Importing libmpeg2 from mpeg2dec-0.3.1

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9858 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 119 insertions, 0 deletions

diff --git a/libmpeg2/cpu_state.c b/libmpeg2/cpu_state.c
new file mode 100644
index 0000000000..7ba5133679
--- /dev/null
+++ b/libmpeg2/cpu_state.c
@@ -0,0 +1,119 @@
+/*
+ * cpu_state.c
+ * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec 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.
+ *
+ * mpeg2dec 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <inttypes.h>
+
+#include "mpeg2.h"
+#include "mpeg2_internal.h"
+#include "attributes.h"
+#ifdef ARCH_X86
+#include "mmx.h"
+#endif
+
+void (* mpeg2_cpu_state_save) (cpu_state_t * state) = NULL;
+void (* mpeg2_cpu_state_restore) (cpu_state_t * state) = NULL;
+
+#ifdef ARCH_X86
+static void state_restore_mmx (cpu_state_t * state)
+{
+    emms ();
+}
+#endif
+
+#ifdef ARCH_PPC
+static void state_save_altivec (cpu_state_t * state)
+{
+    asm ("						\n"
+	"	li		%r9,  16		\n"
+	"	stvx		%v20, 0,    %r3		\n"
+	"	li		%r11, 32		\n"
+	"	stvx		%v21, %r9,  %r3		\n"
+	"	li		%r9,  48		\n"
+	"	stvx		%v22, %r11, %r3		\n"
+	"	li		%r11, 64		\n"
+	"	stvx		%v23, %r9,  %r3		\n"
+	"	li		%r9,  80		\n"
+	"	stvx		%v24, %r11, %r3		\n"
+	"	li		%r11, 96		\n"
+	"	stvx		%v25, %r9,  %r3		\n"
+	"	li		%r9,  112		\n"
+	"	stvx		%v26, %r11, %r3		\n"
+	"	li		%r11, 128		\n"
+	"	stvx		%v27, %r9,  %r3		\n"
+	"	li		%r9,  144		\n"
+	"	stvx		%v28, %r11, %r3		\n"
+	"	li		%r11, 160		\n"
+	"	stvx		%v29, %r9,  %r3		\n"
+	"	li		%r9,  176		\n"
+	"	stvx		%v30, %r11, %r3		\n"
+	"	stvx		%v31, %r9,  %r3		\n"
+	 );
+}
+
+static void state_restore_altivec (cpu_state_t * state)
+{
+    asm ("						\n"
+	"	li		%r9,  16		\n"
+	"	lvx		%v20, 0,    %r3		\n"
+	"	li		%r11, 32		\n"
+	"	lvx		%v21, %r9,  %r3		\n"
+	"	li		%r9,  48		\n"
+	"	lvx		%v22, %r11, %r3		\n"
+	"	li		%r11, 64		\n"
+	"	lvx		%v23, %r9,  %r3		\n"
+	"	li		%r9,  80		\n"
+	"	lvx		%v24, %r11, %r3		\n"
+	"	li		%r11, 96		\n"
+	"	lvx		%v25, %r9,  %r3		\n"
+	"	li		%r9,  112		\n"
+	"	lvx		%v26, %r11, %r3		\n"
+	"	li		%r11, 128		\n"
+	"	lvx		%v27, %r9,  %r3		\n"
+	"	li		%r9,  144		\n"
+	"	lvx		%v28, %r11, %r3		\n"
+	"	li		%r11, 160		\n"
+	"	lvx		%v29, %r9,  %r3		\n"
+	"	li		%r9,  176		\n"
+	"	lvx		%v30, %r11, %r3		\n"
+	"	lvx		%v31, %r9,  %r3		\n"
+	 );
+}
+#endif
+
+void mpeg2_cpu_state_init (uint32_t accel)
+{
+#ifdef ARCH_X86
+    if (accel & MPEG2_ACCEL_X86_MMX) {
+	mpeg2_cpu_state_restore = state_restore_mmx;
+    }
+#endif
+#ifdef ARCH_PPC
+    if (accel & MPEG2_ACCEL_PPC_ALTIVEC) {
+	mpeg2_cpu_state_save = state_save_altivec;
+	mpeg2_cpu_state_restore = state_restore_altivec;
+    }
+#endif
+}