MIPS: add MIPS64 and Loongson asm for MAC64/MLS64

Originally committed as revision 18979 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mathops.h

@@ -28,6 +28,8 @@
 #   include "arm/mathops.h"
 #elif ARCH_BFIN
 #   include "bfin/mathops.h"
+#elif ARCH_MIPS
+#   include "mips/mathops.h"
 #elif ARCH_PPC
 #   include "ppc/mathops.h"
 #elif ARCH_X86

libavcodec/mips/mathops.h

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
+ *
+ * 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
+ */
+
+#ifndef AVCODEC_MIPS_MATHOPS_H
+#define AVCODEC_MIPS_MATHOPS_H
+
+#include "config.h"
+
+#if HAVE_LOONGSON
+
+static inline av_const int64_t MAC64(int64_t d, int a, int b)
+{
+    int64_t m;
+    __asm__ ("dmult.g %1, %2, %3 \n\t"
+             "daddu   %0, %0, %1 \n\t"
+             : "+r"(d), "=&r"(m) : "r"(a), "r"(b));
+    return d;
+}
+#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
+
+static inline av_const int64_t MLS64(int64_t d, int a, int b)
+{
+    int64_t m;
+    __asm__ ("dmult.g %1, %2, %3 \n\t"
+             "dsubu   %0, %0, %1 \n\t"
+             : "+r"(d), "=&r"(m) : "r"(a), "r"(b));
+    return d;
+}
+#define MLS64(d, a, b) ((d) = MLS64(d, a, b))
+
+#elif ARCH_MIPS64
+
+static inline av_const int64_t MAC64(int64_t d, int a, int b)
+{
+    int64_t m;
+    __asm__ ("dmult %2, %3     \n\t"
+             "mflo  %1         \n\t"
+             "daddu %0, %0, %1 \n\t"
+             : "+r"(d), "=&r"(m) : "r"(a), "r"(b));
+    return d;
+}
+#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
+
+static inline av_const int64_t MLS64(int64_t d, int a, int b)
+{
+    int64_t m;
+    __asm__ ("dmult %2, %3     \n\t"
+             "mflo  %1         \n\t"
+             "dsubu %0, %0, %1 \n\t"
+             : "+r"(d), "=&r"(m) : "r"(a), "r"(b));
+    return d;
+}
+#define MLS64(d, a, b) ((d) = MLS64(d, a, b))
+
+#endif
+
+#endif /* AVCODEC_MIPS_MATHOPS_H */