From 28ad019d62583b7e89b4e76922aa73857d5876eb Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Tue, 28 May 2024 15:42:26 +0200
Subject: Added roadmap for refactor and some simple routines

---
 src/cube.c          |  6 ++----
 src/cube_avx2.h     | 25 ++++++++++++++++++++++++-
 src/cube_portable.h | 22 +++++++++++++++++++++-
 src/cube_routines.h | 41 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 88 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/cube.c b/src/cube.c
index e1a53e5..df48d7e 100644
--- a/src/cube.c
+++ b/src/cube.c
@@ -9,10 +9,8 @@
 #define DBG_LOG(...) fprintf(stderr, __VA_ARGS__)
 #define DBG_WARN(condition, ...) if (!(condition)) DBG_LOG(__VA_ARGS__);
 #define DBG_ASSERT(condition, retval, ...) \
-	if (!(condition)) {                \
-		DBG_LOG(__VA_ARGS__);      \
-		return retval;             \
-	}
+    if (!(condition)) { DBG_LOG(__VA_ARGS__); return retval; }
+
 #else
 #define _static static
 #define _static_inline static inline
diff --git a/src/cube_avx2.h b/src/cube_avx2.h
index 233afed..f3fe731 100644
--- a/src/cube_avx2.h
+++ b/src/cube_avx2.h
@@ -14,6 +14,8 @@ _static_inline cube_fast_t fastcube(
     uint8_t, uint8_t, uint8_t, uint8_t, uint8_t,
     uint8_t, uint8_t, uint8_t, uint8_t, uint8_t
 );
+_static uint8_t corner(cube_fast_t, int);
+_static uint8_t edge(cube_fast_t, int);
 _static cube_fast_t cubetofast(cube_t);
 _static cube_t fasttocube(cube_fast_t);
 _static_inline bool equal_fast(cube_fast_t, cube_fast_t);
@@ -68,6 +70,28 @@ fastcube(
 	);
 }
 
+_static uint8_t
+corner(cube_fast_t c, int i)
+{
+	uint8_t aux[32];
+
+	DBG_ASSERT(i >= 0 && i < 8, 255, "Corner must be between 0 and 7\n");
+	_mm256_storeu_si256((__m256i_u *)aux, c);
+
+	return aux[i];
+}
+
+_static uint8_t
+edge(cube_fast_t c, int i)
+{
+	uint8_t aux[32];
+
+	DBG_ASSERT(i >= 0 && i < 12, 255, "Edge must be between 0 and 11\n");
+	_mm256_storeu_si256((__m256i_u *)aux, c);
+
+	return aux[i+16];
+}
+
 _static cube_fast_t
 cubetofast(cube_t a)
 {
@@ -338,4 +362,3 @@ invcoord_fast_esep(int64_t esep)
 
 	return ret;
 }
-
diff --git a/src/cube_portable.h b/src/cube_portable.h
index 2999d8a..48885ff 100644
--- a/src/cube_portable.h
+++ b/src/cube_portable.h
@@ -1,4 +1,7 @@
-typedef cube_t cube_fast_t;
+typedef struct {
+	uint8_t corner[8];
+	uint8_t edge[12];
+}  cube_fast_t;
 
 _static_inline cube_fast_t fastcube(
     uint8_t, uint8_t, uint8_t, uint8_t, uint8_t,
@@ -6,6 +9,8 @@ _static_inline cube_fast_t fastcube(
     uint8_t, uint8_t, uint8_t, uint8_t, uint8_t,
     uint8_t, uint8_t, uint8_t, uint8_t, uint8_t
 );
+_static uint8_t corner(cube_fast_t, int);
+_static uint8_t edge(cube_fast_t, int);
 _static cube_fast_t cubetofast(cube_t);
 _static cube_t fasttocube(cube_fast_t);
 _static_inline bool equal_fast(cube_fast_t, cube_fast_t);
@@ -66,6 +71,21 @@ fastcube(
 	return cube;
 }
 
+_static uint8_t
+corner(cube_fast_t c, int i)
+{
+	DBG_ASSERT(i >= 0 && i < 8, 255, "Corner must be between 0 and 7\n");
+
+	return c.corner[i];
+}
+_static uint8_t
+edge(cube_fast_t c, int i)
+{
+	DBG_ASSERT(i >= 0 && i < 12, 255, "Edge must be between 0 and 11\n");
+
+	return c.edge[i];
+}
+
 _static cube_fast_t
 cubetofast(cube_t cube)
 {
diff --git a/src/cube_routines.h b/src/cube_routines.h
index fb19355..3730e90 100644
--- a/src/cube_routines.h
+++ b/src/cube_routines.h
@@ -12,6 +12,10 @@ _static cube_t readcube_LST(const char *);
 _static int writepiece_LST(uint8_t, char *);
 _static void writecube_H48(cube_t, char *);
 _static void writecube_LST(cube_t, char *);
+_static uint8_t b32toedge(char);
+_static uint8_t b32tocorner(char);
+_static char edgetob32(uint8_t);
+_static char cornertob32(uint8_t);
 _static uint8_t readmove(char);
 _static uint8_t readmodifier(char);
 _static uint8_t readtrans(const char *);
@@ -493,6 +497,43 @@ writecube_LST(cube_t cube, char *buf)
 	*(buf+ptr-2) = 0;
 }
 
+_static uint8_t
+b32toedge(char c)
+{
+	DBG_ASSERT((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'g'), 255,
+	    "Error reading base32 piece");
+
+	return c <= 'Z' ? (uint8_t)(c - 'A') : (uint8_t)(c - 'a');
+}
+
+_static uint8_t
+b32tocorner(char c) {
+	uint8_t val;
+
+	DBG_ASSERT((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'g'), 255,
+	    "Error reading base32 piece");
+
+	val = c <= 'Z' ? (uint8_t)(c - 'A') : (uint8_t)(c - 'a') + 26;
+
+	return (val & 7) | ((val & 24) << 2);
+}
+
+_static char
+edgetob32(uint8_t edge)
+{
+	return edge <= 26 ? 'A' + (char)edge : 'a' + (char)(edge - 26);
+}
+
+_static char
+cornertob32(uint8_t corner)
+{
+	uint8_t val;
+
+	val = (corner & 7) | ((corner & 96) >> 2);
+
+	return val <= 26 ? 'A' + (char)val : 'a' + (char)(val - 26);
+}
+
 _static uint8_t
 readmove(char c)
 {
-- 
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