From 19a36e120f5628bc92ae7704d6f32d0b9b267922 Mon Sep 17 00:00:00 2001
From: Zander Thannhauser <zthannhauser@gmail.com>
Date: Tue, 5 Aug 2025 12:03:02 -0500
Subject: [PATCH] needs more ram

---
 flake.nix |   1 +
 main.c    | 329 ++++++++++++++++++++++++++++++------------------------
 2 files changed, 184 insertions(+), 146 deletions(-)

diff --git a/flake.nix b/flake.nix
index 3ae0072..89ce552 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,6 +28,7 @@
               gnumake
               readline.dev
               python3
+              valgrind
             ];
           };
           packages.default = pkgs.stdenv.mkDerivation rec {
diff --git a/main.c b/main.c
index 18626ca..66efd1e 100644
--- a/main.c
+++ b/main.c
@@ -189,19 +189,24 @@ static void parse_args(int argc, char* const* argv)
     }
 }
 
-#define W 0b0101010101010101
-#define X 0b0011001100110011
-#define Y 0b0000111100001111
-#define Z 0b0000000011111111
-#define M 0b1111111111111111
+#define V 0b01010101010101010101010101010101
+#define W 0b00110011001100110011001100110011
+#define X 0b00001111000011110000111100001111
+#define Y 0b00000000111111110000000011111111
+#define Z 0b00000000000000001111111111111111
+#define M 0b11111111111111111111111111111111
 
-#define N (65536)
+#define N (1UL << (1UL << 5UL))
+
+#define NN (65536)
 
 enum kind {
     ek_unreachable,
 
     ek_0,
     ek_1,
+
+    ek_V,
     ek_W,
     ek_X,
     ek_Y,
@@ -231,13 +236,15 @@ enum kind {
 struct expr {
     enum kind kind;
 
-    uint16_t cond, left, right;
+    uint32_t cond, left, right;
 
     int cost;
 } lookup[N];
 
-static void print(uint16_t truthtable, int depth)
+static void print(uint32_t truthtable, int depth)
 {
+    assert(!"TODO");
+    #if 0
     #define LITERAL_ESCAPE "\e[38;2;200;200;100m"
     #define VARIABLE_ESCAPE "\e[38;2;100;100;200m"
     #define RESET_ESCAPE "\e[0m"
@@ -378,79 +385,102 @@ static void print(uint16_t truthtable, int depth)
             break;
         }
     }
+    #endif
 }
 
+
+// heap of truthtables; key = cost
+struct todo {
+    uint32_t data[N];
+    uint32_t n;
+
+    // truthtable -> index in 'todo'
+    uint32_t reverse[N];
+} *todo;
+
+// create a list of the "done" truthtables
+struct done {
+    uint64_t headtails[N], next[N], head;
+} *done;
+
 void calculate_simplifications(void)
 {
     // init 'lookup':
+    for (uint64_t i = 0; i < N; i++)
     {
-        for (int i = 0; i < N; i++)
+        if (i % 42949672 == 0)
         {
-            lookup[i].kind = ek_unreachable;
-
-            lookup[i].cost = INT_MAX;
+            printf("init lookup: %.2f%%\n", (double) i * 100 / N);
         }
+
+        lookup[i].kind = ek_unreachable;
+
+        lookup[i].cost = INT_MAX;
     }
 
-    // heap of truthtables; key = cost
-    struct {
-        uint16_t data[N];
-        int n;
-
-        // truthtable -> index in 'todo'
-        int reverse[N];
-    } todo;
-
     // init 'todo':
     {
-        todo.n = 0;
+        todo->n = 0;
 
-        for (int i = 0; i < N; i++)
+        for (uint64_t i = 0; i < N; i++)
         {
-            todo.reverse[i] = -1;
+            if (i % 42949672 == 0)
+            {
+                printf("init todo: %.2f%%\n", (double) i * 100 / N);
+            }
+
+            todo->reverse[i] = (uint32_t) -1;
         }
     }
 
-    uint16_t pop(void)
+    uint32_t pop(void)
     {
-        assert(todo.n > 0);
+        printf("  pop()\n");
 
-        uint16_t retval = todo.data[0];
+        assert(todo->n > 0);
 
-        todo.reverse[retval] = -1;
+        uint32_t retval = todo->data[0];
 
-        uint16_t moving = todo.data[todo.n-- - 1];
+        todo->reverse[retval] = (uint32_t) -1;
+
+        uint32_t moving = todo->data[todo->n-- - 1];
 
         int cost = lookup[moving].cost;
 
-        int index = 0;
+        uint64_t index = 0;
 
         again:
         {
-            int left = index * 2 + 1;
-            int right = index * 2 + 2;
+            printf("    index = %lu\n", index);
 
-            uint16_t smallest = moving;
+            uint64_t left = index * 2 + 1;
+            uint64_t right = index * 2 + 2;
 
-            if (left < todo.n && lookup[todo.data[left]].cost < cost)
-                smallest = todo.data[left];
+            uint32_t smallest = moving;
 
-            if (right < todo.n && lookup[todo.data[right]].cost < lookup[smallest].cost)
-                smallest = todo.data[right];
+            if (left < todo->n && lookup[todo->data[left]].cost < cost)
+                smallest = todo->data[left];
+
+            if (right < todo->n && lookup[todo->data[right]].cost < lookup[smallest].cost)
+                smallest = todo->data[right];
 
             if (smallest == moving)
             {
-                todo.data[index] = moving;
+                todo->data[index] = moving;
 
-                todo.reverse[moving] = index;
+                assert(index < 4294967296);
+
+                todo->reverse[moving] = (uint32_t) index;
             }
             else
             {
-                int new = todo.reverse[smallest];
+                uint32_t new = todo->reverse[smallest];
 
-                todo.data[index] = smallest;
+                todo->data[index] = smallest;
 
-                todo.reverse[smallest] = index;
+                assert(index < 4294967296);
+
+                todo->reverse[smallest] = (uint32_t) index;
 
                 index = new;
 
@@ -458,156 +488,163 @@ void calculate_simplifications(void)
             }
         }
 
+        printf("    return 0b%032b\n", retval);
+
         return retval;
     }
 
-    void append(uint16_t truthtable, int cost)
+    void append(uint32_t truthtable, int cost)
     {
-        assert(todo.reverse[truthtable] == -1);
+        printf("append(truthtable = 0b%032b, cost = %i)\n", truthtable, cost);
 
-        int index = todo.n++, new_index;
+        assert(todo->reverse[truthtable] == (uint32_t) -1);
 
-        while (index > 0 && lookup[todo.data[new_index = (index - 1) / 2]].cost > cost)
+        assert(todo->n < N);
+
+        uint32_t index = (uint32_t) todo->n++, new_index;
+        printf("  index = %i\n", index);
+
+        while (index > 0 && lookup[todo->data[new_index = (index - 1) / 2]].cost > cost)
         {
-            todo.data[index] = todo.data[new_index];
+            todo->data[index] = todo->data[new_index];
 
-            todo.reverse[todo.data[new_index]] = index;
+            todo->reverse[todo->data[new_index]] = index;
 
             index = new_index;
+            printf("  index = %i\n", index);
         }
 
-        todo.data[index] = truthtable;
+        todo->data[index] = truthtable;
 
-        todo.reverse[truthtable] = index;
+        todo->reverse[truthtable] = index;
 
         lookup[truthtable].cost = cost;
     }
 
     void update(uint16_t truthtable, int cost)
     {
-        assert(todo.reverse[truthtable] != -1);
+        assert(!"TODO");
+        #if 0
+        assert(todo->reverse[truthtable] != -1);
 
         assert(cost < lookup[truthtable].cost);
 
-        int index =todo. reverse[truthtable], new_index;
+        int index =todo-> reverse[truthtable], new_index;
 
-        while (index > 0 && lookup[todo.data[new_index = (index - 1) / 2]].cost > cost)
+        while (index > 0 && lookup[todo->data[new_index = (index - 1) / 2]].cost > cost)
         {
-            todo.data[index] = todo.data[new_index];
+            todo->data[index] = todo->data[new_index];
 
-            todo.reverse[todo.data[new_index]] = index;
+            todo->reverse[todo->data[new_index]] = index;
 
             index = new_index;
         }
 
-        todo.data[index] = truthtable;
-        todo.reverse[truthtable] = index;
+        todo->data[index] = truthtable;
+        todo->reverse[truthtable] = index;
 
         lookup[truthtable].cost = cost;
-    }
-
-    // create a list of the "done" truthtables
-    struct {
-        int headtails[N], next[N], head;
-
-        // for debugging:
-        #if ZDEBUG
-        bool in[N];
         #endif
-    } done = {};
+    }
 
     // init 'done':
     {
-        done.head = -1;
+        done->head = (uint64_t) -1;
 
-        for (int i = 0; i < N; i++)
+        for (uint64_t i = 0; i < N; i++)
         {
-            done.headtails[i] = -1;
+            done->headtails[i] = (uint64_t) -1;
 
-            #if ZDEBUG
-            done.in[i] = false;
-            #endif
+            if (i % 42949672 == 0)
+            {
+                printf("init done: %.2f%%\n", (double) i * 100 / N);
+            }
         }
     }
 
-    void insert(int index)
+    void insert(uint32_t index)
     {
-        #if ZDEBUG
-        assert(!done.in[index]);
-        #endif
+        printf("  insert(0b%032b)\n", index);
 
-        int head = index & 1 ? index & ~(index & -index) : index, prevhead = -1;
+        assert(!"TODO");
+        #if 0
+        uint32_t head = index & 1 ? index & ~(index & -index) : index;
 
-        while (done.headtails[head] == -1 || index < done.headtails[head])
+        uint32_t prevhead = (uint32_t) -1;
+
+        while (false
+            || done->headtails[head] == (uint32_t) -1
+            || index < done->headtails[head])
         {
-            done.headtails[head] = index;
+            done->headtails[head] = index;
 
             prevhead = head, head = head & ~(head & -head);
         }
 
-        if (done.headtails[head] < index)
-        {
-            if (prevhead == -1)
-            {
-                assert(done.headtails[head] == head);
+        printf("     head = %lu\n", head);
 
-                done.next[head] = index;
+        if (done->headtails[head] < index)
+        {
+            if (prevhead == (uint32_t) -1)
+            {
+                assert(done->headtails[head] == head);
+
+                done->next[head] = index;
             }
             else
             {
-                int tophalftail = done.headtails[prevhead - 1];
+                uint32_t tophalftail = done->headtails[prevhead - 1];
 
-                assert(tophalftail != -1);
+                assert(tophalftail != (uint32_t) -1);
 
-                done.next[tophalftail] = index;
+                done->next[tophalftail] = index;
             }
         }
         else
         {
-            done.head = index;
+            done->head = index;
         }
 
-        int n = ~index & M;
-        int tail = index & 1 ? index : index | (n & -n), prevtail = -1;
+        uint32_t n = ~index & M;
+        uint32_t tail = index & 1 ? index : index | (n & -n);
+        uint32_t prevtail = (uint32_t) -1;
 
-        while (done.headtails[tail] == -1 || done.headtails[tail] < index)
+        while (false
+            || done->headtails[tail] == (uint32_t) -1
+            || done->headtails[tail] < index)
         {
-            done.headtails[tail] = index;
+            done->headtails[tail] = index;
 
             prevtail = tail, tail = tail | (n = ~tail & M, n & -n);
         }
 
-        if (index < done.headtails[tail])
+        printf("    tail = %lu\n", tail);
+
+        if (index < done->headtails[tail])
         {
-            if (prevtail == -1)
+            if (prevtail == (uint32_t) -1)
             {
-                assert(done.headtails[tail] == tail);
+                assert(done->headtails[tail] == tail);
 
-                #if ZDEBUG
-                assert(done.in[tail]);
-                #endif
-
-                done.next[index] = tail;
+                done->next[index] = tail;
             }
             else
             {
-                int bottomhalfhead = done.headtails[prevtail + 1];
+                int bottomhalfhead = done->headtails[prevtail + 1];
 
-                assert(bottomhalfhead != -1);
+                assert(bottomhalfhead != (uint32_t) -1);
 
-                done.next[index] = bottomhalfhead;
+                done->next[index] = bottomhalfhead;
             }
         }
         else
         {
-            done.next[index] = -1;
+            done->next[index] = (uint32_t) -1;
         }
-
-        #if ZDEBUG
-        done.in[index] = true;
         #endif
     }
 
+    append(V, 0), lookup[V].kind = ek_V;
     append(W, 0), lookup[W].kind = ek_W;
     append(X, 0), lookup[X].kind = ek_X;
     append(Y, 0), lookup[Y].kind = ek_Y;
@@ -616,38 +653,24 @@ void calculate_simplifications(void)
     append(0, 1), lookup[0].kind = ek_0;
     append(M, 1), lookup[M].kind = ek_1;
 
-    // disable terminal autowrap:
-    if (verbose && print_with_color)
+    for (uint64_t iterations = 1; iterations <= N; iterations++)
     {
-        printf("\e[?7l");
-    }
+        printf("iterations = %lu\n", iterations);
 
-    for (int iterations = 1; todo.n && iterations <= N; iterations++)
-    {
-        uint16_t truthtable = pop();
+        assert(todo->n);
+
+        uint32_t truthtable = pop();
 
         insert(truthtable);
 
         int cost = lookup[truthtable].cost;
+        printf("%lu of %lu (%.2f%%): [%i] ",
+            iterations, N, (100.0 * (double) iterations / N), cost);
 
-        if (verbose)
-        {
-            if (print_with_color)
-            {
-                printf("\e[2K");
-            }
-
-            printf("%i of %i (%.2f%%): [%i] ",
-                iterations, N, (100.0 * iterations / N), cost);
-
-            print(truthtable, 0), puts("");
-
-            if (print_with_color)
-            {
-                printf("\e[1A");
-            }
-        }
+        print(truthtable, 0), puts("");
 
+        assert(!"TODO");
+        #if 0
         // consider NOT:
         if (use_operators.not)
         {
@@ -657,7 +680,7 @@ void calculate_simplifications(void)
 
             if (not_cost < lookup[not_truthtable].cost)
             {
-                if (todo.reverse[not_truthtable] == -1)
+                if (todo->reverse[not_truthtable] == -1)
                 {
                     append(not_truthtable, not_cost);
                 }
@@ -673,7 +696,7 @@ void calculate_simplifications(void)
 
         #define BINARY_OPERATOR(ekind, function) \
         { \
-            for (int i = done.head; i != -1; i = done.next[i]) \
+            for (int i = done->head; i != -1; i = done->next[i]) \
             { \
                 { \
                     uint16_t bin_truthtable = function(truthtable, i) & M; \
@@ -682,7 +705,7 @@ void calculate_simplifications(void)
                      \
                     if (bin_cost < lookup[bin_truthtable].cost) \
                     { \
-                        if (todo.reverse[bin_truthtable] == -1) \
+                        if (todo->reverse[bin_truthtable] == -1) \
                             append(bin_truthtable, bin_cost); \
                         else \
                             update(bin_truthtable, bin_cost); \
@@ -700,7 +723,7 @@ void calculate_simplifications(void)
                      \
                     if (bin_cost < lookup[bin_truthtable].cost) \
                     { \
-                        if (todo.reverse[bin_truthtable] == -1) \
+                        if (todo->reverse[bin_truthtable] == -1) \
                             append(bin_truthtable, bin_cost); \
                         else \
                             update(bin_truthtable, bin_cost); \
@@ -790,9 +813,9 @@ void calculate_simplifications(void)
 
         if (use_operators.ternary)
         {
-            for (int i = done.head; i != -1; i = done.next[i])
+            for (int i = done->head; i != -1; i = done->next[i])
             {
-                for (int j = done.head; j != -1; j = done.next[j])
+                for (int j = done->head; j != -1; j = done->next[j])
                 {
                     int ternary_cost = 1 + cost + lookup[i].cost + lookup[j].cost;
 
@@ -803,7 +826,7 @@ void calculate_simplifications(void)
                         \
                         if (ternary_cost < lookup[ternary_truthtable].cost) \
                         { \
-                            if (todo.reverse[ternary_truthtable] == -1) \
+                            if (todo->reverse[ternary_truthtable] == -1) \
                             { \
                                 append(ternary_truthtable, ternary_cost); \
                             } \
@@ -825,17 +848,13 @@ void calculate_simplifications(void)
                 }
             }
         }
-    }
-
-    if (verbose && print_with_color)
-    {
-        printf("\e[2K" "\e[?7h");
+        #endif
     }
 }
 
 void get_simplifications(void)
 {
-    char path[PATH_MAX] = ".simplifier-cache-2";
+    char path[PATH_MAX] = ".simplifier-cache-5-var";
 
     if (use_operators.not)
         strcat(path, "-not");
@@ -948,6 +967,8 @@ void get_simplifications(void)
 
 uint16_t evaluate(const char* text)
 {
+    assert(!"TODO");
+    #if 0
     enum {
         tk_uninitialized,
 
@@ -1435,16 +1456,22 @@ uint16_t evaluate(const char* text)
     }
 
     return truthtable;
+    #endif
 }
 
 int main(int argc, char* const* argv)
 {
     parse_args(argc, argv);
 
+    todo = malloc(sizeof(*todo));
+    done = malloc(sizeof(*done));
+
     get_simplifications();
 
     if (print_all_and_quit)
     {
+        assert(!"TODO");
+        #if 0
         for (int i = 0; i < N; i++)
         {
             int cost = lookup[i].cost;
@@ -1454,9 +1481,12 @@ int main(int argc, char* const* argv)
                 printf("0b%016b: [%2i]: ", i, cost), print(i, 0), puts("");
             }
         }
+        #endif
     }
     else if (print_stats)
     {
+        assert(!"TODO");
+        #if 0
         printf("statistics:" "\n");
 
         uintmax_t total_cost = 0;
@@ -1509,9 +1539,12 @@ int main(int argc, char* const* argv)
         {
             puts("everything unreachable: no statistics to give");
         }
+        #endif
     }
     else if (command)
     {
+        assert(!"TODO");
+        #if 0
         uint16_t truthtable = evaluate(command);
 
         // printf("truthtable = 0b%016b\n", truthtable);
@@ -1524,9 +1557,12 @@ int main(int argc, char* const* argv)
         {
             printf("%2i: ", lookup[truthtable].cost), print(truthtable, 0), puts("");
         }
+        #endif
     }
     else
     {
+        assert(!"TODO");
+        #if 0
         if (!quiet)
         {
             puts("Use C-style syntax for boolean operators and expressions.");
@@ -1556,6 +1592,7 @@ int main(int argc, char* const* argv)
                     print(truthtable, 0), puts("");
             }
         }
+        #endif
     }
 
     return 0;