Small Device C Compiler
SDCC is a
Freeware ,
retargettable, optimizing ANSI - C compiler. The
current version targets the Intel 8051
and recently
the Zilog Z80
based MCUs. SDCC can
be retargeted for other 8 bit MCUs or PICs and some day soon will be.
The entire source code for the compiler is distributed under GPL.
SDCC uses ASXXXX and ASLINK a Freeware, retargettable assembler and
linker. SDCC has extensive MCU
specific language extensions, which lets it
utilize the underlying hardware effectively. The front end (parser) will
be enhanced to handle language extensions for other MCUs as and when they
are targeted. In addition to the MCU Specific optimizations SDCC also does
a host of standard optimizations like global sub expression
elimination, loop optimizations (loop invariant , strength reduction of
induction variables and loop reversing ), constant folding and
propagation, copy propagation, dead code elimination and jump tables for
'switch' statements. For the Back end SDCC uses a global register
allocation scheme which should
be well suited for other 8 bit MCUs , the peep hole optimizer uses a rule
based substitution mechanism which is MCU independent. Supported data
types are short
(8 bits, 1 byte), char
(8 bits, 1 byte) , int (16 bits,
2 bytes ), long
(32 bit, 4 bytes) and float
(4 byte IEEE). SDCC also comes
with the source level debugger SDCDB, the current version of
the debugger uses Daniel's s51 simulator. The compiler also allows
inline assembler
code to be embedded anywhere
in a function. In addition routines developed in assembly can also be
called. SDCC also provides an option to report the relative complexity of
a function, these functions can then be further optimized , or hand coded
in assembly if need be.
What Platforms are Supported
? | Currently Linux
(and other unices) and MS-Windows are supported. SDCC will compile
natively on Linux using gcc. Windows
95/NT users will need to download the full development version of CYGWIN32
from http://sourceware.cygnus.com/cygwin/. Note: Cygnus distributes CYGWIN32 in two packages you will need the full development package, this contains the compiler and other utilities that you will need to compile SDCC, compiling the system with any other compiler under MS/Windows has not been tried. Note: It has been reported recently that an older version 2.1.9Ca has been compiled on the win32 platform with a copy of Borland C++. More as the story unfolds.
Downloading SDCC
| The SDCC source tree is currently located at SourceForge. The current version is 2.1.9Ga:
You can also browse the archives The CVS tree
for all current development of SDCC can be accessed
at: You can browse our CVS tree here. SourceForge has
further documentation on accessing a CVS tree here. SDCC v2.2.0 is coming soon. As of February 27, 2000, work on v2.2.0 is moving along but there are still a few compile problems to be worked out. Sandeep expects the next release possibly in March. This will be a big step in the development of SDCC as it will now support the Z80. The next few 2.x releases will be mostly bug fixes (if there are any ;-) and speed improvements. SDCC and the included support packages come with fair amounts of documentation and examples. When that isn't enough, you can find help in the following places:
PcGenerator EpromProgrammer,Pic24C
and more...
Last
updated: |
