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IAR Embedded Workbench for RH850 generates very compact code, in average about 25% less code than Renesas CCRH for the tested code examples.
This is a code size test on real customer applications where the size of linked code + constants has been compared. The test was performed with the following tools:
IAR Embedded Workbench for RH850 v1.20.0 (EWRH850)
Options: -e -Ohz --relaxed_fp --core rh850 --data_model medium --code_model normal --no_scheduling --lock_regs 0
Renesas CCRH v1.00.01
Options: -Xcommon=rh850 -Xcpu=g3k -c -g -Osize -Xwhole_program -Xalias=ansi -Xinline_strcpy -Xmerge_string -Xdiv -Xuse_fmaf
Results
| Total | 75,0% |
| Application | EWRH850 vs CCRH code size |
| Turbogenerator technology | 81,3% |
| Bluetooth stack | 74,8% |
| Embedded Internet Toolkit | 51,5% |
| Microwave sensor application | 86,5% |
| Reed-Solomon encoding/decoding | 53,7% |
| Dynamic array allocator | 70,6% |
| Misc. math routines including trig. functions | 77,7% |
| Functions to descramble CSS encrypted DVD content | 87,5% |
| Blowfish algorithm | 85,9% |
| Battery charger | 96,7% |
