X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Farm%2Fmathops.h;h=45ac67d43625515678c53d05fdee98f85688267e;hb=efd26bedec9a345a5960dbfcbaec888418f2d4e6;hp=e36316c76bed7ba1412819fcb448711bfe03b4c2;hpb=a2fc0f6a6ddf884ace3c96a0d4f09f0932e6db32;p=ffmpeg

diff --git a/libavcodec/arm/mathops.h b/libavcodec/arm/mathops.h
index e36316c76be..45ac67d4362 100644
--- a/libavcodec/arm/mathops.h
+++ b/libavcodec/arm/mathops.h
@@ -2,20 +2,20 @@
  * 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
  */
 
@@ -23,57 +23,48 @@
 #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)                                            \
@@ -81,7 +72,7 @@ static inline av_const int64_t MAC64(int64_t d, int a, int b)
 
 /* 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));
@@ -90,4 +81,28 @@ static inline av_const MUL16(int ra, int 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 */