2 * simple math operations
3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVCODEC_X86_MATHOPS_H
23 #define AVCODEC_X86_MATHOPS_H
26 #include "libavutil/common.h"
27 #include "libavutil/x86/asm.h"
34 static av_always_inline av_const int MULL(int a, int b, unsigned shift)
39 "shrdl %4, %%edx, %%eax \n\t"
40 :"=a"(rt), "=d"(dummy)
41 :"a"(a), "rm"(b), "ci"((uint8_t)shift)
47 static av_always_inline av_const int MULH(int a, int b)
52 :"=d"(rt), "=a"(dummy)
59 static av_always_inline av_const int64_t MUL64(int a, int b)
70 #endif /* ARCH_X86_32 */
74 #define mid_pred mid_pred
75 static inline av_const int mid_pred(int a, int b, int c)
93 #define COPY3_IF_LT(x, y, a, b, c, d)\
99 : "+&r" (x), "+&r" (a), "+r" (c)\
100 : "r" (y), "r" (b), "r" (d)\
102 #endif /* HAVE_6REGS */
103 #endif /* HAVE_I686 */
105 #define MASK_ABS(mask, level) \
106 __asm__ ("cdq \n\t" \
109 : "+a"(level), "=&d"(mask))
111 // avoid +32 for shift optimization (gcc should do that ...)
112 #define NEG_SSR32 NEG_SSR32
113 static inline int32_t NEG_SSR32( int32_t a, int8_t s){
114 __asm__ ("sarl %1, %0\n\t"
116 : "ic" ((uint8_t)(-s))
121 #define NEG_USR32 NEG_USR32
122 static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
123 __asm__ ("shrl %1, %0\n\t"
125 : "ic" ((uint8_t)(-s))
130 #endif /* HAVE_INLINE_ASM */
131 #endif /* AVCODEC_X86_MATHOPS_H */