Philippe, >> ... no time to rewrite them as RENT.
Well - if this is the case then i would not invest into using newer instructions (with the exception of the fairly old "relative & immediate" instructions) You need to understand the code to replace instruction sequences. To make code RENT is far less work. Have you ever looked at ABO. It only covers compiled languages and no assembler. I would invest into converting the code to running baseless. There is return on investment (no more hassle with registers covering the code) and of course SIIS cases are identified and must be fixed. Once this step is complete (code without base)- the next minor step on the way to RENT is to prepare the initialization of the data-areas. This is in MNSHO the better thing to do as opposed to looking for use cases of SIMD cases or places where you could use FLOGR. Martin Trübner; everything around "PoOps of z/arch"
