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Merge pull request #916 from xexyl/2015-endoh3

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Landon Curt Noll authored and GitHub committed 2023-07-11 13:12:48 -07:00
2 parents e052f45af9 0fa5413ffe
commit 2d94dca77b
7 files changed
+47 -259
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2015/endoh3/Makefile
+8 -9
View File
@@ -111,7 +111,7 @@ PROG= prog
# #
OBJ= ${PROG}.o OBJ= ${PROG}.o
DATA= DATA=
TARGET= ${PROG} fun bf2pdp11 TARGET= ${PROG}
# #
ALT_OBJ= ALT_OBJ=
ALT_TARGET= ALT_TARGET=
@@ -126,18 +126,17 @@ BACK_TO= mullender.c
all: data ${TARGET} all: data ${TARGET}
@${TRUE} @${TRUE}
.PHONY: all alt data everything clean clobber install \ .PHONY: all alt mullender back_to data everything \
love haste waste maker easter_egg sandwich \ clean clobber install love haste waste maker \
supernova deep_magic magic charon pluto easter_egg sandwich supernova deep_magic magic \
charon pluto
${PROG}: ${PROG}.c ${PROG}: ${PROG}.c
${CC} ${CFLAGS} $< -o $@ ${LDFLAGS} ${BACK_TO} ${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
fun: fun.c mullender back_to: ${PROG}.c mullender.c
${CC} ${CFLAGS} $< -o $@ ${LDFLAGS} ${PROG}.c ${CC} ${CFLAGS} $< -o ${PROG} ${LDFLAGS} ${BACK_TO}
bf2pdp11: bf2pdp11.c
${CC} ${CFLAGS} $< -o $@ ${LDFLAGS} ${PROG}.c
# alternative executable # alternative executable
# #
2015/endoh3/README.md
+34 -45
View File
@@ -21,55 +21,43 @@ make
## Try: ## Try:
```sh To see the original [1984/mullender](/1984/mullender/mullender.c) in action:
cc -o koch koch.c prog.c
./koch
cc -o quine quine.c prog.c
./quine
cc -o pi pi.c prog.c
./pi
cc -DN=50 -o pi pi.c prog.c
./pi
```
For `pi.c` the macro `N` determines the number of digits after initial digit
(which we hope you know :-) ).
And to see the original `mullender.c` in action try the following:
```sh ```sh
cc -o prog prog.c mullender.c cc -o prog prog.c mullender.c # or make mullender or make back_to
./prog ./prog
q q
^C # where ^C is ctrl-C, interrupt. ^C # where ^C is ctrl-C, interrupt.
``` ```
Observe what happens when you hit enter or another character! Send EOF to end Observe what happens when you hit enter or another character! Send INTR to end
the program. the program.
More generally use:
```sh
cc -o prog prog.c foo.c
./prog
^C # if necessary, where ^C is ctrl-C, interrrupt
```
to run `prog` as whatever foo.c is in the joke PDP-11 emulator.
## Judges' remarks: ## Judges' remarks:
Like Marty and Doc, something nostalgic from 1984 appears live in October of Like [Marty](https://en.wikipedia.org/wiki/Marty_McFly) and
2015! [Doc](https://en.wikipedia.org/wiki/Emmett_Brown), something nostalgic from 1984
appears live in October of 2015!
The author of this gem is a true Delorean! The author of this gem is a true
[DeLorean](https://en.wikipedia.org/wiki/DeLorean_time_machine)!
A question for inquisitive readers: is the implemented subset of PDP-11 A question for inquisitive readers: is the implemented subset of PDP-11
instructions Turing-complete? (For a clue, see the end of the author's remarks.) instructions
If in doubt, use [APOUT](https://github.com/DoctorWkt/Apout). [Turing-complete](https://en.wikipedia.org/wiki/Turing_completeness)? (For a
clue, see the end of the author's remarks.) If in doubt, use
The author provided under the section 'One more thing' a program that when [APOUT](https://github.com/DoctorWkt/Apout).
compiled with this entry will generate a gzipped tarball which we have added as
[fun.c](fun.c), built by default through `make all`. To use try:
```sh
./fun > fun.tar.gz
```
for some fun :-) but we also added the tarball [fun.tar.gz](fun.tar.gz).
## Author's remarks: ## Author's remarks:
@@ -78,10 +66,10 @@ for some fun :-) but we also added the tarball [fun.tar.gz](fun.tar.gz).
* A little-endian system is required due to an external factor. * A little-endian system is required due to an external factor.
* Strictly speaking, this program does not comply with any C specification for * Strictly speaking, this program does not comply with any C specification for
the same reason. But I believe it is reasonably portable. the same reason. But I believe it is reasonably portable.
* It uses a GCC extension but works on clang. * It uses a GCC extension but works with clang.
* This is a kind of emulator. You may find its architecture name if you look at * This is a kind of emulator. You may find its architecture name if you look at
the source code from all angles.. the source code from all angles..
* Find main() function. * Find `main()` function.
### Spoiler ### Spoiler
@@ -101,11 +89,11 @@ You can enjoy the legendary winner of the first IOCCC, again.
### Internal ### Internal
This program uses `__attribute__((constructor))`, which is a GCC extension, to This program uses `__attribute__((constructor))`, which is a GCC extension, to
hijack the main function call. And then it interprets main as an instruction hijack the `main()` function call. And then it interprets `main()` as an
sequence. instruction sequence.
It supports the minimal subset of instructions and addressing modes which are It supports the minimal subset of instructions and addressing modes which are
needed for mullender.c to work: needed for [mullender.c](/1984/mullender/mullender.c) to work:
* Instructions * Instructions
* BR: branch * BR: branch
@@ -118,22 +106,23 @@ needed for mullender.c to work:
* Addressing modes * Addressing modes
* 0: Register * 0: Register
* 1: Register deferred * 1: Register deferred
* 2: Autoincrement * 2: Auto-increment
* 4: Autodecrement deferred * 4: Auto-decrement deferred
* 6: Index (incomplete) * 6: Index (incomplete)
### Limitation ### Limitation
Non-trivial combination of instruction and addressing mode may cause undefined Non-trivial combination of instruction and addressing mode may cause undefined
behavior (unsequenced modification), such as attempting to autoincrement a behavior (unsequenced modification), such as attempting to auto-increment a
destination register. Index addressing mode works well only for R7 (PC destination register. Index addressing mode works well only for R7 (PC
register). register).
### One more thing ### One more thing
Note: the program writes a gzipped tarball to stdout. Note: this program writes a binary file to stdout.
```
short main[]={5568,1,-30460,12,2782,0,-29921,2056,-4864,6873,770,30054,11886, short main[]={5568,1,-30460,12,2782,0,-29921,2056,-4864,6873,770,30054,11886,
24948,114,21716,-28851,14043,-8944,32691,-16187,-12247,22692,-9781,-20403, 24948,114,21716,-28851,14043,-8944,32691,-16187,-12247,22692,-9781,-20403,
-11771,16546,18710,17873,9233,31304,-32215,-24382,-28247,-25916,10466,24988, -11771,16546,18710,17873,9233,31304,-32215,-24382,-28247,-25916,10466,24988,
@@ -247,7 +236,7 @@ Note: the program writes a gzipped tarball to stdout.
8203,-25556,13494,30352,29161,30898,1432,-5991,25411,1344,-4019,22299,15685, 8203,-25556,13494,30352,29161,30898,1432,-5991,25411,1344,-4019,22299,15685,
-16401,-23136,-28110,11874,-18945,1879,2,0,-32256,-20996,-18169,29220,12,0,0,0, -16401,-23136,-28110,11874,-18945,1879,2,0,-32256,-20996,-18169,29220,12,0,0,0,
335,-27277,-30776,20480,0}; 335,-27277,-30776,20480,0};
```
## Copyright and CC BY-SA 4.0 License: ## Copyright and CC BY-SA 4.0 License:
2015/endoh3/bf2pdp11.c
-76
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@@ -1,76 +0,0 @@
#include <stdio.h>
int main() {
unsigned short n, mem[32768], *p;
unsigned short *stack[256], **sp = stack, **sp2;
char c;
sp = stack;
p = mem;
*p++ = 0000401; p++; /* BR 1; DAT */
*p++ = 0012700; *p++ = 1; /* MOV #1,R0 */
*p++ = 0012701; *p++ = 0177777; /* MOV #-1,R1 */
for(; (c = getchar()) >= 0; ) {
switch (c) {
case '>':
*p++ = 0005741; /* TST -(R1) */
break;
case '<':
*p++ = 0005721; /* TST (R1)+ */
break;
case '+':
*p++ = 0011102; /* MOV (R1),R2 */
*p++ = 0005722; /* TST (R2)+ */
*p++ = 0077200; /* SOB R2,0 */
*p++ = 0010211; /* MOV R2,(R1) */
break;
case '-':
*p++ = 0011102; /* MOV (R1),R2 */
*p++ = 0077200; /* SOB R2,0 */
*p++ = 0010211; /* MOV R2,(R1) */
break;
case '[':
*sp++ = p;
*p++ = 0011102; /* MOV (R1),R2 */
*p++ = 0005722; /* TST (R2)+ */
*p++ = 0077200; /* SOB R2,0 */
*p++ = 0000401; /* BR 1 */
*p++ = 0000403; /* BR 3 */
*p++ = 0077202; /* SOB R2,-2 */
*p++ = 0011707; /* MOV ???,R7 (need backpatch) */
*sp++ = p++;
break;
case ']':
sp -= 2;
*p++ = 0011707; /* MOV ???,R7 */
*p++ = (*sp - mem) * 2;
*sp[1] = (p - mem) * 2;
break;
case '.':
n = (p - mem) * 2 + 8;
*p++ = 0012702; *p++= 2; /* MOV #2,R2 */
*p++ = 0011112; /* MOV (R1),(R2) */
*p++ = 0104404; *p++ = 2; *p++ = 1; /* call write() */
break;
case ',':
fputs("instruction , (getchar) is not supported\n", stderr);
return 1;
}
}
printf("short main[32768] = { ");
for (n = 0; mem + n < p - 1; n++) {
printf("%d, ", mem[n]);
}
printf("%d };\n", mem[n]);
return 0;
}
2015/endoh3/fizzbuzz.b
-11
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@@ -1,11 +0,0 @@
++++++++++[>++++++++++<-]>>++++++++++>->>>>>>>>>>>>>>>>-->+++++++[->++
++++++++<]>[->+>+>+>+<<<<]+++>>+++>>>++++++++[-<++++<++++<++++>>>]++++
+[-<++++<++++>>]>>-->++++++[->+++++++++++<]>[->+>+>+>+<<<<]+++++>>+>++
++++>++++++>++++++++[-<++++<++++<++++>>>]++++++[-<+++<+++<+++>>>]>>-->
---+[-<+]-<[+[->+]-<<->>>+>[-]++[-->++]-->+++[---++[--<++]---->>-<+>[+
+++[----<++++]--[>]++[-->++]--<]>++[--+[-<+]->>[-]+++++[---->++++]-->[
->+<]>>[.>]++[-->++]]-->+++]---+[-<+]->>-[+>>>+[-<+]->>>++++++++++<<[-
>+>-[>+>>]>[+[-<+>]>+>>]<<<<<<]>>[-]>>>++++++++++<[->-[>+>>]>[+[-<+>]>
+>>]<<<<<]>[-]>>[>++++++[-<++++++++>]<.<<+>+>[-]]<[<[->-<]++++++[->+++
+++++<]>.[-]]<<++++++[-<++++++++>]<.[-]<<[-<+>]+[-<+]->>]+[-]<<<.>>>+[
-<+]-<<]
2015/endoh3/fun.c
-116
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@@ -1,116 +0,0 @@
short main[]={5568,1,-30460,12,2782,0,-29921,2056,-4864,6873,770,30054,11886,
24948,114,21716,-28851,14043,-8944,32691,-16187,-12247,22692,-9781,-20403,
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-8336,31433,16695,-14773,26819,3096,-12584,-28808,17825,-21200,-32399,15877,
-28890,-3728,-27126,21375,-32630,-7615,32004,-29230,-6611,-5508,-28921,12418,
27204,-5725,9643,3520,26836,-29347,2101,-29311,9320,29287,-29990,-6593,29825,
-29114,16232,25641,20672,-23501,-32127,-6546,-956,10474,-29647,1070,5516,13760,
-27814,-32488,-28006,-17968,-3146,10963,19234,22132,23988,7142,5523,9639,-6888,
-11428,7964,23099,-16822,16518,31109,-12958,10351,2434,3091,3625,2244,27512,
-28559,-10724,-19377,23625,30056,11478,-21176,27660,26517,-29037,-9390,12297,
-11903,5980,-21927,-7483,6671,11249,29638,-23827,-26358,-6856,-1063,-5303,
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-13111,-9062,6274,-20002,24150,22189,-14965,-31249,-13934,-6341,-18384,-32054,
-29246,10622,-9260,19428,-15485,2724,23810,16447,11627,18604,2739,27812,30295,
-21538,-31786,11355,-11308,-9006,-4987,25363,-18927,-21130,-31213,-27411,17231,
-19608,20232,27754,16476,11213,-19803,-24048,30918,-25329,21233,-10160,13519,
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10147,17724,533,-10055,27076,10264,11274,-10511,4809,25208,16065,-5105,-19953,
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9646,-7389,-11384,-29116,-4100,160,18394,7856,738,-25920,12148,24713,-31664,
8203,-25556,13494,30352,29161,30898,1432,-5991,25411,1344,-4019,22299,15685,
-16401,-23136,-28110,11874,-18945,1879,2,0,-32256,-20996,-18169,29220,12,0,0,0,
335,-27277,-30776,20480,0};
2015/endoh3/hello.b
-1
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@@ -1 +0,0 @@
++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.
thanks-for-fixes.md
+5 -1
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@@ -24,7 +24,7 @@ much** for your help!
A good number of the [past winners of the IOCCC](winners.html) A good number of the [past winners of the IOCCC](winners.html)
tested, identified and helped correct and/or improve the write-ups tested, identified and helped correct and/or improve the write-ups
of follow IOCCC winners for the year that they won. The list of of fellow IOCCC winners for the year that they won. The list of
those past winners is too long to mention: nevertheless the those past winners is too long to mention: nevertheless the
[IOCCC judges](judges.html) **very much appreciate** those who [IOCCC judges](judges.html) **very much appreciate** those who
helped improve the presentation of their fellow IOCCC winners. helped improve the presentation of their fellow IOCCC winners.
@@ -1413,6 +1413,10 @@ Cody fixed this to compile with linux which was having a problem with duplicate
symbols of `main()`. The fix is through the option `-fcommon` which will let it symbols of `main()`. The fix is through the option `-fcommon` which will let it
compile like it does with macOS. compile like it does with macOS.
Cody also made it easier to enjoy the theme of [Back to the
Future](https://en.wikipedia.org/wiki/Back_to_the_Future) using this entry by
simply typing `make back_to` or `make mullender`.
## [2015/hou](2015/hou/prog.c) ([README.md](2015/hou/README.md)) ## [2015/hou](2015/hou/prog.c) ([README.md](2015/hou/README.md))