From 5e741a00a1350477c7d8778cb466c8efa27b152d Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Thu, 17 Jul 2025 07:57:18 +0200
Subject: Working drslice (same results as nissy-classic)

---
 src/arch/arch.h                    |  3 +++
 src/arch/coordinates_unoptimized.h | 55 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 src/arch/coordinates_unoptimized.h

(limited to 'src/arch')

diff --git a/src/arch/arch.h b/src/arch/arch.h
index a9f6e03..2c418a6 100644
--- a/src/arch/arch.h
+++ b/src/arch/arch.h
@@ -7,6 +7,7 @@ typedef __m256i cube_t;
 #if !defined(TEST_H)
 #include "common.h"
 #include "avx2.h"
+#include "coordinates_unoptimized.h"
 #endif
 
 #elif defined(NEON)
@@ -22,6 +23,7 @@ typedef struct {
 #if !defined(TEST_H)
 #include "common.h"
 #include "neon.h"
+#include "coordinates_unoptimized.h"
 #endif
 
 #else
@@ -36,6 +38,7 @@ typedef struct {
 #if !defined(TEST_H)
 #include "common.h"
 #include "portable.h"
+#include "coordinates_unoptimized.h"
 #endif
 
 #endif
diff --git a/src/arch/coordinates_unoptimized.h b/src/arch/coordinates_unoptimized.h
new file mode 100644
index 0000000..c553b2b
--- /dev/null
+++ b/src/arch/coordinates_unoptimized.h
@@ -0,0 +1,55 @@
+STATIC_INLINE int64_t coord_cp(cube_t);
+STATIC_INLINE cube_t invcoord_cp(int64_t);
+STATIC_INLINE int64_t coord_epud(cube_t);
+STATIC_INLINE cube_t invcoord_epud(int64_t);
+
+STATIC_INLINE int64_t
+coord_cp(cube_t cube)
+{
+	int i;
+	uint8_t c[8], e[12];
+
+	pieces(&cube, c, e);
+	for (i = 0; i < 8; i++)
+		c[i] &= PBITS;
+
+	return permtoindex(8, c);
+}
+
+STATIC_INLINE cube_t
+invcoord_cp(int64_t i)
+{
+	uint8_t c[8];
+
+	indextoperm(i, 8, c);
+
+	return STATIC_CUBE(c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7],
+	    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11);
+}
+
+STATIC_INLINE int64_t
+coord_epud(cube_t cube)
+{
+	int i;
+	uint8_t c[8], e[12];
+
+	pieces(&cube, c, e);
+	DBG_ASSERT(isperm(8, e), -1,
+	    "Cannot compute epud coordinate: edges not separated");
+
+	for (i = 0; i < 8; i++)
+		e[i] &= PBITS;
+
+	return permtoindex(8, e);
+}
+
+STATIC_INLINE cube_t
+invcoord_epud(int64_t i)
+{
+	uint8_t e[8];
+
+	indextoperm(i, 8, e);
+
+	return STATIC_CUBE(0, 1, 2, 3, 4, 5, 6, 7,
+	    e[0], e[1], e[2], e[3], e[4], e[5], e[6], e[7], 8, 9, 10, 11);
+}
-- 
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