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Blackfin 32bit multiplication primitives MULH MUL16
Originally committed as revision 10262 to svn://svn.ffmpeg.org/ffmpeg/trunk
Marc Hoffman authored on 2007/08/31 00:15:48Showing 1 changed files
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+/* |
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+ * mathops.h |
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+ * |
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+ * Copyright (C) 2007 Marc Hoffman <mmhoffm@gmail.com> |
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+ * |
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+ * This file is part of FFmpeg. |
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+ * |
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+ * FFmpeg is free software; you can redistribute it and/or |
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+ * modify it under the terms of the GNU Lesser General Public |
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+ * License as published by the Free Software Foundation; either |
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+ * version 2.1 of the License, or (at your option) any later version. |
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+ * |
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+ * FFmpeg is distributed in the hope that it will be useful, |
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ * Lesser General Public License for more details. |
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+ * |
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+ * You should have received a copy of the GNU Lesser General Public |
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+ * License along with FFmpeg; if not, write to the Free Software |
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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+ */ |
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+#ifndef MATHOPS_BFIN |
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+#define MATHOPS_BFIN |
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+ |
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+#ifdef CONFIG_MPEGAUDIO_HP |
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+#define MULH(X,Y) ({ int xxo; \
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+ asm ( \ |
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+ "a1 = %2.L * %1.L (FU);\n\t" \ |
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+ "a1 = a1 >> 16;\n\t" \ |
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+ "a1 += %2.H * %1.L (IS,M);\n\t" \ |
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+ "a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\ |
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+ "a1 = a1 >>> 16;\n\t" \ |
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+ "%0 = (a0 += a1);\n\t" \ |
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+ : "=d" (xxo) : "d" (X), "d" (Y)); xxo; }) |
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+#else |
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+#define MULH(X,Y) ({ int xxo; \
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+ asm ( \ |
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+ "a1 = %2.H * %1.L (IS,M);\n\t" \ |
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+ "a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\ |
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+ "a1 = a1 >>> 16;\n\t" \ |
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+ "%0 = (a0 += a1);\n\t" \ |
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+ : "=d" (xxo) : "d" (X), "d" (Y)); xxo; }) |
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+#endif |
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+ |
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+/* signed 16x16 -> 32 multiply */ |
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+#define MUL16(a, b) ({ int xxo; \
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+ asm ( \ |
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+ "%0 = %1.l*%2.l (is);\n\t" \ |
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+ : "=W" (xxo) : "d" (a), "d" (b)); \ |
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+ xxo; }) |
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+ |
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+#endif |