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252b5132 1-*- text -*-
96a84ea3 2
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3Changes in 2.33:
4
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MM
5* Add support for the Arm Scalable Vector Extension version 2 (SVE2)
6 instructions.
7
8* Add support for the Arm Transactional Memory Extension (TME)
9 instructions.
10
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AV
11* Add support for the Armv8.1-M Mainline and M-profile Vector Extension (MVE)
12 instructions.
13
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14* For MIPS, Add -m[no-]fix-loongson3-llsc option to fix (or not) Loongson3
15 LLSC Errata. Add a --enable-mips-fix-loongson3-llsc=[yes|no] configure
16 time option to set the default behavior. Set the default if the configure
17 option is not used to "no".
6f2117ba 18
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DZ
19* Add support for the Arm Cortex-A76AE, Cortex-A77 and Cortex-M35P
20 processors.
21
22* Add support for the AArch64 Cortex-A34, Cortex-A65, Cortex-A65AE,
23 Cortex-A76AE, and Cortex-A77 processors.
24
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25* Add .float16 directive for both Arm and AArch64 to allow encoding of 16-bit
26 floating point literals. Add .float16_format directive and
27 -mfp16-format=[ieee|alternative] option for Arm to control the format of the
28 encoding.
29
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NC
30Changes in 2.32:
31
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32* Add -mvexwig=[0|1] option to x86 assembler to control encoding of
33 VEX.W-ignored (WIG) VEX instructions.
34
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35* Add -mx86-used-note=[yes|no] option to generate (or not) x86 GNU property
36 notes. Add a --enable-x86-used-note configure time option to set the
37 default behavior. Set the default if the configure option is not used
38 to "no".
39
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40* Add support for the MIPS Loongson EXTensions R2 (EXT2) instructions.
41
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42* Add support for the MIPS Loongson EXTensions (EXT) instructions.
43
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44* Add support for the MIPS Loongson Content Address Memory (CAM) ASE.
45
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AJ
46* Add support for the C-SKY processor series.
47
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48* Add support for the MIPS Loongson MultiMedia extensions Instructions (MMI)
49 ASE.
50
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51Changes in 2.31:
52
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53* The ADR and ADRL pseudo-instructions supported by the ARM assembler
54 now only set the bottom bit of the address of thumb function symbols
55 if the -mthumb-interwork command line option is active.
56
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57* Add support for the MIPS Global INValidate (GINV) ASE.
58
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SE
59* Add support for the MIPS Cyclic Redudancy Check (CRC) ASE.
60
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JD
61* Add support for the Freescale S12Z architecture.
62
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NC
63* Add --generate-missing-build-notes=[yes|no] option to create (or not) GNU
64 Build Attribute notes if none are present in the input sources. Add a
65 --enable-generate-build-notes=[yes|no] configure time option to set the
66 default behaviour. Set the default if the configure option is not used
67 to "no".
68
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L
69* Remove -mold-gcc command-line option for x86 targets.
70
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L
71* Add -O[2|s] command-line options to x86 assembler to enable alternate
72 shorter instruction encoding.
73
8f065d3b 74* Add support for .nops directive. It is currently supported only for
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75 x86 targets.
76
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NC
77Changes in 2.30:
78
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AO
79* Add support for loaction views in DWARF debug line information.
80
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81Changes in 2.29:
82
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L
83* Add support for ELF SHF_GNU_MBIND.
84
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85* Add support for the WebAssembly file format and wasm32 ELF conversion.
86
7e0de605 87* PowerPC gas now checks that the correct register class is used in
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88 instructions. For instance, "addi %f4,%cr3,%r31" warns three times
89 that the registers are invalid.
7e0de605 90
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91* Add support for the Texas Instruments PRU processor.
92
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TP
93* Support for the ARMv8-R architecture and Cortex-R52 processor has been
94 added to the ARM port.
ced40572 95
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TG
96Changes in 2.28:
97
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98* Add support for the RISC-V architecture.
99
b19ea8d2 100* Add support for the ARM Cortex-M23 and Cortex-M33 processors.
ce1b0a45 101
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TG
102Changes in 2.27:
103
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104* Default to --enable-compressed-debug-sections=gas for Linux/x86 targets.
105
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106* Add --no-pad-sections to stop the assembler from padding the end of output
107 sections up to their alignment boundary.
108
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109* Support for the ARMv8-M architecture has been added to the ARM port. Support
110 for the ARMv8-M Security and DSP Extensions has also been added to the ARM
111 port.
112
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113* ARC backend accepts .extInstruction, .extCondCode, .extAuxRegister, and
114 .extCoreRegister pseudo-ops that allow an user to define custom
115 instructions, conditional codes, auxiliary and core registers.
116
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117* Add a configure option --enable-elf-stt-common to decide whether ELF
118 assembler should generate common symbols with the STT_COMMON type by
119 default. Default to no.
120
a05a5b64 121* New command-line option --elf-stt-common= for ELF targets to control
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122 whether to generate common symbols with the STT_COMMON type.
123
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124* Add ability to set section flags and types via numeric values for ELF
125 based targets.
81c23f82 126
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127* Add a configure option --enable-x86-relax-relocations to decide whether
128 x86 assembler should generate relax relocations by default. Default to
129 yes, except for x86 Solaris targets older than Solaris 12.
130
a05a5b64 131* New command-line option -mrelax-relocations= for x86 target to control
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132 whether to generate relax relocations.
133
a05a5b64 134* New command-line option -mfence-as-lock-add=yes for x86 target to encode
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135 lfence, mfence and sfence as "lock addl $0x0, (%[re]sp)".
136
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137* Add assembly-time relaxation option for ARC cpus.
138
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139* Add --with-cpu=TYPE configure option for ARC gas. This allows the default
140 cpu type to be adjusted at configure time.
141
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142Changes in 2.26:
143
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L
144* Add a configure option --enable-compressed-debug-sections={all,gas} to
145 decide whether DWARF debug sections should be compressed by default.
e12fe555 146
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147* Add support for the ARC EM/HS, and ARC600/700 architectures. Remove
148 assembler support for Argonaut RISC architectures.
149
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150* Symbol and label names can now be enclosed in double quotes (") which allows
151 them to contain characters that are not part of valid symbol names in high
152 level languages.
153
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154* Added the correctly spelled -march=armv6kz, for ARMv6KZ support. The
155 previous spelling, -march=armv6zk, is still accepted.
156
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157* Support for the ARMv8.1 architecture has been added to the Aarch64 port.
158 Support for the individual ARMv8.1 Adv.SIMD, LOR and PAN architecture
159 extensions has also been added to the Aarch64 port.
160
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161* Support for the ARMv8.1 architecture has been added to the ARM port. Support
162 for the individual ARMv8.1 Adv.SIMD and PAN architecture extensions has also
163 been added to the ARM port.
164
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165* Extend --compress-debug-sections option to support
166 --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi] for ELF
167 targets.
168
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169* --compress-debug-sections is turned on for Linux/x86 by default.
170
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TG
171Changes in 2.25:
172
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173* Add support for the AVR Tiny microcontrollers.
174
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175* Replace support for openrisc and or32 with support for or1k.
176
2e6976a8 177* Enhanced the ARM port to accept the assembler output from the CodeComposer
a05a5b64 178 Studio tool. Support is enabled via the new command-line option -mccs.
2e6976a8 179
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180* Add support for the Andes NDS32.
181
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TG
182Changes in 2.24:
183
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NC
184* Add support for the Texas Instruments MSP430X processor.
185
a05a5b64 186* Add -gdwarf-sections command-line option to enable per-code-section
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187 generation of DWARF .debug_line sections.
188
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189* Add support for Altera Nios II.
190
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191* Add support for the Imagination Technologies Meta processor.
192
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193* Add support for the v850e3v5.
194
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195* Remove assembler support for MIPS ECOFF targets.
196
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TG
197Changes in 2.23:
198
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NC
199* Add support for the 64-bit ARM architecture: AArch64.
200
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201* Add support for S12X processor.
202
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JL
203* Add support for the VLE extension to the PowerPC architecture.
204
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205* Add support for the Freescale XGATE architecture.
206
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207* Add support for .bundle_align_mode, .bundle_lock, and .bundle_unlock
208 directives. These are currently available only for x86 and ARM targets.
209
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210* Add support for the Renesas RL78 architecture.
211
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NC
212* Add support for the Adapteva EPIPHANY architecture.
213
fe13e45b 214* For x86, allow 'rep bsf', 'rep bsr', and 'rep ret' syntax.
29c048b6 215
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TG
216Changes in 2.22:
217
69f56ae1 218* Add support for the Tilera TILEPro and TILE-Gx architectures.
44f45767 219
90b3661c 220Changes in 2.21:
44f45767 221
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L
222* Gas no longer requires doubling of ampersands in macros.
223
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JM
224* Add support for the TMS320C6000 (TI C6X) processor family.
225
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DK
226* GAS now understands an extended syntax in the .section directive flags
227 for COFF targets that allows the section's alignment to be specified. This
228 feature has also been backported to the 2.20 release series, starting with
229 2.20.1.
230
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231* Add support for the Renesas RX processor.
232
a05a5b64 233* New command-line option, --compress-debug-sections, which requests
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234 compression of DWARF debug information sections in the relocatable output
235 file. Compressed debug sections are supported by readelf, objdump, and
236 gold, but not currently by Gnu ld.
237
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238Changes in 2.20:
239
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240* Added support for v850e2 and v850e2v3.
241
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NC
242* GNU/Linux targets now supports "gnu_unique_object" as a value in the .type
243 pseudo op. It marks the symbol as being globally unique in the entire
244 process.
245
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246* ARM assembler now supports .inst[.nw] pseudo-ops to insert opcodes specified
247 in binary rather than text.
6e33da12 248
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249* Add support for common symbol alignment to PE formats.
250
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CC
251* Add support for the new discriminator column in the DWARF line table,
252 with a discriminator operand for the .loc directive.
253
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254* Add support for Sunplus score architecture.
255
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NC
256* The .type pseudo-op now accepts a type of STT_GNU_IFUNC which can be used to
257 indicate that if the symbol is the target of a relocation, its value should
258 not be use. Instead the function should be invoked and its result used as
259 the value.
fa94de6b 260
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261* Add support for Lattice Mico32 (lm32) architecture.
262
fa94de6b 263* Add support for Xilinx MicroBlaze architecture.
caa03924 264
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TG
265Changes in 2.19:
266
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267* New pseudo op .cfi_val_encoded_addr, to record constant addresses in unwind
268 tables without runtime relocation.
269
a05a5b64 270* New command-line option, -h-tick-hex, for sh, m32c, and h8/300 targets, which
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271 adds compatibility with H'00 style hex constants.
272
a05a5b64 273* New command-line option, -msse-check=[none|error|warning], for x86
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274 targets.
275
a05a5b64 276* New sub-option added to the assembler's -a command-line switch to
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277 generate a listing output. The 'g' sub-option will insert into the listing
278 various information about the assembly, such as assembler version, the
a05a5b64 279 command-line options used, and a time stamp.
83f10cb2 280
a05a5b64 281* New command-line option -msse2avx for x86 target to encode SSE
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282 instructions with VEX prefix.
283
f1f8f695 284* Add Intel XSAVE, EPT, MOVBE, AES, PCLMUL, AVX/FMA support for x86 target.
c0f3af97 285
a05a5b64 286* New command-line options, -march=CPU[,+EXTENSION...], -mtune=CPU,
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287 -mmnemonic=[att|intel], -msyntax=[att|intel], -mindex-reg,
288 -mnaked-reg and -mold-gcc, for x86 targets.
289
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290* Support for generating wide character strings has been added via the new
291 pseudo ops: .string16, .string32 and .string64.
292
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293* Support for SSE5 has been added to the i386 port.
294
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295Changes in 2.18:
296
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297* The GAS sources are now released under the GPLv3.
298
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299* Support for the National Semiconductor CR16 target has been added.
300
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AM
301* Added gas .reloc pseudo. This is a low-level interface for creating
302 relocations.
303
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304* Add support for x86_64 PE+ target.
305
1c0d3aa6 306* Add support for Score target.
83518699 307
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308Changes in 2.17:
309
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310* Support for the Infineon XC16X has been added by KPIT Cummins Infosystems.
311
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312* Support for ms2 architecture has been added.
313
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314* Support for the Z80 processor family has been added.
315
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316* Add support for the "@<file>" syntax to the command line, so that extra
317 switches can be read from <file>.
318
a05a5b64 319* The SH target supports a new command-line switch --enable-reg-prefix which,
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320 if enabled, will allow register names to be optionally prefixed with a $
321 character. This allows register names to be distinguished from label names.
fa94de6b 322
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323* Macros with a variable number of arguments are now supported. See the
324 documentation for how this works.
325
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NC
326* Added --reduce-memory-overheads switch to reduce the size of the hash
327 tables used, at the expense of longer assembly times, and
328 --hash-size=<NUMBER> to set the size of the hash tables used by gas.
329
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330* Macro names and macro parameter names can now be any identifier that would
331 also be legal as a symbol elsewhere. For macro parameter names, this is
332 known to cause problems in certain sources when the respective target uses
333 characters inconsistently, and thus macro parameter references may no longer
334 be recognized as such (see the documentation for details).
fa94de6b 335
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NC
336* Support the .f_floating, .d_floating, .g_floating and .h_floating directives
337 for the VAX target in order to be more compatible with the VAX MACRO
338 assembler.
339
a05a5b64 340* New command-line option -mtune=[itanium1|itanium2] for IA64 targets.
8c2fda1d 341
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NC
342Changes in 2.16:
343
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344* Redefinition of macros now results in an error.
345
a05a5b64 346* New command-line option -mhint.b=[ok|warning|error] for IA64 targets.
91d777ee 347
a05a5b64 348* New command-line option -munwind-check=[warning|error] for IA64
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349 targets.
350
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351* The IA64 port now uses automatic dependency violation removal as its default
352 mode.
353
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354* Port to MAXQ processor contributed by HCL Tech.
355
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NC
356* Added support for generating unwind tables for ARM ELF targets.
357
a05a5b64 358* Add a -g command-line option to generate debug information in the target's
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359 preferred debug format.
360
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361* Support for the crx-elf target added.
362
1a320fbb 363* Support for the sh-symbianelf target added.
1fe1f39c 364
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BF
365* Added a pseudo-op (.secrel32) to generate 32 bit section relative relocations
366 on pe[i]-i386; required for this target's DWARF 2 support.
367
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NC
368* Support for Motorola MCF521x/5249/547x/548x added.
369
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NC
370* Support for ColdFire EMAC instructions added and Motorola syntax for MAC/EMAC
371 instrucitons.
372
a05a5b64 373* New command-line option -mno-shared for MIPS ELF targets.
aa6975fb 374
a05a5b64 375* New command-line option --alternate and pseudo-ops .altmacro and .noaltmacro
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376 added to enter (and leave) alternate macro syntax mode.
377
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NC
378Changes in 2.15:
379
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380* The MIPS -membedded-pic option (Embedded-PIC code generation) is
381 deprecated and will be removed in a future release.
382
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NC
383* Added PIC m32r Linux (ELF) and support to M32R assembler.
384
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385* Added support for ARM V6.
386
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387* Added support for sh4a and variants.
388
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NC
389* Support for Renesas M32R2 added.
390
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391* Limited support for Mapping Symbols as specified in the ARM ELF
392 specification has been added to the arm assembler.
ed769ec1 393
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NC
394* On ARM architectures, added a new gas directive ".unreq" that undoes
395 definitions created by ".req".
396
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NC
397* Support for Motorola ColdFire MCF528x added.
398
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NC
399* Added --gstabs+ switch to enable the generation of STABS debug format
400 information with GNU extensions.
fa94de6b 401
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CD
402* Added support for MIPS64 Release 2.
403
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NC
404* Added support for v850e1.
405
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L
406* Added -n switch for x86 assembler. By default, x86 GAS replaces
407 multiple nop instructions used for alignment within code sections
408 with multi-byte nop instructions such as leal 0(%esi,1),%esi. This
409 switch disables the optimization.
410
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411* Removed -n option from MIPS assembler. It was not useful, and confused the
412 existing -non_shared option.
413
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CD
414Changes in 2.14:
415
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CD
416* Added support for MIPS32 Release 2.
417
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NC
418* Added support for Xtensa architecture.
419
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NC
420* Support for Intel's iWMMXt processor (an ARM variant) added.
421
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NC
422* An assembler test generator has been contributed and an example file that
423 uses it (gas/testsuite/gas/all/test-gen.c and test-exmaple.c).
fa94de6b 424
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NC
425* Support for SH2E added.
426
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NC
427* GASP has now been removed.
428
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NC
429* Support for Texas Instruments TMS320C4x and TMS320C3x series of
430 DSP's contributed by Michael Hayes and Svein E. Seldal.
fa94de6b 431
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NC
432* Support for the Ubicom IP2xxx microcontroller added.
433
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NC
434Changes in 2.13:
435
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NC
436* Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400
437 and FR500 included.
0ebb9a87 438
a40cbfa3 439* Support for DLX processor added.
52216602 440
a40cbfa3
NC
441* GASP has now been deprecated and will be removed in a future release. Use
442 the macro facilities in GAS instead.
3f965e60 443
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NC
444* GASP now correctly parses floating point numbers. Unless the base is
445 explicitly specified, they are interpreted as decimal numbers regardless of
446 the currently specified base.
1ac57253 447
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NC
448Changes in 2.12:
449
a40cbfa3 450* Support for Don Knuth's MMIX, by Hans-Peter Nilsson.
49fda6c8 451
a40cbfa3 452* Support for the OpenRISC 32-bit embedded processor by OpenCores.
3b16e843 453
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RM
454* The ARM assembler now accepts -march=..., -mcpu=... and -mfpu=... for
455 specifying the target instruction set. The old method of specifying the
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NC
456 target processor has been deprecated, but is still accepted for
457 compatibility.
03b1477f 458
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NC
459* Support for the VFP floating-point instruction set has been added to
460 the ARM assembler.
252b5132 461
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NC
462* New psuedo op: .incbin to include a set of binary data at a given point
463 in the assembly. Contributed by Anders Norlander.
7e005732 464
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NC
465* The MIPS assembler now accepts -march/-mtune. -mcpu has been deprecated
466 but still works for compatability.
ec68c924 467
fa94de6b 468* The MIPS assembler no longer issues a warning by default when it
a05a5b64 469 generates a nop instruction from a macro. The new command-line option
a40cbfa3 470 -n will turn on the warning.
63486801 471
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JW
472Changes in 2.11:
473
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NC
474* Support for PDP-11 and 2.11BSD a.out format, by Lars Brinkhoff.
475
a40cbfa3 476* x86 gas now supports the full Pentium4 instruction set.
a167610d 477
a40cbfa3 478* Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs.
c0d8940f 479
a40cbfa3 480* Support for Motorola 68HC11 and 68HC12.
df86943d 481
a40cbfa3 482* Support for Texas Instruments TMS320C54x (tic54x).
39bec121 483
a40cbfa3 484* Support for IA-64.
2dac7317 485
a40cbfa3 486* Support for i860, by Jason Eckhardt.
22b36938 487
a40cbfa3 488* Support for CRIS (Axis Communications ETRAX series).
5bcac8a4 489
a40cbfa3 490* x86 gas has a new .arch pseudo op to specify the target CPU architecture.
a38cf1db 491
a05a5b64 492* x86 gas -q command-line option quietens warnings about register size changes
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NC
493 due to suffix, indirect jmp/call without `*', stand-alone prefixes, and
494 translating various deprecated floating point instructions.
a38cf1db 495
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RH
496Changes in 2.10:
497
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NC
498* Support for the ARM msr instruction was changed to only allow an immediate
499 operand when altering the flags field.
d14442f4 500
a40cbfa3 501* Support for ATMEL AVR.
adde6300 502
a40cbfa3 503* Support for IBM 370 ELF. Somewhat experimental.
b5ebe70e 504
a40cbfa3 505* Support for numbers with suffixes.
3fd9f047 506
a40cbfa3 507* Added support for breaking to the end of repeat loops.
6a6987a9 508
a40cbfa3 509* Added support for parallel instruction syntax (DOUBLEBAR_PARALLEL).
6a6987a9 510
a40cbfa3 511* New .elseif pseudo-op added.
3fd9f047 512
a40cbfa3 513* New --fatal-warnings option.
1f776aa5 514
a40cbfa3 515* picoJava architecture support added.
252b5132 516
a40cbfa3 517* Motorola MCore 210 processor support added.
041dd5a9 518
fa94de6b 519* A new pseudo-op .intel_syntax has been implemented to allow gas to parse i386
a40cbfa3 520 assembly programs with intel syntax.
252b5132 521
a40cbfa3 522* New pseudo-ops .func,.endfunc to aid in debugging user-written assembler code.
252b5132 523
a40cbfa3 524* Added -gdwarf2 option to generate DWARF 2 debugging information.
041dd5a9 525
a40cbfa3 526* Full 16-bit mode support for i386.
252b5132 527
fa94de6b 528* Greatly improved instruction operand checking for i386. This change will
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529 produce errors or warnings on incorrect assembly code that previous versions
530 of gas accepted. If you get unexpected messages from code that worked with
531 older versions of gas, please double check the code before reporting a bug.
252b5132 532
a40cbfa3 533* Weak symbol support added for COFF targets.
252b5132 534
a40cbfa3 535* Mitsubishi D30V support added.
252b5132 536
a40cbfa3 537* Texas Instruments c80 (tms320c80) support added.
252b5132 538
a40cbfa3 539* i960 ELF support added.
bedf545c 540
a40cbfa3 541* ARM ELF support added.
a057431b 542
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543Changes in 2.9:
544
a40cbfa3 545* Texas Instruments c30 (tms320c30) support added.
252b5132 546
fa94de6b 547* The assembler now optimizes the exception frame information generated by egcs
a40cbfa3 548 and gcc 2.8. The new --traditional-format option disables this optimization.
252b5132 549
a40cbfa3 550* Added --gstabs option to generate stabs debugging information.
252b5132 551
fa94de6b 552* The -a option takes a new suboption, m (e.g., -alm) to expand macros in a
a40cbfa3 553 listing.
252b5132 554
a40cbfa3 555* Added -MD option to print dependencies.
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556
557Changes in 2.8:
558
a40cbfa3 559* BeOS support added.
252b5132 560
a40cbfa3 561* MIPS16 support added.
252b5132 562
a40cbfa3 563* Motorola ColdFire 5200 support added (configure for m68k and use -m5200).
252b5132 564
a40cbfa3 565* Alpha/VMS support added.
252b5132 566
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567* m68k options --base-size-default-16, --base-size-default-32,
568 --disp-size-default-16, and --disp-size-default-32 added.
252b5132 569
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570* The alignment directives now take an optional third argument, which is the
571 maximum number of bytes to skip. If doing the alignment would require
572 skipping more than the given number of bytes, the alignment is not done at
573 all.
252b5132 574
a40cbfa3 575* The ELF assembler has a new pseudo-op, .symver, used for symbol versioning.
252b5132 576
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577* The -a option takes a new suboption, c (e.g., -alc), to skip false
578 conditionals in listings.
252b5132 579
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580* Added new pseudo-op, .equiv; it's like .equ, except that it is an error if
581 the symbol is already defined.
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582
583Changes in 2.7:
584
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585* The PowerPC assembler now allows the use of symbolic register names (r0,
586 etc.) if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.)
587 can be used any time. PowerPC 860 move to/from SPR instructions have been
588 added.
252b5132 589
a40cbfa3 590* Alpha Linux (ELF) support added.
252b5132 591
a40cbfa3 592* PowerPC ELF support added.
252b5132 593
a40cbfa3 594* m68k Linux (ELF) support added.
252b5132 595
a40cbfa3 596* i960 Hx/Jx support added.
252b5132 597
a40cbfa3 598* i386/PowerPC gnu-win32 support added.
252b5132 599
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600* SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the
601 default is to build COFF-only support. To get a set of tools that generate
fa94de6b 602 ELF (they'll understand both COFF and ELF), you must configure with
a40cbfa3 603 target=i386-unknown-sco3.2v5elf.
252b5132 604
a40cbfa3 605* m88k-motorola-sysv3* support added.
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606
607Changes in 2.6:
608
a40cbfa3 609* Gas now directly supports macros, without requiring GASP.
252b5132 610
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611* Gas now has an MRI assembler compatibility mode. Use -M or --mri to select
612 MRI mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the
613 ``.mri 0'' is seen; this can be convenient for inline assembler code.
252b5132 614
a40cbfa3 615* Added --defsym SYM=VALUE option.
252b5132 616
a40cbfa3 617* Added -mips4 support to MIPS assembler.
252b5132 618
a40cbfa3 619* Added PIC support to Solaris and SPARC SunOS 4 assembler.
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620
621Changes in 2.4:
622
a40cbfa3 623* Converted this directory to use an autoconf-generated configure script.
252b5132 624
a40cbfa3 625* ARM support, from Richard Earnshaw.
252b5132 626
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627* Updated VMS support, from Pat Rankin, including considerably improved
628 debugging support.
252b5132 629
a40cbfa3 630* Support for the control registers in the 68060.
252b5132 631
a40cbfa3 632* Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to
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633 provide for possible future gcc changes, for targets where gas provides some
634 features not available in the native assembler. If the native assembler is
a40cbfa3 635 used, it should become obvious pretty quickly what the problem is.
252b5132 636
a40cbfa3 637* Usage message is available with "--help".
252b5132 638
fa94de6b 639* The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3
a40cbfa3 640 also, but didn't get into the NEWS file.)
252b5132 641
a40cbfa3 642* Weak symbol support for a.out.
252b5132 643
fa94de6b 644* A bug in the listing code which could cause an infinite loop has been fixed.
a40cbfa3 645 Bugs in listings when generating a COFF object file have also been fixed.
252b5132 646
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647* Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by
648 Paul Kranenburg.
252b5132 649
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650* Improved Alpha support. Immediate constants can have a much larger range
651 now. Support for the 21164 has been contributed by Digital.
252b5132 652
a40cbfa3 653* Updated ns32k (pc532-mach, netbsd532) support from Ian Dall.
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654
655Changes in 2.3:
656
a40cbfa3 657* Mach i386 support, by David Mackenzie and Ken Raeburn.
252b5132 658
a40cbfa3 659* RS/6000 and PowerPC support by Ian Taylor.
252b5132 660
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661* VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit,
662 based on mail received from various people. The `-h#' option should work
663 again too.
252b5132 664
a40cbfa3 665* HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work
fa94de6b 666 with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special
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667 version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve
668 this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu
669 in the "dist" directory.
252b5132 670
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671* Vax support in gas fixed for BSD, so it builds and seems to run a couple
672 simple tests okay. I haven't put it through extensive testing. (GNU make is
673 currently required for BSD 4.3 builds.)
252b5132 674
fa94de6b 675* Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is
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676 based on code donated by CMU, which used an a.out-based format. I'm afraid
677 the alpha-a.out support is pretty badly mangled, and much of it removed;
678 making it work will require rewriting it as BFD support for the format anyways.
252b5132 679
a40cbfa3 680* Irix 5 support.
252b5132 681
fa94de6b 682* The test suites have been fixed up a bit, so that they should work with a
a40cbfa3 683 couple different versions of expect and dejagnu.
252b5132 684
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685* Symbols' values are now handled internally as expressions, permitting more
686 flexibility in evaluating them in some cases. Some details of relocation
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687 handling have also changed, and simple constant pool management has been
688 added, to make the Alpha port easier.
252b5132 689
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690* New option "--statistics" for printing out program run times. This is
691 intended to be used with the gcc "-Q" option, which prints out times spent in
692 various phases of compilation. (You should be able to get all of them
693 printed out with "gcc -Q -Wa,--statistics", I think.)
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694
695Changes in 2.2:
696
a40cbfa3 697* RS/6000 AIX and MIPS SGI Irix 5 support has been added.
252b5132 698
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699* Configurations that are still in development (and therefore are convenient to
700 have listed in configure.in) still get rejected without a minor change to
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701 gas/Makefile.in, so people not doing development work shouldn't get the
702 impression that support for such configurations is actually believed to be
703 reliable.
252b5132 704
fa94de6b 705* The program name (usually "as") is printed when a fatal error message is
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706 displayed. This should prevent some confusion about the source of occasional
707 messages about "internal errors".
252b5132 708
fa94de6b 709* ELF support is falling into place. Support for the 386 should be working.
a40cbfa3 710 Support for SPARC Solaris is in. HPPA support from Utah is being integrated.
252b5132 711
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712* Symbol values are maintained as expressions instead of being immediately
713 boiled down to add-symbol, sub-symbol, and constant. This permits slightly
714 more complex calculations involving symbols whose values are not alreadey
715 known.
252b5132 716
a40cbfa3 717* DBX-style debugging info ("stabs") is now supported for COFF formats.
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718 If any stabs directives are seen in the source, GAS will create two new
719 sections: a ".stab" and a ".stabstr" section. The format of the .stab
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720 section is nearly identical to the a.out symbol format, and .stabstr is
721 its string table. For this to be useful, you must have configured GCC
722 to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB
723 that can use the stab sections (4.11 or later).
252b5132 724
fa94de6b 725* LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS
a40cbfa3 726 support is in progress.
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727
728Changes in 2.1:
729
fa94de6b 730* Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been
a40cbfa3 731 incorporated, but not well tested yet.
252b5132 732
fa94de6b 733* Altered the opcode table split for m68k; it should require less VM to compile
a40cbfa3 734 with gcc now.
252b5132 735
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736* Some minor adjustments to add (Convergent Technologies') Miniframe support,
737 suggested by Ronald Cole.
252b5132 738
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739* HPPA support (running OSF only, not HPUX) has been contributed by Utah. This
740 includes improved ELF support, which I've started adapting for SPARC Solaris
741 2.x. Integration isn't completely, so it probably won't work.
252b5132 742
a40cbfa3 743* HP9000/300 support, donated by HP, has been merged in.
252b5132 744
a40cbfa3 745* Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support.
252b5132 746
a40cbfa3 747* Better error messages for unsupported configurations (e.g., hppa-hpux).
252b5132 748
a40cbfa3 749* Test suite framework is starting to become reasonable.
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750
751Changes in 2.0:
752
a40cbfa3 753* Mostly bug fixes.
252b5132 754
a40cbfa3 755* Some more merging of BFD and ELF code, but ELF still doesn't work.
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756
757Changes in 1.94:
758
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759* BFD merge is partly done. Adventurous souls may try giving configure the
760 "--with-bfd-assembler" option. Currently, ELF format requires it, a.out
761 format accepts it; SPARC CPU accepts it. It's the default only for OS "elf"
762 or "solaris". (ELF isn't really supported yet. It needs work. I've got
763 some code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not
764 fully merged yet.)
252b5132 765
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766* The 68K opcode table has been split in half. It should now compile under gcc
767 without consuming ridiculous amounts of memory.
252b5132 768
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769* A couple data structures have been reduced in size. This should result in
770 saving a little bit of space at runtime.
252b5132 771
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772* Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF
773 code provided ROSE format support, which I haven't merged in yet. (I can
774 make it available, if anyone wants to try it out.) Ralph's code, for BSD
775 4.4, supports a.out format. We don't have ECOFF support in just yet; it's
776 coming.
252b5132 777
a40cbfa3 778* Support for the Hitachi H8/500 has been added.
252b5132 779
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780* VMS host and target support should be working now, thanks chiefly to Eric
781 Youngdale.
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782
783Changes in 1.93.01:
784
a40cbfa3 785* For m68k, support for more processors has been added: 68040, CPU32, 68851.
252b5132 786
a40cbfa3 787* For i386, .align is now power-of-two; was number-of-bytes.
252b5132 788
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789* For m68k, "%" is now accepted before register names. For COFF format, which
790 doesn't use underscore prefixes for C labels, it is required, so variable "a0"
791 can be distinguished from the register.
252b5132 792
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793* Last public release was 1.38. Lots of configuration changes since then, lots
794 of new CPUs and formats, lots of bugs fixed.
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795
796\f
82704155 797Copyright (C) 2012-2019 Free Software Foundation, Inc.
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798
799Copying and distribution of this file, with or without modification,
800are permitted in any medium without royalty provided the copyright
801notice and this notice are preserved.
802
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803Local variables:
804fill-column: 79
805End: