BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Help compiling NASM source for a x86 SIMD optimized Jpeg uni          BorlandTalk.com Forum Index -> Delphi Language BASM View previous topic :: View next topic   Author Message Andrea M. Guest Posted: Mon Apr 30, 2007 12:12 am    Post subject: Help compiling NASM source for a x86 SIMD optimized Jpeg uni Greetings, I've found an optimized (very fast!) version of the standard JPEG library. http://cetus.sakura.ne.jp/softlab/jpeg-x86simd/jpegsimd.html "The JPEG library in this distribution uses SIMD instructions if available. On a processor that supports SIMD instructions (MMX, SSE, etc), it runs 2-3 times faster than the original version of JPEG library." It's Japanese, but it's simple understand what is needed to download ;) I've successfully compiled the library with the free Borland BCC5.5, and now I have the .obj needed by Delphi jpeg unit wrapper. But the NASM (Netwide Assembler) .obj seems incompatible with Delphi linker (directive $L} ) "Bad object file format xxxxxx.obj" is the error. Searching on internet seems that "DELPHI linker is quite picky"... I tried several solution and finally get rid of this error "bad object format..." ... but another one appear "Unsatisfied forward or external declaration ..." this time for C++ obj file Someone have an idea how link these objs? Can be interesting this project? I think if work we can have a very fast jpeg unit! Andrea Back to top Bob Gonder Guest Posted: Tue May 08, 2007 9:32 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg Andrea M. wrote: Quote: The problem are the .obj files. I'm trying to modify the jpeglib.h right now...but still the same error "Unsatisfied forward or external..." Doesn't it go on to state exactly which externals are missing? The real clues are in what the message actually says. Without knowing the full message. speculation is unfounded. Back to top Andrea M. Guest Posted: Wed May 09, 2007 6:54 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg On Tue, 08 May 2007 09:32:43 -0700, Bob Gonder wrote: Quote: Doesn't it go on to state exactly which externals are missing? The real clues are in what the message actually says. Without knowing the full message. speculation is unfounded. well, you are right... but ALL the functions declared as external are "unsatisfied". procedure jpeg_CreateDecompress (var cinfo : jpeg_decompress_struct; version : integer; structsize : integer); {$IFDEF LINUX} cdecl; {$ENDIF} external {$IFDEF JPEGSO} 'libjpeg.so' name 'jpeg_CreateDecompress' {$ENDIF}; and this is the error [Error] jpeg.pas(862): Unsatisfied forward or external declaration: 'jpeg_CreateDecompress' The error is the same for all the functions jpeg_stdio_src jpeg_read_header jpeg_calc_output_dimensions etc. if I rename, prefixing them with underscore procedure _jpeg_CreateDecompress (... it's ok, but still remains other "Unsatisfied forward or external declaration": [Error] jpeg.pas(1945): ... '_getenv' [Error] jpeg.pas(1945): ... '_sscanf' and [Error] jpeg.pas(1945): ... '_jconst_merged_upsample_sse2' [Error] jpeg.pas(1945): ... '_jpeg_h2v2_merged_upsample_sse2' those last are for NASM generated obj, but they are not linked directly by Delphi code. I've already used NASM and C obj linking them in delphi without any problem, so I do not know why this library is so difficult to link. Andrea Back to top Bob Gonder Guest Posted: Wed May 09, 2007 9:17 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg Andrea M. wrote: Quote: well, you are right... but ALL the functions declared as external are "unsatisfied". Either naming problems, or you aren't including the proper libs Quote: [Error] jpeg.pas(862): Unsatisfied forward or external declaration: 'jpeg_CreateDecompress' jpeg_stdio_src jpeg_read_header jpeg_calc_output_dimensions etc. if I rename, prefixing them with underscore procedure _jpeg_CreateDecompress (... it's ok, Ok, so those are C functions then? C function names default to leading underscore. Quote: but still remains other "Unsatisfied forward or external declaration": [Error] jpeg.pas(1945): ... '_getenv' [Error] jpeg.pas(1945): ... '_sscanf' C runtime library functions. You probably didn't include the CRTL You could either replace those functions with WinApi functions, or add the appropriate lib to your link. Quote: [Error] jpeg.pas(1945): ... '_jconst_merged_upsample_sse2' [Error] jpeg.pas(1945): ... '_jpeg_h2v2_merged_upsample_sse2' those last are for NASM generated obj, but they are not linked directly by Delphi code. And does your NASM source have the leading underscores in the names? Back to top Andrea M. Guest Posted: Thu May 10, 2007 1:06 am    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg On Wed, 09 May 2007 09:17:06 -0700, Bob Gonder wrote: Quote: Andrea M. wrote: if I rename, prefixing them with underscore procedure _jpeg_CreateDecompress (... it's ok, Ok, so those are C functions then? C function names default to leading underscore. yes, they are all C functions and must be prefixed by an underscore, thanks. Now, the C functions names are solved. Quote: but still remains other "Unsatisfied forward or external declaration": [Error] jpeg.pas(1945): ... '_getenv' [Error] jpeg.pas(1945): ... '_sscanf' C runtime library functions. You probably didn't include the CRTL You could either replace those functions with WinApi functions, or add the appropriate lib to your link. I see, but in the original unit there is no need for those functions... and I wonder what a sscanf and getenv can be useful to a decompressor... But this is not a problem right now, I can replace them with dummy or real functions. The problem is NASM obj Quote: [Error] jpeg.pas(1945): ... '_jconst_merged_upsample_sse2' [Error] jpeg.pas(1945): ... '_jpeg_h2v2_merged_upsample_sse2' And does your NASM source have the leading underscores in the names? yes I've declared in delphi source {$L .\obj\jdmerss2.obj} procedure _jpeg_h2v2_merged_upsample_sse2( var cinfo: jpeg_decompress_struct; input_buf: JSAMPIMAGE; in_row_group_ctr: JDIMENSION; output_buf: JSAMPARRAY); external; and from the jdmerss2.asm: ; jpeg_h2v2_merged_upsample_sse2 (j_decompress_ptr cinfo, ; JSAMPIMAGE input_buf, ; JDIMENSION in_row_group_ctr, ; JSAMPARRAY output_buf); %define cinfo(b) (b)+8 ; j_decompress_ptr cinfo %define input_buf(b) (b)+12 ; JSAMPIMAGE input_buf %define in_row_group_ctr(b) (b)+16 ; JDIMENSION in_row_group_ctr %define output_buf(b) (b)+20 ; JSAMPARRAY output_buf align 16 global EXTN(jpeg_h2v2_merged_upsample_sse2) EXTN(jpeg_h2v2_merged_upsample_sse2): where EXTN is a macro defined as %define EXTN(name) _ %+ name ; foo() -> _foo I still receive Unsatisfied forward ... : '_jpeg_h2v2_merged_upsample_sse2' I do not know, I think the Delphi declaration is correct, so where I'm wrong? Andrea Back to top Bob Gonder Guest Posted: Thu May 10, 2007 7:33 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg Andrea M. wrote: Quote: The problem is NASM obj [Error] jpeg.pas(1945): ... '_jpeg_h2v2_merged_upsample_sse2' I've declared in delphi source If your ASM functions are not needed by the C code, then just use them without the underscores. The leading underscore is for C compatability (ease of use in C). Quote: global EXTN(jpeg_h2v2_merged_upsample_sse2) EXTN(jpeg_h2v2_merged_upsample_sse2): global _jpeg_h2v2_merged_upsample_sse2 _jpeg_h2v2_merged_upsample_sse2: Quote: I still receive Unsatisfied forward ... : '_jpeg_h2v2_merged_upsample_sse2' Did you add the NASM obj to your linker step properly? Probably by adding it to your project? (I dont believe in magic {$L} ) Then too, you can use TDump to see the exported names in your *.obj files. Back to top Sascha Buchner Guest Posted: Wed May 16, 2007 2:55 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg Hi, would you mind posting the results of your work? I would like to try it with Delphi. thank you Sascha Back to top Andrea M. Guest Posted: Wed May 16, 2007 6:20 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg On Thu, 10 May 2007 07:33:51 -0700, Bob Gonder wrote: Quote: If your ASM functions are not needed by the C code, then just use them without the underscores. The leading underscore is for C compatability (ease of use in C). no, the ASM function are only called by C code Quote: Did you add the NASM obj to your linker step properly? Probably by adding it to your project? (I dont believe in magic {$L} ) I think object are linked correctly, in fact, if I use the original .obj distribuited by Borland the unit compile correctly. Quote: Then too, you can use TDump to see the exported names in your *.obj files. Names seems exported correctly. 000064 PUBDEF '_jconst_merged_upsample_sse2' Segment: DATA:0000 00008A PUBDEF '_jpeg_h2v1_merged_upsample_sse2' Segment: CODE:0000 PUBDEF '_jpeg_h2v2_merged_upsample_sse2' Segment: CODE:03A0 0000D6 COMENT Purge: Yes, List: No , Class: 162 (0A2h) Thanks again for your suggestion Bob. Andrea Back to top Andrea M. Guest Posted: Wed May 16, 2007 6:32 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg On Wed, 16 May 2007 11:55:07 +0200, Sascha Buchner wrote: Quote: Hi, would you mind posting the results of your work? I would like to try it with Delphi. of course, no problem for me; I've found jpeg.pas freely with Delphi7 Personal, so I assume no problem for Borland too. http://www.andy2.net/jpeg-ok.7z here the modified package compilable with the free BCC 5 and NASM. http://www.andy2.net/pas-jpeg-unit.7z here the already compiled .obj with the unit jpeg (still not working) with all obj inclusion {$L} and only the first declaration of NASM function _jpeg_h2v2_merged_upsample_sse2 to check if work. Andrea Back to top Bob Gonder Guest Posted: Wed May 16, 2007 7:14 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg Andrea M. wrote: Quote: 00008A PUBDEF '_jpeg_h2v1_merged_upsample_sse2' Segment: CODE:0000 PUBDEF '_jpeg_h2v2_merged_upsample_sse2' Segment: CODE:03A0 Those might need to be Segment _TEXT You might want to TDump the one that works and see any difference. Back to top Sanyin Guest Posted: Fri May 18, 2007 7:50 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg "Andrea M." <info (AT) andy2 (DOT) net> wrote in message news:fg6rbb82tqpi$.1dhkb2mhav46m.dlg (AT) 40tude (DOT) net... Quote: On Thu, 10 May 2007 07:33:51 -0700, Bob Gonder wrote: If your ASM functions are not needed by the C code, then just use them without the underscores. The leading underscore is for C compatability (ease of use in C). no, the ASM function are only called by C code Any news? I am trying to make dll interface..but doesnt work, jpeg_decompress structure is 4 bytes smaller...and I hve corrected it (using dummy variables), now still cant load jpeg..are dll functions STDCALL exported? Back to top Jonathan Benedicto Guest Posted: Fri May 18, 2007 10:26 pm    Post subject: Re: Help compiling NASM source for a x86 SIMD optimized Jpeg Sanyin wrote: Quote: Any news? I am trying to make dll interface..but doesnt work, jpeg_decompress structure is 4 bytes smaller...and I hve corrected it (using dummy variables), now still cant load jpeg..are dll functions STDCALL exported? Because the exports (if I followed this thread correctly) have a leading underscore, they are STDCALL, yes. 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