1-*- text -*- 2 3Changes in 2.39: 4 5* Remove (rudimentary) support for the x86-64 sub-architectures Intel L1OM and 6 Intel K1OM. 7 8Changes in 2.38: 9 10* Add support for AArch64 system registers that were missing in previous 11 releases. 12 13* Add support for the LoongArch instruction set. 14 15* Add a command-line option, -muse-unaligned-vector-move, for x86 target 16 to encode aligned vector move as unaligned vector move. 17 18* Add support for Cortex-R52+ for Arm. 19 20* Add support for Cortex-A510, Cortex-A710, Cortex-X2 for AArch64. 21 22* Add support for Cortex-A710 for Arm. 23 24* Add support for Scalable Matrix Extension (SME) for AArch64. 25 26* The --multibyte-handling=[allow|warn|warn-sym-only] option tells the 27 assembler what to when it encoutners multibyte characters in the input. The 28 default is to allow them. Setting the option to "warn" will generate a 29 warning message whenever any multibyte character is encountered. Using the 30 option to "warn-sym-only" will make the assembler generate a warning whenever a 31 symbol is defined containing multibyte characters. (References to undefined 32 symbols will not generate warnings). 33 34* Outputs of .ds.x directive and .tfloat directive with hex input from 35 x86 assembler have been reduced from 12 bytes to 10 bytes to match the 36 output of .tfloat directive. 37 38* Add support for 'armv8.8-a', 'armv9-a', 'armv9.1-a', 'armv9.2-a' and 39 'armv9.3-a' for -march in AArch64 GAS. 40 41* Add support for 'armv8.7-a', 'armv8.8-a', 'armv9-a', 'armv9.1-a', 42 'armv9.2-a' and 'armv9.3-a' for -march in Arm GAS. 43 44* Add support for Intel AVX512_FP16 instructions. 45 46Changes in 2.37: 47 48* arm-symbianelf support removed. 49 50* Add support for Realm Management Extension (RME) for AArch64. 51 52Changes in 2.36: 53 54* Add support for Intel AVX VNNI instructions. 55 56* Add support for Intel HRESET instruction. 57 58* Add support for Intel UINTR instructions. 59 60* Support non-absolute segment values for i386 lcall and ljmp. 61 62* When setting the link order attribute of ELF sections, it is now possible to 63 use a numeric section index instead of symbol name. 64 65* Add support for Cortex-A78, Cortex-A78AE, Cortex-A78C and Cortex-X1 for 66 AArch64 and ARM. 67 Add support for Cortex-R82, Neoverse V1, and Neoverse N2 for ARM. 68 69* Add support for ETMv4 (Embedded Trace Macrocell), ETE (Embedded Trace 70 Extension), TRBE (Trace Buffer Extension)and BRBE (Branch Record Buffer 71 Extension) system registers for AArch64. 72 73* Add support for Armv8-R and Armv8.7-A AArch64. 74 75* Add support for DSB memory nXS barrier, WFET and WFIT instruction for Armv8.7 76 AArch64. 77 78* Add support for +flagm feature for -march in Armv8.4 AArch64. 79 80* Add support for +ls64 feature for -march in Armv8.7 AArch64. Add atomic 81 64-byte load/store instructions for this feature. 82 83* Add support for +pauth (Pointer Authentication) feature for -march in 84 AArch64. 85 86* Add support for Intel TDX instructions. 87 88* Add support for Intel Key Locker instructions. 89 90* Added a .nop directive to generate a single no-op instruction in a target 91 neutral manner. This instruction does have an effect on DWARF line number 92 generation, if that is active. 93 94* Removed --reduce-memory-overheads and --hash-size as gas now 95 uses hash tables that can be expand and shrink automatically. 96 97* Add {disp16} pseudo prefix to x86 assembler. 98 99* Add support for Intel AMX instructions. 100 101* Configure with --enable-x86-used-note by default for Linux/x86. 102 103* Add support for the SHF_GNU_RETAIN flag, which can be applied to 104 sections using the 'R' flag in the .section directive. 105 SHF_GNU_RETAIN specifies that the section should not be garbage 106 collected by the linker. It requires the GNU or FreeBSD ELF OSABIs. 107 108Changes in 2.35: 109 110* X86 NaCl target support is removed. 111 112* Extend .symver directive to update visibility of the original symbol 113 and assign one original symbol to different versioned symbols. 114 115* Add support for Intel SERIALIZE and TSXLDTRK instructions. 116 117* Add -mlfence-after-load=, -mlfence-before-indirect-branch= and 118 -mlfence-before-ret= options to x86 assembler to help mitigate 119 CVE-2020-0551. 120 121* Add --gdwarf-5 option to the assembler to generate DWARF 5 debug output 122 (if such output is being generated). Added the ability to generate 123 version 5 .debug_line sections. 124 125* Add -mbig-obj support to i386 MingW targets. 126 127Changes in 2.34: 128 129* Add -malign-branch-boundary=NUM, -malign-branch=TYPE[+TYPE...], 130 -malign-branch-prefix-size=NUM and -mbranches-within-32B-boundaries 131 options to x86 assembler to align branches within a fixed boundary 132 with segment prefixes or NOPs. 133 134* Add support for Zilog eZ80 and Zilog Z180 CPUs. 135 136* Add support for z80-elf target. 137 138* Add support for relocation of each byte or word of multibyte value to Z80 139 targets (just use right shift to 0, 8, 16, or 24 bits or AND operation 140 with 0xff/0xffff mask): ld a, label >> 16 \ ld hl, label & 0xffff 141 142* Add SDCC support for Z80 targets. 143 144Changes in 2.33: 145 146* Add support for the Arm Scalable Vector Extension version 2 (SVE2) 147 instructions. 148 149* Add support for the Arm Transactional Memory Extension (TME) 150 instructions. 151 152* Add support for the Armv8.1-M Mainline and M-profile Vector Extension (MVE) 153 instructions. 154 155* For MIPS, Add -m[no-]fix-loongson3-llsc option to fix (or not) Loongson3 156 LLSC Errata. Add a --enable-mips-fix-loongson3-llsc=[yes|no] configure 157 time option to set the default behavior. Set the default if the configure 158 option is not used to "no". 159 160* Add support for the Arm Cortex-A76AE, Cortex-A77 and Cortex-M35P 161 processors. 162 163* Add support for the AArch64 Cortex-A34, Cortex-A65, Cortex-A65AE, 164 Cortex-A76AE, and Cortex-A77 processors. 165 166* Add .float16 directive for both Arm and AArch64 to allow encoding of 16-bit 167 floating point literals. Add .float16_format directive and 168 -mfp16-format=[ieee|alternative] option for Arm to control the format of the 169 encoding. 170 171* Add --gdwarf-cie-version command line flag. This allows control over which 172 version of DWARF CIE the assembler creates. 173 174Changes in 2.32: 175 176* Add -mvexwig=[0|1] option to x86 assembler to control encoding of 177 VEX.W-ignored (WIG) VEX instructions. 178 179* Add -mx86-used-note=[yes|no] option to generate (or not) x86 GNU property 180 notes. Add a --enable-x86-used-note configure time option to set the 181 default behavior. Set the default if the configure option is not used 182 to "no". 183 184* Add support for the MIPS Loongson EXTensions R2 (EXT2) instructions. 185 186* Add support for the MIPS Loongson EXTensions (EXT) instructions. 187 188* Add support for the MIPS Loongson Content Address Memory (CAM) ASE. 189 190* Add support for the C-SKY processor series. 191 192* Add support for the MIPS Loongson MultiMedia extensions Instructions (MMI) 193 ASE. 194 195Changes in 2.31: 196 197* The ADR and ADRL pseudo-instructions supported by the ARM assembler 198 now only set the bottom bit of the address of thumb function symbols 199 if the -mthumb-interwork command line option is active. 200 201* Add support for the MIPS Global INValidate (GINV) ASE. 202 203* Add support for the MIPS Cyclic Redudancy Check (CRC) ASE. 204 205* Add support for the Freescale S12Z architecture. 206 207* Add --generate-missing-build-notes=[yes|no] option to create (or not) GNU 208 Build Attribute notes if none are present in the input sources. Add a 209 --enable-generate-build-notes=[yes|no] configure time option to set the 210 default behaviour. Set the default if the configure option is not used 211 to "no". 212 213* Remove -mold-gcc command-line option for x86 targets. 214 215* Add -O[2|s] command-line options to x86 assembler to enable alternate 216 shorter instruction encoding. 217 218* Add support for .nops directive. It is currently supported only for 219 x86 targets. 220 221Changes in 2.30: 222 223* Add support for loaction views in DWARF debug line information. 224 225Changes in 2.29: 226 227* Add support for ELF SHF_GNU_MBIND. 228 229* Add support for the WebAssembly file format and wasm32 ELF conversion. 230 231* PowerPC gas now checks that the correct register class is used in 232 instructions. For instance, "addi %f4,%cr3,%r31" warns three times 233 that the registers are invalid. 234 235* Add support for the Texas Instruments PRU processor. 236 237* Support for the ARMv8-R architecture and Cortex-R52 processor has been 238 added to the ARM port. 239 240Changes in 2.28: 241 242* Add support for the RISC-V architecture. 243 244* Add support for the ARM Cortex-M23 and Cortex-M33 processors. 245 246Changes in 2.27: 247 248* Default to --enable-compressed-debug-sections=gas for Linux/x86 targets. 249 250* Add --no-pad-sections to stop the assembler from padding the end of output 251 sections up to their alignment boundary. 252 253* Support for the ARMv8-M architecture has been added to the ARM port. Support 254 for the ARMv8-M Security and DSP Extensions has also been added to the ARM 255 port. 256 257* ARC backend accepts .extInstruction, .extCondCode, .extAuxRegister, and 258 .extCoreRegister pseudo-ops that allow an user to define custom 259 instructions, conditional codes, auxiliary and core registers. 260 261* Add a configure option --enable-elf-stt-common to decide whether ELF 262 assembler should generate common symbols with the STT_COMMON type by 263 default. Default to no. 264 265* New command-line option --elf-stt-common= for ELF targets to control 266 whether to generate common symbols with the STT_COMMON type. 267 268* Add ability to set section flags and types via numeric values for ELF 269 based targets. 270 271* Add a configure option --enable-x86-relax-relocations to decide whether 272 x86 assembler should generate relax relocations by default. Default to 273 yes, except for x86 Solaris targets older than Solaris 12. 274 275* New command-line option -mrelax-relocations= for x86 target to control 276 whether to generate relax relocations. 277 278* New command-line option -mfence-as-lock-add=yes for x86 target to encode 279 lfence, mfence and sfence as "lock addl $0x0, (%[re]sp)". 280 281* Add assembly-time relaxation option for ARC cpus. 282 283* Add --with-cpu=TYPE configure option for ARC gas. This allows the default 284 cpu type to be adjusted at configure time. 285 286Changes in 2.26: 287 288* Add a configure option --enable-compressed-debug-sections={all,gas} to 289 decide whether DWARF debug sections should be compressed by default. 290 291* Add support for the ARC EM/HS, and ARC600/700 architectures. Remove 292 assembler support for Argonaut RISC architectures. 293 294* Symbol and label names can now be enclosed in double quotes (") which allows 295 them to contain characters that are not part of valid symbol names in high 296 level languages. 297 298* Added the correctly spelled -march=armv6kz, for ARMv6KZ support. The 299 previous spelling, -march=armv6zk, is still accepted. 300 301* Support for the ARMv8.1 architecture has been added to the Aarch64 port. 302 Support for the individual ARMv8.1 Adv.SIMD, LOR and PAN architecture 303 extensions has also been added to the Aarch64 port. 304 305* Support for the ARMv8.1 architecture has been added to the ARM port. Support 306 for the individual ARMv8.1 Adv.SIMD and PAN architecture extensions has also 307 been added to the ARM port. 308 309* Extend --compress-debug-sections option to support 310 --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi] for ELF 311 targets. 312 313* --compress-debug-sections is turned on for Linux/x86 by default. 314 315Changes in 2.25: 316 317* Add support for the AVR Tiny microcontrollers. 318 319* Replace support for openrisc and or32 with support for or1k. 320 321* Enhanced the ARM port to accept the assembler output from the CodeComposer 322 Studio tool. Support is enabled via the new command-line option -mccs. 323 324* Add support for the Andes NDS32. 325 326Changes in 2.24: 327 328* Add support for the Texas Instruments MSP430X processor. 329 330* Add -gdwarf-sections command-line option to enable per-code-section 331 generation of DWARF .debug_line sections. 332 333* Add support for Altera Nios II. 334 335* Add support for the Imagination Technologies Meta processor. 336 337* Add support for the v850e3v5. 338 339* Remove assembler support for MIPS ECOFF targets. 340 341Changes in 2.23: 342 343* Add support for the 64-bit ARM architecture: AArch64. 344 345* Add support for S12X processor. 346 347* Add support for the VLE extension to the PowerPC architecture. 348 349* Add support for the Freescale XGATE architecture. 350 351* Add support for .bundle_align_mode, .bundle_lock, and .bundle_unlock 352 directives. These are currently available only for x86 and ARM targets. 353 354* Add support for the Renesas RL78 architecture. 355 356* Add support for the Adapteva EPIPHANY architecture. 357 358* For x86, allow 'rep bsf', 'rep bsr', and 'rep ret' syntax. 359 360Changes in 2.22: 361 362* Add support for the Tilera TILEPro and TILE-Gx architectures. 363 364Changes in 2.21: 365 366* Gas no longer requires doubling of ampersands in macros. 367 368* Add support for the TMS320C6000 (TI C6X) processor family. 369 370* GAS now understands an extended syntax in the .section directive flags 371 for COFF targets that allows the section's alignment to be specified. This 372 feature has also been backported to the 2.20 release series, starting with 373 2.20.1. 374 375* Add support for the Renesas RX processor. 376 377* New command-line option, --compress-debug-sections, which requests 378 compression of DWARF debug information sections in the relocatable output 379 file. Compressed debug sections are supported by readelf, objdump, and 380 gold, but not currently by Gnu ld. 381 382Changes in 2.20: 383 384* Added support for v850e2 and v850e2v3. 385 386* GNU/Linux targets now supports "gnu_unique_object" as a value in the .type 387 pseudo op. It marks the symbol as being globally unique in the entire 388 process. 389 390* ARM assembler now supports .inst[.nw] pseudo-ops to insert opcodes specified 391 in binary rather than text. 392 393* Add support for common symbol alignment to PE formats. 394 395* Add support for the new discriminator column in the DWARF line table, 396 with a discriminator operand for the .loc directive. 397 398* Add support for Sunplus score architecture. 399 400* The .type pseudo-op now accepts a type of STT_GNU_IFUNC which can be used to 401 indicate that if the symbol is the target of a relocation, its value should 402 not be use. Instead the function should be invoked and its result used as 403 the value. 404 405* Add support for Lattice Mico32 (lm32) architecture. 406 407* Add support for Xilinx MicroBlaze architecture. 408 409Changes in 2.19: 410 411* New pseudo op .cfi_val_encoded_addr, to record constant addresses in unwind 412 tables without runtime relocation. 413 414* New command-line option, -h-tick-hex, for sh, m32c, and h8/300 targets, which 415 adds compatibility with H'00 style hex constants. 416 417* New command-line option, -msse-check=[none|error|warning], for x86 418 targets. 419 420* New sub-option added to the assembler's -a command-line switch to 421 generate a listing output. The 'g' sub-option will insert into the listing 422 various information about the assembly, such as assembler version, the 423 command-line options used, and a time stamp. 424 425* New command-line option -msse2avx for x86 target to encode SSE 426 instructions with VEX prefix. 427 428* Add Intel XSAVE, EPT, MOVBE, AES, PCLMUL, AVX/FMA support for x86 target. 429 430* New command-line options, -march=CPU[,+EXTENSION...], -mtune=CPU, 431 -mmnemonic=[att|intel], -msyntax=[att|intel], -mindex-reg, 432 -mnaked-reg and -mold-gcc, for x86 targets. 433 434* Support for generating wide character strings has been added via the new 435 pseudo ops: .string16, .string32 and .string64. 436 437* Support for SSE5 has been added to the i386 port. 438 439Changes in 2.18: 440 441* The GAS sources are now released under the GPLv3. 442 443* Support for the National Semiconductor CR16 target has been added. 444 445* Added gas .reloc pseudo. This is a low-level interface for creating 446 relocations. 447 448* Add support for x86_64 PE+ target. 449 450* Add support for Score target. 451 452Changes in 2.17: 453 454* Support for the Infineon XC16X has been added by KPIT Cummins Infosystems. 455 456* Support for ms2 architecture has been added. 457 458* Support for the Z80 processor family has been added. 459 460* Add support for the "@<file>" syntax to the command line, so that extra 461 switches can be read from <file>. 462 463* The SH target supports a new command-line switch --enable-reg-prefix which, 464 if enabled, will allow register names to be optionally prefixed with a $ 465 character. This allows register names to be distinguished from label names. 466 467* Macros with a variable number of arguments are now supported. See the 468 documentation for how this works. 469 470* Added --reduce-memory-overheads switch to reduce the size of the hash 471 tables used, at the expense of longer assembly times, and 472 --hash-size=<NUMBER> to set the size of the hash tables used by gas. 473 474* Macro names and macro parameter names can now be any identifier that would 475 also be legal as a symbol elsewhere. For macro parameter names, this is 476 known to cause problems in certain sources when the respective target uses 477 characters inconsistently, and thus macro parameter references may no longer 478 be recognized as such (see the documentation for details). 479 480* Support the .f_floating, .d_floating, .g_floating and .h_floating directives 481 for the VAX target in order to be more compatible with the VAX MACRO 482 assembler. 483 484* New command-line option -mtune=[itanium1|itanium2] for IA64 targets. 485 486Changes in 2.16: 487 488* Redefinition of macros now results in an error. 489 490* New command-line option -mhint.b=[ok|warning|error] for IA64 targets. 491 492* New command-line option -munwind-check=[warning|error] for IA64 493 targets. 494 495* The IA64 port now uses automatic dependency violation removal as its default 496 mode. 497 498* Port to MAXQ processor contributed by HCL Tech. 499 500* Added support for generating unwind tables for ARM ELF targets. 501 502* Add a -g command-line option to generate debug information in the target's 503 preferred debug format. 504 505* Support for the crx-elf target added. 506 507* Support for the sh-symbianelf target added. 508 509* Added a pseudo-op (.secrel32) to generate 32 bit section relative relocations 510 on pe[i]-i386; required for this target's DWARF 2 support. 511 512* Support for Motorola MCF521x/5249/547x/548x added. 513 514* Support for ColdFire EMAC instructions added and Motorola syntax for MAC/EMAC 515 instrucitons. 516 517* New command-line option -mno-shared for MIPS ELF targets. 518 519* New command-line option --alternate and pseudo-ops .altmacro and .noaltmacro 520 added to enter (and leave) alternate macro syntax mode. 521 522Changes in 2.15: 523 524* The MIPS -membedded-pic option (Embedded-PIC code generation) is 525 deprecated and will be removed in a future release. 526 527* Added PIC m32r Linux (ELF) and support to M32R assembler. 528 529* Added support for ARM V6. 530 531* Added support for sh4a and variants. 532 533* Support for Renesas M32R2 added. 534 535* Limited support for Mapping Symbols as specified in the ARM ELF 536 specification has been added to the arm assembler. 537 538* On ARM architectures, added a new gas directive ".unreq" that undoes 539 definitions created by ".req". 540 541* Support for Motorola ColdFire MCF528x added. 542 543* Added --gstabs+ switch to enable the generation of STABS debug format 544 information with GNU extensions. 545 546* Added support for MIPS64 Release 2. 547 548* Added support for v850e1. 549 550* Added -n switch for x86 assembler. By default, x86 GAS replaces 551 multiple nop instructions used for alignment within code sections 552 with multi-byte nop instructions such as leal 0(%esi,1),%esi. This 553 switch disables the optimization. 554 555* Removed -n option from MIPS assembler. It was not useful, and confused the 556 existing -non_shared option. 557 558Changes in 2.14: 559 560* Added support for MIPS32 Release 2. 561 562* Added support for Xtensa architecture. 563 564* Support for Intel's iWMMXt processor (an ARM variant) added. 565 566* An assembler test generator has been contributed and an example file that 567 uses it (gas/testsuite/gas/all/test-gen.c and test-exmaple.c). 568 569* Support for SH2E added. 570 571* GASP has now been removed. 572 573* Support for Texas Instruments TMS320C4x and TMS320C3x series of 574 DSP's contributed by Michael Hayes and Svein E. Seldal. 575 576* Support for the Ubicom IP2xxx microcontroller added. 577 578Changes in 2.13: 579 580* Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400 581 and FR500 included. 582 583* Support for DLX processor added. 584 585* GASP has now been deprecated and will be removed in a future release. Use 586 the macro facilities in GAS instead. 587 588* GASP now correctly parses floating point numbers. Unless the base is 589 explicitly specified, they are interpreted as decimal numbers regardless of 590 the currently specified base. 591 592Changes in 2.12: 593 594* Support for Don Knuth's MMIX, by Hans-Peter Nilsson. 595 596* Support for the OpenRISC 32-bit embedded processor by OpenCores. 597 598* The ARM assembler now accepts -march=..., -mcpu=... and -mfpu=... for 599 specifying the target instruction set. The old method of specifying the 600 target processor has been deprecated, but is still accepted for 601 compatibility. 602 603* Support for the VFP floating-point instruction set has been added to 604 the ARM assembler. 605 606* New psuedo op: .incbin to include a set of binary data at a given point 607 in the assembly. Contributed by Anders Norlander. 608 609* The MIPS assembler now accepts -march/-mtune. -mcpu has been deprecated 610 but still works for compatability. 611 612* The MIPS assembler no longer issues a warning by default when it 613 generates a nop instruction from a macro. The new command-line option 614 -n will turn on the warning. 615 616Changes in 2.11: 617 618* Support for PDP-11 and 2.11BSD a.out format, by Lars Brinkhoff. 619 620* x86 gas now supports the full Pentium4 instruction set. 621 622* Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs. 623 624* Support for Motorola 68HC11 and 68HC12. 625 626* Support for Texas Instruments TMS320C54x (tic54x). 627 628* Support for IA-64. 629 630* Support for i860, by Jason Eckhardt. 631 632* Support for CRIS (Axis Communications ETRAX series). 633 634* x86 gas has a new .arch pseudo op to specify the target CPU architecture. 635 636* x86 gas -q command-line option quietens warnings about register size changes 637 due to suffix, indirect jmp/call without `*', stand-alone prefixes, and 638 translating various deprecated floating point instructions. 639 640Changes in 2.10: 641 642* Support for the ARM msr instruction was changed to only allow an immediate 643 operand when altering the flags field. 644 645* Support for ATMEL AVR. 646 647* Support for IBM 370 ELF. Somewhat experimental. 648 649* Support for numbers with suffixes. 650 651* Added support for breaking to the end of repeat loops. 652 653* Added support for parallel instruction syntax (DOUBLEBAR_PARALLEL). 654 655* New .elseif pseudo-op added. 656 657* New --fatal-warnings option. 658 659* picoJava architecture support added. 660 661* Motorola MCore 210 processor support added. 662 663* A new pseudo-op .intel_syntax has been implemented to allow gas to parse i386 664 assembly programs with intel syntax. 665 666* New pseudo-ops .func,.endfunc to aid in debugging user-written assembler code. 667 668* Added -gdwarf2 option to generate DWARF 2 debugging information. 669 670* Full 16-bit mode support for i386. 671 672* Greatly improved instruction operand checking for i386. This change will 673 produce errors or warnings on incorrect assembly code that previous versions 674 of gas accepted. If you get unexpected messages from code that worked with 675 older versions of gas, please double check the code before reporting a bug. 676 677* Weak symbol support added for COFF targets. 678 679* Mitsubishi D30V support added. 680 681* Texas Instruments c80 (tms320c80) support added. 682 683* i960 ELF support added. 684 685* ARM ELF support added. 686 687Changes in 2.9: 688 689* Texas Instruments c30 (tms320c30) support added. 690 691* The assembler now optimizes the exception frame information generated by egcs 692 and gcc 2.8. The new --traditional-format option disables this optimization. 693 694* Added --gstabs option to generate stabs debugging information. 695 696* The -a option takes a new suboption, m (e.g., -alm) to expand macros in a 697 listing. 698 699* Added -MD option to print dependencies. 700 701Changes in 2.8: 702 703* BeOS support added. 704 705* MIPS16 support added. 706 707* Motorola ColdFire 5200 support added (configure for m68k and use -m5200). 708 709* Alpha/VMS support added. 710 711* m68k options --base-size-default-16, --base-size-default-32, 712 --disp-size-default-16, and --disp-size-default-32 added. 713 714* The alignment directives now take an optional third argument, which is the 715 maximum number of bytes to skip. If doing the alignment would require 716 skipping more than the given number of bytes, the alignment is not done at 717 all. 718 719* The ELF assembler has a new pseudo-op, .symver, used for symbol versioning. 720 721* The -a option takes a new suboption, c (e.g., -alc), to skip false 722 conditionals in listings. 723 724* Added new pseudo-op, .equiv; it's like .equ, except that it is an error if 725 the symbol is already defined. 726 727Changes in 2.7: 728 729* The PowerPC assembler now allows the use of symbolic register names (r0, 730 etc.) if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.) 731 can be used any time. PowerPC 860 move to/from SPR instructions have been 732 added. 733 734* Alpha Linux (ELF) support added. 735 736* PowerPC ELF support added. 737 738* m68k Linux (ELF) support added. 739 740* i960 Hx/Jx support added. 741 742* i386/PowerPC gnu-win32 support added. 743 744* SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the 745 default is to build COFF-only support. To get a set of tools that generate 746 ELF (they'll understand both COFF and ELF), you must configure with 747 target=i386-unknown-sco3.2v5elf. 748 749* m88k-motorola-sysv3* support added. 750 751Changes in 2.6: 752 753* Gas now directly supports macros, without requiring GASP. 754 755* Gas now has an MRI assembler compatibility mode. Use -M or --mri to select 756 MRI mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the 757 ``.mri 0'' is seen; this can be convenient for inline assembler code. 758 759* Added --defsym SYM=VALUE option. 760 761* Added -mips4 support to MIPS assembler. 762 763* Added PIC support to Solaris and SPARC SunOS 4 assembler. 764 765Changes in 2.4: 766 767* Converted this directory to use an autoconf-generated configure script. 768 769* ARM support, from Richard Earnshaw. 770 771* Updated VMS support, from Pat Rankin, including considerably improved 772 debugging support. 773 774* Support for the control registers in the 68060. 775 776* Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to 777 provide for possible future gcc changes, for targets where gas provides some 778 features not available in the native assembler. If the native assembler is 779 used, it should become obvious pretty quickly what the problem is. 780 781* Usage message is available with "--help". 782 783* The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3 784 also, but didn't get into the NEWS file.) 785 786* Weak symbol support for a.out. 787 788* A bug in the listing code which could cause an infinite loop has been fixed. 789 Bugs in listings when generating a COFF object file have also been fixed. 790 791* Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by 792 Paul Kranenburg. 793 794* Improved Alpha support. Immediate constants can have a much larger range 795 now. Support for the 21164 has been contributed by Digital. 796 797* Updated ns32k (pc532-mach, netbsd532) support from Ian Dall. 798 799Changes in 2.3: 800 801* Mach i386 support, by David Mackenzie and Ken Raeburn. 802 803* RS/6000 and PowerPC support by Ian Taylor. 804 805* VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit, 806 based on mail received from various people. The `-h#' option should work 807 again too. 808 809* HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work 810 with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special 811 version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve 812 this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu 813 in the "dist" directory. 814 815* Vax support in gas fixed for BSD, so it builds and seems to run a couple 816 simple tests okay. I haven't put it through extensive testing. (GNU make is 817 currently required for BSD 4.3 builds.) 818 819* Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is 820 based on code donated by CMU, which used an a.out-based format. I'm afraid 821 the alpha-a.out support is pretty badly mangled, and much of it removed; 822 making it work will require rewriting it as BFD support for the format anyways. 823 824* Irix 5 support. 825 826* The test suites have been fixed up a bit, so that they should work with a 827 couple different versions of expect and dejagnu. 828 829* Symbols' values are now handled internally as expressions, permitting more 830 flexibility in evaluating them in some cases. Some details of relocation 831 handling have also changed, and simple constant pool management has been 832 added, to make the Alpha port easier. 833 834* New option "--statistics" for printing out program run times. This is 835 intended to be used with the gcc "-Q" option, which prints out times spent in 836 various phases of compilation. (You should be able to get all of them 837 printed out with "gcc -Q -Wa,--statistics", I think.) 838 839Changes in 2.2: 840 841* RS/6000 AIX and MIPS SGI Irix 5 support has been added. 842 843* Configurations that are still in development (and therefore are convenient to 844 have listed in configure.in) still get rejected without a minor change to 845 gas/Makefile.in, so people not doing development work shouldn't get the 846 impression that support for such configurations is actually believed to be 847 reliable. 848 849* The program name (usually "as") is printed when a fatal error message is 850 displayed. This should prevent some confusion about the source of occasional 851 messages about "internal errors". 852 853* ELF support is falling into place. Support for the 386 should be working. 854 Support for SPARC Solaris is in. HPPA support from Utah is being integrated. 855 856* Symbol values are maintained as expressions instead of being immediately 857 boiled down to add-symbol, sub-symbol, and constant. This permits slightly 858 more complex calculations involving symbols whose values are not alreadey 859 known. 860 861* DBX-style debugging info ("stabs") is now supported for COFF formats. 862 If any stabs directives are seen in the source, GAS will create two new 863 sections: a ".stab" and a ".stabstr" section. The format of the .stab 864 section is nearly identical to the a.out symbol format, and .stabstr is 865 its string table. For this to be useful, you must have configured GCC 866 to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB 867 that can use the stab sections (4.11 or later). 868 869* LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS 870 support is in progress. 871 872Changes in 2.1: 873 874* Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been 875 incorporated, but not well tested yet. 876 877* Altered the opcode table split for m68k; it should require less VM to compile 878 with gcc now. 879 880* Some minor adjustments to add (Convergent Technologies') Miniframe support, 881 suggested by Ronald Cole. 882 883* HPPA support (running OSF only, not HPUX) has been contributed by Utah. This 884 includes improved ELF support, which I've started adapting for SPARC Solaris 885 2.x. Integration isn't completely, so it probably won't work. 886 887* HP9000/300 support, donated by HP, has been merged in. 888 889* Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support. 890 891* Better error messages for unsupported configurations (e.g., hppa-hpux). 892 893* Test suite framework is starting to become reasonable. 894 895Changes in 2.0: 896 897* Mostly bug fixes. 898 899* Some more merging of BFD and ELF code, but ELF still doesn't work. 900 901Changes in 1.94: 902 903* BFD merge is partly done. Adventurous souls may try giving configure the 904 "--with-bfd-assembler" option. Currently, ELF format requires it, a.out 905 format accepts it; SPARC CPU accepts it. It's the default only for OS "elf" 906 or "solaris". (ELF isn't really supported yet. It needs work. I've got 907 some code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not 908 fully merged yet.) 909 910* The 68K opcode table has been split in half. It should now compile under gcc 911 without consuming ridiculous amounts of memory. 912 913* A couple data structures have been reduced in size. This should result in 914 saving a little bit of space at runtime. 915 916* Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF 917 code provided ROSE format support, which I haven't merged in yet. (I can 918 make it available, if anyone wants to try it out.) Ralph's code, for BSD 919 4.4, supports a.out format. We don't have ECOFF support in just yet; it's 920 coming. 921 922* Support for the Hitachi H8/500 has been added. 923 924* VMS host and target support should be working now, thanks chiefly to Eric 925 Youngdale. 926 927Changes in 1.93.01: 928 929* For m68k, support for more processors has been added: 68040, CPU32, 68851. 930 931* For i386, .align is now power-of-two; was number-of-bytes. 932 933* For m68k, "%" is now accepted before register names. For COFF format, which 934 doesn't use underscore prefixes for C labels, it is required, so variable "a0" 935 can be distinguished from the register. 936 937* Last public release was 1.38. Lots of configuration changes since then, lots 938 of new CPUs and formats, lots of bugs fixed. 939 940 941Copyright (C) 2012-2022 Free Software Foundation, Inc. 942 943Copying and distribution of this file, with or without modification, 944are permitted in any medium without royalty provided the copyright 945notice and this notice are preserved. 946 947Local variables: 948fill-column: 79 949End: 950