LINPACK benchmark for Atari TOS

This is the famous LINPACK benchmark to measure the floating-point performance of Atari machines running TOS (or MiNT). It requires at least a 68020 CPU and a FPU. It solves a linear equation system and is used to evaluate the performance of computers and super-computers since 1979.

The source code for linpack.tos was taken verbatim from this C version of the Benchmark: http://www.netlib.org/benchmark/linpackc.new.

The original benchmark (written in FORTRAN) is also included as linpackd.tos. The source code was taken from here: http://www.netlib.org/benchmark/linpackd. This was compiled with GNU Fortran 8.3.0.

Results

Note that to some degree the results depend on the compiler that is used and on its options. All subsequent results were obtained with the binary of the C version of the benchmark (linpack.tos) in this repository, with double precision and using the default array size when prompted (200, which results in a n=100x100 matrix to be solved).

System	Result in kFLOPS	Remarks
ST with PAK/2 68020 and 68881 FPU @ 25 MHz	85	Source: https://forum.atari-home.de/index.php/topic,15025.msg249259.html#msg249259
Falcon @ 16 MHz + 68882 FPU	111	Source: https://forum.atari-home.de/index.php/topic,15025.msg254358.html#msg254358
PAK68/3-020 + 68881 FPU, both @ 32 MHz	180	Source: https://forum.atari-home.de/index.php/topic,15025.msg254546.html#msg254546
Stock TT, FPU @ 32 MHz	217	Source: https://forum.atari-home.de/index.php/topic,15025.msg237349.html#msg237349
TT, CPU & FPU accelerated @ 48 MHz	281
PAK68/3-020 + 68882 FPU, both @ 40 MHz	343	Source: https://forum.atari-home.de/index.php/topic,15025.msg254585.html#msg254585
CT2A Falcon	415	Source: https://forum.atari-home.de/index.php/topic,15025.msg237349.html#msg237349
Milan040 under MagiC	1695	Source: https://forum.atari-home.de/index.php/topic,15025.msg237349.html#msg237349
Milan060	4144	Source: https://forum.atari-home.de/index.php/topic,15025.msg237349.html#msg237349
CT63 @ 95 MHz under MiNT	7590	Source: https://forum.atari-home.de/index.php/topic,15025.msg237349.html#msg237349
Vampire V4SA @ 85 MHz (core January 2021)	8663	Source: https://www.atari-forum.com/viewtopic.php?p=412437#p412437

A long list of results of different systems is available in the report “Performance of Various Computers Using Standard Linear Equations Software”.