There is a commercial free version available from Mentor Graphics.

Sourcery CodeBench Lite Edition

What we need:

• GNU Binutils
• GNU GCC

Compile to Assembler for viewing

mipsel-none-elf-gcc -S fir.c

The output is fir.s which is the assembler code.

Compile and link ready for simulation with instruction set simulator

mipsel-none-elf-gcc -o fir -Tidt.ld fir.c

Run the code

mipsel-none-elf-run fir

Produce an annoted source code

gcc -fprofile-arcs -ftest-coverage -o fir fir.c

./fir

gcov fir.c

Run with instruction tracing in the simulator

mipsel-none-elf-run –trace-insn=on –trace-file trace fir