Merge commit '5b59a9fc6152169599561f04b4f66370edda5c9c'

* commit '5b59a9fc6152169599561f04b4f66370edda5c9c':
  x86: dcadsp: implement int8x8_fmul_int32

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 52 insertions, 0 deletions

diff --git a/libavcodec/x86/dca.h b/libavcodec/x86/dca.h
new file mode 100644
index 0000000000..080e239fdd
--- /dev/null
+++ b/libavcodec/x86/dca.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2012-2014 Christophe Gisquet <christophe.gisquet@gmail.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
+ */
+
+#if ARCH_X86_64
+# include "libavutil/x86/asm.h"
+# include "libavutil/mem.h"
+
+# define int8x8_fmul_int32 int8x8_fmul_int32
+static inline void int8x8_fmul_int32(av_unused DCADSPContext *dsp,
+                                     float *dst, const int8_t *src, int scale)
+{
+    DECLARE_ALIGNED(16, static const uint32_t, inverse16) = 0x3D800000;
+    __asm__ volatile (
+        "cvtsi2ss        %2, %%xmm0 \n\t"
+        "mulss           %3, %%xmm0 \n\t"
+        "movq          (%1), %%xmm1 \n\t"
+        "punpcklbw   %%xmm1, %%xmm1 \n\t"
+        "movaps      %%xmm1, %%xmm2 \n\t"
+        "punpcklwd   %%xmm1, %%xmm1 \n\t"
+        "punpckhwd   %%xmm2, %%xmm2 \n\t"
+        "psrad          $24, %%xmm1 \n\t"
+        "psrad          $24, %%xmm2 \n\t"
+        "shufps  $0, %%xmm0, %%xmm0 \n\t"
+        "cvtdq2ps    %%xmm1, %%xmm1 \n\t"
+        "cvtdq2ps    %%xmm2, %%xmm2 \n\t"
+        "mulps       %%xmm0, %%xmm1 \n\t"
+        "mulps       %%xmm0, %%xmm2 \n\t"
+        "movaps      %%xmm1,  0(%0) \n\t"
+        "movaps      %%xmm2, 16(%0) \n\t"
+        :: "r"(dst), "r"(src), "m"(scale), "m"(inverse16)
+        XMM_CLOBBERS_ONLY("xmm0", "xmm1", "xmm2")
+    );
+}
+
+#endif /* ARCH_X86_64 */