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- Short: Patches executables to use '020+ math instructions
- Type: util/misc
- Uploader: Mark.Knibbs@lambada.oit.unc.edu
-
- PatchMath020
-
- This program "snoops" through other programs looking for 32 bit
- interger multiply, divide and modulus subroutines and replaces
- them with 68020 multiply, divide and modulus instructions. The
- 68000 only has 16 bit multiply and 16 bit divide (divide a 32 bit
- number by a 16 bit number giving a 16 bit result and a 16 bit
- modulus) instructions. C compilers for the Amiga all generate
- 68000 code so they must make subroutine calls to perform full
- 32 bit math.
-
- This program recognizes several of these library modules and can
- replace 20 or thirty opcodes with two: the multiply or divide
- followed by RTS.
-
- Programs which use 32 bit math intensively may run significantly
- faster after being treated with PatchMath020. A few modified
- programs run 2 to 3 times faster than the originals. A more
- common result is 15 to 20 percent faster due to the fact that
- multiply/divide/modulus is usually a small fraction of the
- instructions executed. As an example, Sculpt 3D's object editor
- runs 15% faster after being modified by PatchMath020. Silver
- runs an additional 40% faster.
-
- Note that the program is modified "in place" so be sure to
- make a backup before running PatchMath020 on you program.
- Also note that these modified programs will no longer run on
- normal Amigas.
-
- [PatchMath020 was supplied with Hurricane accelerator cards. It works with
- many programs, such as SA4D 2.09, Imagine 2.0, etc. It needs to be updated to
- recognise the routines used by recent compilers.]
-
-
- ============================= Archive contents =============================
-
- Original Packed Ratio Date Time Name
- -------- ------- ----- --------- -------- -------------
- 13044 6512 50.0% 02-Jan-90 03:10:26 PatchMath020
- 1349 653 51.5% 15-Nov-93 11:50:30 PatchMath020.doc
- -------- ------- ----- --------- --------
- 14393 7165 50.2% 01-Feb-94 22:03:08 2 files
-