7 x86 gas has a new .arch pseudo op to specify the target CPU architecture.
9 x86 gas -q command line option quietens warnings about register size changes
10 due to suffix, indirect jmp/call without `*', stand-alone prefixes, and
11 translating various deprecated floating point instructions.
15 Support for ATMEL AVR.
17 Support for IBM 370 ELF. Somewhat experimental.
19 Support for numbers with suffixes.
21 Added support for breaking to the end of repeat loops.
23 Added support for parallel instruction syntax (DOUBLEBAR_PARALLEL).
25 New .elseif pseudo-op added.
27 New --fatal-warnings option.
29 picoJava architecture support added.
31 Motorola MCore 210 processor support added.
33 A new pseudo-op .intel_syntax has been implemented to allow gas to parse i386
34 assembly programs with intel syntax.
36 New pseudo-ops .func,.endfunc to aid in debugging user-written assembler code.
38 Added -gdwarf2 option to generate DWARF 2 debugging information.
40 Full 16-bit mode support for i386.
42 Greatly improved instruction operand checking for i386. This change will
43 produce errors or warnings on incorrect assembly code that previous versions of
44 gas accepted. If you get unexpected messages from code that worked with older
45 versions of gas, please double check the code before reporting a bug.
47 Weak symbol support added for COFF targets.
49 Mitsubishi D30V support added.
51 Texas Instruments c80 (tms320c80) support added.
53 i960 ELF support added.
55 ARM ELF support added.
59 Texas Instruments c30 (tms320c30) support added.
61 The assembler now optimizes the exception frame information generated by egcs
62 and gcc 2.8. The new --traditional-format option disables this optimization.
64 Added --gstabs option to generate stabs debugging information.
66 The -a option takes a new suboption, m (e.g., -alm) to expand macros in a
69 Added -MD option to print dependencies.
77 Motorola ColdFire 5200 support added (configure for m68k and use -m5200).
79 Alpha/VMS support added.
81 m68k options --base-size-default-16, --base-size-default-32,
82 --disp-size-default-16, and --disp-size-default-32 added.
84 The alignment directives now take an optional third argument, which is the
85 maximum number of bytes to skip. If doing the alignment would require skipping
86 more than the given number of bytes, the alignment is not done at all.
88 The ELF assembler has a new pseudo-op, .symver, used for symbol versioning.
90 The -a option takes a new suboption, c (e.g., -alc), to skip false conditionals
93 Added new pseudo-op, .equiv; it's like .equ, except that it is an error if the
94 symbol is already defined.
98 The PowerPC assembler now allows the use of symbolic register names (r0, etc.)
99 if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.) can be
100 used any time. PowerPC 860 move to/from SPR instructions have been added.
102 Alpha Linux (ELF) support added.
104 PowerPC ELF support added.
106 m68k Linux (ELF) support added.
108 i960 Hx/Jx support added.
110 i386/PowerPC gnu-win32 support added.
112 SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the
113 default is to build COFF-only support. To get a set of tools that generate ELF
114 (they'll understand both COFF and ELF), you must configure with
115 target=i386-unknown-sco3.2v5elf.
117 m88k-motorola-sysv3* support added.
121 Gas now directly supports macros, without requiring GASP.
123 Gas now has an MRI assembler compatibility mode. Use -M or --mri to select MRI
124 mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the ``.mri
125 0'' is seen; this can be convenient for inline assembler code.
127 Added --defsym SYM=VALUE option.
129 Added -mips4 support to MIPS assembler.
131 Added PIC support to Solaris and SPARC SunOS 4 assembler.
135 Converted this directory to use an autoconf-generated configure script.
137 ARM support, from Richard Earnshaw.
139 Updated VMS support, from Pat Rankin, including considerably improved debugging
142 Support for the control registers in the 68060.
144 Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to
145 provide for possible future gcc changes, for targets where gas provides some
146 features not available in the native assembler. If the native assembler is
147 used, it should become obvious pretty quickly what the problem is.
149 Usage message is available with "--help".
151 The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3
152 also, but didn't get into the NEWS file.)
154 Weak symbol support for a.out.
156 A bug in the listing code which could cause an infinite loop has been fixed.
157 Bugs in listings when generating a COFF object file have also been fixed.
159 Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by Paul
162 Improved Alpha support. Immediate constants can have a much larger range now.
163 Support for the 21164 has been contributed by Digital.
165 Updated ns32k (pc532-mach, netbsd532) support from Ian Dall.
169 Mach i386 support, by David Mackenzie and Ken Raeburn.
171 RS/6000 and PowerPC support by Ian Taylor.
173 VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit,
174 based on mail received from various people. The `-h#' option should work again
177 HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work
178 with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special
179 version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve
180 this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu
181 in the "dist" directory.
183 Vax support in gas fixed for BSD, so it builds and seems to run a couple simple
184 tests okay. I haven't put it through extensive testing. (GNU make is
185 currently required for BSD 4.3 builds.)
187 Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is
188 based on code donated by CMU, which used an a.out-based format. I'm afraid the
189 alpha-a.out support is pretty badly mangled, and much of it removed; making it
190 work will require rewriting it as BFD support for the format anyways.
194 The test suites have been fixed up a bit, so that they should work with a
195 couple different versions of expect and dejagnu.
197 Symbols' values are now handled internally as expressions, permitting more
198 flexibility in evaluating them in some cases. Some details of relocation
199 handling have also changed, and simple constant pool management has been added,
200 to make the Alpha port easier.
202 New option "--statistics" for printing out program run times. This is intended
203 to be used with the gcc "-Q" option, which prints out times spent in various
204 phases of compilation. (You should be able to get all of them printed out with
205 "gcc -Q -Wa,--statistics", I think.)
207 ----------------------------------------------------------------
211 RS/6000 AIX and MIPS SGI Irix 5 support has been added.
213 Configurations that are still in development (and therefore are convenient to
214 have listed in configure.in) still get rejected without a minor change to
215 gas/Makefile.in, so people not doing development work shouldn't get the
216 impression that support for such configurations is actually believed to be
219 The program name (usually "as") is printed when a fatal error message is
220 displayed. This should prevent some confusion about the source of occasional
221 messages about "internal errors".
223 ELF support is falling into place. Support for the 386 should be working.
224 Support for SPARC Solaris is in. HPPA support from Utah is being integrated.
226 Symbol values are maintained as expressions instead of being immediately boiled
227 down to add-symbol, sub-symbol, and constant. This permits slightly more
228 complex calculations involving symbols whose values are not alreadey known.
230 DBX-style debugging info ("stabs") is now supported for COFF formats.
231 If any stabs directives are seen in the source, GAS will create two new
232 sections: a ".stab" and a ".stabstr" section. The format of the .stab
233 section is nearly identical to the a.out symbol format, and .stabstr is
234 its string table. For this to be useful, you must have configured GCC
235 to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB
236 that can use the stab sections (4.11 or later).
238 LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS
239 support is in progress.
241 ----------------------------------------------------------------
245 Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been
246 incorporated, but not well tested yet.
248 Altered the opcode table split for m68k; it should require less VM to compile
251 Some minor adjustments to add (Convergent Technologies') Miniframe support,
252 suggested by Ronald Cole.
254 HPPA support (running OSF only, not HPUX) has been contributed by Utah. This
255 includes improved ELF support, which I've started adapting for SPARC Solaris
256 2.x. Integration isn't completely, so it probably won't work.
258 HP9000/300 support, donated by HP, has been merged in.
260 Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support.
262 Better error messages for unsupported configurations (e.g., hppa-hpux).
264 Test suite framework is starting to become reasonable.
266 ----------------------------------------------------------------
272 Some more merging of BFD and ELF code, but ELF still doesn't work.
274 ----------------------------------------------------------------
278 BFD merge is partly done. Adventurous souls may try giving configure the
279 "--with-bfd-assembler" option. Currently, ELF format requires it, a.out format
280 accepts it; SPARC CPU accepts it. It's the default only for OS "elf" or
281 "solaris". (ELF isn't really supported yet. It needs work. I've got some
282 code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not fully
285 The 68K opcode table has been split in half. It should now compile under gcc
286 without consuming ridiculous amounts of memory.
288 A couple data structures have been reduced in size. This should result in
289 saving a little bit of space at runtime.
291 Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF
292 code provided ROSE format support, which I haven't merged in yet. (I can make
293 it available, if anyone wants to try it out.) Ralph's code, for BSD 4.4,
294 supports a.out format. We don't have ECOFF support in just yet; it's coming.
296 Support for the Hitachi H8/500 has been added.
298 VMS host and target support should be working now, thanks chiefly to Eric
301 ----------------------------------------------------------------
305 For m68k, support for more processors has been added: 68040, CPU32, 68851.
307 For i386, .align is now power-of-two; was number-of-bytes.
309 For m68k, "%" is now accepted before register names. For COFF format, which
310 doesn't use underscore prefixes for C labels, it is required, so variable "a0"
311 can be distinguished from the register.
313 Last public release was 1.38. Lots of configuration changes since then, lots
314 of new CPUs and formats, lots of bugs fixed.