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Neither the asm() nor the __asm__() keyword is part of the C99 standard, but while GCC accepts the former in C89 syntax, it is not accepted in C99 unless GNU extensions are turned on (with -fasm). The latter form is accepted in any syntax as an extension (without requiring further command-line options). Sun Studio C99 compiler also does not accept asm() while accepting __asm__(), albeit reporting warnings that it's not valid C99 syntax. Originally committed as revision 15627 to svn://svn.ffmpeg.org/ffmpeg/trunk
53 lines
2.2 KiB
C
53 lines
2.2 KiB
C
/*
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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 AVCODEC_BFIN_MATHOPS_H
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#define AVCODEC_BFIN_MATHOPS_H
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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) : "A0","A1"); 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) : "A0","A1"); xxo; })
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#endif
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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) : "A1"); \
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xxo; })
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#endif /* AVCODEC_BFIN_MATHOPS_H */
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