2 \# NASM revision history in nasmdoc format
5 \H{cl-2.xx} NASM 2 Series
7 The NASM 2 series supports x86-64, and is the production version of NASM
11 \S{cl-2.12.02} Version 2.12.02
13 \b Fix preprocessor errors, especially \c{%error} and \c{%warning},
14 inside \c{%if} statements.
16 \b Fix relative relocations in 32-bit Mach-O.
18 \b More Codeview debug format fixes.
20 \b If the MASM PTR keyword is encountered, issue a warning. This is
21 much more likely to indicate a MASM-ism encountered in NASM than it
22 is a valid label. This warning can be suppressed with \c{-w-ptr},
23 the \c{[warning]} directive (see \k{opt-w}) or by the macro
24 definition \c{%idefine ptr %??}.
26 \b When an error or a warning comes from the expansion of a multi-line
27 macro, display the file and line numbers for the expanded macros.
28 Macros defined with \c{.nolist} do not get displayed.
31 \S{cl-2.12.01} Version 2.12.01
33 \b Portability fixes for some platforms.
35 \b Fix error when not specifying a list file.
37 \b Correct the handling of macro-local labels in the Codeview
40 \b Add \c{CLZERO}, \c{MONITORX} and \c{MWAITX} instructions.
43 \S{cl-2.12} Version 2.12
45 \b Major fixes to the \c{macho} backend (\k{machofmt}); earlier versions
46 would produce invalid symbols and relocations on a regular basis.
48 \b Support for thread-local storage in Mach-O.
50 \b Support for arbitrary sections in Mach-O.
52 \b Fix wrong negative size treated as a big positive value passed into
53 backend causing NASM to crash.
55 \b Fix handling of zero-extending unsigned relocations, we have been printing
56 wrong message and forgot to assign segment with predefined value before
57 passing it into output format.
59 \b Fix potential write of oversized (with size greater than allowed in
60 output format) relative relocations.
62 \b Portability fixes for building NASM with LLVM compiler.
64 \b Add support of Codeview version 8 (\c{cv8}) debug format for
65 \c{win32} and \c{win64} formats in the \c{COFF} backend,
68 \b Allow 64-bit outputs in 16/32-bit only backends. Unsigned 64-bit
69 relocations are zero-extended from 32-bits with a warning
70 (suppressible via \c{-w-zext-reloc}); signed 64-bit relocations are
73 \b Line numbers in list files now correspond to the lines in the source
74 files, instead of simply being sequential.
76 \b There is now an official 64-bit (x64 a.k.a. x86-64) build for Windows.
79 \S{cl-2.11.09} Version 2.11.09
81 \b Fix potential stack overwrite in \c{macho32} backend.
83 \b Fix relocation records in \c{macho64} backend.
85 \b Fix symbol lookup computation in \c{macho64} backend.
87 \b Adjust \c{.symtab} and \c{.rela.text} sections alignments to 8 bytes
90 \b Fix section length computation in \c{bin} backend which leaded in incorrect
93 \S{cl-2.11.08} Version 2.11.08
95 \b Fix section length computation in \c{bin} backend which leaded in incorrect
98 \b Add a warning for numeric preprocessor definitions passed via command
99 line which might have unexpected results otherwise.
101 \b Add ability to specify a module name record in \c{rdoff} linker with
104 \b Increase label length capacity up to 256 bytes in \c{rdoff} backend for
105 FreePascal sake, which tends to generate very long labels for procedures.
107 \b Fix segmentation failure when rip addressing is used in \c{macho64} backend.
109 \b Fix access on out of memory when handling strings with a single
110 grave. We have sixed similar problem in previous release but not
111 all cases were covered.
113 \b Fix NULL dereference in disassembled on \c{BND} instruction.
115 \S{cl-2.11.07} Version 2.11.07
117 \b Fix 256 bit \c{VMOVNTPS} instruction.
119 \b Fix \c{-MD} option handling, which was rather broken in previous
120 release changing command line api.
122 \b Fix access to unitialized space when handling strings with
125 \b Fix nil dereference in handling memory reference parsing.
127 \S{cl-2.11.06} Version 2.11.06
129 \b Update AVX512 instructions based on the Extension Reference (319433-021 Sept
132 \b Fix the behavior of \c{-MF} and \c{-MD} options (Bugzilla 3392280)
134 \b Updated Win32 Makefile to fix issue with build
136 \S{cl-2.11.05} Version 2.11.05
138 \b Add \c{--v} as an alias for \c{-v} (see \k{opt-v}), for
139 command-line compatibility with Yasm.
141 \b Fix a bug introduced in 2.11.03 whereby certain instructions would
142 contain multiple REX prefixes, and thus be corrupt.
144 \S{cl-2.11.04} Version 2.11.04
146 \b Removed an invalid error checking code. Sometimes a memref only with
147 a displacement can also set an evex flag. For example:
149 \c vmovdqu32 [0xabcd]{k1}, zmm0
151 \b Fixed a bug in disassembler that EVEX.L'L vector length was not matched
152 when EVEX.b was set because it was simply considered as EVEC.RC.
153 Separated EVEX.L'L case from EVEX.RC which is ignored in matching.
155 \S{cl-2.11.03} Version 2.11.03
157 \b Fix a bug there REX prefixes were missing on instructions inside a
160 \S{cl-2.11.02} Version 2.11.02
162 \b Add the \c{XSAVEC}, \c{XSAVES} and \c{XRSTORS} family instructions.
164 \b Add the \c{CLFLUSHOPT} instruction.
166 \S{cl-2.11.01} Version 2.11.01
168 \b Allow instructions which implicitly uses \c{XMM0} (\c{VBLENDVPD},
169 \c{VBLENDVPS}, \c{PBLENDVB} and \c{SHA256RNDS2}) to be specified
170 without an explicit \c{xmm0} on the assembly line. In other words,
171 the following two lines produce the same output:
173 \c vblendvpd xmm2,xmm1,xmm0 ; Last operand is fixed xmm0
174 \c vblendvpd xmm2,xmm1 ; Implicit xmm0 omitted
176 \b In the ELF backends, don't crash the assembler if \c{section align}
177 is specified without a value.
179 \S{cl-2.11} Version 2.11
181 \b Add support for the Intel AVX-512 instruction set:
183 \b 16 new, 512-bit SIMD registers. Total 32 \c{(ZMM0 ~ ZMM31)}
185 \b 8 new opmask registers \c{(K0 ~ K7)}. One of 7 registers \c{(K1 ~ K7)} can
186 be used as an opmask for conditional execution.
188 \b A new EVEX encoding prefix. EVEX is based on VEX and provides more
189 capabilities: opmasks, broadcasting, embedded rounding and compressed
193 \c VDIVPD zmm0{k1}{z}, zmm1, zmm3 ; conditional vector operation
194 \c ; using opmask k1.
195 \c ; {z} is for zero-masking
197 \c VDIVPS zmm4, zmm5, [rbx]{1to16} ; load single-precision float and
198 \c ; replicate it 16 times. 32 * 16 = 512
199 \c - embedded rounding
200 \c VCVTSI2SD xmm6, xmm7, {rz-sae}, rax ; round toward zero. note that it
201 \c ; is used as if a separate operand.
202 \c ; it comes after the last SIMD operand
204 \b Add support for \c{ZWORD} (512 bits), \c{DZ} and \c{RESZ}.
206 \b Add support for the MPX and SHA instruction sets.
208 \b Better handling of section redefinition.
210 \b Generate manpages when running \c{'make dist'}.
212 \b Handle all token chains in mmacro params range.
214 \b Support split [base,index] effective address:
216 \c mov eax,[eax+8,ecx*4] ; eax=base, ecx=index, 4=scale, 8=disp
218 This is expected to be most useful for the MPX instructions.
220 \b Support \c{BND} prefix for branch instructions (for MPX).
222 \b The \c{DEFAULT} directive can now take \c{BND} and \c{NOBND}
223 options to indicate whether all relevant branches should be getting
224 \c{BND} prefixes. This is expected to be the normal for use in MPX
227 \b Add \c{{evex}}, \c{{vex3}} and \c{{vex2}} instruction prefixes to
228 have NASM encode the corresponding instruction, if possible, with an EVEX,
229 3-byte VEX, or 2-byte VEX prefix, respectively.
231 \b Support for section names longer than 8 bytes in Win32/Win64 COFF.
233 \b The \c{NOSPLIT} directive by itself no longer forces a single
234 register to become an index register, unless it has an explicit
237 \c mov eax,[nosplit eax] ; eax as base register
238 \c mov eax,[nosplit eax*1] ; eax as index register
240 \S{cl-2.10.09} Version 2.10.09
242 \b Pregenerate man pages.
244 \S{cl-2.10.08} Version 2.10.08
246 \b Fix \c{VMOVNTDQA}, \c{MOVNTDQA} and \c{MOVLPD} instructions.
248 \b Fix collision for \c{VGATHERQPS}, \c{VPGATHERQD} instructions.
250 \b Fix \c{VPMOVSXBQ}, \c{VGATHERQPD}, \c{VSPLLW} instructions.
252 \b Add a bunch of AMD TBM instructions.
254 \b Fix potential stack overwrite in numbers conversion.
256 \b Allow byte size in \c{PREFETCHTx} instructions.
258 \b Make manual pages up to date.
260 \b Make \c{F3} and \c{F2} SSE prefixes to override \c{66}.
262 \b Support of AMD SVM instructions in 32 bit mode.
264 \b Fix near offsets code generation for \c{JMP}, \c{CALL} instrictions
267 \b Fix preprocessor parse regression when id is expanding to a whitespace.
269 \S{cl-2.10.07} Version 2.10.07
271 \b Fix line continuation parsing being broken in previous version.
273 \S{cl-2.10.06} Version 2.10.06
275 \b Always quote the dependency source names when using the automatic
276 dependency generation options.
278 \b If no dependency target name is specified via the \c{-MT} or
279 \c{-MQ} options, quote the default output name.
281 \b Fix assembly of shift operations in \c{CPU 8086} mode.
283 \b Fix incorrect generation of explicit immediate byte for shift by 1
284 under certain circumstances.
286 \b Fix assembly of the \c{VPCMPGTQ} instruction.
288 \b Fix RIP-relative relocations in the \c{macho64} backend.
290 \S{cl-2.10.05} Version 2.10.05
292 \b Add the \c{CLAC} and \c{STAC} instructions.
294 \S{cl-2.10.04} Version 2.10.04
296 \b Add back the inadvertently deleted 256-bit version of the \c{VORPD}
299 \b Correct disassembly of instructions starting with byte \c{82} hex.
301 \b Fix corner cases in token pasting, for example:
303 \c %define N 1e%++%+ 5
306 \S{cl-2.10.03} Version 2.10.03
308 \b Correct the assembly of the instruction:
310 \c XRELEASE MOV [absolute],AL
312 Previous versions would incorrectly generate \c{F3 A2} for this
313 instruction and issue a warning; correct behavior is to emit \c{F3 88
316 \S{cl-2.10.02} Version 2.10.02
318 \b Add the \c{ifunc} macro package with integer functions, currently
319 only integer logarithms. See \k{pkg_ifunc}.
321 \b Add the \c{RDSEED}, \c{ADCX} and \c{ADOX} instructions.
323 \S{cl-2.10.01} Version 2.10.01
325 \b Add missing VPMOVMSKB instruction with reg32, ymmreg operands.
327 \S{cl-2.10} Version 2.10
329 \b When optimization is enabled, \c{mov r64,imm} now optimizes to the
330 shortest form possible between:
332 \c mov r32,imm32 ; 5 bytes
333 \c mov r64,imm32 ; 7 bytes
334 \c mov r64,imm64 ; 10 bytes
336 To force a specific form, use the \c{STRICT} keyword, see \k{strict}.
338 \b Add support for the Intel AVX2 instruction set.
340 \b Add support for Bit Manipulation Instructions 1 and 2.
342 \b Add support for Intel Transactional Synchronization Extensions (TSX).
344 \b Add support for x32 ELF (32-bit ELF with the CPU in 64-bit mode.)
347 \b Add support for bigendian UTF-16 and UTF-32. See \k{unicode}.
349 \S{cl-2.09.10} Version 2.09.10
351 \b Fix up NSIS script to protect uninstaller against registry keys
352 absence or corruption. It brings in a few additional questions
353 to a user during deinstallation procedure but still it is better
354 than unpredictable file removal.
356 \S{cl-2.09.09} Version 2.09.09
358 \b Fix initialization of section attributes of \c{bin} output format.
360 \b Fix \c{mach64} output format bug that crashes NASM due to NULL symbols.
363 \S{cl-2.09.08} Version 2.09.08
365 \b Fix \c{__OUTPUT_FORMAT__} assignment when output driver alias
366 is used. For example when \c{-f elf} is used \c{__OUTPUT_FORMAT__}
367 must be set to \c{elf}, if \c{-f elf32} is used \c{__OUTPUT_FORMAT__}
368 must be assigned accordingly, i.e. to \c{elf32}. The rule applies to
369 all output driver aliases. See \k{ofmtm}.
372 \S{cl-2.09.07} Version 2.09.07
374 \b Fix attempts to close same file several times
375 when \c{-a} option is used.
377 \b Fixes for VEXTRACTF128, VMASKMOVPS encoding.
380 \S{cl-2.09.06} Version 2.09.06
382 \b Fix missed section attribute initialization in \c{bin} output target.
385 \S{cl-2.09.05} Version 2.09.05
387 \b Fix arguments encoding for VPEXTRW instruction.
389 \b Remove invalid form of VPEXTRW instruction.
391 \b Add \c{VLDDQU} as alias for \c{VLDQQU} to
395 \S{cl-2.09.04} Version 2.09.04
397 \b Fix incorrect labels offset for VEX intructions.
399 \b Eliminate bogus warning on implicit operand size override.
401 \b \c{%if} term could not handle 64 bit numbers.
403 \b The COFF backend was limiting relocations number to 16 bits even if
404 in real there were a way more relocations.
407 \S{cl-2.09.03} Version 2.09.03
409 \b Print \c{%macro} name inside \c{%rep} blocks on error.
411 \b Fix preprocessor expansion behaviour. It happened sometime
412 too early and sometime simply wrong. Move behaviour back to
413 the origins (down to NASM 2.05.01).
415 \b Fix unitialized data dereference on OMF output format.
417 \b Issue warning on unterminated \c{%{} construct.
419 \b Fix for documentation typo.
422 \S{cl-2.09.02} Version 2.09.02
424 \b Fix reversed tokens when \c{%deftok} produces more than one output token.
426 \b Fix segmentation fault on disassembling some VEX instructions.
428 \b Missing \c{%endif} did not always cause error.
430 \b Fix typo in documentation.
432 \b Compound context local preprocessor single line macro identifiers
433 were not expanded early enough and as result lead to unresolved
437 \S{cl-2.09.01} Version 2.09.01
439 \b Fix NULL dereference on missed %deftok second parameter.
441 \b Fix NULL dereference on invalid %substr parameters.
444 \S{cl-2.09} Version 2.09
446 \b Fixed assignment the magnitude of \c{%rep} counter. It is limited
449 \b Fixed NULL dereference if argument of \c{%strlen} resolves
450 to whitespace. For example if nonexistent macro parameter is used.
452 \b \c{%ifenv}, \c{%elifenv}, \c{%ifnenv}, and \c{%elifnenv} directives
453 introduced. See \k{ifenv}.
455 \b Fixed NULL dereference if environment variable is missed.
457 \b Updates of new AVX v7 Intel instructions.
459 \b \c{PUSH imm32} is now officially documented.
461 \b Fix for encoding the LFS, LGS and LSS in 64-bit mode.
463 \b Fixes for compatibility with OpenWatcom compiler and DOS 8.3 file
466 \b Macros parameters range expansion introduced. See \k{mlmacrange}.
468 \b Backward compatibility on expanging of local sigle macros restored.
470 \b 8 bit relocations for \c{elf} and \c{bin} output formats are introduced.
472 \b Short intersegment jumps are permitted now.
474 \b An alignment more than 64 bytes are allowed for \c{win32},
475 \c{win64} output formats.
477 \b \c{SECTALIGN} directive introduced. See \k{sectalign}.
479 \b \c{nojmp} option introduced in \c{smartalign} package. See
482 \b Short aliases \c{win}, \c{elf} and \c{macho} for output formats are
483 introduced. Each stands for \c{win32}, \c{elf32} and \c{macho32}
486 \b Faster handling of missing directives implemented.
488 \b Various small improvements in documentation.
490 \b No hang anymore if unable to open malloc.log file.
492 \b The environments without vsnprintf function are able to build nasm again.
494 \b AMD LWP instructions updated.
496 \b Tighten EA checks. We warn a user if there overflow in EA addressing.
498 \b Make \c{-Ox} the default optimization level. For the legacy
499 behavior, specify \c{-O0} explicitly. See \k{opt-O}.
501 \b Environment variables read with \c{%!} or tested with \c{%ifenv}
502 can now contain non-identifier characters if surrounded by quotes.
505 \b Add a new standard macro package \c{%use fp} for floating-point
506 convenience macros. See \k{pkg_fp}.
509 \S{cl-2.08.02} Version 2.08.02
511 \b Fix crash under certain circumstances when using the \c{%+} operator.
514 \S{cl-2.08.01} Version 2.08.01
516 \b Fix the \c{%use} statement, which was broken in 2.08.
519 \S{cl-2.08} Version 2.08
521 \b A number of enhancements/fixes in macros area.
523 \b Support for converting strings to tokens. See \k{deftok}.
525 \b Fuzzy operand size logic introduced.
527 \b Fix COFF stack overrun on too long export identifiers.
529 \b Fix Macho-O alignment bug.
531 \b Fix crashes with -fwin32 on file with many exports.
533 \b Fix stack overrun for too long [DEBUG id].
535 \b Fix incorrect sbyte usage in IMUL (hit only if optimization
538 \b Append ending token for \c{.stabs} records in the ELF output format.
540 \b New NSIS script which uses ModernUI and MultiUser approach.
542 \b Visual Studio 2008 NASM integration (rules file).
544 \b Warn a user if a constant is too long (and as result will be stripped).
546 \b The obsoleted pre-XOP AMD SSE5 instruction set which was never actualized
549 \b Fix stack overrun on too long error file name passed from the command line.
551 \b Bind symbols to the .text section by default (ie in case if SECTION
552 directive was omitted) in the ELF output format.
554 \b Fix sync points array index wrapping.
556 \b A few fixes for FMA4 and XOP instruction templates.
558 \b Add AMD Lightweight Profiling (LWP) instructions.
560 \b Fix the offset for \c{%arg} in 64-bit mode.
562 \b An undefined local macro (\c{%$}) no longer matches a global macro
565 \b Fix NULL dereference on too long local labels.
568 \S{cl-2.07} Version 2.07
570 \b NASM is now under the 2-clause BSD license. See \k{legal}.
572 \b Fix the section type for the \c{.strtab} section in the \c{elf64}
575 \b Fix the handling of \c{COMMON} directives in the \c{obj} output format.
577 \b New \c{ith} and \c{srec} output formats; these are variants of the
578 \c{bin} output format which output Intel hex and Motorola S-records,
579 respectively. See \k{ithfmt} and \k{srecfmt}.
581 \b \c{rdf2ihx} replaced with an enhanced \c{rdf2bin}, which can output
582 binary, COM, Intel hex or Motorola S-records.
584 \b The Windows installer now puts the NASM directory first in the
585 \c{PATH} of the "NASM Shell".
587 \b Revert the early expansion behavior of \c{%+} to pre-2.06 behavior:
588 \c{%+} is only expanded late.
590 \b Yet another Mach-O alignment fix.
592 \b Don't delete the list file on errors. Also, include error and
593 warning information in the list file.
595 \b Support for 64-bit Mach-O output, see \k{machofmt}.
597 \b Fix assert failure on certain operations that involve strings with
601 \S{cl-2.06} Version 2.06
603 \b This release is dedicated to the memory of Charles A. Crayne, long
604 time NASM developer as well as moderator of \c{comp.lang.asm.x86} and
605 author of the book \e{Serious Assembler}. We miss you, Chuck.
607 \b Support for indirect macro expansion (\c{%[...]}). See \k{indmacro}.
609 \b \c{%pop} can now take an argument, see \k{pushpop}.
611 \b The argument to \c{%use} is no longer macro-expanded. Use
612 \c{%[...]} if macro expansion is desired.
614 \b Support for thread-local storage in ELF32 and ELF64. See \k{elftls}.
616 \b Fix crash on \c{%ifmacro} without an argument.
618 \b Correct the arguments to the \c{POPCNT} instruction.
620 \b Fix section alignment in the Mach-O format.
622 \b Update AVX support to version 5 of the Intel specification.
624 \b Fix the handling of accesses to context-local macros from higher
625 levels in the context stack.
627 \b Treat \c{WAIT} as a prefix rather than as an instruction, thereby
628 allowing constructs like \c{O16 FSAVE} to work correctly.
630 \b Support for structures with a non-zero base offset. See \k{struc}.
632 \b Correctly handle preprocessor token concatenation (see \k{concat})
633 involving floating-point numbers.
635 \b The \c{PINSR} series of instructions have been corrected and
638 \b Removed AMD SSE5, replaced with the new XOP/FMA4/CVT16 (rev 3.03)
641 \b The ELF backends no longer automatically generate a \c{.comment} section.
643 \b Add additional "well-known" ELF sections with default attributes. See
647 \S{cl-2.05.01} Version 2.05.01
649 \b Fix the \c{-w}/\c{-W} option parsing, which was broken in NASM 2.05.
652 \S{cl-2.05} Version 2.05
654 \b Fix redundant REX.W prefix on \c{JMP reg64}.
656 \b Make the behaviour of \c{-O0} match NASM 0.98 legacy behavior.
659 \b \c{-w-user} can be used to suppress the output of \c{%warning} directives.
662 \b Fix bug where \c{ALIGN} would issue a full alignment datum instead of
665 \b Fix offsets in list files.
667 \b Fix \c{%include} inside multi-line macros or loops.
669 \b Fix error where NASM would generate a spurious warning on valid
670 optimizations of immediate values.
672 \b Fix arguments to a number of the \c{CVT} SSE instructions.
674 \b Fix RIP-relative offsets when the instruction carries an immediate.
676 \b Massive overhaul of the ELF64 backend for spec compliance.
678 \b Fix the Geode \c{PFRCPV} and \c{PFRSQRTV} instruction.
680 \b Fix the SSE 4.2 \c{CRC32} instruction.
683 \S{cl-2.04} Version 2.04
685 \b Sanitize macro handing in the \c{%error} directive.
687 \b New \c{%warning} directive to issue user-controlled warnings.
689 \b \c{%error} directives are now deferred to the final assembly phase.
691 \b New \c{%fatal} directive to immediately terminate assembly.
693 \b New \c{%strcat} directive to join quoted strings together.
695 \b New \c{%use} macro directive to support standard macro directives. See
698 \b Excess default parameters to \c{%macro} now issues a warning by default.
701 \b Fix \c{%ifn} and \c{%elifn}.
703 \b Fix nested \c{%else} clauses.
705 \b Correct the handling of nested \c{%rep}s.
707 \b New \c{%unmacro} directive to undeclare a multi-line macro.
710 \b Builtin macro \c{__PASS__} which expands to the current assembly pass.
713 \b \c{__utf16__} and \c{__utf32__} operators to generate UTF-16 and UTF-32
714 strings. See \k{unicode}.
716 \b Fix bug in case-insensitive matching when compiled on platforms that
717 don't use the \c{configure} script. Of the official release binaries,
718 that only affected the OS/2 binary.
720 \b Support for x87 packed BCD constants. See \k{bcdconst}.
722 \b Correct the \c{LTR} and \c{SLDT} instructions in 64-bit mode.
724 \b Fix unnecessary REX.W prefix on indirect jumps in 64-bit mode.
726 \b Add AVX versions of the AES instructions (\c{VAES}...).
728 \b Fix the 256-bit FMA instructions.
730 \b Add 256-bit AVX stores per the latest AVX spec.
732 \b VIA XCRYPT instructions can now be written either with or without
733 \c{REP}, apparently different versions of the VIA spec wrote them
736 \b Add missing 64-bit \c{MOVNTI} instruction.
738 \b Fix the operand size of \c{VMREAD} and \c{VMWRITE}.
740 \b Numerous bug fixes, especially to the AES, AVX and VTX instructions.
742 \b The optimizer now always runs until it converges. It also runs even
743 when disabled, but doesn't optimize. This allows most forward references
744 to be resolved properly.
746 \b \c{%push} no longer needs a context identifier; omitting the context
747 identifier results in an anonymous context.
750 \S{cl-2.03.01} Version 2.03.01
752 \b Fix buffer overflow in the listing module.
754 \b Fix the handling of hexadecimal escape codes in `...` strings.
756 \b The Postscript/PDF documentation has been reformatted.
758 \b The \c{-F} option now implies \c{-g}.
761 \S{cl-2.03} Version 2.03
763 \b Add support for Intel AVX, CLMUL and FMA instructions,
764 including YMM registers.
766 \b \c{dy}, \c{resy} and \c{yword} for 32-byte operands.
768 \b Fix some SSE5 instructions.
770 \b Intel \c{INVEPT}, \c{INVVPID} and \c{MOVBE} instructions.
772 \b Fix checking for critical expressions when the optimizer is enabled.
774 \b Support the DWARF debugging format for ELF targets.
776 \b Fix optimizations of signed bytes.
778 \b Fix operation on bigendian machines.
780 \b Fix buffer overflow in the preprocessor.
782 \b \c{SAFESEH} support for Win32, \c{IMAGEREL} for Win64 (SEH).
784 \b \c{%?} and \c{%??} to refer to the name of a macro itself. In particular,
785 \c{%idefine keyword $%?} can be used to make a keyword "disappear".
787 \b New options for dependency generation: \c{-MD}, \c{-MF},
788 \c{-MP}, \c{-MT}, \c{-MQ}.
790 \b New preprocessor directives \c{%pathsearch} and \c{%depend}; INCBIN
791 reimplemented as a macro.
793 \b \c{%include} now resolves macros in a sane manner.
795 \b \c{%substr} can now be used to get other than one-character substrings.
797 \b New type of character/string constants, using backquotes (\c{`...`}),
798 which support C-style escape sequences.
800 \b \c{%defstr} and \c{%idefstr} to stringize macro definitions before
803 \b Fix forward references used in \c{EQU} statements.
806 \S{cl-2.02} Version 2.02
808 \b Additional fixes for MMX operands with explicit \c{qword}, as well as
809 (hopefully) SSE operands with \c{oword}.
811 \b Fix handling of truncated strings with \c{DO}.
813 \b Fix segfaults due to memory overwrites when floating-point constants
816 \b Fix segfaults due to missing include files.
818 \b Fix OpenWatcom Makefiles for DOS and OS/2.
820 \b Add autogenerated instruction list back into the documentation.
822 \b ELF: Fix segfault when generating stabs, and no symbols have been
825 \b ELF: Experimental support for DWARF debugging information.
827 \b New compile date and time standard macros.
829 \b \c{%ifnum} now returns true for negative numbers.
831 \b New \c{%iftoken} test for a single token.
833 \b New \c{%ifempty} test for empty expansion.
835 \b Add support for the \c{XSAVE} instruction group.
837 \b Makefile for Netware/gcc.
839 \b Fix issue with some warnings getting emitted way too many times.
841 \b Autogenerated instruction list added to the documentation.
844 \S{cl-2.01} Version 2.01
846 \b Fix the handling of MMX registers with explicit \c{qword} tags on
847 memory (broken in 2.00 due to 64-bit changes.)
849 \b Fix the PREFETCH instructions.
851 \b Fix the documentation.
853 \b Fix debugging info when using \c{-f elf}
854 (backwards compatibility alias for \c{-f elf32}).
856 \b Man pages for rdoff tools (from the Debian project.)
858 \b ELF: handle large numbers of sections.
860 \b Fix corrupt output when the optimizer runs out of passes.
863 \S{cl-2.00} Version 2.00
865 \b Added c99 data-type compliance.
867 \b Added general x86-64 support.
869 \b Added win64 (x86-64 COFF) output format.
871 \b Added \c{__BITS__} standard macro.
873 \b Renamed the \c{elf} output format to \c{elf32} for clarity.
875 \b Added \c{elf64} and \c{macho} (MacOS X) output formats.
877 \b Added Numeric constants in \c{dq} directive.
879 \b Added \c{oword}, \c{do} and \c{reso} pseudo operands.
881 \b Allow underscores in numbers.
883 \b Added 8-, 16- and 128-bit floating-point formats.
885 \b Added binary, octal and hexadecimal floating-point.
887 \b Correct the generation of floating-point constants.
889 \b Added floating-point option control.
891 \b Added Infinity and NaN floating point support.
893 \b Added ELF Symbol Visibility support.
895 \b Added setting OSABI value in ELF header directive.
897 \b Added Generate Makefile Dependencies option.
899 \b Added Unlimited Optimization Passes option.
901 \b Added \c{%IFN} and \c{%ELIFN} support.
903 \b Added Logical Negation Operator.
905 \b Enhanced Stack Relative Preprocessor Directives.
907 \b Enhanced ELF Debug Formats.
909 \b Enhanced Send Errors to a File option.
911 \b Added SSSE3, SSE4.1, SSE4.2, SSE5 support.
913 \b Added a large number of additional instructions.
915 \b Significant performance improvements.
917 \b \c{-w+warning} and \c{-w-warning} can now be written as -Wwarning and
918 -Wno-warning, respectively. See \k{opt-w}.
920 \b Add \c{-w+error} to treat warnings as errors. See \k{opt-w}.
922 \b Add \c{-w+all} and \c{-w-all} to enable or disable all suppressible
923 warnings. See \k{opt-w}.
926 \H{cl-0.98.xx} NASM 0.98 Series
928 The 0.98 series was the production versions of NASM from 1999 to 2007.
931 \S{cl-0.98.39} Version 0.98.39
933 \b fix buffer overflow
935 \b fix outas86's \c{.bss} handling
937 \b "make spotless" no longer deletes config.h.in.
939 \b \c{%(el)if(n)idn} insensitivity to string quotes difference (#809300).
941 \b (nasm.c)\c{__OUTPUT_FORMAT__} changed to string value instead of symbol.
943 \S{cl-0.98.38} Version 0.98.38
946 \b Add Makefile for 16-bit DOS binaries under OpenWatcom, and modify
947 \c{mkdep.pl} to be able to generate completely pathless dependencies, as
948 required by OpenWatcom wmake (it supports path searches, but not
951 \b Fix the \c{STR} instruction.
953 \b Fix the ELF output format, which was broken under certain
954 circumstances due to the addition of stabs support.
956 \b Quick-fix Borland format debug-info for \c{-f obj}
958 \b Fix for \c{%rep} with no arguments (#560568)
960 \b Fix concatenation of preprocessor function call (#794686)
962 \b Fix long label causes coredump (#677841)
964 \b Use autoheader as well as autoconf to keep configure from generating
965 ridiculously long command lines.
967 \b Make sure that all of the formats which support debugging output
968 actually will suppress debugging output when \c{-g} not specified.
970 \S{cl-0.98.37} Version 0.98.37
973 \b Paths given in \c{-I} switch searched for \c{incbin}-ed as
974 well as \c{%include}-ed files.
976 \b Added stabs debugging for the ELF output format, patch from
979 \b Fix \c{output/outbin.c} to allow origin > 80000000h.
981 \b Make \c{-U} switch work.
983 \b Fix the use of relative offsets with explicit prefixes, e.g.
986 \b Remove \c{backslash()}.
988 \b Fix the \c{SMSW} and \c{SLDT} instructions.
990 \b \c{-O2} and \c{-O3} are no longer aliases for \c{-O10} and \c{-O15}.
991 If you mean the latter, please say so! :)
993 \S{cl-0.98.36} Version 0.98.36
996 \b Update rdoff - librarian/archiver - common rec - docs!
998 \b Fix signed/unsigned problems.
1000 \b Fix \c{JMP FAR label} and \c{CALL FAR label}.
1002 \b Add new multisection support - map files - fix align bug
1004 \b Fix sysexit, movhps/movlps reg,reg bugs in insns.dat
1006 \b \c{Q} or \c{O} suffixes indicate octal
1008 \b Support Prescott new instructions (PNI).
1010 \b Cyrix \c{XSTORE} instruction.
1013 \S{cl-0.98.35} Version 0.98.35
1015 \b Fix build failure on 16-bit DOS (Makefile.bc3 workaround for compiler bug.)
1017 \b Fix dependencies and compiler warnings.
1019 \b Add "const" in a number of places.
1021 \b Add -X option to specify error reporting format (use -Xvc to
1022 integrate with Microsoft Visual Studio.)
1024 \b Minor changes for code legibility.
1026 \b Drop use of tmpnam() in rdoff (security fix.)
1029 \S{cl-0.98.34} Version 0.98.34
1031 \b Correct additional address-size vs. operand-size confusions.
1033 \b Generate dependencies for all Makefiles automatically.
1035 \b Add support for unimplemented (but theoretically available)
1036 registers such as tr0 and cr5. Segment registers 6 and 7 are called
1037 segr6 and segr7 for the operations which they can be represented.
1039 \b Correct some disassembler bugs related to redundant address-size prefixes.
1040 Some work still remains in this area.
1042 \b Correctly generate an error for things like "SEG eax".
1044 \b Add the JMPE instruction, enabled by "CPU IA64".
1046 \b Correct compilation on newer gcc/glibc platforms.
1048 \b Issue an error on things like "jmp far eax".
1051 \S{cl-0.98.33} Version 0.98.33
1053 \b New __NASM_PATCHLEVEL__ and __NASM_VERSION_ID__ standard macros to
1054 round out the version-query macros. version.pl now understands
1055 X.YYplWW or X.YY.ZZplWW as a version number, equivalent to
1056 X.YY.ZZ.WW (or X.YY.0.WW, as appropriate).
1058 \b New keyword "strict" to disable the optimization of specific
1061 \b Fix the handing of size overrides with JMP instructions
1062 (instructions such as "jmp dword foo".)
1064 \b Fix the handling of "ABSOLUTE label", where "label" points into a
1065 relocatable segment.
1067 \b Fix OBJ output format with lots of externs.
1069 \b More documentation updates.
1071 \b Add -Ov option to get verbose information about optimizations.
1073 \b Undo a braindead change which broke \c{%elif} directives.
1075 \b Makefile updates.
1078 \S{cl-0.98.32} Version 0.98.32
1080 \b Fix NASM crashing when \c{%macro} directives were left unterminated.
1082 \b Lots of documentation updates.
1084 \b Complete rewrite of the PostScript/PDF documentation generator.
1086 \b The MS Visual C++ Makefile was updated and corrected.
1088 \b Recognize .rodata as a standard section name in ELF.
1090 \b Fix some obsolete Perl4-isms in Perl scripts.
1092 \b Fix configure.in to work with autoconf 2.5x.
1094 \b Fix a couple of "make cleaner" misses.
1096 \b Make the normal "./configure && make" work with Cygwin.
1099 \S{cl-0.98.31} Version 0.98.31
1101 \b Correctly build in a separate object directory again.
1103 \b Derive all references to the version number from the version file.
1105 \b New standard macros __NASM_SUBMINOR__ and __NASM_VER__ macros.
1107 \b Lots of Makefile updates and bug fixes.
1109 \b New \c{%ifmacro} directive to test for multiline macros.
1111 \b Documentation updates.
1113 \b Fixes for 16-bit OBJ format output.
1115 \b Changed the NASM environment variable to NASMENV.
1118 \S{cl-0.98.30} Version 0.98.30
1120 \b Changed doc files a lot: completely removed old READMExx and
1121 Wishlist files, incorporating all information in CHANGES and TODO.
1123 \b I waited a long time to rename zoutieee.c to (original) outieee.c
1125 \b moved all output modules to output/ subdirectory.
1127 \b Added 'make strip' target to strip debug info from nasm & ndisasm.
1129 \b Added INSTALL file with installation instructions.
1131 \b Added -v option description to nasm man.
1133 \b Added dist makefile target to produce source distributions.
1135 \b 16-bit support for ELF output format (GNU extension, but useful.)
1138 \S{cl-0.98.28} Version 0.98.28
1140 \b Fastcooked this for Debian's Woody release:
1141 Frank applied the INCBIN bug patch to 0.98.25alt and called
1142 it 0.98.28 to not confuse poor little apt-get.
1145 \S{cl-0.98.26} Version 0.98.26
1147 \b Reorganised files even better from 0.98.25alt
1150 \S{cl-0.98.25alt} Version 0.98.25alt
1152 \b Prettified the source tree. Moved files to more reasonable places.
1154 \b Added findleak.pl script to misc/ directory.
1156 \b Attempted to fix doc.
1159 \S{cl-0.98.25} Version 0.98.25
1161 \b Line continuation character \c{\\}.
1163 \b Docs inadvertantly reverted - "dos packaging".
1166 \S{cl-0.98.24p1} Version 0.98.24p1
1168 \b FIXME: Someone, document this please.
1171 \S{cl-0.98.24} Version 0.98.24
1173 \b Documentation - Ndisasm doc added to Nasm.doc.
1176 \S{cl-0.98.23} Version 0.98.23
1178 \b Attempted to remove rdoff version1
1180 \b Lino Mastrodomenico's patches to preproc.c (%$$ bug?).
1183 \S{cl-0.98.22} Version 0.98.22
1185 \b Update rdoff2 - attempt to remove v1.
1188 \S{cl-0.98.21} Version 0.98.21
1190 \b Optimization fixes.
1193 \S{cl-0.98.20} Version 0.98.20
1195 \b Optimization fixes.
1198 \S{cl-0.98.19} Version 0.98.19
1200 \b H. J. Lu's patch back out.
1203 \S{cl-0.98.18} Version 0.98.18
1205 \b Added ".rdata" to "-f win32".
1208 \S{cl-0.98.17} Version 0.98.17
1210 \b H. J. Lu's "bogus elf" patch. (Red Hat problem?)
1213 \S{cl-0.98.16} Version 0.98.16
1215 \b Fix whitespace before "[section ..." bug.
1218 \S{cl-0.98.15} Version 0.98.15
1220 \b Rdoff changes (?).
1222 \b Fix fixes to memory leaks.
1225 \S{cl-0.98.14} Version 0.98.14
1227 \b Fix memory leaks.
1230 \S{cl-0.98.13} Version 0.98.13
1232 \b There was no 0.98.13
1235 \S{cl-0.98.12} Version 0.98.12
1237 \b Update optimization (new function of "-O1")
1239 \b Changes to test/bintest.asm (?).
1242 \S{cl-0.98.11} Version 0.98.11
1244 \b Optimization changes.
1249 \S{cl-0.98.10} Version 0.98.10
1251 \b There was no 0.98.10
1254 \S{cl-0.98.09} Version 0.98.09
1256 \b Add multiple sections support to "-f bin".
1258 \b Changed GLOBAL_TEMP_BASE in outelf.c from 6 to 15.
1260 \b Add "-v" as an alias to the "-r" switch.
1262 \b Remove "#ifdef" from Tasm compatibility options.
1264 \b Remove redundant size-overrides on "mov ds, ex", etc.
1266 \b Fixes to SSE2, other insns.dat (?).
1268 \b Enable uppercase "I" and "P" switches.
1270 \b Case insinsitive "seg" and "wrt".
1272 \b Update install.sh (?).
1274 \b Allocate tokens in blocks.
1276 \b Improve "invalid effective address" messages.
1279 \S{cl-0.98.08} Version 0.98.08
1281 \b Add "\c{%strlen}" and "\c{%substr}" macro operators
1283 \b Fixed broken c16.mac.
1285 \b Unterminated string error reported.
1287 \b Fixed bugs as per 0.98bf
1290 \S{cl-0.98.09b with John Coffman patches released 28-Oct-2001} Version 0.98.09b with John Coffman patches released 28-Oct-2001
1292 Changes from 0.98.07 release to 98.09b as of 28-Oct-2001
1294 \b More closely compatible with 0.98 when -O0 is implied
1295 or specified. Not strictly identical, since backward
1296 branches in range of short offsets are recognized, and signed
1297 byte values with no explicit size specification will be
1298 assembled as a single byte.
1300 \b More forgiving with the PUSH instruction. 0.98 requires
1301 a size to be specified always. 0.98.09b will imply the size
1302 from the current BITS setting (16 or 32).
1304 \b Changed definition of the optimization flag:
1306 -O0 strict two-pass assembly, JMP and Jcc are
1307 handled more like 0.98, except that back-
1308 ward JMPs are short, if possible.
1310 -O1 strict two-pass assembly, but forward
1311 branches are assembled with code guaranteed
1312 to reach; may produce larger code than
1313 -O0, but will produce successful assembly
1314 more often if branch offset sizes are not
1317 -O2 multi-pass optimization, minimize branch
1318 offsets; also will minimize signed immed-
1319 iate bytes, overriding size specification.
1321 -O3 like -O2, but more passes taken, if needed
1324 \S{cl-0.98.07 released 01/28/01} Version 0.98.07 released 01/28/01
1326 \b Added Stepane Denis' SSE2 instructions to a *working*
1327 version of the code - some earlier versions were based on
1328 broken code - sorry 'bout that. version "0.98.07"
1334 \b Cosmetic modifications to nasm.c, nasm.h,
1338 \S{cl-0.98.06f released 01/18/01} Version 0.98.06f released 01/18/01
1341 \b - Add "metalbrain"s jecxz bug fix in insns.dat
1342 - alter nasmdoc.src to match - version "0.98.06f"
1345 \S{cl-0.98.06e released 01/09/01} Version 0.98.06e released 01/09/01
1348 \b Removed the "outforms.h" file - it appears to be
1349 someone's old backup of "outform.h". version "0.98.06e"
1353 \b fbk - finally added the fix for the "multiple %includes bug",
1354 known since 7/27/99 - reported originally (?) and sent to
1355 us by Austin Lunnen - he reports that John Fine had a fix
1356 within the day. Here it is...
1358 \b Nelson Rush resigns from the group. Big thanks to Nelson for
1359 his leadership and enthusiasm in getting these changes
1360 incorporated into Nasm!
1362 \b fbk - [list +], [list -] directives - ineptly implemented, should
1363 be re-written or removed, perhaps.
1365 \b Brian Raiter / fbk - "elfso bug" fix - applied to aoutb format
1366 as well - testing might be desirable...
1370 \b James Seter - -postfix, -prefix command line switches.
1372 \b Yuri Zaporozhets - rdoff utility changes.
1375 \S{cl-0.98p1} Version 0.98p1
1377 \b GAS-like palign (Panos Minos)
1379 \b FIXME: Someone, fill this in with details
1382 \S{cl-0.98bf (bug-fixed)} Version 0.98bf (bug-fixed)
1384 \b Fixed - elf and aoutb bug - shared libraries
1385 - multiple "%include" bug in "-f obj"
1387 - unrecognized option bug in ndisasm
1389 \S{cl-0.98.03 with John Coffman's changes released 27-Jul-2000} Version 0.98.03 with John Coffman's changes released 27-Jul-2000
1391 \b Added signed byte optimizations for the 0x81/0x83 class
1392 of instructions: ADC, ADD, AND, CMP, OR, SBB, SUB, XOR:
1393 when used as 'ADD reg16,imm' or 'ADD reg32,imm.' Also
1394 optimization of signed byte form of 'PUSH imm' and 'IMUL
1395 reg,imm'/'IMUL reg,reg,imm.' No size specification is needed.
1397 \b Added multi-pass JMP and Jcc offset optimization. Offsets
1398 on forward references will preferentially use the short form,
1399 without the need to code a specific size (short or near) for
1400 the branch. Added instructions for 'Jcc label' to use the
1401 form 'Jnotcc $+3/JMP label', in cases where a short offset
1402 is out of bounds. If compiling for a 386 or higher CPU, then
1403 the 386 form of Jcc will be used instead.
1405 This feature is controlled by a new command-line switch: "O",
1406 (upper case letter O). "-O0" reverts the assembler to no
1407 extra optimization passes, "-O1" allows up to 5 extra passes,
1408 and "-O2"(default), allows up to 10 extra optimization passes.
1410 \b Added a new directive: 'cpu XXX', where XXX is any of:
1411 8086, 186, 286, 386, 486, 586, pentium, 686, PPro, P2, P3 or
1412 Katmai. All are case insensitive. All instructions will
1413 be selected only if they apply to the selected cpu or lower.
1414 Corrected a couple of bugs in cpu-dependence in 'insns.dat'.
1416 \b Added to 'standard.mac', the "use16" and "use32" forms of
1417 the "bits 16/32" directive. This is nothing new, just conforms
1418 to a lot of other assemblers. (minor)
1420 \b Changed label allocation from 320/32 (10000 labels @ 200K+)
1421 to 32/37 (1000 labels); makes running under DOS much easier.
1422 Since additional label space is allocated dynamically, this
1423 should have no effect on large programs with lots of labels.
1424 The 37 is a prime, believed to be better for hashing. (minor)
1427 \S{cl-0.98.03} Version 0.98.03
1429 "Integrated patchfile 0.98-0.98.01. I call this version 0.98.03 for
1430 historical reasons: 0.98.02 was trashed." --John Coffman
1431 <johninsd@san.rr.com>, 27-Jul-2000
1433 \b Kendall Bennett's SciTech MGL changes
1435 \b Note that you must define "TASM_COMPAT" at compile-time
1436 to get the Tasm Ideal Mode compatibility.
1438 \b All changes can be compiled in and out using the TASM_COMPAT macros,
1439 and when compiled without TASM_COMPAT defined we get the exact same
1440 binary as the unmodified 0.98 sources.
1442 \b standard.mac, macros.c: Added macros to ignore TASM directives before
1445 \b nasm.h: Added extern declaration for tasm_compatible_mode
1447 \b nasm.c: Added global variable tasm_compatible_mode
1449 \b Added command line switch for TASM compatible mode (-t)
1451 \b Changed version command line to reflect when compiled with TASM additions
1453 \b Added response file processing to allow all arguments on a single
1454 line (response file is @resp rather than -@resp for NASM format).
1456 \b labels.c: Changes islocal() macro to support TASM style @@local labels.
1458 \b Added islocalchar() macro to support TASM style @@local labels.
1460 \b parser.c: Added support for TASM style memory references (ie: mov
1461 [DWORD eax],10 rather than the NASM style mov DWORD [eax],10).
1463 \b preproc.c: Added new directives, \c{%arg}, \c{%local}, \c{%stacksize} to directives
1466 \b Added support for TASM style directives without a leading % symbol.
1468 \b Integrated a block of changes from Andrew Zabolotny <bit@eltech.ru>:
1470 \b A new keyword \c{%xdefine} and its case-insensitive counterpart \c{%ixdefine}.
1471 They work almost the same way as \c{%define} and \c{%idefine} but expand
1472 the definition immediately, not on the invocation. Something like a cross
1473 between \c{%define} and \c{%assign}. The "x" suffix stands for "eXpand", so
1474 "xdefine" can be deciphered as "expand-and-define". Thus you can do
1480 \c %xdefine %1 dword [esp+ofs]
1481 \c %assign ofs ofs+4
1484 \b Changed the place where the expansion of %$name macros are expanded.
1485 Now they are converted into ..@ctxnum.name form when detokenizing, so
1486 there are no quirks as before when using %$name arguments to macros,
1487 in macros etc. For example:
1496 Now last line will be expanded into "hello" as expected. This also allows
1497 for lots of goodies, a good example are extended "proc" macros included
1500 \b Added a check for "cstk" in smacro_defined() before calling get_ctx() -
1501 this allows for things like:
1506 to work without warnings even in no context.
1508 \b Added a check for "cstk" in %if*ctx and %elif*ctx directives -
1509 this allows to use \c{%ifctx} without excessive warnings. If there is
1510 no active context, \c{%ifctx} goes through "false" branch.
1512 \b Removed "user error: " prefix with \c{%error} directive: it just clobbers the
1513 output and has absolutely no functionality. Besides, this allows to write
1514 macros that does not differ from built-in functions in any way.
1516 \b Added expansion of string that is output by \c{%error} directive. Now you
1519 \c %define hello(x) Hello, x!
1521 \c %define %$name andy
1522 \c %error "hello(%$name)"
1524 Same happened with \c{%include} directive.
1526 \b Now all directives that expect an identifier will try to expand and
1527 concatenate everything without whitespaces in between before usage.
1528 For example, with "unfixed" nasm the commands
1530 \c %define %$abc hello
1531 \c %define __%$abc goodbye
1534 would produce "incorrect" output: last line will expand to
1536 \c hello goodbyehello
1538 Not quite what you expected, eh? :-) The answer is that preprocessor
1539 treats the \c{%define} construct as if it would be
1541 \c %define __ %$abc goodbye
1543 (note the white space between __ and %$abc). After my "fix" it
1544 will "correctly" expand into
1548 as expected. Note that I use quotes around words "correct", "incorrect"
1549 etc because this is rather a feature not a bug; however current behaviour
1550 is more logical (and allows more advanced macro usage :-).
1552 Same change was applied to:
1553 \c{%push},\c{%macro},\c{%imacro},\c{%define},\c{%idefine},\c{%xdefine},\c{%ixdefine},
1554 \c{%assign},\c{%iassign},\c{%undef}
1556 \b A new directive [WARNING {+|-}warning-id] have been added. It works only
1557 if the assembly phase is enabled (i.e. it doesn't work with nasm -e).
1559 \b A new warning type: macro-selfref. By default this warning is disabled;
1560 when enabled NASM warns when a macro self-references itself; for example
1561 the following source:
1563 \c [WARNING macro-selfref]
1574 will produce a warning, but if we remove the first line we won't see it
1575 anymore (which is The Right Thing To Do {tm} IMHO since C preprocessor
1576 eats such constructs without warnings at all).
1578 \b Added a "error" routine to preprocessor which always will set ERR_PASS1
1579 bit in severity_code. This removes annoying repeated errors on first
1580 and second passes from preprocessor.
1582 \b Added the %+ operator in single-line macros for concatenating two
1583 identifiers. Usage example:
1585 \c %define _myfunc _otherfunc
1586 \c %define cextern(x) _ %+ x
1589 After first expansion, third line will become "_myfunc". After this
1590 expansion is performed again so it becomes "_otherunc".
1592 \b Now if preprocessor is in a non-emitting state, no warning or error
1593 will be emitted. Example:
1598 \c put anything you want between these two brackets,
1599 \c even macro-parameter references %1 or local
1600 \c labels %$zz or macro-local labels %%zz - no
1601 \c warning will be emitted.
1604 \b Context-local variables on expansion as a last resort are looked up
1605 in outer contexts. For example, the following piece:
1608 \c %define %$a [esp]
1615 will expand correctly the fourth line to [esp]; if we'll define another
1616 %$a inside the "inner" context, it will take precedence over outer
1617 definition. However, this modification has been applied only to
1618 expand_smacro and not to smacro_define: as a consequence expansion
1619 looks in outer contexts, but \c{%ifdef} won't look in outer contexts.
1621 This behaviour is needed because we don't want nested contexts to
1622 act on already defined local macros. Example:
1624 \c %define %$arg1 [esp+4]
1630 In this example the "if" mmacro enters into the "if" context, so %$arg1
1631 is not valid anymore inside "if". Of course it could be worked around
1632 by using explicitely %$$arg1 but this is ugly IMHO.
1634 \b Fixed memory leak in \c{%undef}. The origline wasn't freed before
1637 \b Fixed trap in preprocessor when line expanded to empty set of tokens.
1638 This happens, for example, in the following case:
1640 \c #define SOMETHING
1644 \S{cl-0.98} Version 0.98
1646 All changes since NASM 0.98p3 have been produced by H. Peter Anvin <hpa@zytor.com>.
1648 \b The documentation comment delimiter is \# not #.
1650 \b Allow EQU definitions to refer to external labels; reported by
1653 \b Re-enable support for RDOFF v1; reported by Pedro Gimeno.
1655 \b Updated License file per OK from Simon and Julian.
1658 \S{cl-0.98p9} Version 0.98p9
1660 \b Update documentation (although the instruction set reference will
1661 have to wait; I don't want to hold up the 0.98 release for it.)
1663 \b Verified that the NASM implementation of the PEXTRW and PMOVMSKB
1664 instructions is correct. The encoding differs from what the Intel
1665 manuals document, but the Pentium III behaviour matches NASM, not
1668 \b Fix handling of implicit sizes in PSHUFW and PINSRW, reported by
1671 \b Resurrect the -s option, which was removed when changing the
1672 diagnostic output to stdout.
1675 \S{cl-0.98p8} Version 0.98p8
1677 \b Fix for "DB" when NASM is running on a bigendian machine.
1679 \b Invoke insns.pl once for each output script, making Makefile.in
1680 legal for "make -j".
1682 \b Improve the Unix configure-based makefiles to make package
1685 \b Included an RPM .spec file for building RPM (RedHat Package Manager)
1686 packages on Linux or Unix systems.
1688 \b Fix Makefile dependency problems.
1690 \b Change src/rdsrc.pl to include sectioning information in info
1691 output; required for install-info to work.
1693 \b Updated the RDOFF distribution to version 2 from Jules; minor
1694 massaging to make it compile in my environment.
1696 \b Split doc files that can be built by anyone with a Perl interpreter off
1697 into a separate archive.
1699 \b "Dress rehearsal" release!
1702 \S{cl-0.98p7} Version 0.98p7
1704 \b Fixed opcodes with a third byte-sized immediate argument to not
1705 complain if given "byte" on the immediate.
1707 \b Allow \c{%undef} to remove single-line macros with arguments. This
1708 matches the behaviour of #undef in the C preprocessor.
1710 \b Allow -d, -u, -i and -p to be specified as -D, -U, -I and -P for
1711 compatibility with most C compilers and preprocessors. This allows
1712 Makefile options to be shared between cc and nasm, for example.
1716 \b Went through the list of Katmai instructions and hopefully fixed the
1717 (rather few) mistakes in it.
1719 \b (Hopefully) fixed a number of disassembler bugs related to ambiguous
1720 instructions (disambiguated by -p) and SSE instructions with REP.
1722 \b Fix for bug reported by Mark Junger: "call dword 0x12345678" should
1723 work and may add an OSP (affected CALL, JMP, Jcc).
1725 \b Fix for environments when "stderr" isn't a compile-time constant.
1728 \S{cl-0.98p6} Version 0.98p6
1731 \b Took officially over coordination of the 0.98 release; so drop
1732 the p3.x notation. Skipped p4 and p5 to avoid confusion with John
1733 Fine's J4 and J5 releases.
1735 \b Update the documentation; however, it still doesn't include
1736 documentation for the various new instructions. I somehow wonder if
1737 it makes sense to have an instruction set reference in the assembler
1738 manual when Intel et al have PDF versions of their manuals online.
1740 \b Recognize "idt" or "centaur" for the -p option to ndisasm.
1742 \b Changed error messages back to stderr where they belong, but add an
1743 -E option to redirect them elsewhere (the DOS shell cannot redirect
1746 \b -M option to generate Makefile dependencies (based on code from Alex
1749 \b \c{%undef} preprocessor directive, and -u option, that undefines a
1752 \b OS/2 Makefile (Mkfiles/Makefile.os2) for Borland under OS/2; from
1755 \b Various minor bugfixes (reported by):
1756 - Dangling \c{%s} in preproc.c (Martin Junker)
1758 \b THERE ARE KNOWN BUGS IN SSE AND THE OTHER KATMAI INSTRUCTIONS. I am
1759 on a trip and didn't bring the Katmai instruction reference, so I
1760 can't work on them right now.
1762 \b Updated the License file per agreement with Simon and Jules to
1763 include a GPL distribution clause.
1766 \S{cl-0.98p3.7} Version 0.98p3.7
1768 \b (Hopefully) fixed the canned Makefiles to include the outrdf2 and
1771 \b Renamed changes.asm to changed.asm.
1774 \S{cl-0.98p3.6} Version 0.98p3.6
1776 \b Fixed a bunch of instructions that were added in 0.98p3.5 which had
1777 memory operands, and the address-size prefix was missing from the
1778 instruction pattern.
1781 \S{cl-0.98p3.5} Version 0.98p3.5
1783 \b Merged in changes from John S. Fine's 0.98-J5 release. John's based
1784 0.98-J5 on my 0.98p3.3 release; this merges the changes.
1786 \b Expanded the instructions flag field to a long so we can fit more
1787 flags; mark SSE (KNI) and AMD or Katmai-specific instructions as
1790 \b Fix the "PRIV" flag on a bunch of instructions, and create new
1791 "PROT" flag for protected-mode-only instructions (orthogonal to if
1792 the instruction is privileged!) and new "SMM" flag for SMM-only
1795 \b Added AMD-only SYSCALL and SYSRET instructions.
1797 \b Make SSE actually work, and add new Katmai MMX instructions.
1799 \b Added a -p (preferred vendor) option to ndisasm so that it can
1800 distinguish e.g. Cyrix opcodes also used in SSE. For example:
1802 \c ndisasm -p cyrix aliased.bin
1803 \c 00000000 670F514310 paddsiw mm0,[ebx+0x10]
1804 \c 00000005 670F514320 paddsiw mm0,[ebx+0x20]
1805 \c ndisasm -p intel aliased.bin
1806 \c 00000000 670F514310 sqrtps xmm0,[ebx+0x10]
1807 \c 00000005 670F514320 sqrtps xmm0,[ebx+0x20]
1809 \b Added a bunch of Cyrix-specific instructions.
1812 \S{cl-0.98p3.4} Version 0.98p3.4
1814 \b Made at least an attempt to modify all the additional Makefiles (in
1815 the Mkfiles directory). I can't test it, but this was the best I
1818 \b DOS DJGPP+"Opus Make" Makefile from John S. Fine.
1820 \b changes.asm changes from John S. Fine.
1823 \S{cl-0.98p3.3} Version 0.98p3.3
1825 \b Patch from Conan Brink to allow nesting of \c{%rep} directives.
1827 \b If we're going to allow INT01 as an alias for INT1/ICEBP (one of
1828 Jules 0.98p3 changes), then we should allow INT03 as an alias for INT3
1831 \b Updated changes.asm to include the latest changes.
1833 \b Tried to clean up the <CR>s that had snuck in from a DOS/Windows
1834 environment into my Unix environment, and try to make sure than
1835 DOS/Windows users get them back.
1837 \b We would silently generate broken tools if insns.dat wasn't sorted
1838 properly. Change insns.pl so that the order doesn't matter.
1840 \b Fix bug in insns.pl (introduced by me) which would cause conditional
1841 instructions to have an extra "cc" in disassembly, e.g. "jnz"
1842 disassembled as "jccnz".
1845 \S{cl-0.98p3.2} Version 0.98p3.2
1847 \b Merged in John S. Fine's changes from his 0.98-J4 prerelease; see
1848 http://www.csoft.net/cz/johnfine/
1850 \b Changed previous "spotless" Makefile target (appropriate for distribution)
1851 to "distclean", and added "cleaner" target which is same as "clean"
1852 except deletes files generated by Perl scripts; "spotless" is union.
1854 \b Removed BASIC programs from distribution. Get a Perl interpreter
1855 instead (see below.)
1857 \b Calling this "pre-release 3.2" rather than "p3-hpa2" because of
1858 John's contributions.
1860 \b Actually link in the IEEE output format (zoutieee.c); fix a bunch of
1861 compiler warnings in that file. Note I don't know what IEEE output
1862 is supposed to look like, so these changes were made "blind".
1865 \S{cl-0.98p3-hpa} Version 0.98p3-hpa
1867 \b Merged nasm098p3.zip with nasm-0.97.tar.gz to create a fully
1868 buildable version for Unix systems (Makefile.in updates, etc.)
1870 \b Changed insns.pl to create the instruction tables in nasm.h and
1871 names.c, so that a new instruction can be added by adding it *only*
1874 \b Added the following new instructions: SYSENTER, SYSEXIT, FXSAVE,
1875 FXRSTOR, UD1, UD2 (the latter two are two opcodes that Intel
1876 guarantee will never be used; one of them is documented as UD2 in
1877 Intel documentation, the other one just as "Undefined Opcode" --
1878 calling it UD1 seemed to make sense.)
1880 \b MAX_SYMBOL was defined to be 9, but LOADALL286 and LOADALL386 are 10
1881 characters long. Now MAX_SYMBOL is derived from insns.dat.
1883 \b A note on the BASIC programs included: forget them. insns.bas is
1884 already out of date. Get yourself a Perl interpreter for your
1885 platform of choice at
1886 \W{http://www.cpan.org/ports/index.html}{http://www.cpan.org/ports/index.html}.
1889 \S{cl-0.98p3} Version 0.98 pre-release 3
1891 \b added response file support, improved command line handling, new layout
1894 \b fixed limit checking bug, 'OUT byte nn, reg' bug, and a couple of rdoff
1895 related bugs, updated Wishlist; 0.98 Prerelease 3.
1898 \S{cl-0.98p2} Version 0.98 pre-release 2
1900 \b fixed bug in outcoff.c to do with truncating section names longer
1901 than 8 characters, referencing beyond end of string; 0.98 pre-release 2
1904 \S{cl-0.98p1} Version 0.98 pre-release 1
1906 \b Fixed a bug whereby STRUC didn't work at all in RDF.
1908 \b Fixed a problem with group specification in PUBDEFs in OBJ.
1910 \b Improved ease of adding new output formats. Contribution due to
1913 \b Fixed a bug in relocations in the `bin' format: was showing up when
1914 a relocatable reference crossed an 8192-byte boundary in any output
1917 \b Fixed a bug in local labels: local-label lookups were inconsistent
1918 between passes one and two if an EQU occurred between the definition
1919 of a global label and the subsequent use of a local label local to
1922 \b Fixed a seg-fault in the preprocessor (again) which happened when
1923 you use a blank line as the first line of a multi-line macro
1924 definition and then defined a label on the same line as a call to
1927 \b Fixed a stale-pointer bug in the handling of the NASM environment
1928 variable. Thanks to Thomas McWilliams.
1930 \b ELF had a hard limit on the number of sections which caused
1931 segfaults when transgressed. Fixed.
1933 \b Added ability for ndisasm to read from stdin by using `-' as the
1936 \b ndisasm wasn't outputting the TO keyword. Fixed.
1938 \b Fixed error cascade on bogus expression in \c{%if} - an error in
1939 evaluation was causing the entire \c{%if} to be discarded, thus creating
1940 trouble later when the \c{%else} or \c{%endif} was encountered.
1942 \b Forward reference tracking was instruction-granular not operand-
1943 granular, which was causing 286-specific code to be generated
1944 needlessly on code of the form `shr word [forwardref],1'. Thanks to
1945 Jim Hague for sending a patch.
1947 \b All messages now appear on stdout, as sending them to stderr serves
1948 no useful purpose other than to make redirection difficult.
1950 \b Fixed the problem with EQUs pointing to an external symbol - this
1951 now generates an error message.
1953 \b Allowed multiple size prefixes to an operand, of which only the first
1954 is taken into account.
1956 \b Incorporated John Fine's changes, including fixes of a large number
1957 of preprocessor bugs, some small problems in OBJ, and a reworking of
1958 label handling to define labels before their line is assembled, rather
1961 \b Reformatted a lot of the source code to be more readable. Included
1962 'coding.txt' as a guideline for how to format code for contributors.
1964 \b Stopped nested \c{%reps} causing a panic - they now cause a slightly more
1965 friendly error message instead.
1967 \b Fixed floating point constant problems (patch by Pedro Gimeno)
1969 \b Fixed the return value of insn_size() not being checked for -1, indicating
1972 \b Incorporated 3Dnow! instructions.
1974 \b Fixed the 'mov eax, eax + ebx' bug.
1976 \b Fixed the GLOBAL EQU bug in ELF. Released developers release 3.
1978 \b Incorporated John Fine's command line parsing changes
1980 \b Incorporated David Lindauer's OMF debug support
1982 \b Made changes for LCC 4.0 support (\c{__NASM_CDecl__}, removed register size
1983 specification warning when sizes agree).
1986 \H{cl-0.9x} NASM 0.9 Series
1988 Revisions before 0.98.
1991 \S{cl-0.97} Version 0.97 released December 1997
1993 \b This was entirely a bug-fix release to 0.96, which seems to have got
1996 \b Fixed stupid mistake in OBJ which caused `MOV EAX,<constant>' to
1997 fail. Caused by an error in the `MOV EAX,<segment>' support.
1999 \b ndisasm hung at EOF when compiled with lcc on Linux because lcc on
2000 Linux somehow breaks feof(). ndisasm now does not rely on feof().
2002 \b A heading in the documentation was missing due to a markup error in
2003 the indexing. Fixed.
2005 \b Fixed failure to update all pointers on realloc() within extended-
2006 operand code in parser.c. Was causing wrong behaviour and seg faults
2007 on lines such as `dd 0.0,0.0,0.0,0.0,...'
2009 \b Fixed a subtle preprocessor bug whereby invoking one multi-line
2010 macro on the first line of the expansion of another, when the second
2011 had been invoked with a label defined before it, didn't expand the
2014 \b Added internal.doc back in to the distribution archives - it was
2015 missing in 0.96 *blush*
2017 \b Fixed bug causing 0.96 to be unable to assemble its own test files,
2018 specifically objtest.asm. *blush again*
2020 \b Fixed seg-faults and bogus error messages caused by mismatching
2021 \c{%rep} and \c{%endrep} within multi-line macro definitions.
2023 \b Fixed a problem with buffer overrun in OBJ, which was causing
2024 corruption at ends of long PUBDEF records.
2026 \b Separated DOS archives into main-program and documentation to reduce
2030 \S{cl-0.96} Version 0.96 released November 1997
2032 \b Fixed a bug whereby, if `nasm sourcefile' would cause a filename
2033 collision warning and put output into `nasm.out', then `nasm
2034 sourcefile -o outputfile' still gave the warning even though the
2036 Fixed name pollution under Digital UNIX: one of its header files
2037 defined R_SP, which broke the enum in nasm.h.
2039 \b Fixed minor instruction table problems: FUCOM and FUCOMP didn't have
2040 two-operand forms; NDISASM didn't recognise the longer register
2041 forms of PUSH and POP (eg FF F3 for PUSH BX); TEST mem,imm32 was
2042 flagged as undocumented; the 32-bit forms of CMOV had 16-bit operand
2043 size prefixes; `AAD imm' and `AAM imm' are no longer flagged as
2044 undocumented because the Intel Architecture reference documents
2047 \b Fixed a problem with the local-label mechanism, whereby strange
2048 types of symbol (EQUs, auto-defined OBJ segment base symbols)
2049 interfered with the `previous global label' value and screwed up
2052 \b Fixed a bug whereby the stub preprocessor didn't communicate with
2053 the listing file generator, so that the -a and -l options in
2054 conjunction would produce a useless listing file.
2056 \b Merged `os2' object file format back into `obj', after discovering
2057 that `obj' _also_ shouldn't have a link pass separator in a module
2058 containing a non-trivial MODEND. Flat segments are now declared
2059 using the FLAT attribute. `os2' is no longer a valid object format
2062 \b Removed the fixed-size temporary storage in the evaluator. Very very
2063 long expressions (like `mov ax,1+1+1+1+...' for two hundred 1s or
2064 so) should now no longer crash NASM.
2066 \b Fixed a bug involving segfaults on disassembly of MMX instructions,
2067 by changing the meaning of one of the operand-type flags in nasm.h.
2068 This may cause other apparently unrelated MMX problems; it needs to
2069 be tested thoroughly.
2071 \b Fixed some buffer overrun problems with large OBJ output files.
2072 Thanks to DJ Delorie for the bug report and fix.
2074 \b Made preprocess-only mode actually listen to the \c{%line} markers as it
2075 prints them, so that it can report errors more sanely.
2077 \b Re-designed the evaluator to keep more sensible track of expressions
2078 involving forward references: can now cope with previously-nightmare
2085 \b Added the ALIGN and ALIGNB standard macros.
2087 \b Added PIC support in ELF: use of WRT to obtain the four extra
2088 relocation types needed.
2090 \b Added the ability for output file formats to define their own
2091 extensions to the GLOBAL, COMMON and EXTERN directives.
2093 \b Implemented common-variable alignment, and global-symbol type and
2094 size declarations, in ELF.
2096 \b Implemented NEAR and FAR keywords for common variables, plus
2097 far-common element size specification, in OBJ.
2099 \b Added a feature whereby EXTERNs and COMMONs in OBJ can be given a
2100 default WRT specification (either a segment or a group).
2102 \b Transformed the Unix NASM archive into an auto-configuring package.
2104 \b Added a sanity-check for people applying SEG to things which are
2105 already segment bases: this previously went unnoticed by the SEG
2106 processing and caused OBJ-driver panics later.
2108 \b Added the ability, in OBJ format, to deal with `MOV EAX,<segment>'
2109 type references: OBJ doesn't directly support dword-size segment
2110 base fixups, but as long as the low two bytes of the constant term
2111 are zero, a word-size fixup can be generated instead and it will
2114 \b Added the ability to specify sections' alignment requirements in
2115 Win32 object files and pure binary files.
2117 \b Added preprocess-time expression evaluation: the \c{%assign} (and
2118 \c{%iassign}) directive and the bare \c{%if} (and \c{%elif}) conditional. Added
2119 relational operators to the evaluator, for use only in \c{%if}
2120 constructs: the standard relationals = < > <= >= <> (and C-like
2121 synonyms == and !=) plus low-precedence logical operators &&, ^^ and
2124 \b Added a preprocessor repeat construct: \c{%rep} / \c{%exitrep} / \c{%endrep}.
2126 \b Added the __FILE__ and __LINE__ standard macros.
2128 \b Added a sanity check for number constants being greater than
2129 0xFFFFFFFF. The warning can be disabled.
2131 \b Added the %0 token whereby a variadic multi-line macro can tell how
2132 many parameters it's been given in a specific invocation.
2134 \b Added \c{%rotate}, allowing multi-line macro parameters to be cycled.
2136 \b Added the `*' option for the maximum parameter count on multi-line
2137 macros, allowing them to take arbitrarily many parameters.
2139 \b Added the ability for the user-level forms of EXTERN, GLOBAL and
2140 COMMON to take more than one argument.
2142 \b Added the IMPORT and EXPORT directives in OBJ format, to deal with
2145 \b Added some more preprocessor \c{%if} constructs: \c{%ifidn} / \c{%ifidni} (exact
2146 textual identity), and \c{%ifid} / \c{%ifnum} / \c{%ifstr} (token type testing).
2148 \b Added the ability to distinguish SHL AX,1 (the 8086 version) from
2149 SHL AX,BYTE 1 (the 286-and-upwards version whose constant happens to
2152 \b Added NetBSD/FreeBSD/OpenBSD's variant of a.out format, complete
2153 with PIC shared library features.
2155 \b Changed NASM's idiosyncratic handling of FCLEX, FDISI, FENI, FINIT,
2156 FSAVE, FSTCW, FSTENV, and FSTSW to bring it into line with the
2157 otherwise accepted standard. The previous behaviour, though it was a
2158 deliberate feature, was a deliberate feature based on a
2159 misunderstanding. Apologies for the inconvenience.
2161 \b Improved the flexibility of ABSOLUTE: you can now give it an
2162 expression rather than being restricted to a constant, and it can
2163 take relocatable arguments as well.
2165 \b Added the ability for a variable to be declared as EXTERN multiple
2166 times, and the subsequent definitions are just ignored.
2168 \b We now allow instruction prefixes (CS, DS, LOCK, REPZ etc) to be
2169 alone on a line (without a following instruction).
2171 \b Improved sanity checks on whether the arguments to EXTERN, GLOBAL
2172 and COMMON are valid identifiers.
2174 \b Added misc/exebin.mac to allow direct generation of .EXE files by
2175 hacking up an EXE header using DB and DW; also added test/binexe.asm
2176 to demonstrate the use of this. Thanks to Yann Guidon for
2177 contributing the EXE header code.
2179 \b ndisasm forgot to check whether the input file had been successfully
2180 opened. Now it does. Doh!
2182 \b Added the Cyrix extensions to the MMX instruction set.
2184 \b Added a hinting mechanism to allow [EAX+EBX] and [EBX+EAX] to be
2185 assembled differently. This is important since [ESI+EBP] and
2186 [EBP+ESI] have different default base segment registers.
2188 \b Added support for the PharLap OMF extension for 4096-byte segment
2192 \S{cl-0.95 released July 1997} Version 0.95 released July 1997
2194 \b Fixed yet another ELF bug. This one manifested if the user relied on
2195 the default segment, and attempted to define global symbols without
2196 first explicitly declaring the target segment.
2198 \b Added makefiles (for NASM and the RDF tools) to build Win32 console
2199 apps under Symantec C++. Donated by Mark Junker.
2201 \b Added `macros.bas' and `insns.bas', QBasic versions of the Perl
2202 scripts that convert `standard.mac' to `macros.c' and convert
2203 `insns.dat' to `insnsa.c' and `insnsd.c'. Also thanks to Mark
2206 \b Changed the diassembled forms of the conditional instructions so
2207 that JB is now emitted as JC, and other similar changes. Suggested
2208 list by Ulrich Doewich.
2210 \b Added `@' to the list of valid characters to begin an identifier
2213 \b Documentary changes, notably the addition of the `Common Problems'
2214 section in nasm.doc.
2216 \b Fixed a bug relating to 32-bit PC-relative fixups in OBJ.
2218 \b Fixed a bug in perm_copy() in labels.c which was causing exceptions
2219 in cleanup_labels() on some systems.
2221 \b Positivity sanity check in TIMES argument changed from a warning to
2222 an error following a further complaint.
2224 \b Changed the acceptable limits on byte and word operands to allow
2225 things like `~10111001b' to work.
2227 \b Fixed a major problem in the preprocessor which caused seg-faults if
2228 macro definitions contained blank lines or comment-only lines.
2230 \b Fixed inadequate error checking on the commas separating the
2231 arguments to `db', `dw' etc.
2233 \b Fixed a crippling bug in the handling of macros with operand counts
2234 defined with a `+' modifier.
2236 \b Fixed a bug whereby object file formats which stored the input file
2237 name in the output file (such as OBJ and COFF) weren't doing so
2238 correctly when the output file name was specified on the command
2241 \b Removed [INC] and [INCLUDE] support for good, since they were
2244 \b Fixed a bug in OBJ which caused all fixups to be output in 16-bit
2245 (old-format) FIXUPP records, rather than putting the 32-bit ones in
2246 FIXUPP32 (new-format) records.
2248 \b Added, tentatively, OS/2 object file support (as a minor variant on
2251 \b Updates to Fox Cutter's Borland C makefile, Makefile.bc2.
2253 \b Removed a spurious second fclose() on the output file.
2255 \b Added the `-s' command line option to redirect all messages which
2256 would go to stderr (errors, help text) to stdout instead.
2258 \b Added the `-w' command line option to selectively suppress some
2259 classes of assembly warning messages.
2261 \b Added the `-p' pre-include and `-d' pre-define command-line options.
2263 \b Added an include file search path: the `-i' command line option.
2265 \b Fixed a silly little preprocessor bug whereby starting a line with a
2266 `%!' environment-variable reference caused an `unknown directive'
2269 \b Added the long-awaited listing file support: the `-l' command line
2272 \b Fixed a problem with OBJ format whereby, in the absence of any
2273 explicit segment definition, non-global symbols declared in the
2274 implicit default segment generated spurious EXTDEF records in the
2277 \b Added the NASM environment variable.
2279 \b From this version forward, Win32 console-mode binaries will be
2280 included in the DOS distribution in addition to the 16-bit binaries.
2281 Added Makefile.vc for this purpose.
2283 \b Added `return 0;' to test/objlink.c to prevent compiler warnings.
2285 \b Added the __NASM_MAJOR__ and __NASM_MINOR__ standard defines.
2287 \b Added an alternative memory-reference syntax in which prefixing an
2288 operand with `&' is equivalent to enclosing it in square brackets,
2289 at the request of Fox Cutter.
2291 \b Errors in pass two now cause the program to return a non-zero error
2292 code, which they didn't before.
2294 \b Fixed the single-line macro cycle detection, which didn't work at
2295 all on macros with no parameters (caused an infinite loop). Also
2296 changed the behaviour of single-line macro cycle detection to work
2297 like cpp, so that macros like `extrn' as given in the documentation
2300 \b Fixed the implementation of WRT, which was too restrictive in that
2301 you couldn't do `mov ax,[di+abc wrt dgroup]' because (di+abc) wasn't
2302 a relocatable reference.
2305 \S{cl-0.94 released April 1997} Version 0.94 released April 1997
2308 \b Major item: added the macro processor.
2310 \b Added undocumented instructions SMI, IBTS, XBTS and LOADALL286. Also
2311 reorganised CMPXCHG instruction into early-486 and Pentium forms.
2312 Thanks to Thobias Jones for the information.
2314 \b Fixed two more stupid bugs in ELF, which were causing `ld' to
2315 continue to seg-fault in a lot of non-trivial cases.
2317 \b Fixed a seg-fault in the label manager.
2319 \b Stopped FBLD and FBSTP from _requiring_ the TWORD keyword, which is
2320 the only option for BCD loads/stores in any case.
2322 \b Ensured FLDCW, FSTCW and FSTSW can cope with the WORD keyword, if
2323 anyone bothers to provide it. Previously they complained unless no
2324 keyword at all was present.
2326 \b Some forms of FDIV/FDIVR and FSUB/FSUBR were still inverted: a
2327 vestige of a bug that I thought had been fixed in 0.92. This was
2328 fixed, hopefully for good this time...
2330 \b Another minor phase error (insofar as a phase error can _ever_ be
2331 minor) fixed, this one occurring in code of the form
2333 \c rol ax,forward_reference
2334 \c forward_reference equ 1
2336 \b The number supplied to TIMES is now sanity-checked for positivity,
2337 and also may be greater than 64K (which previously didn't work on
2340 \b Added Watcom C makefiles, and misc/pmw.bat, donated by Dominik Behr.
2342 \b Added the INCBIN pseudo-opcode.
2344 \b Due to the advent of the preprocessor, the [INCLUDE] and [INC]
2345 directives have become obsolete. They are still supported in this
2346 version, with a warning, but won't be in the next.
2348 \b Fixed a bug in OBJ format, which caused incorrect object records to
2349 be output when absolute labels were made global.
2351 \b Updates to RDOFF subdirectory, and changes to outrdf.c.
2354 \S{cl-0.93 released January 1997} Version 0.93 released January 1997
2356 This release went out in a great hurry after semi-crippling bugs
2359 \b Really \e{did} fix the stack overflows this time. *blush*
2361 \b Had problems with EA instruction sizes changing between passes, when
2362 an offset contained a forward reference and so 4 bytes were
2363 allocated for the offset in pass one; by pass two the symbol had
2364 been defined and happened to be a small absolute value, so only 1
2365 byte got allocated, causing instruction size mismatch between passes
2366 and hence incorrect address calculations. Fixed.
2368 \b Stupid bug in the revised ELF section generation fixed (associated
2369 string-table section for .symtab was hard-coded as 7, even when this
2370 didn't fit with the real section table). Was causing `ld' to
2371 seg-fault under Linux.
2373 \b Included a new Borland C makefile, Makefile.bc2, donated by Fox
2374 Cutter <lmb@comtch.iea.com>.
2377 \S{cl-0.92 released January 1997} Version 0.92 released January 1997
2379 \b The FDIVP/FDIVRP and FSUBP/FSUBRP pairs had been inverted: this was
2380 fixed. This also affected the LCC driver.
2382 \b Fixed a bug regarding 32-bit effective addresses of the form
2383 \c{[other_register+ESP]}.
2385 \b Documentary changes, notably documentation of the fact that Borland
2386 Win32 compilers use `obj' rather than `win32' object format.
2388 \b Fixed the COMENT record in OBJ files, which was formatted
2391 \b Fixed a bug causing segfaults in large RDF files.
2393 \b OBJ format now strips initial periods from segment and group
2394 definitions, in order to avoid complications with the local label
2397 \b Fixed a bug in disassembling far calls and jumps in NDISASM.
2399 \b Added support for user-defined sections in COFF and ELF files.
2401 \b Compiled the DOS binaries with a sensible amount of stack, to
2402 prevent stack overflows on any arithmetic expression containing
2405 \b Fixed a bug in handling of files that do not terminate in a newline.
2408 \S{cl-0.91 released November 1996} Version 0.91 released November 1996
2410 \b Loads of bug fixes.
2412 \b Support for RDF added.
2414 \b Support for DBG debugging format added.
2416 \b Support for 32-bit extensions to Microsoft OBJ format added.
2418 \b Revised for Borland C: some variable names changed, makefile added.
2420 \b LCC support revised to actually work.
2422 \b JMP/CALL NEAR/FAR notation added.
2424 \b `a16', `o16', `a32' and `o32' prefixes added.
2426 \b Range checking on short jumps implemented.
2428 \b MMX instruction support added.
2430 \b Negative floating point constant support added.
2432 \b Memory handling improved to bypass 64K barrier under DOS.
2434 \b \c{$} prefix to force treatment of reserved words as identifiers added.
2436 \b Default-size mechanism for object formats added.
2438 \b Compile-time configurability added.
2440 \b \c{#}, \c{@}, \c{~} and c\{?} are now valid characters in labels.
2442 \b \c{-e} and \c{-k} options in NDISASM added.
2445 \S{cl-0.90 released October 1996} Version 0.90 released October 1996
2447 First release version. First support for object file output. Other
2448 changes from previous version (0.3x) too numerous to document.