Hi!
18-Янв-2007 11:31 [EMAIL PROTECTED] (Japheth) wrote to
freedos-user@lists.sourceforge.net:
>> Better than watcom? How much better and in which areas?
J> In Open Watcom just the 32bit C(++) compiler and WD are pretty good. The rest
J> is of "mixed" quality.
J> With optimisation on MSVC CL.EXE beats OW WCC.EXE significantly both in speed
J> and binary size (not counting the CRT part).
May you show examples? Starting from minimal "void main(){}", then with
printf("Hello, world!\n"), then something more complex? With OW 1.6:
>type test1.c
void main () {}
>wcl test1.c
Open Watcom C/C++16 Compile and Link Utility Version 1.6
wcc TEST1.C
Open Watcom C16 Optimizing Compiler Version 1.6
Code size: 7
wlink @__wcl__.lnk
creating a DOS executable
>type test2.c
#include <stdio.h>
void main () { printf ("Hello, world!\n"); }
>wcl test2.c
Open Watcom C/C++16 Compile and Link Utility Version 1.6
wcc TEST2.C
Open Watcom C16 Optimizing Compiler Version 1.6
Code size: 17
wlink @__wcl__.lnk
creating a DOS executable
>dir *.exe
TEST1 EXE 1 196
TEST2 EXE 8 736
Issue here is only in fat RTL.
J> One reason for this might be: although the OW 16-bit compiler WCC has
J> switches
J> to optimize for 386/486/Pentium/PPro it doesn't seem to use the 32-bit
J> registers if one of these switches is set.
?! Using 32-bit instructions in 16-bit programs may be useful, but this
is another story. How this relates to difference in generating 16-bit code?
J> The one 32bit opcode I was able to
J> find is the "PUSH dword ptr [x]" to push an (unsigned) long parameter for a
J> function call.
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