NetNews Usenet Archive 1992 #31

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Internet Message Format | 1992-12-26 | 15.9 KB

Path: sparky!uunet!wupost!waikato.ac.nz!comp.vuw.ac.nz!durie.amigans.gen.nz!liam Newsgroups: comp.sys.amiga.programmer Subject: Re: DICE 2.06.39 to 2.06.40 changes Message-ID: <liam.0b4v@durie.amigans.gen.nz> From: liam@durie.amigans.gen.nz (Liam Greenwood) Date: 24 Dec 92 22:42:01 GMT+12 References: <1992Dec20.014959.12792@newshub.ccs.yorku.ca> Organization: It's Home, really... X-Newsreader: TIN [version 1.1 PL6] Lines: 385 W L Anderson (wlanders@nexus.yorku.ca) wrote: > Could someone post the version.doc file for DICE 2.06.40? I've > got 2.06.39, and I'm wondering what the changes are. VERSION.DOC DICE 2.06.40 * Updates after the first free one will be upped to $15 (they used to be $10) as of 1 Jan 1993. B bug in commodore IEEEDPFix() routine found (it would trash D3), hack put in library code to save/restore D3 to get around it. B bug in switch() found relating to switch(unsigned_char), would not 'find' certain cases when the overall case range is greater than 128. (I wrote a comprehensive test program to construct random C switch statements with all signed/unsigned int types to ensure that switch() is really fixed this time!) B bug in structure copying code for word-aligned structures would mess up the last word in some cases. (doesn't occur with long aligned structures) B bug in constant floating point divide fixed, 0.0/<fpconst> would cause an endless loop in DC1. B bug in structural returns of the format return (*struct_ptr) has been fixed. Straight structural returns 'return(structure)' were not effected. B bug in casts to void fixed, previously generated an error, now allowed (no error message). 2.06.39 F lstat() function added, understands soft links under 2.0 F -unix option added to DCC F -O0 option added to DCC (objects go to current directory instead of T:) F setvbuf() was calling _CreatePort() for csr.lib instead of @CreatePort() F DICE now supports explicit register specification for arguments to procedures through new storage qualifiers __D0, __D1, etc... i.e. int fubar (__D0 int, __A0 char *); int fubar(a, p) __D0 int a; __A0 char *p; { ... } F -mu option added to DCC/DC1, enables unix-style common storage. Not currently compatible w/ standard amiga object module format. 2.06.38 B fputc() would return a signed char, so fputc(0xFF, ..) would return -1 instead of 255. B long % long would return incorrect results for negative arguments to the modulus (result would be the wrong sign) B link error w/ large-data model combined with -gs fixed B strstr(str, "") used to return NULL. It now returns str. B bug in auto (stack) char arrays that are auto-aggregate initialized fixed. An odd sized array initializied like: char ary[31] = "abc.."; would crash a 68000 due to an odd-aligned longword access. Fixed. 2.06.37 B arrays are now aligned the same as their element type alignment. Thus, char a[3]; is byte aligned while short a[3]; is word aligned. Previously arrays were always word aligned. (not really a bug, but required to work with Amiga cia structures) F PROFILING ADDED. New -prof option to DCC, LIBMAKE, and FDTOLIB. This tool gives you unmatched profiling capabilities. You may profile just your source, standard C calls, amiga library calls, or any combination. A <programname>.dprof file is automatically generated when your program exits and may be turned into a textual representation with the DPROF program. Profiling routines have a 1 uS granularity under 2.0, 20 mS granularity under 1.3. __noprof qualifier for procedures added -- prevents a procedure from being profiled (used by the system to prevent the profiler routine from getting profiled itself) F C.LIB renamed to CS.LIB to generalize library names. Infix IDs are now generalized as follows: L large data model S small data model R registered args, else stack args (registered release only) P profiled, else not profiled. DCC will now use the -prof and -md/-mD options to determine which c.lib and amiga.lib to use. The more useful combinations are included in the distribution and registered users may make additional versions as needed. Note that you may mix options -- it is perfectly valid to compile source modules with -mD but link small-data. BL bug in fread() fixed relating to an fread() occuring after an ungetc(). E ALL LIBRARIES IN THE SYSTEM REORGANIZED. There are now many more libraries. Registered users now have a means of remaking *ANY* library from scratch by unpacking the library source code and typeing 'dmake' with no arguments for instructions. Generally only the DTMP: assignment and -2.0 in your DCCOPTS is required. Since there are many more libraries possible then I can fit in the distribution, this means may be used to create esoteric libraries that the majority of people will never use. F Fixed two major bugs with constant floating point arithmatic... addition and subtraction would not work correctly in a few cases (it would get the sign wrong), the exponent would get screwed up in some cases (usually after a negation), and I was overflowing the single-precision exponent range for conversions to type float. Ooooo this stuff should have been caught long ago! F Fixed a pointer arithmatic bug, yet another case where a scratch register would get overwritten due to a procedure call. 2.06.36 B register allocation bug fixed, related to floating point routines mainly. Would generate a 'Too many redos' error in some cases (bug did not generate bad code). F PRECOMPILED INCLUDES ADDED, see -H option in DOC/DCC.DOC. 2.06.35 FL under 2.0 (V37), getenv() now checks for local enviroment variables before global ENV: variables. Under 1.3 only global ENV: variables are checked for. BL fixed %U and %W in strftime(), would generate incorrect week-of-year B fixed stringize operator for \n, i.e. quoteme(fubar\n) -> "fubar\n", would previously generate incorrect result (I think) B fixed bugs in integer multiply & divide, some cases would generate fatal errors (all caught by DICE) B fixed bug &= operator, would generate assembly error in conditional: while (x &= (x - 1)) ... F optimizations made to mulitply & divide, handles 16 bit expressions better. F minor optimization added for procedure calls within the same module. If call is within a byte offset then BSR.B will be used, else BSR.W is used. F DLink now checks for illegal small-data references to far objects and generates the appropriate error message. This was added for completeness and also because __far or -mD data objects are no longer A4-relative. The check will catch illegal model mixing. 2.06.34 BL bug in <varargs.h> (old style var-args) fixed, was skipping first argument. Note that all ANSI projects should use <stdarg.h> 2.06.33 B bug in offsetof(type, array_elm) fixed, previously caused error message. 2.06.32 B fixed bug in dlink Introduced in .31 that would cause a machine crash. 2.06.31 B fixed floating point bug relating to array indexing, would clobber A0 in some cases B fixed preprocessor bug relating to the use of hex constants in #if expressions (they wouldn't work) E redid the handling of the ?: routine to allocate its result storage (a temporary register) after running the sub-expressions instead of before, which allows you to nest ?: indefinitely without generating an too-many-redos error. B register allocation bug (would generate fatal error) in &array (redundant & operator) has been fixed. B DCPP now accepts null directives. # with no directive. 2.06.30 F DCPP now evaluates undefined symbols in #if expressions as 0 instead of generating an error message, as per ANSI. B Yet another bug in the # (stringtize) operator found. Fixed. Really really really should work right this time! B bug in switch/case fixed, case <enumid>: would generate an error message. BA I was shipping the wrong mathieeedoub*.library shared libraries, would cause erronous float->double conversion. B another floating point bug found in && and || of the form 'fp && fp' or 'fp || fp', would cause incorrect evaluation and/or assembly error B small bug in fread() would sometimes set error flag when returning EOF, and fseek() would not reset this flag (it does now). BL bug in *scanf(), %c would overwrite the char by one byte (i.e. store into two chars instead of one). fixed. B DCPP didn't handle a quoted /* in directives correctly. F Large programs that have more than 64K of *initialized* data may now use either __far for selected items (preferable) or -mD without causing link errors. Previously dlink would combine far data along with near data making all small-data referenced bss items out of range if more than 64K of initialized data had been declared, __far or not. Now, DC1 generates 'fardata' sections properly when -mD or __far is used (previously only worked with __far), and dlink will not combine any section name beginning with 'far' into the small data model. This is only of major import when compiling incredibly huge programs. Note that having greater than 64K of bss with -mD or __Far has always been supported since library bss is always forced in front of program bss. F DLink now takes approximately 15% less memory. While it still requires memory to hold the combined size of all objects and libraries, incidental memory requirements now reuse much of this memory from unlinked sections instead of allocate new memory. 2.06.29 B another long standing bug found: short a = i * j; where i and j are long's and *also* a memory reference (not in regs), the multiplication short-result optimization was screwed up. B register allocation bug (would produce a fatal error) fixed, registers would not be deallocated in constant conditional expressions such as: 1 ? (a = 4) : b; 2.06.28 B really dumb bug fixed, made retroactive to 2.06.27 (all 2.06.27 dists were redone with this fixed). Had been introduced in 2.06.27 2.06.27 E add -// option to DCC and DCPP, enables C++ style // comments. If not specified, // style comments are ignored. Generally one puts -// in DCCOPTS. E added -no-env option for DCC. If specified, DCC will *not* load options from DCCOPTS. B fixed bug: static int fio(), fio(); (procedure declared twice on same line) would force procedure to be non-static. fixed bug: __geta4 int fio(), bar(); ... __geta4 would apply only to first procedure. B fixed bug w/ labels ... label: case ... would generate error message (case or default following directly after label). Was introduced when I initially fixed labels. E AUTO-AGGREGATE INITIALIZATION ADDED, e.g. main() { int a[] = { 1, 2, 3 }; ... }. static & global initialization has been re-vamped. Note that bit-field aggregate initialization is NOT supported yet. B Fixed bug that has been in there from the beginning. int *a; a[20000] = 1; ... would not multiply the constant by 4 to get the index. ONLY EFFECTED CONSTANT INDEXES WHOS OFFSET WOULD BE LARGER THAN A SIGNED SHORT, which is why it was not caught. B Fixed bug in float point stack allocation... temporary fp variables from the previous procedure would not properly be cleared from the cache, causing erronous stack offsets (that overlap other variables) in the next procedure. E Added ANSI 'U' extension for constants, e.g. 123U. DICE now automatically promotes a constant to unsigned if it does not fit in a signed long, such as 4000000000. Note, however, the int->float conversion is currently always signed due to lack of unsigned->float calls in the amiga's shared fp libraries. B small bug in fread(), would not set the EOF flag when an EOF occurs for an fread() requesting a buffer size larger than the stdio buffer size. B when making a registered-args call (-mr, -mR, -mRR) where a pointer - int subtraction occurs, i.e. foo(ptr - int, int), arguments after the argument containing the ptr - int would be incorrect (registers would get squashed). ONLY applies to registered-args calls. This has been fixed! B bug in preprocessor fixed, #define fubar(x) "a x a" would replace the 'x' in the string, which is wrong. B bug with bitfields has been found and fixed. Essentially, bitfield operations in routines that need to run a retry pass can get munged. This is usually caused by routines that declare lots of local variables. 2.06.26 B Fixed bug in floating pt compare of the form: x = (f1 == f2); i.e. a compare where the result is a boolean 0/1 when not in a conditional. Was caught by DICE (caused a fatal error). B Fixed bug w/ bitfields (was caught by DICE), would give fatal error if destination was not a register for field extraction. B fixed bugs with stringtize operator in macros, should now work according to the ANSI spec. #define fubar(x) #x BL month was off by one for %m operator in strftime() E PROCEDURES MAY NOW RETURN STRUCTURES. YOU MUST PROTOTYPE ALL SUCH PROCEDURES. E added // comments to DCPP (C++ style comments) 2.06.25 E doc/errors.doc now exists, error handling centralized. E a printer driver and exec device driver example has been added to examples/ ... so now I have a shared library example, dos device driver example, EXEC device driver and printer driver example. 2.06.24 B stack allocation changes in 2.06.23 were broken, broke floating point. (got the stack tracking mixed up w/ variable allocation) B ?: fix in 2.06.23 was broken (sigh), fixed ... 'default:' would not be properly tokenized. E *scanf() now supports %e/E/f/g/G and %[..] 2.06.23 BETA B goto labels are now in their own name space, no more conflicts with int a; ... goto a; ... a: ... F added stack tracking for fp temporaries, meaning that subroutines containing floating point expressions do not take up anywhere near the amount of stack they used to. F allows declarations after switch() { and before first case. F fixed problem with ... ? symbol : ... (symbol was being interpreted as a label instead of a variable within a ?: conditional F fixed problems with conditional returns from fp operations, such as: double a, b; int c = (a < b); that must generate a 0/1 result instead of a branch (as in an if()). Would generate error before. version trace for 2.06.22 and below retired -- Liam Greenwood ------ liam@durie.amigans.gen.nz ------ Wanganui, N.Z. Don't tell my Mother I'm a programmer, she thinks I'm a piano player in a brothel