mirror of
https://github.com/FFmpeg/FFmpeg.git
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101 lines
4.6 KiB
C
101 lines
4.6 KiB
C
/*
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* inline assembly helper macros
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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_X86_INLINE_ASM_H
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#define AVCODEC_X86_INLINE_ASM_H
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#include "constants.h"
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#define MOVQ_WONE(regd) \
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__asm__ volatile ( \
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"pcmpeqd %%" #regd ", %%" #regd " \n\t" \
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"psrlw $15, %%" #regd ::)
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#define JUMPALIGN() __asm__ volatile (".p2align 3"::)
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#define MOVQ_ZERO(regd) __asm__ volatile ("pxor %%"#regd", %%"#regd ::)
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#define MOVQ_BFE(regd) \
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__asm__ volatile ( \
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"pcmpeqd %%"#regd", %%"#regd" \n\t" \
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"paddb %%"#regd", %%"#regd" \n\t" ::)
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#ifndef PIC
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#define MOVQ_WTWO(regd) __asm__ volatile ("movq %0, %%"#regd" \n\t" :: "m"(ff_pw_2))
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#else
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// for shared library it's better to use this way for accessing constants
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// pcmpeqd -> -1
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#define MOVQ_WTWO(regd) \
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__asm__ volatile ( \
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"pcmpeqd %%"#regd", %%"#regd" \n\t" \
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"psrlw $15, %%"#regd" \n\t" \
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"psllw $1, %%"#regd" \n\t"::)
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#endif
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// using regr as temporary and for the output result
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// first argument is unmodifed and second is trashed
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// regfe is supposed to contain 0xfefefefefefefefe
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#define PAVGB_MMX_NO_RND(rega, regb, regr, regfe) \
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"movq "#rega", "#regr" \n\t" \
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"pand "#regb", "#regr" \n\t" \
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"pxor "#rega", "#regb" \n\t" \
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"pand "#regfe", "#regb" \n\t" \
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"psrlq $1, "#regb" \n\t" \
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"paddb "#regb", "#regr" \n\t"
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#define PAVGB_MMX(rega, regb, regr, regfe) \
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"movq "#rega", "#regr" \n\t" \
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"por "#regb", "#regr" \n\t" \
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"pxor "#rega", "#regb" \n\t" \
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"pand "#regfe", "#regb" \n\t" \
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"psrlq $1, "#regb" \n\t" \
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"psubb "#regb", "#regr" \n\t"
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// mm6 is supposed to contain 0xfefefefefefefefe
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#define PAVGBP_MMX_NO_RND(rega, regb, regr, regc, regd, regp) \
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"movq "#rega", "#regr" \n\t" \
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"movq "#regc", "#regp" \n\t" \
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"pand "#regb", "#regr" \n\t" \
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"pand "#regd", "#regp" \n\t" \
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"pxor "#rega", "#regb" \n\t" \
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"pxor "#regc", "#regd" \n\t" \
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"pand %%mm6, "#regb" \n\t" \
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"pand %%mm6, "#regd" \n\t" \
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"psrlq $1, "#regb" \n\t" \
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"psrlq $1, "#regd" \n\t" \
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"paddb "#regb", "#regr" \n\t" \
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"paddb "#regd", "#regp" \n\t"
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#define PAVGBP_MMX(rega, regb, regr, regc, regd, regp) \
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"movq "#rega", "#regr" \n\t" \
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"movq "#regc", "#regp" \n\t" \
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"por "#regb", "#regr" \n\t" \
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"por "#regd", "#regp" \n\t" \
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"pxor "#rega", "#regb" \n\t" \
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"pxor "#regc", "#regd" \n\t" \
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"pand %%mm6, "#regb" \n\t" \
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"pand %%mm6, "#regd" \n\t" \
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"psrlq $1, "#regd" \n\t" \
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"psrlq $1, "#regb" \n\t" \
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"psubb "#regb", "#regr" \n\t" \
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"psubb "#regd", "#regp" \n\t"
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#endif /* AVCODEC_X86_INLINE_ASM_H */
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