sl@0: /*
sl@0:  * LIBOIL - Library of Optimized Inner Loops
sl@0:  * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
sl@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
sl@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sl@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sl@0:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sl@0:  * POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0: //Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 
sl@0: 
sl@0: #ifdef HAVE_CONFIG_H
sl@0: #include "config.h"
sl@0: #endif
sl@0: 
sl@0: #include <liboil/liboilfunction.h>
sl@0: #include "liboil/simdpack/simdpack.h"
sl@0: 
sl@0: #define ABS(x) ((x)>0 ? (x) : -(x))
sl@0: 
sl@0: static void
sl@0: abs_u16_s16_unroll2 (uint16_t * dest, int dstr, int16_t * src, int sstr, int n)
sl@0: {
sl@0:   while (n & 1) {
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     n--;
sl@0:   }
sl@0:   while (n > 0) {
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     n -= 2;
sl@0:   }
sl@0: }
sl@0: OIL_DEFINE_IMPL (abs_u16_s16_unroll2, abs_u16_s16);
sl@0: 
sl@0: static void
sl@0: abs_u16_s16_unroll4 (uint16_t * dest, int dstr, int16_t * src, int sstr, int n)
sl@0: {
sl@0:   while (n & 3) {
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     n--;
sl@0:   }
sl@0:   while (n > 0) {
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     *dest = ABS (*src);
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:     n -= 4;
sl@0:   }
sl@0: }
sl@0: OIL_DEFINE_IMPL (abs_u16_s16_unroll4, abs_u16_s16);
sl@0: 
sl@0: static void
sl@0: abs_u16_s16_fast (uint16_t * dest, int dstr, int16_t * src, int sstr, int n)
sl@0: {
sl@0:   int i;
sl@0:   int16_t x, y;
sl@0: 
sl@0:   for (i = 0; i < n; i++) {
sl@0:     x = *src;
sl@0:     y = ((x >> 15) & x);
sl@0:     *dest = x - y - y;
sl@0:     OIL_INCREMENT (dest, dstr);
sl@0:     OIL_INCREMENT (src, sstr);
sl@0:   }
sl@0: }
sl@0: 
sl@0: OIL_DEFINE_IMPL (abs_u16_s16_fast, abs_u16_s16);
sl@0: 
sl@0: 
sl@0: /* Similar algorithm as clipping, but for absolute value.  Note the stunt
sl@0:  * pulled to get around 2*y rolling over.  */
sl@0: 
sl@0: static void
sl@0: abs_u32_s32_fast (uint32_t * dest, int dstr, int32_t * src, int sstr, int n)
sl@0: {
sl@0:   int i;
sl@0:   int32_t x, y;
sl@0: 
sl@0:   for (i = 0; i < n; i++) {
sl@0:     x = OIL_GET(src, i * sstr, int32_t);
sl@0:     y = ((x >> 31) & x);
sl@0:     OIL_GET(dest, i * dstr, uint32_t) = x - y - y;
sl@0:   }
sl@0: }
sl@0: 
sl@0: OIL_DEFINE_IMPL (abs_u32_s32_fast, abs_u32_s32);
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_abs_u16_s16_unroll2() {
sl@0: 		return &_oil_function_impl_abs_u16_s16_unroll2;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_abs_u16_s16_unroll4() {
sl@0: 		return &_oil_function_impl_abs_u16_s16_unroll4;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_abs_u16_s16_fast() {
sl@0: 		return &_oil_function_impl_abs_u16_s16_fast;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_abs_u32_s32_fast() {
sl@0: 		return &_oil_function_impl_abs_u32_s32_fast;
sl@0: }
sl@0: #endif
sl@0: