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- Short: A powerfull assembly source optimizer - v1.0b
- Uploader: devulder@info.unicaen.fr (Samuel DEVULDER)
- Author: devulder@info.unicaen.fr (Samuel DEVULDER)
- Type: dev/asm
-
- Popt
- ----
-
- Popt is an optimizer of assembly sourcefile. It does various
- standard peephole optimizations by pattern-matching. It ranges from 1
- intruction lookahead to 3 and many more ! It makes more job than usual
- bluid-in assembler optimizer and uses data-flow analysis to find which
- register are used or not. With those informations it is capable of
- deleting intructions that are of no use and re-assigning registers to
- produce a code of better quality/looking. It is specialy powerfull on
- code produced by C-compilers (even those that optimize their code !).
-
- See popt.doc for further explanations.
-
- If you're a fan of benchmarks, here is what Popt is able to do to
- the well-known "DHRYSTONE" Benchmark Program (Reinhold P. Weicker,
- CACM Vol 27, No 10, 10/84 pg. 1013) compiled with the non-registered
- dcc version of DICE, by Matt DILLON:
-
- +=====================================================================+
- | GVP A530 (68EC030@40Mhz) |
- +=====================================================================+
- | | Dhrystones/sec | speed increase |
- +-----------------------------------+----------------+----------------+
- | no opt. (dhr.a) | 6846 | --- |
- | opt. for 68000 (dhr000.a) | 7899 | +15.4% |
- | opt. for 68020/30 (dhr020.a) | 8015 | +17.1% |
- | opt. for 68020/30 (dhr020i.a) * | 8062 | +17.8% |
- | opt. for 68040 (dhr040.a) | 7830 | +14.4% |
- | opt. for 68040 (dhr040i.a) * | 7837 | +14.5% |
- +=====================================================================+
- | Stock A500 (68000@7Mhz) |
- +=====================================================================+
- | | Dhrystones/sec | speed increase |
- +-----------------------------------+----------------+----------------+
- | no opt. (dhr.a) | 775 | --- |
- | opt. for 68000 (dhr000.a) | 912 | +17.7% |
- | opt. for 68020/30 (dhr020.a) | 912 | +17.7% |
- | opt. for 68040 (dhr040.a) | 883 | +13.9% |
- +-----------------------------------+----------------+----------------+
-
- You can find the source code of those programs (dhr.a, dh0?0.a) to
- have a look to the quality of the optimisation. The source is dhr.a and
- the destinations are dhr0?0.a.
-
- This version is a beta version. Little testing has been done. It is
- rather experimantal. Use it at your own risks. Please feel free to
- report any bugs or comments to me.
-
- Happy optimizations !
-
- Sam.
-
- _________________
- * The star indicates that the code uses special 68020+ instructions or
- addressing modes.
-