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