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Added the plasma sample to the README file.

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Added a comment about loop unrolling to the plasma source.


git-svn-id: svn://svn.cc65.org/cc65/trunk@1016 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2001-10-09 09:34:21 +00:00
parent fc253be753
commit 58da15412c
2 changed files with 18 additions and 8 deletions
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14
samples/README
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@@ -18,27 +18,33 @@ Please note:
List of supplied sample programs: List of supplied sample programs:
--------------------------------------------------------------------------- -----------------------------------------------------------------------------
Name: hello Name: hello
Description: A fancy "Hello world" type program that uses the conio Description: A fancy "Hello world" type program that uses the conio
console I/O library for output. console I/O library for output.
Platforms: Runs on all platforms that support conio, which means: Platforms: Runs on all platforms that support conio, which means:
Apple ][, Atari, C64, C128, CBM510, CBM610, PET, Plus/4 Apple ][, Atari, C64, C128, CBM510, CBM610, PET, Plus/4
--------------------------------------------------------------------------- -----------------------------------------------------------------------------
Name: mousedemo Name: mousedemo
Description: Shows how to use the mouse. Description: Shows how to use the mouse.
Platforms: All systems with mouse and conio support: Platforms: All systems with mouse and conio support:
Atari (untested), C64, C128 and CBM510 Atari (untested), C64, C128 and CBM510
--------------------------------------------------------------------------- -----------------------------------------------------------------------------
Name: nachtm Name: nachtm
Description: Plays "Eine kleine Nachtmusik" by Wolfgang Amadeus Mozart Description: Plays "Eine kleine Nachtmusik" by Wolfgang Amadeus Mozart
Platforms: All systems that have the Commodore SID (Sound Interface Platforms: All systems that have the Commodore SID (Sound Interface
Device): Device):
C64, C128, CBM510, CBM610 C64, C128, CBM510, CBM610
--------------------------------------------------------------------------- -----------------------------------------------------------------------------
Name: plasma
Description: A fancy graphics demo written by groepaz/hitmen.
Platforms: The program needs a VIC but has not been ported to / tested
on the C128, so it does currently run on the CBM510 and C64.
-----------------------------------------------------------------------------
Name: sieve Name: sieve
Description: Implements the "Sieve of Eratosthenes" as a way to find all Description: Implements the "Sieve of Eratosthenes" as a way to find all
prime numbers in a specific number interval. Often used as prime numbers in a specific number interval. Often used as

4
samples/plasma.c
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@@ -112,6 +112,10 @@ static void doplasma (void)
c2A += 2; c2A += 2;
c2B -= 3; c2B -= 3;
for (ii = 0; ii < 25; ++ii) { for (ii = 0; ii < 25; ++ii) {
/* Unrolling the following loop will give a speed increase of
* nearly 100% (~24fps), but it will also increase the code
* size a lot.
*/
for (i = 0; i < 40; ++i, ++scrn) { for (i = 0; i < 40; ++i, ++scrn) {
*scrn = (xbuf[i] + ybuf[ii]); *scrn = (xbuf[i] + ybuf[ii]);
} }