Base our advmame scalers on the official Scale2x source - this way we can easily update to new version and benefit from their optimizations (e.g. MMX support)

svn-id: r14502

1 files changed, 52 insertions, 0 deletions

diff --git a/common/scaler/scale2x.h b/common/scaler/scale2x.h
new file mode 100644
index 0000000000..54bfac5b8f
--- /dev/null
+++ b/common/scaler/scale2x.h
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the Scale2x project.
+ *
+ * Copyright (C) 2001, 2002, 2003, 2004 Andrea Mazzoleni
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __SCALE2X_H
+#define __SCALE2X_H
+
+typedef unsigned char scale2x_uint8;
+typedef unsigned short scale2x_uint16;
+typedef unsigned scale2x_uint32;
+
+void scale2x_8_def(scale2x_uint8* dst0, scale2x_uint8* dst1, const scale2x_uint8* src0, const scale2x_uint8* src1, const scale2x_uint8* src2, unsigned count);
+void scale2x_16_def(scale2x_uint16* dst0, scale2x_uint16* dst1, const scale2x_uint16* src0, const scale2x_uint16* src1, const scale2x_uint16* src2, unsigned count);
+void scale2x_32_def(scale2x_uint32* dst0, scale2x_uint32* dst1, const scale2x_uint32* src0, const scale2x_uint32* src1, const scale2x_uint32* src2, unsigned count);
+
+#if defined(__GNUC__) && defined(__i386__)
+
+void scale2x_8_mmx(scale2x_uint8* dst0, scale2x_uint8* dst1, const scale2x_uint8* src0, const scale2x_uint8* src1, const scale2x_uint8* src2, unsigned count);
+void scale2x_16_mmx(scale2x_uint16* dst0, scale2x_uint16* dst1, const scale2x_uint16* src0, const scale2x_uint16* src1, const scale2x_uint16* src2, unsigned count);
+void scale2x_32_mmx(scale2x_uint32* dst0, scale2x_uint32* dst1, const scale2x_uint32* src0, const scale2x_uint32* src1, const scale2x_uint32* src2, unsigned count);
+
+/**
+ * End the use of the MMX instructions.
+ * This function must be called before using any floating-point operations.
+ */
+static inline void scale2x_mmx_emms(void)
+{
+	__asm__ __volatile__ (
+		"emms"
+	);
+}
+
+#endif
+
+#endif
+