From 4d84f6aabdb5b962a990486b588fee3d1919adde Mon Sep 17 00:00:00 2001
From: Paweł Redman <pawel.redman@gmail.com>
Date: Tue, 25 Sep 2018 23:51:40 +0200
Subject: An exercise in futility.

---
 Makefile     | 1 +
 src/main.c   | 4 +++-
 src/mastur.c | 7 +++++++
 3 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 src/mastur.c

diff --git a/Makefile b/Makefile
index 3d16add..f069ef2 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,7 @@ SRC := src/bigtab.c \
        src/new32.c \
        src/new32v2.c \
        src/new32v3.c \
+       src/mastur.c \
        src/null.c \
        src/ref.c
        
diff --git a/src/main.c b/src/main.c
index ca3efc8..6651ff3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -21,6 +21,7 @@ int new(int i, int x, int y);
 int new32(int i, int x, int y);
 int new32v2(int i, int x, int y);
 int new32v3(int i, int x, int y);
+int mastur(int i, int x, int y);
 void bigtab_init(void);
 int bigtab(int i, int x, int y);
 
@@ -40,7 +41,8 @@ static struct solfunc solfuncs[ ] = {
 	{"new", new},
 	{"new32", new32},
 	{"new32v2", new32v2},
-	{"new32v3", new32v3}
+	{"new32v3", new32v3},
+	{"mastur", mastur}
 };
 
 #define PASSES 5
diff --git a/src/mastur.c b/src/mastur.c
new file mode 100644
index 0000000..7826b05
--- /dev/null
+++ b/src/mastur.c
@@ -0,0 +1,7 @@
+static const int A[] = {0, 1, -1};
+static const int C[][3] = {{1, 1, -2}, {1, 1, -2}, {-2, 1, 1}};
+
+int mastur(const int i, const int x, const int y)
+{
+	return i + A[x] * C[x][i / y % 3] * y;
+}
-- 
cgit