early-access version 1432

externals/ffmpeg/libavcodec/arm/int_neon.S

@@ -0,0 +1,51 @@
+/*
+ * ARM NEON optimised integer operations
+ * Copyright (c) 2009 Konstantin Shishkov
+ *
+ * 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
+ */
+
+#include "libavutil/arm/asm.S"
+
+function ff_scalarproduct_int16_neon, export=1
+        vmov.i16        q0,  #0
+        vmov.i16        q1,  #0
+        vmov.i16        q2,  #0
+        vmov.i16        q3,  #0
+1:      vld1.16         {d16-d17}, [r0]!
+        vld1.16         {d20-d21}, [r1,:128]!
+        vmlal.s16       q0,  d16,  d20
+        vld1.16         {d18-d19}, [r0]!
+        vmlal.s16       q1,  d17,  d21
+        vld1.16         {d22-d23}, [r1,:128]!
+        vmlal.s16       q2,  d18,  d22
+        vmlal.s16       q3,  d19,  d23
+        subs            r2,  r2,   #16
+        bgt             1b
+
+        vpadd.s32       d16, d0,   d1
+        vpadd.s32       d17, d2,   d3
+        vpadd.s32       d18, d4,   d5
+        vpadd.s32       d19, d6,   d7
+        vpadd.s32       d0,  d16,  d17
+        vpadd.s32       d1,  d18,  d19
+        vpadd.s32       d2,  d0,   d1
+        vpaddl.s32      d3,  d2
+        vmov.32         r0,  d3[0]
+        bx              lr
+endfunc
+