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Cream of the Crop 20
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pmb_dhry.h
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/*
*************************************************************************
*
* "DHRYSTONE" Benchmark Program
* -----------------------------
*
* Version: C, Version 2.1
*
* File: dhry.h (part 1 of 3)
*
* Date: May 25, 1988
*
* Author: Reinhold P. Weicker
* Siemens Nixdorf Inf. Syst.
* STM OS 32
* Otto-Hahn-Ring 6
* W-8000 Muenchen 83
* Germany
* Phone: [+49]-89-636-42436
* (8-17 Central European Time)
* UUCP: weicker@ztivax.uucp@unido.uucp
* Internet: weicker@ztivax.siemens.com
*
* Original Version (in Ada) published in
* "Communications of the ACM" vol. 27., no. 10 (Oct. 1984),
* pp. 1013 - 1030, together with the statistics
* on which the distribution of statements etc. is based.
*
* In this C version, the following C library functions are
* used:
* - strcpy, strcmp (inside the measurement loop)
* - printf, scanf (outside the measurement loop)
*
* Collection of Results:
* Reinhold Weicker (address see above) and
*
* Rick Richardson
* PC Research. Inc.
* 94 Apple Orchard Drive
* Tinton Falls, NJ 07724
* Phone: (201) 834-1378 (9-17 EST)
* UUCP: ...!uunet!pcrat!rick
*
* Please send results to Rick Richardson and/or Reinhold Weicker.
* Complete information should be given on hardware and software
* used. Hardware information includes: Machine type, CPU, type and
* size of caches; for microprocessors: clock frequency, memory speed
* (number of wait states). Software information includes: Compiler
* (and runtime library) manufacturer and version, compilation
* switches, OS version. The Operating System version may give an
* indication about the compiler; Dhrystone itself performs no OS
* calls in the measurement loop.
*
* The complete output generated by the program should be mailed
* such that at least some checks for correctness can be made.
*
*************************************************************************
*
* History: This version C/2.1 has been made for two reasons:
*
* 1) There is an obvious need for a common C version of
* Dhrystone, since C is at present the most popular system
* programming language for the class of processors
* (microcomputers, minicomputers) where Dhrystone is used
* most. There should be, as far as possible, only one C
* version of Dhrystone such that results can be compared
* without restrictions. In the past, the C versions
* distributed by Rick Richardson (Version 1.1) and by
* Reinhold Weicker had small (though not significant)
* differences.
*
* 2) As far as it is possible without changes to the
* Dhrystone statistics, optimizing compilers should be
* prevented from removing significant statements.
*
* This C version has been developed in cooperation with
* Rick Richardson (Tinton Falls, NJ), it incorporates many
* ideas from the "Version 1.1" distributed previously by
* him over the UNIX network Usenet.
* I also thank Chaim Benedelac (National Semiconductor),
* David Ditzel (SUN), Earl Killian and John Mashey (MIPS),
* Alan Smith and Rafael Saavedra-Barrera (UC at Berkeley)
* for their help with comments on earlier versions of the
* benchmark.
*
* Changes: In the initialization part, this version follows mostly
* Rick Richardson's version distributed via Usenet, not the
* version distributed earlier via floppy disk by Reinhold
* Weicker. As a concession to older compilers, names have
* been made unique within the first 8 characters. Inside the
* measurement loop, this version follows the version
* previously distributed by Reinhold Weicker.
*
* At several places in the benchmark, code has been added,
* but within the measurement loop only in branches that
* are not executed. The intention is that optimizing
* compilers should be prevented from moving code out of the
* measurement loop, or from removing code altogether. Since
* the statements that are executed within the measurement
* loop have NOT been changed, the numbers defining the
* "Dhrystone distribution" (distribution of statements,
* operand types and locality) still hold. Except for
* sophisticated optimizing compilers, execution times for
* this version should be the same as for previous versions.
*
* Since it has proven difficult to subtract the time for the
* measurement loop overhead in a correct way, the loop check
* has been made a part of the benchmark. This does have
* an impact - though a very minor one - on the distribution
* statistics which have been updated for this version.
*
* All changes within the measurement loop are described
* and discussed in the companion paper "Rationale for
* Dhrystone version 2".
*
* Because of the self-imposed limitation that the order and
* distribution of the executed statements should not be
* changed, there are still cases where optimizing compilers
* may not generate code for some statements. To a certain
* degree, this is unavoidable for small synthetic
* benchmarks. Users of the benchmark are advised to check
* code listings whether code is generated for all statements
* of Dhrystone.
*
* Version 2.1 is identical to version 2.0 distributed via
* the UNIX network Usenet in March 1988 except that it
* corrects some minor deficiencies that were found by users
* of version 2.0. The only change within the measurement
* loop is that a non-executed "else" part was added to the
* "if" statement in Func_3, and a non-executed "else" part
* removed from Proc_3.
*
*************************************************************************
*
* Defines: The following "Defines" are possible:
* -DROPT (default: Not defined)
* As an approximation to what an average C
* programmer might do, the "register" storage class
* is applied (if enabled by -DROPT)
* - for local variables, if they are used
* (dynamically) five or more times
* - for parameters if they are used (dynamically)
* six or more times
* Note that an optimal "register" strategy is
* compiler-dependent, and that "register"
* declarations do not necessarily lead to faster
* execution.
* -DNOSTRUCTASSIGN (default: Not defined)
* Define if the C compiler does not support
* assignment of structures.
* -DNOENUMS (default: Not defined)
* Define if the C compiler does not support
* enumeration types.
*
*************************************************************************
*
* Compilation model and measurement (IMPORTANT):
*
* This C version of Dhrystone consists of three files:
* - dhry.h (this file, containi