arithmetics unit in emu

1 files changed, 10 insertions, 6 deletions

diff --git a/pu2/pu2.out.c b/pu2/pu2.out.c
index e13c983..63c41f1 100644
--- a/pu2/pu2.out.c
+++ b/pu2/pu2.out.c
@@ -9,16 +9,19 @@
 // maybe compacter? idk
 // last cpu: 167 chars
 
-// NOTE: if you want the cpu to
-// crash or do something when an invalid opcode is met,
-// replace the `8` in the code with whatever behavior you desire.
-// you can use ({...}) to insert normal code, or use __builtin_trap() for a SIGTRAP
+#define A 8
+// change this for error reporting on unknown instructions!
+// examples:
+// #define A __builtin_trap()
+// ^ does SIGTRAP
+// #define A my_custom_cpu_error_trap()
+// ^ calls my_custom_cpu_error_trap()
 
 // clang-format off
 #define S 1<<20
 #define H !--c
 #define J while
-m[S],c,v,a,b,u;pu2(){J(c=m[m[7]++],v=m[m[7]++],c){H?a=v:H?a=m[b]:H?u?m[a]=b:0:H?v=a,a=b,b=v:H?a+=b:H?a-=b:H?a&=b:H?a=!a:H?u=1:8;u=v;}}
+m[S],c,v,a,b,u;pu2(){J(c=m[m[7]++],v=m[m[7]++],c){H?a=v:H?a=m[b]:H?u?m[a]=b:0:H?v=a,a=b,b=v:H?a+=b:H?a-=b:H?a&=b:H?a=!a:H?u=1:A;u=v;}}
 // clang-format on
 
 // there's just memory. no, really
@@ -54,4 +57,5 @@ char*C="hltimmlodstrswpaddsubandnotacc",*Y[1<<10],*E,*L,i;*K;as2(char*I){J(c=*I+
 
 #undef S
 #undef H
-#undef J
\ No newline at end of file
+#undef J
+#undef E
\ No newline at end of file