5 x86 gas now supports the full Pentium4 instruction set.
7 Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs.
9 Support for Motorola 68HC11 and 68HC12.
11 Support for Texas Instruments TMS320C54x (tic54x).
15 Support for i860, by Jason Eckhardt.
17 Support for CRIS (Axis Communications ETRAX series).
19 x86 gas has a new .arch pseudo op to specify the target CPU architecture.
21 x86 gas -q command line option quietens warnings about register size changes
22 due to suffix, indirect jmp/call without `*', stand-alone prefixes, and
23 translating various deprecated floating point instructions.
27 Support for the ARM msr instruction was changed to only allow an immediate
28 operand when altering the flags field.
30 Support for ATMEL AVR.
32 Support for IBM 370 ELF. Somewhat experimental.
34 Support for numbers with suffixes.
36 Added support for breaking to the end of repeat loops.
38 Added support for parallel instruction syntax (DOUBLEBAR_PARALLEL).
40 New .elseif pseudo-op added.
42 New --fatal-warnings option.
44 picoJava architecture support added.
46 Motorola MCore 210 processor support added.
48 A new pseudo-op .intel_syntax has been implemented to allow gas to parse i386
49 assembly programs with intel syntax.
51 New pseudo-ops .func,.endfunc to aid in debugging user-written assembler code.
53 Added -gdwarf2 option to generate DWARF 2 debugging information.
55 Full 16-bit mode support for i386.
57 Greatly improved instruction operand checking for i386. This change will
58 produce errors or warnings on incorrect assembly code that previous versions of
59 gas accepted. If you get unexpected messages from code that worked with older
60 versions of gas, please double check the code before reporting a bug.
62 Weak symbol support added for COFF targets.
64 Mitsubishi D30V support added.
66 Texas Instruments c80 (tms320c80) support added.
68 i960 ELF support added.
70 ARM ELF support added.
74 Texas Instruments c30 (tms320c30) support added.
76 The assembler now optimizes the exception frame information generated by egcs
77 and gcc 2.8. The new --traditional-format option disables this optimization.
79 Added --gstabs option to generate stabs debugging information.
81 The -a option takes a new suboption, m (e.g., -alm) to expand macros in a
84 Added -MD option to print dependencies.
92 Motorola ColdFire 5200 support added (configure for m68k and use -m5200).
94 Alpha/VMS support added.
96 m68k options --base-size-default-16, --base-size-default-32,
97 --disp-size-default-16, and --disp-size-default-32 added.
99 The alignment directives now take an optional third argument, which is the
100 maximum number of bytes to skip. If doing the alignment would require skipping
101 more than the given number of bytes, the alignment is not done at all.
103 The ELF assembler has a new pseudo-op, .symver, used for symbol versioning.
105 The -a option takes a new suboption, c (e.g., -alc), to skip false conditionals
108 Added new pseudo-op, .equiv; it's like .equ, except that it is an error if the
109 symbol is already defined.
113 The PowerPC assembler now allows the use of symbolic register names (r0, etc.)
114 if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.) can be
115 used any time. PowerPC 860 move to/from SPR instructions have been added.
117 Alpha Linux (ELF) support added.
119 PowerPC ELF support added.
121 m68k Linux (ELF) support added.
123 i960 Hx/Jx support added.
125 i386/PowerPC gnu-win32 support added.
127 SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the
128 default is to build COFF-only support. To get a set of tools that generate ELF
129 (they'll understand both COFF and ELF), you must configure with
130 target=i386-unknown-sco3.2v5elf.
132 m88k-motorola-sysv3* support added.
136 Gas now directly supports macros, without requiring GASP.
138 Gas now has an MRI assembler compatibility mode. Use -M or --mri to select MRI
139 mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the ``.mri
140 0'' is seen; this can be convenient for inline assembler code.
142 Added --defsym SYM=VALUE option.
144 Added -mips4 support to MIPS assembler.
146 Added PIC support to Solaris and SPARC SunOS 4 assembler.
150 Converted this directory to use an autoconf-generated configure script.
152 ARM support, from Richard Earnshaw.
154 Updated VMS support, from Pat Rankin, including considerably improved debugging
157 Support for the control registers in the 68060.
159 Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to
160 provide for possible future gcc changes, for targets where gas provides some
161 features not available in the native assembler. If the native assembler is
162 used, it should become obvious pretty quickly what the problem is.
164 Usage message is available with "--help".
166 The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3
167 also, but didn't get into the NEWS file.)
169 Weak symbol support for a.out.
171 A bug in the listing code which could cause an infinite loop has been fixed.
172 Bugs in listings when generating a COFF object file have also been fixed.
174 Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by Paul
177 Improved Alpha support. Immediate constants can have a much larger range now.
178 Support for the 21164 has been contributed by Digital.
180 Updated ns32k (pc532-mach, netbsd532) support from Ian Dall.
184 Mach i386 support, by David Mackenzie and Ken Raeburn.
186 RS/6000 and PowerPC support by Ian Taylor.
188 VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit,
189 based on mail received from various people. The `-h#' option should work again
192 HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work
193 with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special
194 version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve
195 this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu
196 in the "dist" directory.
198 Vax support in gas fixed for BSD, so it builds and seems to run a couple simple
199 tests okay. I haven't put it through extensive testing. (GNU make is
200 currently required for BSD 4.3 builds.)
202 Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is
203 based on code donated by CMU, which used an a.out-based format. I'm afraid the
204 alpha-a.out support is pretty badly mangled, and much of it removed; making it
205 work will require rewriting it as BFD support for the format anyways.
209 The test suites have been fixed up a bit, so that they should work with a
210 couple different versions of expect and dejagnu.
212 Symbols' values are now handled internally as expressions, permitting more
213 flexibility in evaluating them in some cases. Some details of relocation
214 handling have also changed, and simple constant pool management has been added,
215 to make the Alpha port easier.
217 New option "--statistics" for printing out program run times. This is intended
218 to be used with the gcc "-Q" option, which prints out times spent in various
219 phases of compilation. (You should be able to get all of them printed out with
220 "gcc -Q -Wa,--statistics", I think.)
222 ----------------------------------------------------------------
226 RS/6000 AIX and MIPS SGI Irix 5 support has been added.
228 Configurations that are still in development (and therefore are convenient to
229 have listed in configure.in) still get rejected without a minor change to
230 gas/Makefile.in, so people not doing development work shouldn't get the
231 impression that support for such configurations is actually believed to be
234 The program name (usually "as") is printed when a fatal error message is
235 displayed. This should prevent some confusion about the source of occasional
236 messages about "internal errors".
238 ELF support is falling into place. Support for the 386 should be working.
239 Support for SPARC Solaris is in. HPPA support from Utah is being integrated.
241 Symbol values are maintained as expressions instead of being immediately boiled
242 down to add-symbol, sub-symbol, and constant. This permits slightly more
243 complex calculations involving symbols whose values are not alreadey known.
245 DBX-style debugging info ("stabs") is now supported for COFF formats.
246 If any stabs directives are seen in the source, GAS will create two new
247 sections: a ".stab" and a ".stabstr" section. The format of the .stab
248 section is nearly identical to the a.out symbol format, and .stabstr is
249 its string table. For this to be useful, you must have configured GCC
250 to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB
251 that can use the stab sections (4.11 or later).
253 LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS
254 support is in progress.
256 ----------------------------------------------------------------
260 Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been
261 incorporated, but not well tested yet.
263 Altered the opcode table split for m68k; it should require less VM to compile
266 Some minor adjustments to add (Convergent Technologies') Miniframe support,
267 suggested by Ronald Cole.
269 HPPA support (running OSF only, not HPUX) has been contributed by Utah. This
270 includes improved ELF support, which I've started adapting for SPARC Solaris
271 2.x. Integration isn't completely, so it probably won't work.
273 HP9000/300 support, donated by HP, has been merged in.
275 Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support.
277 Better error messages for unsupported configurations (e.g., hppa-hpux).
279 Test suite framework is starting to become reasonable.
281 ----------------------------------------------------------------
287 Some more merging of BFD and ELF code, but ELF still doesn't work.
289 ----------------------------------------------------------------
293 BFD merge is partly done. Adventurous souls may try giving configure the
294 "--with-bfd-assembler" option. Currently, ELF format requires it, a.out format
295 accepts it; SPARC CPU accepts it. It's the default only for OS "elf" or
296 "solaris". (ELF isn't really supported yet. It needs work. I've got some
297 code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not fully
300 The 68K opcode table has been split in half. It should now compile under gcc
301 without consuming ridiculous amounts of memory.
303 A couple data structures have been reduced in size. This should result in
304 saving a little bit of space at runtime.
306 Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF
307 code provided ROSE format support, which I haven't merged in yet. (I can make
308 it available, if anyone wants to try it out.) Ralph's code, for BSD 4.4,
309 supports a.out format. We don't have ECOFF support in just yet; it's coming.
311 Support for the Hitachi H8/500 has been added.
313 VMS host and target support should be working now, thanks chiefly to Eric
316 ----------------------------------------------------------------
320 For m68k, support for more processors has been added: 68040, CPU32, 68851.
322 For i386, .align is now power-of-two; was number-of-bytes.
324 For m68k, "%" is now accepted before register names. For COFF format, which
325 doesn't use underscore prefixes for C labels, it is required, so variable "a0"
326 can be distinguished from the register.
328 Last public release was 1.38. Lots of configuration changes since then, lots
329 of new CPUs and formats, lots of bugs fixed.