* simple math operations
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define AVCODEC_ARM_MATHOPS_H
#include <stdint.h>
+#include "config.h"
#include "libavutil/common.h"
-# define MULL MULL
-static inline av_const int MULL(int a, int b, unsigned shift)
-{
- int lo, hi;
- __asm__("smull %0, %1, %2, %3 \n\t"
- "mov %0, %0, lsr %4 \n\t"
- "add %1, %0, %1, lsl %5 \n\t"
- : "=&r"(lo), "=&r"(hi)
- : "r"(b), "r"(a), "i"(shift), "i"(32-shift));
- return hi;
-}
+#if HAVE_INLINE_ASM
+#if HAVE_ARMV6_INLINE
#define MULH MULH
-#ifdef HAVE_ARMV6
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;
}
-#else
-static inline av_const int MULH(int a, int b)
-{
- int lo, hi;
- __asm__ ("smull %0, %1, %2, %3" : "=&r"(lo), "=&r"(hi) : "r"(b), "r"(a));
- return hi;
-}
-#endif
-static inline av_const int64_t MUL64(int a, int b)
+#define FASTDIV FASTDIV
+static av_always_inline av_const int FASTDIV(int a, int b)
{
- union { uint64_t x; unsigned hl[2]; } x;
- __asm__ ("smull %0, %1, %2, %3"
- : "=r"(x.hl[0]), "=r"(x.hl[1]) : "r"(a), "r"(b));
- return x.x;
+ 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;
}
-#define MUL64 MUL64
-static inline av_const int64_t MAC64(int64_t d, int a, int b)
+#else /* HAVE_ARMV6_INLINE */
+
+#define FASTDIV FASTDIV
+static av_always_inline av_const int FASTDIV(int a, int b)
{
- union { uint64_t x; unsigned hl[2]; } x = { d };
- __asm__ ("smlal %0, %1, %2, %3"
- : "+r"(x.hl[0]), "+r"(x.hl[1]) : "r"(a), "r"(b));
- return x.x;
+ int r, t;
+ __asm__ ("umull %1, %0, %2, %3"
+ : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
+ return r;
}
-#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
+#endif
+
#define MLS64(d, a, b) MAC64(d, -(a), b)
-#if defined(HAVE_ARMV5TE)
+#if HAVE_ARMV5TE_INLINE
/* signed 16x16 -> 32 multiply add accumulate */
# define MAC16(rt, ra, rb) \
/* signed 16x16 -> 32 multiply */
# define MUL16 MUL16
-static inline av_const MUL16(int ra, int rb)
+static inline av_const int MUL16(int ra, int rb)
{
int rt;
__asm__ ("smulbb %0, %1, %2" : "=r"(rt) : "r"(ra), "r"(rb));
#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 */