mips: port optimizations to mips n64

This mainly consists of replacing all the pointer arithmatic 'addiu'
instructions with PTR_ADDIU which will handle the differences in pointer
sizes when compiled on 64 bit mips systems.

The header asmdefs.h contains the PTR_ macros which expend to the correct mips
instructions to manipulate registers containing pointers.

Signed-off-by: James Cowgill <james410@cowgill.org.uk>
Reviewed-by: Nedeljko Babic <Nedeljko.Babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 48 insertions, 0 deletions

diff --git a/libavutil/mips/asmdefs.h b/libavutil/mips/asmdefs.h
new file mode 100644
index 0000000000..4d2922c951
--- /dev/null
+++ b/libavutil/mips/asmdefs.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2015 Imagination Technologies Ltd
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * MIPS assembly defines from sys/asm.h but rewritten for use with C inline
+ * assembly (rather than from within .s files).
+ */
+
+#ifndef AVCODEC_MIPS_ASMDEFS_H
+#define AVCODEC_MIPS_ASMDEFS_H
+
+#include <sgidefs.h>
+
+#if _MIPS_SIM == _ABI64
+# define PTRSIZE        " 8 "
+# define PTRLOG         " 3 "
+# define PTR_ADDU       "daddu "
+# define PTR_ADDIU      "daddiu "
+# define PTR_SUBU       "dsubu "
+# define PTR_L          "ld "
+#else
+# define PTRSIZE        " 4 "
+# define PTRLOG         " 2 "
+# define PTR_ADDU       "addu "
+# define PTR_ADDIU      "addiu "
+# define PTR_SUBU       "subu "
+# define PTR_L          "lw "
+#endif
+
+#endif /* AVCODEC_MIPS_ASMDEFS_H */