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-rw-r--r--media/ffvpx/libavcodec/arm/mathops.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/arm/mathops.h b/media/ffvpx/libavcodec/arm/mathops.h
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+++ b/media/ffvpx/libavcodec/arm/mathops.h
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+/*
+ * simple math operations
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
+ *
+ * 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_ARM_MATHOPS_H
+#define AVCODEC_ARM_MATHOPS_H
+
+#include <stdint.h>
+#include "config.h"
+#include "libavutil/common.h"
+
+#if HAVE_INLINE_ASM
+
+#if HAVE_ARMV6_INLINE
+#define MULH MULH
+static inline av_const int MULH(int a, int b)
+{
+ int r;
+ __asm__ ("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
+ return r;
+}
+
+#define FASTDIV FASTDIV
+static av_always_inline av_const int FASTDIV(int a, int b)
+{
+ int r;
+ __asm__ ("cmp %2, #2 \n\t"
+ "ldr %0, [%3, %2, lsl #2] \n\t"
+ "ite le \n\t"
+ "lsrle %0, %1, #1 \n\t"
+ "smmulgt %0, %0, %1 \n\t"
+ : "=&r"(r) : "r"(a), "r"(b), "r"(ff_inverse) : "cc");
+ return r;
+}
+
+#else /* HAVE_ARMV6_INLINE */
+
+#define FASTDIV FASTDIV
+static av_always_inline av_const int FASTDIV(int a, int b)
+{
+ int r, t;
+ __asm__ ("umull %1, %0, %2, %3"
+ : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
+ return r;
+}
+#endif
+
+#define MLS64(d, a, b) MAC64(d, -(a), b)
+
+#if HAVE_ARMV5TE_INLINE
+
+/* signed 16x16 -> 32 multiply add accumulate */
+# define MAC16(rt, ra, rb) \
+ __asm__ ("smlabb %0, %1, %2, %0" : "+r"(rt) : "r"(ra), "r"(rb));
+
+/* signed 16x16 -> 32 multiply */
+# define MUL16 MUL16
+static inline av_const int MUL16(int ra, int rb)
+{
+ int rt;
+ __asm__ ("smulbb %0, %1, %2" : "=r"(rt) : "r"(ra), "r"(rb));
+ return rt;
+}
+
+#endif
+
+#define mid_pred mid_pred
+static inline av_const int mid_pred(int a, int b, int c)
+{
+ int m;
+ __asm__ (
+ "mov %0, %2 \n\t"
+ "cmp %1, %2 \n\t"
+ "itt gt \n\t"
+ "movgt %0, %1 \n\t"
+ "movgt %1, %2 \n\t"
+ "cmp %1, %3 \n\t"
+ "it le \n\t"
+ "movle %1, %3 \n\t"
+ "cmp %0, %1 \n\t"
+ "it gt \n\t"
+ "movgt %0, %1 \n\t"
+ : "=&r"(m), "+r"(a)
+ : "r"(b), "r"(c)
+ : "cc");
+ return m;
+}
+
+#endif /* HAVE_INLINE_ASM */
+
+#endif /* AVCODEC_ARM_MATHOPS_H */