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.
57 Texas Instruments c30 (tms320c30) support added.
59 The assembler now optimizes the exception frame information generated by egcs
60 and gcc 2.8. The new --traditional-format option disables this optimization.
62 Added --gstabs option to generate stabs debugging information.
64 The -a option takes a new suboption, m (e.g., -alm) to expand macros in a
67 Added -MD option to print dependencies.
75 Motorola ColdFire 5200 support added (configure for m68k and use -m5200).
77 Alpha/VMS support added.
79 m68k options --base-size-default-16, --base-size-default-32,
80 --disp-size-default-16, and --disp-size-default-32 added.
82 The alignment directives now take an optional third argument, which is the
83 maximum number of bytes to skip. If doing the alignment would require skipping
84 more than the given number of bytes, the alignment is not done at all.
86 The ELF assembler has a new pseudo-op, .symver, used for symbol versioning.
88 The -a option takes a new suboption, c (e.g., -alc), to skip false conditionals
91 Added new pseudo-op, .equiv; it's like .equ, except that it is an error if the
92 symbol is already defined.
96 The PowerPC assembler now allows the use of symbolic register names (r0, etc.)
97 if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.) can be
98 used any time. PowerPC 860 move to/from SPR instructions have been added.
100 Alpha Linux (ELF) support added.
102 PowerPC ELF support added.
104 m68k Linux (ELF) support added.
106 i960 Hx/Jx support added.
108 i386/PowerPC gnu-win32 support added.
110 SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the
111 default is to build COFF-only support. To get a set of tools that generate ELF
112 (they'll understand both COFF and ELF), you must configure with
113 target=i386-unknown-sco3.2v5elf.
115 m88k-motorola-sysv3* support added.
119 Gas now directly supports macros, without requiring GASP.
121 Gas now has an MRI assembler compatibility mode. Use -M or --mri to select MRI
122 mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the ``.mri
123 0'' is seen; this can be convenient for inline assembler code.
125 Added --defsym SYM=VALUE option.
127 Added -mips4 support to MIPS assembler.
129 Added PIC support to Solaris and SPARC SunOS 4 assembler.
133 Converted this directory to use an autoconf-generated configure script.
135 ARM support, from Richard Earnshaw.
137 Updated VMS support, from Pat Rankin, including considerably improved debugging
140 Support for the control registers in the 68060.
142 Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to
143 provide for possible future gcc changes, for targets where gas provides some
144 features not available in the native assembler. If the native assembler is
145 used, it should become obvious pretty quickly what the problem is.
147 Usage message is available with "--help".
149 The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3
150 also, but didn't get into the NEWS file.)
152 Weak symbol support for a.out.
154 A bug in the listing code which could cause an infinite loop has been fixed.
155 Bugs in listings when generating a COFF object file have also been fixed.
157 Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by Paul
160 Improved Alpha support. Immediate constants can have a much larger range now.
161 Support for the 21164 has been contributed by Digital.
163 Updated ns32k (pc532-mach, netbsd532) support from Ian Dall.
167 Mach i386 support, by David Mackenzie and Ken Raeburn.
169 RS/6000 and PowerPC support by Ian Taylor.
171 VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit,
172 based on mail received from various people. The `-h#' option should work again
175 HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work
176 with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special
177 version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve
178 this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu
179 in the "dist" directory.
181 Vax support in gas fixed for BSD, so it builds and seems to run a couple simple
182 tests okay. I haven't put it through extensive testing. (GNU make is
183 currently required for BSD 4.3 builds.)
185 Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is
186 based on code donated by CMU, which used an a.out-based format. I'm afraid the
187 alpha-a.out support is pretty badly mangled, and much of it removed; making it
188 work will require rewriting it as BFD support for the format anyways.
192 The test suites have been fixed up a bit, so that they should work with a
193 couple different versions of expect and dejagnu.
195 Symbols' values are now handled internally as expressions, permitting more
196 flexibility in evaluating them in some cases. Some details of relocation
197 handling have also changed, and simple constant pool management has been added,
198 to make the Alpha port easier.
200 New option "--statistics" for printing out program run times. This is intended
201 to be used with the gcc "-Q" option, which prints out times spent in various
202 phases of compilation. (You should be able to get all of them printed out with
203 "gcc -Q -Wa,--statistics", I think.)
205 ----------------------------------------------------------------
209 RS/6000 AIX and MIPS SGI Irix 5 support has been added.
211 Configurations that are still in development (and therefore are convenient to
212 have listed in configure.in) still get rejected without a minor change to
213 gas/Makefile.in, so people not doing development work shouldn't get the
214 impression that support for such configurations is actually believed to be
217 The program name (usually "as") is printed when a fatal error message is
218 displayed. This should prevent some confusion about the source of occasional
219 messages about "internal errors".
221 ELF support is falling into place. Support for the 386 should be working.
222 Support for SPARC Solaris is in. HPPA support from Utah is being integrated.
224 Symbol values are maintained as expressions instead of being immediately boiled
225 down to add-symbol, sub-symbol, and constant. This permits slightly more
226 complex calculations involving symbols whose values are not alreadey known.
228 DBX-style debugging info ("stabs") is now supported for COFF formats.
229 If any stabs directives are seen in the source, GAS will create two new
230 sections: a ".stab" and a ".stabstr" section. The format of the .stab
231 section is nearly identical to the a.out symbol format, and .stabstr is
232 its string table. For this to be useful, you must have configured GCC
233 to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB
234 that can use the stab sections (4.11 or later).
236 LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS
237 support is in progress.
239 ----------------------------------------------------------------
243 Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been
244 incorporated, but not well tested yet.
246 Altered the opcode table split for m68k; it should require less VM to compile
249 Some minor adjustments to add (Convergent Technologies') Miniframe support,
250 suggested by Ronald Cole.
252 HPPA support (running OSF only, not HPUX) has been contributed by Utah. This
253 includes improved ELF support, which I've started adapting for SPARC Solaris
254 2.x. Integration isn't completely, so it probably won't work.
256 HP9000/300 support, donated by HP, has been merged in.
258 Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support.
260 Better error messages for unsupported configurations (e.g., hppa-hpux).
262 Test suite framework is starting to become reasonable.
264 ----------------------------------------------------------------
270 Some more merging of BFD and ELF code, but ELF still doesn't work.
272 ----------------------------------------------------------------
276 BFD merge is partly done. Adventurous souls may try giving configure the
277 "--with-bfd-assembler" option. Currently, ELF format requires it, a.out format
278 accepts it; SPARC CPU accepts it. It's the default only for OS "elf" or
279 "solaris". (ELF isn't really supported yet. It needs work. I've got some
280 code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not fully
283 The 68K opcode table has been split in half. It should now compile under gcc
284 without consuming ridiculous amounts of memory.
286 A couple data structures have been reduced in size. This should result in
287 saving a little bit of space at runtime.
289 Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF
290 code provided ROSE format support, which I haven't merged in yet. (I can make
291 it available, if anyone wants to try it out.) Ralph's code, for BSD 4.4,
292 supports a.out format. We don't have ECOFF support in just yet; it's coming.
294 Support for the Hitachi H8/500 has been added.
296 VMS host and target support should be working now, thanks chiefly to Eric
299 ----------------------------------------------------------------
303 For m68k, support for more processors has been added: 68040, CPU32, 68851.
305 For i386, .align is now power-of-two; was number-of-bytes.
307 For m68k, "%" is now accepted before register names. For COFF format, which
308 doesn't use underscore prefixes for C labels, it is required, so variable "a0"
309 can be distinguished from the register.
311 Last public release was 1.38. Lots of configuration changes since then, lots
312 of new CPUs and formats, lots of bugs fixed.