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Vector Pascal
Vector Pascal is a language targeted at SIMD instructionsets such as the MMX and the AMD 3d Now. It currently supports
the 486,
the Pentium,
the K6 and
the P3 processors.
It supports parallel vector operations, loop unrolling, common sub expression removal.
It is implemented in Java, and class libraries are currently available for download
Overview
An overview article in .pdf format.
A comparison with other languages and implementation details are given in Vector Pascal an Array Language. A .pdf and a .ps version are also available.
Reference manual
.pdf version
postscript version
.html version, note that some formulae do not appear correctly in the html version.
The code generator technology used to retarget the compiler to different platforms is documented in: Direct compilation of high level languages to multi media instructionsets. Covers use of MMX, 3DNOW and SIMD instructions to obtain parallelism. Also available as HTML
Speedups
Vector Pascal provides considerable speedups on vector loop based applications:
Performance on vector kernels
|
TMT |
BP 286 |
DP 486 |
VP 486 |
VP K6 |
test |
|
|
71 |
80 |
46 |
166 |
333 |
2329 |
unsigned byte additions |
|
55 |
57 |
38 |
110 |
179 |
2329 |
saturated unsigned byte additions |
|
85 |
59 |
47 |
285 |
291 |
466 |
32 bit integer additions |
|
66 |
74 |
39 |
124 |
291 |
1165 |
16 bit integer additions |
|
47 |
10 |
33 |
250 |
291 |
388 |
real additions |
|
49 |
46 |
23 |
98 |
146 |
2330 |
pixel additions |
|
67 |
14 |
39 |
99 |
146 |
1165 |
pixel multiplications |
|
47 |
10 |
32 |
161 |
146 |
141 |
real dot product |
|
79 |
58 |
33 |
440 |
161 |
166 |
integer dot product |
DevP - Dev Pascal
version 1.9
TMT - TMT Pascal
version 3
BP 286 - Borland Pascal
compiler with 287 instructions enabled range checks off.
DP 486 - Delphi
version 4
VP 486 - Vector
Pascal targeted at a 486
VP K6 - Vector Pascal
targeted at and AMD K6
All figures in millions of operations per second on a 1 Ghz Athlon.
Vectorisation gains with P3 and Athlon processors
|
|
Athlon |
|
|
operation |
% vectorisation speedup |
% vectorisation speedup |
|
byte+ |
423 |
599 |
|
byte +: |
1126 |
1201 |
|
int + |
75 |
60 |
|
short + |
332 |
300 |
|
real + |
62 |
33 |
|
pixel + |
814 |
1496 |
|
pixel * |
290 |
698 |
|
real dot product |
29 |
-3 |
|
integer dot product |
-4 |
3 |
Figures give the % speedup from using native code generators versus generic 486 code generators on a 450Mhz P3 and a 1Ghz Athlon.
Download
The following Pascal Compiler downloads are available:
Linux release, compiler version 0.13, code generator version 0.07 as a .jar file. Please download the manual for details of system setup and requirements.
Compiler version 0.53 code generator version 0.34 is available as: linstall0_53_0_34.jar.
Compiler version 0.58 and code generator version 0.34 is available as: linstall0_58.jar. This version fixes the following bugs:
1. Passing of var parameters which are themselves pointers is handled correctly.
2. Loop iteration variables for parallel code were previously stored in ram, now they are cached in registers when sufficient are available.
Binary compiler version 1.59 available as windows release Adds operator overloading, complex arithmetic, new array permutaion operations, conditional expressions.
Binary compiler version 1.81 for Linux and for Windows. Adds some new opcode definitions, fixes bugs found when compiling the Dhrystone benchmark.
Build 3.203 for windows incorporates some bug fixes and the Viper IDE for vector pascal.
Source downloads
Latest source release build 3.203 in the jar file src.jar.
There is a make file available in the top level directory. System is implemented in Java. The code generation tools use the Sable parser generator from McGill University. Sources for this are included in the ca/Mcgill/Sable directory. Jlex is used to provide the Pascal Lexical analyser.
Keywords: Pascal, free Compiler, MMX, Vector, SSE, 3Dnow!
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