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- Short: MuLib based math speedup patch for 040/060
- Uploader: thor@math.tu-berlin.de (Thomas Richter)
- Author: thor@math.tu-berlin.de (Thomas Richter)
- Type: util/boot
- Requires: util/libs/MMULib.lha Kickstart V37, MuLib 68040/68060 lib
- Version: 40.4
-
- ------------------------------------------------------------------------------
-
- MuRedox is a MuLib based "on the fly" speedup patch for 68040
- and 68060 based Amiga boards. The 68040 and 68060 do not implement
- all instructions of the MC 68K family. The unimplemented instructions -
- mainly FPU instructions - generate an exception and need to be
- emulated by the 68040 resp. 68060.library. This is the job of the so-
- called "FPSP routines" (floating point support package) within the
- CPU libraries. MuRedox detects these instructions as soon as they
- generate the emulator exceptions, runs a "just-in-time" compiler
- that generates a "stub replacement routine" for this specific
- instruction and patches the replacement routine into the running
- program. Hence, MuRedox replaces the overhead of the emulator
- trap on the next use of the same instruction sequence.
-
- Therefore, MuRedox requires:
-
- - At least an 68040 or an 68060. A 68030 or below implements all
- instructions anyhow and does not require emulator traps at all.
-
- - The mmu.library which is required to setup the special memory
- mapping.
-
- - The fpsp.resource. This resource contains the program code required
- for most unimplemented math functions. This resource is made avail-
- available by the mmu.library-based 68040 and 68060.library.
-
- Therefore, installation of the "MuLib" libraries is *required*.
- Please see the "MMULib.lha" package on Aminet how to install them.
-
- ------------------------------------------------------------------------------
-
- Top reasons why not to use this program:
-
- - It is a hack. MuRedox replaces program code on the fly, hoping that all
- will go well. This need not to be the case - especially commercial
- programs may keep a checksum over their code and may fail if their
- code gets altered. MuRedox will perform such code modifications.
-
- - MuRedox will therefore not work for all programs - some
- incompatibilities should be expected.
-
- If you need faster programs, you should rather:
-
- - Ask the vendor for a 68060 or 68040 specific release of the program
- that does not require the software emulated instructions of the 68040
- resp. 68060. Typically, these versions will run faster than a
- 68020/68030 version with MuRedox, anyhow.
-
- - Remember: Programs are made fast by fast and smart algorithms, not by
- your favourite speedup-patch. MuRedox will give some speed impact,
- in realistic situations in the range of about 10%. Specific bench-
- marks may show more dramatic improvements, but they typically test
- situations that are untypical in a real-life situation. Motorola
- choose less frequently used instructions for software emulation in
- first place, hence improvements are typically marginal.
-
- ------------------------------------------------------------------------------
-
- The THOR-Software Licence (v2, 24th June 1998)
-
-
- This License applies to the computer programs known as "mmu.library",
- "MuRedox", "FPSPSnoop" and the corresponding documentation, known as
- ".readme" files. The "Program", below, refers to such program. The "Archive"
- refers to the package of distribution, as prepared by the author of the
- Program, Thomas Richter. Each licensee is addressed as "you".
-
-
-
- The Program and the data in the archive are freely distributable
- under the restrictions stated below, but are also Copyright (c)
- Thomas Richter.
-
- Distribution of the Program, the Archive and the data in the Archive by a
- commercial organization without written permission from the author to any
- third party is prohibited if any payment is made in connection with such
- distribution, whether directly (as in payment for a copy of the Program) or
- indirectly (as in payment for some service related to the Program, or
- payment for some product or service that includes a copy of the Program
- "without charge"; these are only examples, and not an exhaustive enumeration
- of prohibited activities).
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- However, the following methods of distribution
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- (i) Posting the Program on a public access information storage and
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- (ii) Distributing the Program on a CD-ROM, provided that
-
- a) the Archive is reproduced entirely and verbatim on such CD-ROM, including
- especially this licence agreement;
-
- b) the CD-ROM is made available to the public for a nominal fee only,
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- d) provided further that all information on such CD-ROM is re-distributable
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- Redistribution of a modified version of the Archive, the Program or the
- contents of the Archive is prohibited in any way, by any organization,
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- together, in original and unmodified form.
-
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-
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- Limitations.
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-
- THE PROGRAM IS PROVIDED TO YOU "AS IS", WITHOUT WARRANTY. THERE IS NO
- WARRANTY FOR THE PROGRAM, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. THE ENTIRE
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- IF YOU DO NOT ACCEPT THIS LICENCE, YOU MUST DELETE THE PROGRAM, THE ARCHIVE
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-
-
- Thomas Richter
- ______________________________________________________________________________
-
- So long,
-
- Thomas Richter (October 2001)
-