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authorMarc Hoffman <mmhoffm@gmail.com>2007-08-30 15:15:48 +0000
committerMarc Hoffman <mmhoffm@gmail.com>2007-08-30 15:15:48 +0000
commit543a90d14ae9c4e96ce33491f2d262bfaca6dc21 (patch)
tree3b9ca12e227c4944a21a76b5785d56f04cb1c286 /libavcodec
parenteafa1c90e573c14562987390d1001d4e636d5a74 (diff)
downloadffmpeg-543a90d14ae9c4e96ce33491f2d262bfaca6dc21.tar.gz
Blackfin 32bit multiplication primitives MULH MUL16
Originally committed as revision 10262 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
-rw-r--r--libavcodec/bfin/mathops.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/libavcodec/bfin/mathops.h b/libavcodec/bfin/mathops.h
new file mode 100644
index 0000000000..eab4446caf
--- /dev/null
+++ b/libavcodec/bfin/mathops.h
@@ -0,0 +1,52 @@
+/*
+ * mathops.h
+ *
+ * Copyright (C) 2007 Marc Hoffman <mmhoffm@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
+ */
+#ifndef MATHOPS_BFIN
+#define MATHOPS_BFIN
+
+#ifdef CONFIG_MPEGAUDIO_HP
+#define MULH(X,Y) ({ int xxo; \
+ asm ( \
+ "a1 = %2.L * %1.L (FU);\n\t" \
+ "a1 = a1 >> 16;\n\t" \
+ "a1 += %2.H * %1.L (IS,M);\n\t" \
+ "a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\
+ "a1 = a1 >>> 16;\n\t" \
+ "%0 = (a0 += a1);\n\t" \
+ : "=d" (xxo) : "d" (X), "d" (Y)); xxo; })
+#else
+#define MULH(X,Y) ({ int xxo; \
+ asm ( \
+ "a1 = %2.H * %1.L (IS,M);\n\t" \
+ "a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\
+ "a1 = a1 >>> 16;\n\t" \
+ "%0 = (a0 += a1);\n\t" \
+ : "=d" (xxo) : "d" (X), "d" (Y)); xxo; })
+#endif
+
+/* signed 16x16 -> 32 multiply */
+#define MUL16(a, b) ({ int xxo; \
+ asm ( \
+ "%0 = %1.l*%2.l (is);\n\t" \
+ : "=W" (xxo) : "d" (a), "d" (b)); \
+ xxo; })
+
+#endif