Merge the "solver-experiments" branch that I have been working on for

a few weeks. This include mainly three things:

1. Various tweaks for a total performance gain of around 30%.
2. Take into account symmetries and avoid repeated work. This
   required a re-work of the splitting into tasks before the solve.
3. Add a second fallback table (eoesep). This gives huge performance
   gains for particular scrambles (e.g. superflip).

After merging this commit, remove and re-generate all pruning tables.

Squashed commit of the following:

commit 60f0705d2d69050e6a30581a2810f686d6f69b80
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Dec 7 16:06:48 2024 +0100

    Fix indentation

commit cc5d489a251812b6188c0ba264ac6cb2236f1afe
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Dec 7 15:56:19 2024 +0100

    Updated documentation

commit a3f605dd628546e52564f82b139feb473b0725f3
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Dec 7 14:01:11 2024 +0100

    use eoesep table as second fallback

commit c75e43c9116c64f97e92b0fe038be8a032925a72
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Dec 6 16:13:23 2024 +0100

    First commit for gendata_eoesep

commit fea7688ab8bdc5ae0c3480622e2510a3bcd39248
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Dec 3 17:31:00 2024 +0100

    Add scramble to tool

commit 66866cb71dea4ca8278ecb9e90ff4295771feb42
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Dec 3 17:22:59 2024 +0100

    Added tool to check multiple solutions

commit ef65611c772c3996bddca8d181da3538e0af1674
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Dec 3 17:16:20 2024 +0100

    Write all solutions for symmetric positions

commit e3ded26db7d7d4ae7c0e2488151ed14f581f7b8e
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Nov 26 09:14:54 2024 +0100

    Added symmetry filter (TODO: print excluded solutions)

commit 864c437a9751c58d58562650ca9eba4a9e6ad3eb
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Mon Nov 25 14:51:13 2024 +0100

    Improved task split

commit b88926d36d7ab0c64c5fe3bb954fd15d41267fba
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Nov 22 19:06:41 2024 +0100

    Reworked tasks for multi-threading in view of symmetry filter

commit 26fa653f97df8cd601aecb80eaf89f0a00e9ba9f
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 15:37:43 2024 +0100

    Added transform move

commit 19f655ef94d658eaa2fefb5cea3c167a3ec58db6
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 09:29:15 2024 +0100

    Clarified doc

commit 3b0fe1e5ef8b628854e30f0f0067300e2763c954
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 08:36:58 2024 +0100

    Handle solved cube correctly

commit 57705cbc4982e3abe97a36ed64871738d4f721c0
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 08:24:30 2024 +0100

    Close file

commit fc7d462b58bcf3d3a3fbf26c1f3bd04c640a4898
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 15:05:48 2024 +0100

    Removed stats tool

commit 359bf7cb49ef405ee76ed662207d47cb2abcc5a9
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 15:01:51 2024 +0100

    Updated theory doc

commit 39c315af562bc4ce896f41004388a4c34d475d37
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 14:51:40 2024 +0100

    Remove unused constants

commit 57a5d24538aa59a4df9221dad2f99e9f0286bd9d
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 10:20:38 2024 +0100

    Add tool to solve scrambles from file

commit 07e2918c216636891b1fa6adecc9756086a901e9
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Mon Oct 28 17:00:00 2024 +0100

    Add make table to tool

commit f5e5266c654eb027a5a35c57cc618555246f5e5e
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Mon Oct 28 09:35:49 2024 +0100

    Remove old solver, other small things

commit a1ec78025b7959dbb845213f7f4e6851ecebc204
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sun Oct 27 02:00:29 2024 +0200

    Improvements

commit 8eea23dbe888d923e662e24ae969130e2c67b999
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Oct 26 12:24:19 2024 +0200

    Makefile fix

commit 3fc3927beacc78971cefeb42da8d71fe6c015fc1
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Oct 25 18:25:09 2024 +0200

    More performance gains

commit 7b4efa1f9af9722de1ab9ccfc27899825a0d12c4
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Oct 25 15:53:20 2024 +0200

    Alternative solver implementation, small performance gain

1 files changed, 12 insertions, 22 deletions

diff --git a/src/solvers/h48/gendata_cocsep.h b/src/solvers/h48/gendata_cocsep.h
index b46bcf3..291ae48 100644
--- a/src/solvers/h48/gendata_cocsep.h
+++ b/src/solvers/h48/gendata_cocsep.h
@@ -1,27 +1,16 @@
-STATIC_INLINE bool get_visited(const uint8_t *, int64_t);
-STATIC_INLINE void set_visited(uint8_t *, int64_t);
+STATIC_INLINE bool gendata_cocsep_get_visited(const uint8_t *, int64_t);
+STATIC_INLINE void gendata_cocsep_set_visited(uint8_t *, int64_t);
 
 STATIC size_t gendata_cocsep(
-    char [static COCSEP_FULLSIZE+INFOSIZE], uint64_t *, cube_t *);
+    char [static COCSEP_FULLSIZE], uint64_t *, cube_t *);
 STATIC uint32_t gendata_cocsep_dfs(cocsep_dfs_arg_t *);
 STATIC void getdistribution_cocsep(const uint32_t *, uint64_t [static 21]);
 
 STATIC_INLINE int8_t get_h48_cdata(cube_t, const uint32_t *, uint32_t *);
 
-/*
-Each element of the cocsep table is a uint32_t used as follows:
-  - Lowest 8-bit block: pruning value
-  - Second-lowest 8-bit block: "ttrep" (transformation to representative)
-  - Top 16-bit block: symcoord value
-After the data as described above, more auxiliary information is appended:
-  - A uint32_t representing the number of symmetry classes
-  - A uint32_t representing the highest value of the pruning table
-  - One uint32_t for each "line" of the pruning table, representing the number
-    of positions having that pruning value.
-*/
 STATIC size_t
 gendata_cocsep(
-        char buf[static COCSEP_FULLSIZE+INFOSIZE],
+        char buf[static COCSEP_FULLSIZE],
         uint64_t *selfsim,
         cube_t *rep
 )
@@ -36,7 +25,7 @@ gendata_cocsep(
                 goto gendata_cocsep_return_size;
 
         memset(buf, 0xFF, COCSEP_FULLSIZE);
-        buf32 = (uint32_t *)((char *)buf + INFOSIZE);
+        buf32 = (uint32_t *)(buf + INFOSIZE);
         if (selfsim != NULL)
                 memset(selfsim, 0, sizeof(uint64_t) * COCSEP_CLASSES);
 
@@ -69,7 +58,7 @@ gendata_cocsep(
                 info.distribution[i] = cc;
         }
 
-        writetableinfo(&info, COCSEP_FULLSIZE+INFOSIZE, buf);
+        writetableinfo(&info, COCSEP_FULLSIZE, buf);
 
         DBG_ASSERT(n == COCSEP_CLASSES, 0,
             "cocsep: computed %" PRIu16 " symmetry classes, "
@@ -101,9 +90,10 @@ gendata_cocsep_dfs(cocsep_dfs_arg_t *arg)
 
         i = coord_cocsep(arg->cube);
         olddepth = (uint8_t)(arg->buf32[i] & 0xFF);
-        if (olddepth < arg->depth || get_visited(arg->visited, i))
+        if (olddepth < arg->depth ||
+            gendata_cocsep_get_visited(arg->visited, i))
                 return 0;
-        set_visited(arg->visited, i);
+        gendata_cocsep_set_visited(arg->visited, i);
 
         if (arg->depth == arg->maxdepth) {
                 if ((arg->buf32[i] & 0xFF) != 0xFF)
@@ -118,7 +108,7 @@ gendata_cocsep_dfs(cocsep_dfs_arg_t *arg)
                                 arg->selfsim[*arg->n] |= UINT64_C(1) << t;
                         if (COCLASS(arg->buf32[j]) != UINT32_C(0xFFFF))
                                 continue;
-                        set_visited(arg->visited, j);
+                        gendata_cocsep_set_visited(arg->visited, j);
                         tinv = inverse_trans(t);
                         olddepth = arg->buf32[j] & 0xFF;
                         cc += olddepth == 0xFF;
@@ -155,13 +145,13 @@ getdistribution_cocsep(const uint32_t *table, uint64_t distr[static 21])
 }
 
 STATIC_INLINE bool
-get_visited(const uint8_t *a, int64_t i)
+gendata_cocsep_get_visited(const uint8_t *a, int64_t i)
 {
         return a[VISITED_IND(i)] & VISITED_MASK(i);
 }
 
 STATIC_INLINE void
-set_visited(uint8_t *a, int64_t i)
+gendata_cocsep_set_visited(uint8_t *a, int64_t i)
 {
         a[VISITED_IND(i)] |= VISITED_MASK(i);
 }