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252b5132 1-*- text -*-
96a84ea3 2
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AV
3* Add support for the Armv8.1-M Mainline and M-profile Vector Extension (MVE)
4 instructions.
5
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6* For MIPS, Add -m[no-]fix-loongson3-llsc option to fix (or not) Loongson3 LLSC
7 Errata. Add a --enable-mips-fix-loongson3-llsc=[yes|no] configure time option
8 to set the default behavior. Set the default if the configure option is not used
9 to "no".
10
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NC
11Changes in 2.32:
12
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13* Add -mvexwig=[0|1] option to x86 assembler to control encoding of
14 VEX.W-ignored (WIG) VEX instructions.
15
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16* Add -mx86-used-note=[yes|no] option to generate (or not) x86 GNU property
17 notes. Add a --enable-x86-used-note configure time option to set the
18 default behavior. Set the default if the configure option is not used
19 to "no".
20
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21* Add support for the MIPS Loongson EXTensions R2 (EXT2) instructions.
22
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23* Add support for the MIPS Loongson EXTensions (EXT) instructions.
24
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25* Add support for the MIPS Loongson Content Address Memory (CAM) ASE.
26
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27* Add support for the C-SKY processor series.
28
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29* Add support for the MIPS Loongson MultiMedia extensions Instructions (MMI)
30 ASE.
31
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32Changes in 2.31:
33
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34* The ADR and ADRL pseudo-instructions supported by the ARM assembler
35 now only set the bottom bit of the address of thumb function symbols
36 if the -mthumb-interwork command line option is active.
37
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38* Add support for the MIPS Global INValidate (GINV) ASE.
39
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SE
40* Add support for the MIPS Cyclic Redudancy Check (CRC) ASE.
41
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42* Add support for the Freescale S12Z architecture.
43
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NC
44* Add --generate-missing-build-notes=[yes|no] option to create (or not) GNU
45 Build Attribute notes if none are present in the input sources. Add a
46 --enable-generate-build-notes=[yes|no] configure time option to set the
47 default behaviour. Set the default if the configure option is not used
48 to "no".
49
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50* Remove -mold-gcc command-line option for x86 targets.
51
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52* Add -O[2|s] command-line options to x86 assembler to enable alternate
53 shorter instruction encoding.
54
8f065d3b 55* Add support for .nops directive. It is currently supported only for
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56 x86 targets.
57
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NC
58Changes in 2.30:
59
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60* Add support for loaction views in DWARF debug line information.
61
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TG
62Changes in 2.29:
63
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L
64* Add support for ELF SHF_GNU_MBIND.
65
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66* Add support for the WebAssembly file format and wasm32 ELF conversion.
67
7e0de605 68* PowerPC gas now checks that the correct register class is used in
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69 instructions. For instance, "addi %f4,%cr3,%r31" warns three times
70 that the registers are invalid.
7e0de605 71
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72* Add support for the Texas Instruments PRU processor.
73
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TP
74* Support for the ARMv8-R architecture and Cortex-R52 processor has been
75 added to the ARM port.
ced40572 76
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TG
77Changes in 2.28:
78
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79* Add support for the RISC-V architecture.
80
b19ea8d2 81* Add support for the ARM Cortex-M23 and Cortex-M33 processors.
ce1b0a45 82
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TG
83Changes in 2.27:
84
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85* Default to --enable-compressed-debug-sections=gas for Linux/x86 targets.
86
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87* Add --no-pad-sections to stop the assembler from padding the end of output
88 sections up to their alignment boundary.
89
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90* Support for the ARMv8-M architecture has been added to the ARM port. Support
91 for the ARMv8-M Security and DSP Extensions has also been added to the ARM
92 port.
93
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CZ
94* ARC backend accepts .extInstruction, .extCondCode, .extAuxRegister, and
95 .extCoreRegister pseudo-ops that allow an user to define custom
96 instructions, conditional codes, auxiliary and core registers.
97
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L
98* Add a configure option --enable-elf-stt-common to decide whether ELF
99 assembler should generate common symbols with the STT_COMMON type by
100 default. Default to no.
101
a05a5b64 102* New command-line option --elf-stt-common= for ELF targets to control
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103 whether to generate common symbols with the STT_COMMON type.
104
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NC
105* Add ability to set section flags and types via numeric values for ELF
106 based targets.
81c23f82 107
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108* Add a configure option --enable-x86-relax-relocations to decide whether
109 x86 assembler should generate relax relocations by default. Default to
110 yes, except for x86 Solaris targets older than Solaris 12.
111
a05a5b64 112* New command-line option -mrelax-relocations= for x86 target to control
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113 whether to generate relax relocations.
114
a05a5b64 115* New command-line option -mfence-as-lock-add=yes for x86 target to encode
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116 lfence, mfence and sfence as "lock addl $0x0, (%[re]sp)".
117
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118* Add assembly-time relaxation option for ARC cpus.
119
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120* Add --with-cpu=TYPE configure option for ARC gas. This allows the default
121 cpu type to be adjusted at configure time.
122
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TG
123Changes in 2.26:
124
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L
125* Add a configure option --enable-compressed-debug-sections={all,gas} to
126 decide whether DWARF debug sections should be compressed by default.
e12fe555 127
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128* Add support for the ARC EM/HS, and ARC600/700 architectures. Remove
129 assembler support for Argonaut RISC architectures.
130
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131* Symbol and label names can now be enclosed in double quotes (") which allows
132 them to contain characters that are not part of valid symbol names in high
133 level languages.
134
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135* Added the correctly spelled -march=armv6kz, for ARMv6KZ support. The
136 previous spelling, -march=armv6zk, is still accepted.
137
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138* Support for the ARMv8.1 architecture has been added to the Aarch64 port.
139 Support for the individual ARMv8.1 Adv.SIMD, LOR and PAN architecture
140 extensions has also been added to the Aarch64 port.
141
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142* Support for the ARMv8.1 architecture has been added to the ARM port. Support
143 for the individual ARMv8.1 Adv.SIMD and PAN architecture extensions has also
144 been added to the ARM port.
145
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146* Extend --compress-debug-sections option to support
147 --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi] for ELF
148 targets.
149
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150* --compress-debug-sections is turned on for Linux/x86 by default.
151
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152Changes in 2.25:
153
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154* Add support for the AVR Tiny microcontrollers.
155
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156* Replace support for openrisc and or32 with support for or1k.
157
2e6976a8 158* Enhanced the ARM port to accept the assembler output from the CodeComposer
a05a5b64 159 Studio tool. Support is enabled via the new command-line option -mccs.
2e6976a8 160
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161* Add support for the Andes NDS32.
162
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TG
163Changes in 2.24:
164
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NC
165* Add support for the Texas Instruments MSP430X processor.
166
a05a5b64 167* Add -gdwarf-sections command-line option to enable per-code-section
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168 generation of DWARF .debug_line sections.
169
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SL
170* Add support for Altera Nios II.
171
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NC
172* Add support for the Imagination Technologies Meta processor.
173
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NC
174* Add support for the v850e3v5.
175
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RS
176* Remove assembler support for MIPS ECOFF targets.
177
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178Changes in 2.23:
179
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NC
180* Add support for the 64-bit ARM architecture: AArch64.
181
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NC
182* Add support for S12X processor.
183
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JL
184* Add support for the VLE extension to the PowerPC architecture.
185
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186* Add support for the Freescale XGATE architecture.
187
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RM
188* Add support for .bundle_align_mode, .bundle_lock, and .bundle_unlock
189 directives. These are currently available only for x86 and ARM targets.
190
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191* Add support for the Renesas RL78 architecture.
192
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NC
193* Add support for the Adapteva EPIPHANY architecture.
194
fe13e45b 195* For x86, allow 'rep bsf', 'rep bsr', and 'rep ret' syntax.
29c048b6 196
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197Changes in 2.22:
198
69f56ae1 199* Add support for the Tilera TILEPro and TILE-Gx architectures.
44f45767 200
90b3661c 201Changes in 2.21:
44f45767 202
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203* Gas no longer requires doubling of ampersands in macros.
204
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JM
205* Add support for the TMS320C6000 (TI C6X) processor family.
206
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207* GAS now understands an extended syntax in the .section directive flags
208 for COFF targets that allows the section's alignment to be specified. This
209 feature has also been backported to the 2.20 release series, starting with
210 2.20.1.
211
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212* Add support for the Renesas RX processor.
213
a05a5b64 214* New command-line option, --compress-debug-sections, which requests
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215 compression of DWARF debug information sections in the relocatable output
216 file. Compressed debug sections are supported by readelf, objdump, and
217 gold, but not currently by Gnu ld.
218
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219Changes in 2.20:
220
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221* Added support for v850e2 and v850e2v3.
222
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NC
223* GNU/Linux targets now supports "gnu_unique_object" as a value in the .type
224 pseudo op. It marks the symbol as being globally unique in the entire
225 process.
226
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227* ARM assembler now supports .inst[.nw] pseudo-ops to insert opcodes specified
228 in binary rather than text.
6e33da12 229
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230* Add support for common symbol alignment to PE formats.
231
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CC
232* Add support for the new discriminator column in the DWARF line table,
233 with a discriminator operand for the .loc directive.
234
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235* Add support for Sunplus score architecture.
236
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NC
237* The .type pseudo-op now accepts a type of STT_GNU_IFUNC which can be used to
238 indicate that if the symbol is the target of a relocation, its value should
239 not be use. Instead the function should be invoked and its result used as
240 the value.
fa94de6b 241
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242* Add support for Lattice Mico32 (lm32) architecture.
243
fa94de6b 244* Add support for Xilinx MicroBlaze architecture.
caa03924 245
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TG
246Changes in 2.19:
247
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DJ
248* New pseudo op .cfi_val_encoded_addr, to record constant addresses in unwind
249 tables without runtime relocation.
250
a05a5b64 251* New command-line option, -h-tick-hex, for sh, m32c, and h8/300 targets, which
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252 adds compatibility with H'00 style hex constants.
253
a05a5b64 254* New command-line option, -msse-check=[none|error|warning], for x86
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255 targets.
256
a05a5b64 257* New sub-option added to the assembler's -a command-line switch to
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258 generate a listing output. The 'g' sub-option will insert into the listing
259 various information about the assembly, such as assembler version, the
a05a5b64 260 command-line options used, and a time stamp.
83f10cb2 261
a05a5b64 262* New command-line option -msse2avx for x86 target to encode SSE
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L
263 instructions with VEX prefix.
264
f1f8f695 265* Add Intel XSAVE, EPT, MOVBE, AES, PCLMUL, AVX/FMA support for x86 target.
c0f3af97 266
a05a5b64 267* New command-line options, -march=CPU[,+EXTENSION...], -mtune=CPU,
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268 -mmnemonic=[att|intel], -msyntax=[att|intel], -mindex-reg,
269 -mnaked-reg and -mold-gcc, for x86 targets.
270
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271* Support for generating wide character strings has been added via the new
272 pseudo ops: .string16, .string32 and .string64.
273
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MM
274* Support for SSE5 has been added to the i386 port.
275
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276Changes in 2.18:
277
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278* The GAS sources are now released under the GPLv3.
279
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280* Support for the National Semiconductor CR16 target has been added.
281
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AM
282* Added gas .reloc pseudo. This is a low-level interface for creating
283 relocations.
284
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285* Add support for x86_64 PE+ target.
286
1c0d3aa6 287* Add support for Score target.
83518699 288
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289Changes in 2.17:
290
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291* Support for the Infineon XC16X has been added by KPIT Cummins Infosystems.
292
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NS
293* Support for ms2 architecture has been added.
294
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295* Support for the Z80 processor family has been added.
296
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MM
297* Add support for the "@<file>" syntax to the command line, so that extra
298 switches can be read from <file>.
299
a05a5b64 300* The SH target supports a new command-line switch --enable-reg-prefix which,
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301 if enabled, will allow register names to be optionally prefixed with a $
302 character. This allows register names to be distinguished from label names.
fa94de6b 303
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304* Macros with a variable number of arguments are now supported. See the
305 documentation for how this works.
306
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307* Added --reduce-memory-overheads switch to reduce the size of the hash
308 tables used, at the expense of longer assembly times, and
309 --hash-size=<NUMBER> to set the size of the hash tables used by gas.
310
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311* Macro names and macro parameter names can now be any identifier that would
312 also be legal as a symbol elsewhere. For macro parameter names, this is
313 known to cause problems in certain sources when the respective target uses
314 characters inconsistently, and thus macro parameter references may no longer
315 be recognized as such (see the documentation for details).
fa94de6b 316
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317* Support the .f_floating, .d_floating, .g_floating and .h_floating directives
318 for the VAX target in order to be more compatible with the VAX MACRO
319 assembler.
320
a05a5b64 321* New command-line option -mtune=[itanium1|itanium2] for IA64 targets.
8c2fda1d 322
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323Changes in 2.16:
324
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325* Redefinition of macros now results in an error.
326
a05a5b64 327* New command-line option -mhint.b=[ok|warning|error] for IA64 targets.
91d777ee 328
a05a5b64 329* New command-line option -munwind-check=[warning|error] for IA64
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330 targets.
331
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332* The IA64 port now uses automatic dependency violation removal as its default
333 mode.
334
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335* Port to MAXQ processor contributed by HCL Tech.
336
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337* Added support for generating unwind tables for ARM ELF targets.
338
a05a5b64 339* Add a -g command-line option to generate debug information in the target's
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340 preferred debug format.
341
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342* Support for the crx-elf target added.
343
1a320fbb 344* Support for the sh-symbianelf target added.
1fe1f39c 345
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BF
346* Added a pseudo-op (.secrel32) to generate 32 bit section relative relocations
347 on pe[i]-i386; required for this target's DWARF 2 support.
348
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349* Support for Motorola MCF521x/5249/547x/548x added.
350
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NC
351* Support for ColdFire EMAC instructions added and Motorola syntax for MAC/EMAC
352 instrucitons.
353
a05a5b64 354* New command-line option -mno-shared for MIPS ELF targets.
aa6975fb 355
a05a5b64 356* New command-line option --alternate and pseudo-ops .altmacro and .noaltmacro
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357 added to enter (and leave) alternate macro syntax mode.
358
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NC
359Changes in 2.15:
360
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CD
361* The MIPS -membedded-pic option (Embedded-PIC code generation) is
362 deprecated and will be removed in a future release.
363
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NC
364* Added PIC m32r Linux (ELF) and support to M32R assembler.
365
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MM
366* Added support for ARM V6.
367
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MS
368* Added support for sh4a and variants.
369
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NC
370* Support for Renesas M32R2 added.
371
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372* Limited support for Mapping Symbols as specified in the ARM ELF
373 specification has been added to the arm assembler.
ed769ec1 374
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NC
375* On ARM architectures, added a new gas directive ".unreq" that undoes
376 definitions created by ".req".
377
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NC
378* Support for Motorola ColdFire MCF528x added.
379
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NC
380* Added --gstabs+ switch to enable the generation of STABS debug format
381 information with GNU extensions.
fa94de6b 382
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CD
383* Added support for MIPS64 Release 2.
384
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NC
385* Added support for v850e1.
386
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387* Added -n switch for x86 assembler. By default, x86 GAS replaces
388 multiple nop instructions used for alignment within code sections
389 with multi-byte nop instructions such as leal 0(%esi,1),%esi. This
390 switch disables the optimization.
391
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ILT
392* Removed -n option from MIPS assembler. It was not useful, and confused the
393 existing -non_shared option.
394
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CD
395Changes in 2.14:
396
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CD
397* Added support for MIPS32 Release 2.
398
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NC
399* Added support for Xtensa architecture.
400
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NC
401* Support for Intel's iWMMXt processor (an ARM variant) added.
402
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NC
403* An assembler test generator has been contributed and an example file that
404 uses it (gas/testsuite/gas/all/test-gen.c and test-exmaple.c).
fa94de6b 405
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NC
406* Support for SH2E added.
407
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NC
408* GASP has now been removed.
409
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NC
410* Support for Texas Instruments TMS320C4x and TMS320C3x series of
411 DSP's contributed by Michael Hayes and Svein E. Seldal.
fa94de6b 412
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NC
413* Support for the Ubicom IP2xxx microcontroller added.
414
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NC
415Changes in 2.13:
416
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NC
417* Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400
418 and FR500 included.
0ebb9a87 419
a40cbfa3 420* Support for DLX processor added.
52216602 421
a40cbfa3
NC
422* GASP has now been deprecated and will be removed in a future release. Use
423 the macro facilities in GAS instead.
3f965e60 424
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NC
425* GASP now correctly parses floating point numbers. Unless the base is
426 explicitly specified, they are interpreted as decimal numbers regardless of
427 the currently specified base.
1ac57253 428
9a66911f
NC
429Changes in 2.12:
430
a40cbfa3 431* Support for Don Knuth's MMIX, by Hans-Peter Nilsson.
49fda6c8 432
a40cbfa3 433* Support for the OpenRISC 32-bit embedded processor by OpenCores.
3b16e843 434
fa94de6b
RM
435* The ARM assembler now accepts -march=..., -mcpu=... and -mfpu=... for
436 specifying the target instruction set. The old method of specifying the
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NC
437 target processor has been deprecated, but is still accepted for
438 compatibility.
03b1477f 439
a40cbfa3
NC
440* Support for the VFP floating-point instruction set has been added to
441 the ARM assembler.
252b5132 442
a40cbfa3
NC
443* New psuedo op: .incbin to include a set of binary data at a given point
444 in the assembly. Contributed by Anders Norlander.
7e005732 445
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NC
446* The MIPS assembler now accepts -march/-mtune. -mcpu has been deprecated
447 but still works for compatability.
ec68c924 448
fa94de6b 449* The MIPS assembler no longer issues a warning by default when it
a05a5b64 450 generates a nop instruction from a macro. The new command-line option
a40cbfa3 451 -n will turn on the warning.
63486801 452
2dac7317
JW
453Changes in 2.11:
454
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NC
455* Support for PDP-11 and 2.11BSD a.out format, by Lars Brinkhoff.
456
a40cbfa3 457* x86 gas now supports the full Pentium4 instruction set.
a167610d 458
a40cbfa3 459* Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs.
c0d8940f 460
a40cbfa3 461* Support for Motorola 68HC11 and 68HC12.
df86943d 462
a40cbfa3 463* Support for Texas Instruments TMS320C54x (tic54x).
39bec121 464
a40cbfa3 465* Support for IA-64.
2dac7317 466
a40cbfa3 467* Support for i860, by Jason Eckhardt.
22b36938 468
a40cbfa3 469* Support for CRIS (Axis Communications ETRAX series).
5bcac8a4 470
a40cbfa3 471* x86 gas has a new .arch pseudo op to specify the target CPU architecture.
a38cf1db 472
a05a5b64 473* x86 gas -q command-line option quietens warnings about register size changes
a40cbfa3
NC
474 due to suffix, indirect jmp/call without `*', stand-alone prefixes, and
475 translating various deprecated floating point instructions.
a38cf1db 476
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RH
477Changes in 2.10:
478
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NC
479* Support for the ARM msr instruction was changed to only allow an immediate
480 operand when altering the flags field.
d14442f4 481
a40cbfa3 482* Support for ATMEL AVR.
adde6300 483
a40cbfa3 484* Support for IBM 370 ELF. Somewhat experimental.
b5ebe70e 485
a40cbfa3 486* Support for numbers with suffixes.
3fd9f047 487
a40cbfa3 488* Added support for breaking to the end of repeat loops.
6a6987a9 489
a40cbfa3 490* Added support for parallel instruction syntax (DOUBLEBAR_PARALLEL).
6a6987a9 491
a40cbfa3 492* New .elseif pseudo-op added.
3fd9f047 493
a40cbfa3 494* New --fatal-warnings option.
1f776aa5 495
a40cbfa3 496* picoJava architecture support added.
252b5132 497
a40cbfa3 498* Motorola MCore 210 processor support added.
041dd5a9 499
fa94de6b 500* A new pseudo-op .intel_syntax has been implemented to allow gas to parse i386
a40cbfa3 501 assembly programs with intel syntax.
252b5132 502
a40cbfa3 503* New pseudo-ops .func,.endfunc to aid in debugging user-written assembler code.
252b5132 504
a40cbfa3 505* Added -gdwarf2 option to generate DWARF 2 debugging information.
041dd5a9 506
a40cbfa3 507* Full 16-bit mode support for i386.
252b5132 508
fa94de6b 509* Greatly improved instruction operand checking for i386. This change will
a40cbfa3
NC
510 produce errors or warnings on incorrect assembly code that previous versions
511 of gas accepted. If you get unexpected messages from code that worked with
512 older versions of gas, please double check the code before reporting a bug.
252b5132 513
a40cbfa3 514* Weak symbol support added for COFF targets.
252b5132 515
a40cbfa3 516* Mitsubishi D30V support added.
252b5132 517
a40cbfa3 518* Texas Instruments c80 (tms320c80) support added.
252b5132 519
a40cbfa3 520* i960 ELF support added.
bedf545c 521
a40cbfa3 522* ARM ELF support added.
a057431b 523
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524Changes in 2.9:
525
a40cbfa3 526* Texas Instruments c30 (tms320c30) support added.
252b5132 527
fa94de6b 528* The assembler now optimizes the exception frame information generated by egcs
a40cbfa3 529 and gcc 2.8. The new --traditional-format option disables this optimization.
252b5132 530
a40cbfa3 531* Added --gstabs option to generate stabs debugging information.
252b5132 532
fa94de6b 533* The -a option takes a new suboption, m (e.g., -alm) to expand macros in a
a40cbfa3 534 listing.
252b5132 535
a40cbfa3 536* Added -MD option to print dependencies.
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537
538Changes in 2.8:
539
a40cbfa3 540* BeOS support added.
252b5132 541
a40cbfa3 542* MIPS16 support added.
252b5132 543
a40cbfa3 544* Motorola ColdFire 5200 support added (configure for m68k and use -m5200).
252b5132 545
a40cbfa3 546* Alpha/VMS support added.
252b5132 547
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548* m68k options --base-size-default-16, --base-size-default-32,
549 --disp-size-default-16, and --disp-size-default-32 added.
252b5132 550
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551* The alignment directives now take an optional third argument, which is the
552 maximum number of bytes to skip. If doing the alignment would require
553 skipping more than the given number of bytes, the alignment is not done at
554 all.
252b5132 555
a40cbfa3 556* The ELF assembler has a new pseudo-op, .symver, used for symbol versioning.
252b5132 557
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558* The -a option takes a new suboption, c (e.g., -alc), to skip false
559 conditionals in listings.
252b5132 560
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561* Added new pseudo-op, .equiv; it's like .equ, except that it is an error if
562 the symbol is already defined.
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563
564Changes in 2.7:
565
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566* The PowerPC assembler now allows the use of symbolic register names (r0,
567 etc.) if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.)
568 can be used any time. PowerPC 860 move to/from SPR instructions have been
569 added.
252b5132 570
a40cbfa3 571* Alpha Linux (ELF) support added.
252b5132 572
a40cbfa3 573* PowerPC ELF support added.
252b5132 574
a40cbfa3 575* m68k Linux (ELF) support added.
252b5132 576
a40cbfa3 577* i960 Hx/Jx support added.
252b5132 578
a40cbfa3 579* i386/PowerPC gnu-win32 support added.
252b5132 580
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581* SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the
582 default is to build COFF-only support. To get a set of tools that generate
fa94de6b 583 ELF (they'll understand both COFF and ELF), you must configure with
a40cbfa3 584 target=i386-unknown-sco3.2v5elf.
252b5132 585
a40cbfa3 586* m88k-motorola-sysv3* support added.
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587
588Changes in 2.6:
589
a40cbfa3 590* Gas now directly supports macros, without requiring GASP.
252b5132 591
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592* Gas now has an MRI assembler compatibility mode. Use -M or --mri to select
593 MRI mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the
594 ``.mri 0'' is seen; this can be convenient for inline assembler code.
252b5132 595
a40cbfa3 596* Added --defsym SYM=VALUE option.
252b5132 597
a40cbfa3 598* Added -mips4 support to MIPS assembler.
252b5132 599
a40cbfa3 600* Added PIC support to Solaris and SPARC SunOS 4 assembler.
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601
602Changes in 2.4:
603
a40cbfa3 604* Converted this directory to use an autoconf-generated configure script.
252b5132 605
a40cbfa3 606* ARM support, from Richard Earnshaw.
252b5132 607
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608* Updated VMS support, from Pat Rankin, including considerably improved
609 debugging support.
252b5132 610
a40cbfa3 611* Support for the control registers in the 68060.
252b5132 612
a40cbfa3 613* Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to
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614 provide for possible future gcc changes, for targets where gas provides some
615 features not available in the native assembler. If the native assembler is
a40cbfa3 616 used, it should become obvious pretty quickly what the problem is.
252b5132 617
a40cbfa3 618* Usage message is available with "--help".
252b5132 619
fa94de6b 620* The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3
a40cbfa3 621 also, but didn't get into the NEWS file.)
252b5132 622
a40cbfa3 623* Weak symbol support for a.out.
252b5132 624
fa94de6b 625* A bug in the listing code which could cause an infinite loop has been fixed.
a40cbfa3 626 Bugs in listings when generating a COFF object file have also been fixed.
252b5132 627
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628* Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by
629 Paul Kranenburg.
252b5132 630
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631* Improved Alpha support. Immediate constants can have a much larger range
632 now. Support for the 21164 has been contributed by Digital.
252b5132 633
a40cbfa3 634* Updated ns32k (pc532-mach, netbsd532) support from Ian Dall.
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635
636Changes in 2.3:
637
a40cbfa3 638* Mach i386 support, by David Mackenzie and Ken Raeburn.
252b5132 639
a40cbfa3 640* RS/6000 and PowerPC support by Ian Taylor.
252b5132 641
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642* VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit,
643 based on mail received from various people. The `-h#' option should work
644 again too.
252b5132 645
a40cbfa3 646* HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work
fa94de6b 647 with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special
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648 version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve
649 this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu
650 in the "dist" directory.
252b5132 651
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652* Vax support in gas fixed for BSD, so it builds and seems to run a couple
653 simple tests okay. I haven't put it through extensive testing. (GNU make is
654 currently required for BSD 4.3 builds.)
252b5132 655
fa94de6b 656* Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is
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657 based on code donated by CMU, which used an a.out-based format. I'm afraid
658 the alpha-a.out support is pretty badly mangled, and much of it removed;
659 making it work will require rewriting it as BFD support for the format anyways.
252b5132 660
a40cbfa3 661* Irix 5 support.
252b5132 662
fa94de6b 663* The test suites have been fixed up a bit, so that they should work with a
a40cbfa3 664 couple different versions of expect and dejagnu.
252b5132 665
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666* Symbols' values are now handled internally as expressions, permitting more
667 flexibility in evaluating them in some cases. Some details of relocation
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668 handling have also changed, and simple constant pool management has been
669 added, to make the Alpha port easier.
252b5132 670
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671* New option "--statistics" for printing out program run times. This is
672 intended to be used with the gcc "-Q" option, which prints out times spent in
673 various phases of compilation. (You should be able to get all of them
674 printed out with "gcc -Q -Wa,--statistics", I think.)
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675
676Changes in 2.2:
677
a40cbfa3 678* RS/6000 AIX and MIPS SGI Irix 5 support has been added.
252b5132 679
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680* Configurations that are still in development (and therefore are convenient to
681 have listed in configure.in) still get rejected without a minor change to
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682 gas/Makefile.in, so people not doing development work shouldn't get the
683 impression that support for such configurations is actually believed to be
684 reliable.
252b5132 685
fa94de6b 686* The program name (usually "as") is printed when a fatal error message is
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687 displayed. This should prevent some confusion about the source of occasional
688 messages about "internal errors".
252b5132 689
fa94de6b 690* ELF support is falling into place. Support for the 386 should be working.
a40cbfa3 691 Support for SPARC Solaris is in. HPPA support from Utah is being integrated.
252b5132 692
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693* Symbol values are maintained as expressions instead of being immediately
694 boiled down to add-symbol, sub-symbol, and constant. This permits slightly
695 more complex calculations involving symbols whose values are not alreadey
696 known.
252b5132 697
a40cbfa3 698* DBX-style debugging info ("stabs") is now supported for COFF formats.
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699 If any stabs directives are seen in the source, GAS will create two new
700 sections: a ".stab" and a ".stabstr" section. The format of the .stab
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701 section is nearly identical to the a.out symbol format, and .stabstr is
702 its string table. For this to be useful, you must have configured GCC
703 to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB
704 that can use the stab sections (4.11 or later).
252b5132 705
fa94de6b 706* LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS
a40cbfa3 707 support is in progress.
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708
709Changes in 2.1:
710
fa94de6b 711* Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been
a40cbfa3 712 incorporated, but not well tested yet.
252b5132 713
fa94de6b 714* Altered the opcode table split for m68k; it should require less VM to compile
a40cbfa3 715 with gcc now.
252b5132 716
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717* Some minor adjustments to add (Convergent Technologies') Miniframe support,
718 suggested by Ronald Cole.
252b5132 719
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720* HPPA support (running OSF only, not HPUX) has been contributed by Utah. This
721 includes improved ELF support, which I've started adapting for SPARC Solaris
722 2.x. Integration isn't completely, so it probably won't work.
252b5132 723
a40cbfa3 724* HP9000/300 support, donated by HP, has been merged in.
252b5132 725
a40cbfa3 726* Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support.
252b5132 727
a40cbfa3 728* Better error messages for unsupported configurations (e.g., hppa-hpux).
252b5132 729
a40cbfa3 730* Test suite framework is starting to become reasonable.
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731
732Changes in 2.0:
733
a40cbfa3 734* Mostly bug fixes.
252b5132 735
a40cbfa3 736* Some more merging of BFD and ELF code, but ELF still doesn't work.
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737
738Changes in 1.94:
739
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740* BFD merge is partly done. Adventurous souls may try giving configure the
741 "--with-bfd-assembler" option. Currently, ELF format requires it, a.out
742 format accepts it; SPARC CPU accepts it. It's the default only for OS "elf"
743 or "solaris". (ELF isn't really supported yet. It needs work. I've got
744 some code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not
745 fully merged yet.)
252b5132 746
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747* The 68K opcode table has been split in half. It should now compile under gcc
748 without consuming ridiculous amounts of memory.
252b5132 749
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750* A couple data structures have been reduced in size. This should result in
751 saving a little bit of space at runtime.
252b5132 752
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753* Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF
754 code provided ROSE format support, which I haven't merged in yet. (I can
755 make it available, if anyone wants to try it out.) Ralph's code, for BSD
756 4.4, supports a.out format. We don't have ECOFF support in just yet; it's
757 coming.
252b5132 758
a40cbfa3 759* Support for the Hitachi H8/500 has been added.
252b5132 760
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761* VMS host and target support should be working now, thanks chiefly to Eric
762 Youngdale.
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763
764Changes in 1.93.01:
765
a40cbfa3 766* For m68k, support for more processors has been added: 68040, CPU32, 68851.
252b5132 767
a40cbfa3 768* For i386, .align is now power-of-two; was number-of-bytes.
252b5132 769
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770* For m68k, "%" is now accepted before register names. For COFF format, which
771 doesn't use underscore prefixes for C labels, it is required, so variable "a0"
772 can be distinguished from the register.
252b5132 773
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774* Last public release was 1.38. Lots of configuration changes since then, lots
775 of new CPUs and formats, lots of bugs fixed.
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776
777\f
82704155 778Copyright (C) 2012-2019 Free Software Foundation, Inc.
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779
780Copying and distribution of this file, with or without modification,
781are permitted in any medium without royalty provided the copyright
782notice and this notice are preserved.
783
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784Local variables:
785fill-column: 79
786End: