Running the gas testsuite through valgrind on the mentioned targets yields:
Executing on host: sh -c {valgrind -q /home/hp/binutils/obj/a/gas/as-new  -alm
/home/hp/binutils/src/gas/testsuite/gas/macros/dot.s 2>&1}  /dev/null dump.out
(timeout = 300)
/home/hp/binutils/src/gas/testsuite/gas/macros/dot.s: Assembler messages:
/home/hp/binutils/src/gas/testsuite/gas/macros/dot.s:13: Warning: attempt to
redefine pseudo-op `.macro' ignored
==29160== Use of uninitialised value of size 4
==29160==    at 0x805C566: _find_end_of_line (read.c:5803)
==29160==    by 0x80623A1: read_a_source_file (read.c:725)
==29160==    by 0x804C21E: main (as.c:1045)
==29160== 
==29160== Conditional jump or move depends on uninitialised value(s)
==29160==    at 0x8062808: read_a_source_file (read.c:792)
==29160==    by 0x804C21E: main (as.c:1045)
/home/hp/binutils/src/gas/testsuite/gas/macros/dot.s:27: Error: unknown
pseudo-op: `.xyz'
/home/hp/binutils/src/gas/testsuite/gas/macros/dot.s:28: Error: bad instruction
`x.y.z 0'
ARM GAS  /home/hp/binutils/src/gas/testsuite/gas/macros/dot.s 			page 1


   1              	 .altmacro
... (gas listing elided)
regexp_diff match failure
regexp "^.*:27: Error: unknown pseudo-op: .\.xyz.$"
line   "==29160== Use of uninitialised value of size 4"
regexp_diff match failure
regexp "^.*:28: Error: .*$"
line   "==29160==    at 0x805C566: _find_end_of_line (read.c:5803)"
FAIL: macros dot