR_ATMXT336S__",        0, 0, 0x2000, 1, "mxt336s")
-AVR_MCU ("atxmega16a4u",     ARCH_AVRXMEGA2, "__AVR_ATxmega16A4U__",     0, 0, 0x2000, 1, "x16a4u")
-AVR_MCU ("atxmega16c4",      ARCH_AVRXMEGA2, "__AVR_ATxmega16C4__",      0, 0, 0x2000, 1, "x16c4")
-AVR_MCU ("atxmega32a4u",     ARCH_AVRXMEGA2, "__AVR_ATxmega32A4U__",     0, 0, 0x2000, 1, "x32a4u")
-AVR_MCU ("atxmega32c4",      ARCH_AVRXMEGA2, "__AVR_ATxmega32C4__",      0, 0, 0x2000, 1, "x32c4")
-AVR_MCU ("atxmega32e5",      ARCH_AVRXMEGA2, "__AVR_ATxmega32E5__",      0, 0, 0x2000, 1, "x32e5")
+AVR_MCU ("avrxmega2",        ARCH_AVRXMEGA2, ADD_ISA_NONE, NULL,                       0, 0, 0x2000, 1, "x32a4")
+AVR_MCU ("atxmega16a4",      ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATxmega16A4__",      0, 0, 0x2000, 1, "x16a4")
+AVR_MCU ("atxmega16d4",      ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATxmega16D4__",      0, 0, 0x2000, 1, "x16d4")
+AVR_MCU ("atxmega16x1",      ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATxmega16X1__",      0, 0, 0x2000, 1, "x16x1")
+AVR_MCU ("atxmega32a4",      ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATxmega32A4__",      0, 0, 0x2000, 1, "x32a4")
+AVR_MCU ("atxmega32d4",      ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATxmega32D4__",      0, 0, 0x2000, 1, "x32d4")
+AVR_MCU ("atxmega32x1",      ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATxmega32X1__",      0, 0, 0x2000, 1, "x32x1")
+AVR_MCU ("atmxt112sl",       ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATMXT112SL__",       0, 0, 0x2000, 1, "mxt112sl")
+AVR_MCU ("atmxt224",         ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATMXT224__",         0, 0, 0x2000, 1, "mxt224")
+AVR_MCU ("atmxt224e",        ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATMXT224E__",        0, 0, 0x2000, 1, "mxt224e")
+AVR_MCU ("atmxt336s",        ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATMXT336S__",        0, 0, 0x2000, 1, "mxt336s")
+AVR_MCU ("atxmega16a4u",     ARCH_AVRXMEGA2, ADD_RMW_ISA,  "__AVR_ATxmega16A4U__",     0, 0, 0x2000, 1, "x16a4u")
+AVR_MCU ("atxmega16c4",      ARCH_AVRXMEGA2, ADD_RMW_ISA,  "__AVR_ATxmega16C4__",      0, 0, 0x2000, 1, "x16c4")
+AVR_MCU ("atxmega32a4u",     ARCH_AVRXMEGA2, ADD_RMW_ISA,  "__AVR_ATxmega32A4U__",     0, 0, 0x2000, 1, "x32a4u")
+AVR_MCU ("atxmega32c4",      ARCH_AVRXMEGA2, ADD_RMW_ISA,  "__AVR_ATxmega32C4__",      0, 0, 0x2000, 1, "x32c4")
+AVR_MCU ("atxmega32e5",      ARCH_AVRXMEGA2, ADD_ISA_NONE, "__AVR_ATxmega32E5__",      0, 0, 0x2000, 1, "x32e5")
 /* Xmega, 64K < Flash <= 128K, RAM <= 64K */
-AVR_MCU ("avrxmega4",        ARCH_AVRXMEGA4, NULL,                       0, 0, 0x2000, 2, "x64a4")
-AVR_MCU ("atxmega64a3",      ARCH_AVRXMEGA4, "__AVR_ATxmega64A3__",      0, 0, 0x2000, 2, "x64a3")
-AVR_MCU ("atxmega64d3",      ARCH_AVRXMEGA4, "__AVR_ATxmega64D3__",      0, 0, 0x2000, 2, "x64d3")
-AVR_MCU ("atxmega64a3u",     ARCH_AVRXMEGA4, "__AVR_ATxmega64A3U__",     0, 0, 0x2000, 2, "x64a3u")
-AVR_MCU ("atxmega64a4u",     ARCH_AVRXMEGA4, "__AVR_ATxmega64A4U__",     0, 0, 0x2000, 2, "x64a4u")
-AVR_MCU ("atxmega64b1",      ARCH_AVRXMEGA4, "__AVR_ATxmega64B1__",      0, 0, 0x2000, 2, "x64b1")
-AVR_MCU ("atxmega64b3",      ARCH_AVRXMEGA4, "__AVR_ATxmega64B3__",      0, 0, 0x2000, 2, "x64b3")
-AVR_MCU ("atxmega64c3",      ARCH_AVRXMEGA4, "__AVR_ATxmega64C3__",      0, 0, 0x2000, 2, "x64c3")
-AVR_MCU ("atxmega64d4",      ARCH_AVRXMEGA4, "__AVR_ATxmega64D4__",      0, 0, 0x2000, 2, "x64d4")
+AVR_MCU ("avrxmega4",        ARCH_AVRXMEGA4, ADD_ISA_NONE, NULL,                       0, 0, 0x2000, 2, "x64a4")
+AVR_MCU ("atxmega64a3",      ARCH_AVRXMEGA4, ADD_ISA_NONE, "__AVR_ATxmega64A3__",      0, 0, 0x2000, 2, "x64a3")
+AVR_MCU ("atxmega64d3",      ARCH_AVRXMEGA4, ADD_ISA_NONE, "__AVR_ATxmega64D3__",      0, 0, 0x2000, 2, "x64d3")
+AVR_MCU ("atxmega64a3u",     ARCH_AVRXMEGA4, ADD_RMW_ISA,  "__AVR_ATxmega64A3U__",     0, 0, 0x2000, 2, "x64a3u")
+AVR_MCU ("atxmega64a4u",     ARCH_AVRXMEGA4, ADD_RMW_ISA,  "__AVR_ATxmega64A4U__",     0, 0, 0x2000, 2, "x64a4u")
+AVR_MCU ("atxmega64b1",      ARCH_AVRXMEGA4, ADD_RMW_ISA,  "__AVR_ATxmega64B1__",      0, 0, 0x2000, 2, "x64b1")
+AVR_MCU ("atxmega64b3",      ARCH_AVRXMEGA4, ADD_RMW_ISA,  "__AVR_ATxmega64B3__",      0, 0, 0x2000, 2, "x64b3")
+AVR_MCU ("atxmega64c3",      ARCH_AVRXMEGA4, ADD_RMW_ISA,  "__AVR_ATxmega64C3__",      0, 0, 0x2000, 2, "x64c3")
+AVR_MCU ("atxmega64d4",      ARCH_AVRXMEGA4, ADD_ISA_NONE, "__AVR_ATxmega64D4__",      0, 0, 0x2000, 2, "x64d4")
 /* Xmega, 64K < Flash <= 128K, RAM > 64K */
-AVR_MCU ("avrxmega5",        ARCH_AVRXMEGA5, NULL,                       0, 0, 0x2000, 2, "x64a1")
-AVR_MCU ("atxmega64a1",      ARCH_AVRXMEGA5, "__AVR_ATxmega64A1__",      0, 0, 0x2000, 2, "x64a1")
-AVR_MCU ("atxmega64a1u",     ARCH_AVRXMEGA5, "__AVR_ATxmega64A1U__",     0, 0, 0x2000, 2, "x64a1u")
+AVR_MCU ("avrxmega5",        ARCH_AVRXMEGA5, ADD_ISA_NONE, NULL,                       0, 0, 0x2000, 2, "x64a1")
+AVR_MCU ("atxmega64a1",      ARCH_AVRXMEGA5, ADD_ISA_NONE, "__AVR_ATxmega64A1__",      0, 0, 0x2000, 2, "x64a1")
+AVR_MCU ("atxmega64a1u",     ARCH_AVRXMEGA5, ADD_RMW_ISA,  "__AVR_ATxmega64A1U__",     0, 0, 0x2000, 2, "x64a1u")
 /* Xmega, 128K < Flash, RAM <= 64K */
-AVR_MCU ("avrxmega6",        ARCH_AVRXMEGA6, NULL,                       0, 0, 0x2000, 6, "x128a3")
-AVR_MCU ("atxmega128a3",     ARCH_AVRXMEGA6, "__AVR_ATxmega128A3__",     0, 0, 0x2000, 3, "x128a3")
-AVR_MCU ("atxmega128d3",     ARCH_AVRXMEGA6, "__AVR_ATxmega128D3__",     0, 0, 0x2000, 3, "x128d3")
-AVR_MCU ("atxmega192a3",     ARCH_AVRXMEGA6, "__AVR_ATxmega192A3__",     0, 0, 0x2000, 4, "x192a3")
-AVR_MCU ("atxmega192d3",     ARCH_AVRXMEGA6, "__AVR_ATxmega192D3__",     0, 0, 0x2000, 4, "x192d3")
-AVR_MCU ("atxmega256a3",     ARCH_AVRXMEGA6, "__AVR_ATxmega256A3__",     0, 0, 0x2000, 5, "x256a3")
-AVR_MCU ("atxmega256a3b",    ARCH_AVRXMEGA6, "__AVR_ATxmega256A3B__",    0, 0, 0x2000, 5, "x256a3b")
-AVR_MCU ("atxmega256a3bu",   ARCH_AVRXMEGA6, "__AVR_ATxmega256A3BU__",   0, 0, 0x2000, 5, "x256a3bu")
-AVR_MCU ("atxmega256d3",     ARCH_AVRXMEGA6, "__AVR_ATxmega256D3__",     0, 0, 0x2000, 5, "x256d3")
-AVR_MCU ("atxmega128a3u",    ARCH_AVRXMEGA6, "__AVR_ATxmega128A3U__",    0, 0, 0x2000, 3, "x128a3u")
-AVR_MCU ("atxmega128b1",     ARCH_AVRXMEGA6, "__AVR_ATxmega128B1__",     0, 0, 0x2000, 3, "x128b1")
-AVR_MCU ("atxmega128b3",     ARCH_AVRXMEGA6, "__AVR_ATxmega128B3__",     0, 0, 0x2000, 3, "x128b3")
-AVR_MCU ("atxmega128c3",     ARCH_AVRXMEGA6, "__AVR_ATxmega128C3__",     0, 0, 0x2000, 3, "x128c3")
-AVR_MCU ("atxmega128d4",     ARCH_AVRXMEGA6, "__AVR_ATxmega128D4__",     0, 0, 0x2000, 3, "x128d4")
-AVR_MCU ("atmxt540s",        ARCH_AVRXMEGA6, "__AVR_ATMXT540S__",        0, 0, 0x2000, 2, "mxt540s")
-AVR_MCU ("atmxt540sreva",    ARCH_AVRXMEGA6, "__AVR_ATMXT540SREVA__",    0, 0, 0x2000, 2, "mxt540sreva")
-AVR_MCU ("atxmega192a3u",    ARCH_AVRXMEGA6, "__AVR_ATxmega192A3U__",    0, 0, 0x2000, 4, "x192a3u")
-AVR_MCU ("atxmega192c3",     ARCH_AVRXMEGA6, "__AVR_ATxmega192C3__",     0, 0, 0x2000, 4, "x192c3")
-AVR_MCU ("atxmega256a3u",    ARCH_AVRXMEGA6, "__AVR_ATxmega256A3U__",    0, 0, 0x2000, 5, "x256a3u")
-AVR_MCU ("atxmega256c3",     ARCH_AVRXMEGA6, "__AVR_ATxmega256C3__",     0, 0, 0x2000, 5, "x256c3")
-AVR_MCU ("atxmega384c3",     ARCH_AVRXMEGA6, "__AVR_ATxmega384C3__",     0, 0, 0x2000, 6, "x384c3")
-AVR_MCU ("atxmega384d3",     ARCH_AVRXMEGA6, "__AVR_ATxmega384D3__",     0, 0, 0x2000, 6, "x384d3")
+AVR_MCU ("avrxmega6",        ARCH_AVRXMEGA6, ADD_ISA_NONE, NULL,                       0, 0, 0x2000, 6, "x128a3")
+AVR_MCU ("atxmega128a3",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega128A3__",     0, 0, 0x2000, 3, "x128a3")
+AVR_MCU ("atxmega128d3",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega128D3__",     0, 0, 0x2000, 3, "x128d3")
+AVR_MCU ("atxmega192a3",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega192A3__",     0, 0, 0x2000, 4, "x192a3")
+AVR_MCU ("atxmega192d3",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega192D3__",     0, 0, 0x2000, 4, "x192d3")
+AVR_MCU ("atxmega256a3",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega256A3__",     0, 0, 0x2000, 5, "x256a3")
+AVR_MCU ("atxmega256a3b",    ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega256A3B__",    0, 0, 0x2000, 5, "x256a3b")
+AVR_MCU ("atxmega256a3bu",   ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega256A3BU__",   0, 0, 0x2000, 5, "x256a3bu")
+AVR_MCU ("atxmega256d3",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega256D3__",     0, 0, 0x2000, 5, "x256d3")
+AVR_MCU ("atxmega128a3u",    ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega128A3U__",    0, 0, 0x2000, 3, "x128a3u")
+AVR_MCU ("atxmega128b1",     ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega128B1__",     0, 0, 0x2000, 3, "x128b1")
+AVR_MCU ("atxmega128b3",     ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega128B3__",     0, 0, 0x2000, 3, "x128b3")
+AVR_MCU ("atxmega128c3",     ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega128C3__",     0, 0, 0x2000, 3, "x128c3")
+AVR_MCU ("atxmega128d4",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega128D4__",     0, 0, 0x2000, 3, "x128d4")
+AVR_MCU ("atmxt540s",        ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATMXT540S__",        0, 0, 0x2000, 2, "mxt540s")
+AVR_MCU ("atmxt540sreva",    ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATMXT540SREVA__",    0, 0, 0x2000, 2, "mxt540sreva")
+AVR_MCU ("atxmega192a3u",    ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega192A3U__",    0, 0, 0x2000, 4, "x192a3u")
+AVR_MCU ("atxmega192c3",     ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega192C3__",     0, 0, 0x2000, 4, "x192c3")
+AVR_MCU ("atxmega256a3u",    ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega256A3U__",    0, 0, 0x2000, 5, "x256a3u")
+AVR_MCU ("atxmega256c3",     ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega256C3__",     0, 0, 0x2000, 5, "x256c3")
+AVR_MCU ("atxmega384c3",     ARCH_AVRXMEGA6, ADD_RMW_ISA,  "__AVR_ATxmega384C3__",     0, 0, 0x2000, 6, "x384c3")
+AVR_MCU ("atxmega384d3",     ARCH_AVRXMEGA6, ADD_ISA_NONE, "__AVR_ATxmega384D3__",     0, 0, 0x2000, 6, "x384d3")
 /* Xmega, 128K < Flash, RAM > 64K RAM.  */
-AVR_MCU ("avrxmega7",        ARCH_AVRXMEGA7, NULL,                       0, 0, 0x2000, 3, "x128a1")
-AVR_MCU ("atxmega128a1",     ARCH_AVRXMEGA7, "__AVR_ATxmega128A1__",     0, 0, 0x2000, 3, "x128a1")
-AVR_MCU ("atxmega128a1u",    ARCH_AVRXMEGA7, "__AVR_ATxmega128A1U__",    0, 0, 0x2000, 3, "x128a1u")
-AVR_MCU ("atxmega128a4u",    ARCH_AVRXMEGA7, "__AVR_ATxmega128A4U__",    0, 0, 0x2000, 3, "x128a4u")
+AVR_MCU ("avrxmega7",        ARCH_AVRXMEGA7, ADD_ISA_NONE, NULL,                       0, 0, 0x2000, 3, "x128a1")
+AVR_MCU ("atxmega128a1",     ARCH_AVRXMEGA7, ADD_ISA_NONE, "__AVR_ATxmega128A1__",     0, 0, 0x2000, 3, "x128a1")
+AVR_MCU ("atxmega128a1u",    ARCH_AVRXMEGA7, ADD_RMW_ISA,  "__AVR_ATxmega128A1U__",    0, 0, 0x2000, 3, "x128a1u")
+AVR_MCU ("atxmega128a4u",    ARCH_AVRXMEGA7, ADD_RMW_ISA,  "__AVR_ATxmega128A4U__",    0, 0, 0x2000, 3, "x128a4u")
 /* Assembler only.  */
-AVR_MCU ("avr1",                 ARCH_AVR1, NULL,                        0, 0, 0x0060, 1, "s1200")
-AVR_MCU ("at90s1200",            ARCH_AVR1, "__AVR_AT90S1200__",         0, 0, 0x0060, 1, "s1200")
-AVR_MCU ("attiny11",             ARCH_AVR1, "__AVR_ATtiny11__",          0, 0, 0x0060, 1, "tn11")
-AVR_MCU ("attiny12",             ARCH_AVR1, "__AVR_ATtiny12__",          0, 0, 0x0060, 1, "tn12")
-AVR_MCU ("attiny15",             ARCH_AVR1, "__AVR_ATtiny15__",          0, 0, 0x0060, 1, "tn15")
-AVR_MCU ("attiny28",             ARCH_AVR1, "__AVR_ATtiny28__",          0, 0, 0x0060, 1, "tn28")
+AVR_MCU ("avr1",                 ARCH_AVR1, ADD_ISA_NONE, NULL,                        0, 0, 0x0060, 1, "s1200")
+AVR_MCU ("at90s1200",            ARCH_AVR1, ADD_ISA_NONE, "__AVR_AT90S1200__",         0, 0, 0x0060, 1, "s1200")
+AVR_MCU ("attiny11",             ARCH_AVR1, ADD_ISA_NONE, "__AVR_ATtiny11__",          0, 0, 0x0060, 1, "tn11")
+AVR_MCU ("attiny12",             ARCH_AVR1, ADD_ISA_NONE, "__AVR_ATtiny12__",          0, 0, 0x0060, 1, "tn12")
+AVR_MCU ("attiny15",             ARCH_AVR1, ADD_ISA_NONE, "__AVR_ATtiny15__",          0, 0, 0x0060, 1, "tn15")
+AVR_MCU ("attiny28",             ARCH_AVR1, ADD_ISA_NONE, "__AVR_ATtiny28__",          0, 0, 0x0060, 1, "tn28")
diff --git a/gcc/config/avr/driver-avr.c b/gcc/config/avr/driver-avr.c
index cb5dd1d..da47204 100644
--- a/gcc/config/avr/driver-avr.c
+++ b/gcc/config/avr/driver-avr.c
@@ -60,6 +60,7 @@ avr_device_to_as (int argc, const char **argv)
 
   return concat ("-mmcu=", avr_current_arch->arch_name,
                  avr_current_device->errata_skip ? "" : " -mno-skip-bug",
+                 avr_current_device->additional_isa & ADD_RMW_ISA ? " -mrmw" : "",
                  NULL);
 }
 
diff --git a/gcc/config/avr/genmultilib.awk b/gcc/config/avr/genmultilib.awk
index 90e5e5c..4875574 100644
--- a/gcc/config/avr/genmultilib.awk
+++ b/gcc/config/avr/genmultilib.awk
@@ -86,7 +86,7 @@ BEGIN {
     name = $2
     gsub ("\"", "", name)
 
-    if ($4 == "NULL")
+    if ($5 == "NULL")
     {
 	core = name
 
@@ -106,7 +106,7 @@ BEGIN {
     if (core == "avr1")
 	next
 
-    tiny_stack[name]  = $5
+    tiny_stack[name]  = $6
     mcu[n_mcu] = name
     n_mcu++
     option[name]      = "mmcu=" name
diff --git a/gcc/testsuite/gcc.target/avr/additional-isa.c b/gcc/testsuite/gcc.target/avr/additional-isa.c
new file mode 100644
index 0000000..9dee385
--- /dev/null
+++ b/gcc/testsuite/gcc.target/avr/additional-isa.c
@@ -0,0 +1,13 @@
+/* Verify that additional isa options are passed */
+/* { dg-do assemble } */
+/* { dg-options "-mmcu=atxmega32a4u" } */
+/* { dg-skip-if "Only for Xmega" { "avr-*-*" } { "*" } { "-mmcu=atxmega32a4u" } } */
+
+int main()
+{
+  __asm("xch Z, r12");
+  __asm("las Z, r12");
+  __asm("lac Z, r12");
+  __asm("lat Z, r12");
+  return 0;
+}

[-- Attachment #3: device-specific-isa-avr-as.patch --]
[-- Type: application/octet-stream, Size: 5248 bytes --]

diff --git a/gas/config/tc-avr.c b/gas/config/tc-avr.c
index 332aa2d..bc57a31 100644
--- a/gas/config/tc-avr.c
+++ b/gas/config/tc-avr.c
@@ -283,8 +283,10 @@ static struct mcu_type_s mcu_types[] =
   {NULL, 0, 0}
 };
 
+
 /* Current MCU type.  */
 static struct mcu_type_s   default_mcu = {"avr2", AVR_ISA_AVR2, bfd_mach_avr2};
+static struct mcu_type_s   specified_mcu;
 static struct mcu_type_s * avr_mcu = & default_mcu;
 
 /* AVR target-specific switches.  */
@@ -355,7 +357,8 @@ enum options
 {
   OPTION_ALL_OPCODES = OPTION_MD_BASE + 1,
   OPTION_NO_SKIP_BUG,
-  OPTION_NO_WRAP
+  OPTION_NO_WRAP,
+  OPTION_RMW_ISA
 };
 
 struct option md_longopts[] =
@@ -364,6 +367,7 @@ struct option md_longopts[] =
   { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES },
   { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG },
   { "mno-wrap",     no_argument, NULL, OPTION_NO_WRAP     },
+  { "mrmw",         no_argument, NULL, OPTION_RMW_ISA     },
   { NULL, no_argument, NULL, 0 }
 };
 
@@ -468,7 +472,9 @@ md_show_usage (FILE *stream)
 	"  -mno-skip-bug    disable warnings for skipping two-word instructions\n"
 	"                   (default for avr4, avr5)\n"
 	"  -mno-wrap        reject rjmp/rcall instructions with 8K wrap-around\n"
-	"                   (default for avr3, avr5)\n"));
+	"                   (default for avr3, avr5)\n"
+    "  -mrmw            accept RMW instructions\n"
+    ));
   show_mcu_list (stream);
 }
 
@@ -515,7 +521,12 @@ md_parse_option (int c, char *arg)
 	   type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
 	   as .arch ... in the asm output at the same time.  */
 	if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach)
-	  avr_mcu = &mcu_types[i];
+      {
+        specified_mcu.name = mcu_types[i].name;
+        specified_mcu.isa  |= mcu_types[i].isa;
+        specified_mcu.mach = mcu_types[i].mach;
+        avr_mcu = &specified_mcu;
+      }
 	else
 	  as_fatal (_("redefinition of mcu type `%s' to `%s'"),
 		    avr_mcu->name, mcu_types[i].name);
@@ -530,6 +541,9 @@ md_parse_option (int c, char *arg)
     case OPTION_NO_WRAP:
       avr_opt.no_wrap = 1;
       return 1;
+    case OPTION_RMW_ISA:
+      specified_mcu.isa |= AVR_ISA_RMW;
+      return 1;
     }
 
   return 0;
diff --git a/gas/doc/c-avr.texi b/gas/doc/c-avr.texi
index 213e82c..603d755 100644
--- a/gas/doc/c-avr.texi
+++ b/gas/doc/c-avr.texi
@@ -125,6 +125,10 @@ This option disable warnings for skipping two-word instructions.
 @item -mno-wrap
 This option reject @code{rjmp/rcall} instructions with 8K wrap-around.
 
+@cindex @code{-mrmw} command line option, AVR
+@item -mrmw
+Accept RMW (@code{XCH,LAC,LAS,LAT}) instructions.
+
 @end table
 
 
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

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2014-02-25 12:05 Device specific ISA support in AVR S, Pitchumani

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