From 450ced09c93ecb9c1c2c4c97fe2dde29439dac8f Mon Sep 17 00:00:00 2001
From: Moon Flower <moon@coffin.ir>
Date: Mon, 18 Aug 2025 11:59:33 +0330
Subject: ppu isn't useful. i'll just go back to pu2

---
 ppu/code.p2p |   1 +
 ppu/ppu      | Bin 0 -> 17464 bytes
 ppu/ppu.c    | 155 +++++++++++++++++++++++++++++++++++++++++++++++++++--------
 3 files changed, 137 insertions(+), 19 deletions(-)
 create mode 100644 ppu/code.p2p
 create mode 100755 ppu/ppu

diff --git a/ppu/code.p2p b/ppu/code.p2p
new file mode 100644
index 0000000..596ca02
--- /dev/null
+++ b/ppu/code.p2p
@@ -0,0 +1 @@
+@1048566 movi 1 1
\ No newline at end of file
diff --git a/ppu/ppu b/ppu/ppu
new file mode 100755
index 0000000..addbcf2
Binary files /dev/null and b/ppu/ppu differ
diff --git a/ppu/ppu.c b/ppu/ppu.c
index 9b4fc5a..0111d97 100644
--- a/ppu/ppu.c
+++ b/ppu/ppu.c
@@ -1,13 +1,16 @@
+// c89 doesnt support inline, so we get rid of it
 #define inline
 
 #include <ctype.h>
+#include <limits.h>
 #include <omp.h>
 #include <stdio.h>
 #include <string.h>
+#include <time.h>
 
 #pragma clang diagnostic ignored "-Wreturn-type"
 
-typedef char* string;
+typedef char *string;
 
 // opcodes!
 // 0: halt
@@ -22,36 +25,150 @@ typedef char* string;
 // program counter is m[0]
 // Q is set to the previous A in memory
 
+#define S 1 << 22
+m[ S ] = { 0 }, c, N, Q, E;
+
+// comment to disable cpu batch counter which guesses how many branches to run
+#define __PPU_BATCH_COUNTER
+
+#ifdef __PPU_BATCH_COUNTER
+    #define BC (N = run_batch_counter())
+#else
+    #define BC ({})
+#endif
+
+#define MAX_BATCH_COUNT 16
+
+run_batch_counter() {
+    int  max_value = MAX_BATCH_COUNT;
+    int  bcup_c    = 0, i_count, j_count;
+    int  bcupt[ MAX_BATCH_COUNT ];
+    int *M = m;
+    // effects table
+    static const string effW = "001111111";
+    static const string effR = "001010101";
+
+    for (i_count = 0; i_count < MAX_BATCH_COUNT; i_count++) {
+        if (i_count > max_value) break;
+
+        int num = c + (i_count << 2);
+        int __N = M[ num++ ];
+        int __O = M[ num++ ];
+        int __A = M[ num++ ];
+        int __B = M[ num++ ];
+
+        if (__N != 0) {
+            max_value = i_count + __N;
+            break;
+        }
+        if (__O == 0) {
+            max_value = i_count;
+            break;
+        }
+        if (__O >= 9) {
+            max_value = i_count - 1;
+            break;
+        }
+
+        char w = effW[ __O ] - 48;
+        char r = effR[ __O ] - 48;
+
+        for (j_count = 0; j_count < bcup_c; j_count++) {
+            int prev = bcupt[ j_count ];
+            if ((prev == __A && w) || (prev == __B && r)) {
+                max_value = i_count - 1;
+                goto END;
+            }
+        }
+
+        if (w) bcupt[ bcup_c++ ] = __A;
+    }
+
+END:
+    return max_value;
+}
+
 // error handling for unknown ops
 #define W 0
 
-// clang-format off
 #define J while
-#define S 1<<20
 #define H !K--
-m[S]={0},c,N,Q,E;
-ppu(){E=1;_Pragma("omp parallel")J(E){_Pragma("omp single")N=m[m[0]],c=m[0],m[0]+=++N*4;int i;_Pragma("omp for")for(i=0;i<N;i++){int t=c+i*4,Y=m[t++],K=m[t++],A=m[t++],B=m[t++];H?E=0:H?:H?m[A]=m[B]:H?m[A]=B:H?m[A]+=m[B]:H?m[A]+=m[B]:H?m[A]-=m[B]?H:m[Q]?:(m[A]=m[B]):W;Q=A;}}}
+ppu() {
+    E = 1;
+    J(E) {
+        _Pragma("omp single") N = m[ m[ 0 ] ], c = m[ 0 ], N ?: BC, m[ 0 ] += ++N * 4;
+        int i;
+        _Pragma("omp for") for (i = 0; i < N; i++) {
+            int t = c + i * 4, Y = m[ t++ ], K = m[ t++ ], A = m[ t++ ], B = m[ t++ ];
+            H?E=0:H?:H?m[A]=m[B]:H?m[A]=B:H?m[A]+=m[B]:H?m[A]+=m[B]:H?m[A]-=m[B]?H:m[Q]?:(m[A]=m[B]):W;
+            Q = A;
+        }
+    }
+}
+// clang-format off
 
 #define X J(isspace(*I))I++
 char*t="halt\0\0nop\0\0mov\0\2movi\0\2add\0\2addi\0\2sub\0\2subi\0\2moveq\0\2\1";*D,Z;
 char*pas(char*I){J(*I){X;if(*I==64)Z=strtol(++I,&I,10);X;char*O=t,F=0;J(*O!=1){int G=strlen(O),L=O[G+1],V=L,B=strncmp(I,O,G);F++,O+=G+2;if(B||!isspace(I[G]))continue;I+=G;*D++=Z,Z=0;*D++=F-1;J(V--){X;*D++=strtol(I,&I,10);}J(2-L++)*D++=0;goto N;}return I;N:;}return 0;}
 // clang-format on
 
+string read_file(string path, size_t *out_size) {
+    FILE  *f = fopen(path, "rb");
+    string buf;
+    size_t size;
+    if (!f) return NULL;
+    fseek(f, 0, SEEK_END);
+    size = ftell(f);
+    fseek(f, 0, SEEK_SET);
+    buf = malloc(size + 1);
+    if (!buf) {
+        fclose(f);
+        return NULL;
+    }
+    if (fread(buf, 1, size, f) != size) {
+        free(buf);
+        fclose(f);
+        return NULL;
+    }
+    buf[ size ] = '\0';
+    fclose(f);
+    if (out_size) *out_size = size;
+    return buf;
+}
+
+unsigned long long rdtsc(void) {
+    unsigned hi, lo;
+    __asm__ __volatile__("rdtsc" : "=a"(lo), "=d"(hi));
+    return ((unsigned long long) hi << 32) | lo;
+}
+
 main() {
-    D = &m[ 1 ];
-    pas("@4 movi 10 2");
+    D      = &m[ 1000 ];
+    m[ 0 ] = 1000;
+    size_t o_size;
+    string output = read_file("code.p2p", &o_size);
+    pas(output);
+    free(output);
 
     // int C;
-    // for (C = 0; C < 16; C++) printf("%i ", m[ C + 1 ]);
-    // fflush(stdout);
-
-    int x[] = { 1, 
-                3, 3, 5, 1, 
-                0, 3, 5, 2, 
-                0, 3, 5, 3, 
-                0, 3, 5, 4, 
-                0, 0, 0, 0 };
-    memcpy(m, x, sizeof(x));
-    ppu();
-    printf("result: %i\n", m[ 5 ]);
+    // for (C = 0; C < 16; C++) printf("%i ", m[ 1000 + C ]);
+    // putchar('\n');
+
+    // int x[] = { 1, 3, 3, 5, 1, 0, 3, 5, 2, 0, 3, 5, 3, 0, 3, 5, 4, 0, 0, 0, 0 };
+    // memcpy(m, x, sizeof(x));
+
+    _Pragma("omp parallel") {
+        _Pragma("omp single") {
+            clock_t start = clock();
+            ppu();
+            clock_t end = clock();
+
+            double seconds = (double) (end - start) / CLOCKS_PER_SEC;
+            printf("time: %.6fs, insts: %i\n", seconds, m[ 0 ] / 4);
+            double insts_per_sec = ((double) m[ 0 ] / 4) / seconds;
+            printf("ran at %f million instructions/second\n", insts_per_sec / 1e6);
+        }
+    }
+
+    printf("result: %i\n\n", m[ 1 ]);
 }
\ No newline at end of file
-- 
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