STxP70 is a compiler that manages the stages of the compilation process: preprocessing, compiling into assembly language, assembling and linking. The assembler file is compiled using stxp70-as and linked using stxp70-ld to provide an STxP70 binary image. All these phases are hidden using the driver tool stxp70cc. This compiler supports the ANSI C89 standard and partially supports the ANSI C99 standard.
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GNU C language parser
State-of-the-art optimizations
Hardware loop mechanisms
Special addressing modes
Memory space optimization
Instruction scheduling
Compiler intrinsics and built-ins support
Support for X3, FPX, and MPx extensions
The purpose of the STxP70 compilation driver (stxp70cc) is to manage the stages of the compilation process: preprocessing, compiling into assembly language, assembling and linking. The assembler file is compiled using stxp70-as and linked using stxp70-ld to provide an STxP70 binary image. All these phases are hidden using the driver tool stxp70cc.
This user manual provides detailed information to enable users to write efficient code optimized to run on the STxP70 processors and to compile and link it ready for execution by sxrun. The manual covers: stxp70cc driver options, pragmas supported by stxp70cc, compiler optimization techniques, GNU C language extensions, GNU asm construct, built-in functions.
The load/run tool sxrun and the STxP70 debugger sxgdb are described in the STxP70 Professional Toolset user manual (7833754).
How does the STxP70 compiler manage floating-point arithmetic and the float type?
The STxP70 compiler assumes double precision by default but can be instructed to use single precision via the -fshort-double option. Floating-point support can be managed with -mlib-nofloat to reduce library size, while the -trapuv option initializes float variables to a NaN pattern for debugging. Floating-point arithmetic is enabled by connecting the FPx extension via -Mextension=fpx.
