2 * LIBOIL - Library of Optimized Inner Loops
3 * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
27 //Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
33 #include <liboil/liboilfunction.h>
34 #include "liboil/simdpack/simdpack.h"
36 /* This is a suprisingly fast implementation of clipping
37 * in straight C. It would be difficult to do it faster in asm
38 * without specialized opcodes. */
41 clip_s16_fast (int16_t *dest, int dstr, int16_t *src, int sstr, int n,
42 int16_t *low, int16_t *hi)
48 x = OIL_GET(src,i*sstr, int16_t);
49 x = x - (((x-*low)>>31)&(x-*low)) + (((*hi-x)>>31)&(*hi-x));
50 OIL_GET(dest,i*dstr, int16_t) = x;
54 OIL_DEFINE_IMPL (clip_s16_fast, clip_s16);
57 clip_s16_fast2 (int16_t *dest, int dstr, int16_t *src, int sstr, int n,
58 int16_t *low, int16_t *hi)
64 OIL_INCREMENT(src,sstr);
65 x1 -= (((x1-*low)>>31)&(x1-*low));
66 *dest = x1 + (((*hi-x1)>>31)&(*hi-x1));
67 OIL_INCREMENT(dest,dstr);
72 OIL_INCREMENT(src,sstr);
74 OIL_INCREMENT(src,sstr);
75 x1 -= (((x1-*low)>>31)&(x1-*low));
76 x2 -= (((x2-*low)>>31)&(x2-*low));
77 *dest = x1 + (((*hi-x1)>>31)&(*hi-x1));
78 OIL_INCREMENT(dest,dstr);
79 *dest = x2 + (((*hi-x2)>>31)&(*hi-x2));
80 OIL_INCREMENT(dest,dstr);
84 OIL_DEFINE_IMPL (clip_s16_fast2, clip_s16);
93 * the range min^(1<<31) to max^(1<<31) incorrectly with int32_t.
94 * Thus the use of int64_t. */
97 clip_s32_fast (int32_t *dest, int dstr, int32_t *src, int sstr, int n,
98 int32_t *low, int32_t *hi)
104 x = OIL_GET(src,i*sstr,int32_t);
105 x = x - (((x-*low)>>63)&(x-*low)) + (((*hi-x)>>63)&(*hi-x));
106 OIL_GET(dest,i*dstr,int32_t) = x;
110 OIL_DEFINE_IMPL (clip_s32_fast, clip_s32);
118 OilFunctionImpl* __oil_function_impl_clip_s16_fast() {
119 return &_oil_function_impl_clip_s16_fast;
125 OilFunctionImpl* __oil_function_impl_clip_s16_fast2() {
126 return &_oil_function_impl_clip_s16_fast2;
132 OilFunctionImpl* __oil_function_impl_clip_s32_fast() {
133 return &_oil_function_impl_clip_s32_fast;