* config/tc-i386.c (md_assemble): When swapping operands for
[deliverable/binutils-gdb.git] / gas / NEWS
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1-*- text -*-
2
3Changes in 2.10:
4
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5Support for numbers with suffixes.
6
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7Added support for breaking to the end of repeat loops.
8
9Added support for parallel instruction syntax (DOUBLEBAR_PARALLEL).
10
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11New .elseif pseudo-op added.
12
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13New --fatal-warnings option.
14
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17Motorola MCore 210 processor support added.
18
19A new pseudo-op .intel_syntax has been implemented to allow gas to parse i386
20assembly programs with intel syntax.
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21
22New pseudo-ops .func,.endfunc to aid in debugging user-written assembler code.
23
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24Added -gdwarf2 option to generate DWARF 2 debugging information.
25
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26Full 16-bit mode support for i386.
27
28Greatly improved instruction operand checking for i386. This change will
29produce errors or warnings on incorrect assembly code that previous versions of
30gas accepted. If you get unexpected messages from code that worked with older
31versions of gas, please double check the code before reporting a bug.
32
33Weak symbol support added for COFF targets.
34
35Mitsubishi D30V support added.
36
37Texas Instruments c80 (tms320c80) support added.
38
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39i960 ELF support added.
40
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41Changes in 2.9:
42
43Texas Instruments c30 (tms320c30) support added.
44
45The assembler now optimizes the exception frame information generated by egcs
46and gcc 2.8. The new --traditional-format option disables this optimization.
47
48Added --gstabs option to generate stabs debugging information.
49
50The -a option takes a new suboption, m (e.g., -alm) to expand macros in a
51listing.
52
53Added -MD option to print dependencies.
54
55Changes in 2.8:
56
57BeOS support added.
58
59MIPS16 support added.
60
61Motorola ColdFire 5200 support added (configure for m68k and use -m5200).
62
63Alpha/VMS support added.
64
65m68k options --base-size-default-16, --base-size-default-32,
66--disp-size-default-16, and --disp-size-default-32 added.
67
68The alignment directives now take an optional third argument, which is the
69maximum number of bytes to skip. If doing the alignment would require skipping
70more than the given number of bytes, the alignment is not done at all.
71
72The ELF assembler has a new pseudo-op, .symver, used for symbol versioning.
73
74The -a option takes a new suboption, c (e.g., -alc), to skip false conditionals
75in listings.
76
77Added new pseudo-op, .equiv; it's like .equ, except that it is an error if the
78symbol is already defined.
79
80Changes in 2.7:
81
82The PowerPC assembler now allows the use of symbolic register names (r0, etc.)
83if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.) can be
84used any time. PowerPC 860 move to/from SPR instructions have been added.
85
86Alpha Linux (ELF) support added.
87
88PowerPC ELF support added.
89
90m68k Linux (ELF) support added.
91
92i960 Hx/Jx support added.
93
94i386/PowerPC gnu-win32 support added.
95
96SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the
97default is to build COFF-only support. To get a set of tools that generate ELF
98(they'll understand both COFF and ELF), you must configure with
99target=i386-unknown-sco3.2v5elf.
100
101m88k-motorola-sysv3* support added.
102
103Changes in 2.6:
104
105Gas now directly supports macros, without requiring GASP.
106
107Gas now has an MRI assembler compatibility mode. Use -M or --mri to select MRI
108mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the ``.mri
1090'' is seen; this can be convenient for inline assembler code.
110
111Added --defsym SYM=VALUE option.
112
113Added -mips4 support to MIPS assembler.
114
115Added PIC support to Solaris and SPARC SunOS 4 assembler.
116
117Changes in 2.4:
118
119Converted this directory to use an autoconf-generated configure script.
120
121ARM support, from Richard Earnshaw.
122
123Updated VMS support, from Pat Rankin, including considerably improved debugging
124support.
125
126Support for the control registers in the 68060.
127
128Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to
129provide for possible future gcc changes, for targets where gas provides some
130features not available in the native assembler. If the native assembler is
131used, it should become obvious pretty quickly what the problem is.
132
133Usage message is available with "--help".
134
135The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3
136also, but didn't get into the NEWS file.)
137
138Weak symbol support for a.out.
139
140A bug in the listing code which could cause an infinite loop has been fixed.
141Bugs in listings when generating a COFF object file have also been fixed.
142
143Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by Paul
144Kranenburg.
145
146Improved Alpha support. Immediate constants can have a much larger range now.
147Support for the 21164 has been contributed by Digital.
148
149Updated ns32k (pc532-mach, netbsd532) support from Ian Dall.
150
151Changes in 2.3:
152
153Mach i386 support, by David Mackenzie and Ken Raeburn.
154
155RS/6000 and PowerPC support by Ian Taylor.
156
157VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit,
158based on mail received from various people. The `-h#' option should work again
159too.
160
161HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work
162with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special
163version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve
164this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu
165in the "dist" directory.
166
167Vax support in gas fixed for BSD, so it builds and seems to run a couple simple
168tests okay. I haven't put it through extensive testing. (GNU make is
169currently required for BSD 4.3 builds.)
170
171Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is
172based on code donated by CMU, which used an a.out-based format. I'm afraid the
173alpha-a.out support is pretty badly mangled, and much of it removed; making it
174work will require rewriting it as BFD support for the format anyways.
175
176Irix 5 support.
177
178The test suites have been fixed up a bit, so that they should work with a
179couple different versions of expect and dejagnu.
180
181Symbols' values are now handled internally as expressions, permitting more
182flexibility in evaluating them in some cases. Some details of relocation
183handling have also changed, and simple constant pool management has been added,
184to make the Alpha port easier.
185
186New option "--statistics" for printing out program run times. This is intended
187to be used with the gcc "-Q" option, which prints out times spent in various
188phases of compilation. (You should be able to get all of them printed out with
189"gcc -Q -Wa,--statistics", I think.)
190
191----------------------------------------------------------------
192
193Changes in 2.2:
194
195RS/6000 AIX and MIPS SGI Irix 5 support has been added.
196
197Configurations that are still in development (and therefore are convenient to
198have listed in configure.in) still get rejected without a minor change to
199gas/Makefile.in, so people not doing development work shouldn't get the
200impression that support for such configurations is actually believed to be
201reliable.
202
203The program name (usually "as") is printed when a fatal error message is
204displayed. This should prevent some confusion about the source of occasional
205messages about "internal errors".
206
207ELF support is falling into place. Support for the 386 should be working.
208Support for SPARC Solaris is in. HPPA support from Utah is being integrated.
209
210Symbol values are maintained as expressions instead of being immediately boiled
211down to add-symbol, sub-symbol, and constant. This permits slightly more
212complex calculations involving symbols whose values are not alreadey known.
213
214DBX-style debugging info ("stabs") is now supported for COFF formats.
215If any stabs directives are seen in the source, GAS will create two new
216sections: a ".stab" and a ".stabstr" section. The format of the .stab
217section is nearly identical to the a.out symbol format, and .stabstr is
218its string table. For this to be useful, you must have configured GCC
219to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB
220that can use the stab sections (4.11 or later).
221
222LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS
223support is in progress.
224
225----------------------------------------------------------------
226
227Changes in 2.1:
228
229Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been
230incorporated, but not well tested yet.
231
232Altered the opcode table split for m68k; it should require less VM to compile
233with gcc now.
234
235Some minor adjustments to add (Convergent Technologies') Miniframe support,
236suggested by Ronald Cole.
237
238HPPA support (running OSF only, not HPUX) has been contributed by Utah. This
239includes improved ELF support, which I've started adapting for SPARC Solaris
2402.x. Integration isn't completely, so it probably won't work.
241
242HP9000/300 support, donated by HP, has been merged in.
243
244Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support.
245
246Better error messages for unsupported configurations (e.g., hppa-hpux).
247
248Test suite framework is starting to become reasonable.
249
250----------------------------------------------------------------
251
252Changes in 2.0:
253
254Mostly bug fixes.
255
256Some more merging of BFD and ELF code, but ELF still doesn't work.
257
258----------------------------------------------------------------
259
260Changes in 1.94:
261
262BFD merge is partly done. Adventurous souls may try giving configure the
263"--with-bfd-assembler" option. Currently, ELF format requires it, a.out format
264accepts it; SPARC CPU accepts it. It's the default only for OS "elf" or
265"solaris". (ELF isn't really supported yet. It needs work. I've got some
266code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not fully
267merged yet.)
268
269The 68K opcode table has been split in half. It should now compile under gcc
270without consuming ridiculous amounts of memory.
271
272A couple data structures have been reduced in size. This should result in
273saving a little bit of space at runtime.
274
275Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF
276code provided ROSE format support, which I haven't merged in yet. (I can make
277it available, if anyone wants to try it out.) Ralph's code, for BSD 4.4,
278supports a.out format. We don't have ECOFF support in just yet; it's coming.
279
280Support for the Hitachi H8/500 has been added.
281
282VMS host and target support should be working now, thanks chiefly to Eric
283Youngdale.
284
285----------------------------------------------------------------
286
287Changes in 1.93.01:
288
289For m68k, support for more processors has been added: 68040, CPU32, 68851.
290
291For i386, .align is now power-of-two; was number-of-bytes.
292
293For m68k, "%" is now accepted before register names. For COFF format, which
294doesn't use underscore prefixes for C labels, it is required, so variable "a0"
295can be distinguished from the register.
296
297Last public release was 1.38. Lots of configuration changes since then, lots
298of new CPUs and formats, lots of bugs fixed.
299
300\f
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