author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 16:46:38 +0300 | |
changeset 18 | 47c74d1534e1 |
permissions | -rw-r--r-- |
18
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/* |
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* LIBOIL - Library of Optimized Inner Loops |
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* Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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//Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include <liboil/liboilfunction.h> |
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#include "conv.h" |
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#ifdef HAVE_IEEE754_H |
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|
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#include <ieee754.h> |
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static void conv_f32_u8_bitstuff(float *dst, int dest_stride, const uint8_t *src, |
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int src_stride, int n) |
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{ |
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const float offset = -65536; |
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union ieee754_float id; |
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int i; |
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id.f = 0x1ffff; |
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for(i=0;i<n;i++){ |
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id.ieee.mantissa = (*src<<7); |
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*dst = id.f + offset; |
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OIL_INCREMENT(dst, dest_stride); |
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OIL_INCREMENT(src, src_stride); |
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} |
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} |
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OIL_DEFINE_IMPL(conv_f32_u8_bitstuff, conv_f32_u8); |
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|
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static void conv_f32_s8_bitstuff(float *dst, int dest_stride, const int8_t *src, |
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int src_stride, int n) |
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{ |
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const float offset = -384; |
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union ieee754_float id; |
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int i; |
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id.f = 0x1ff; |
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for(i=0;i<n;i++){ |
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id.ieee.mantissa = ((*src^0x80)<<15); |
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*dst = id.f + offset; |
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OIL_INCREMENT(dst, dest_stride); |
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OIL_INCREMENT(src, src_stride); |
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} |
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} |
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OIL_DEFINE_IMPL(conv_f32_s8_bitstuff, conv_f32_s8); |
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|
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static void conv_f32_u16_bitstuff(float *dst, int dest_stride, const uint16_t *src, |
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int src_stride, int n) |
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{ |
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const float offset = -65536; |
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union ieee754_float id; |
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int i; |
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|
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id.f = 0x1ffff; |
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for(i=0;i<n;i++){ |
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id.ieee.mantissa = (*src<<7); |
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*dst = id.f + offset; |
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OIL_INCREMENT(dst, dest_stride); |
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OIL_INCREMENT(src, src_stride); |
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} |
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} |
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OIL_DEFINE_IMPL(conv_f32_u16_bitstuff, conv_f32_u16); |
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|
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#ifdef ENABLE_BROKEN_IMPLS |
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/* This is intermittently broken on powerpc for unknown reasons */ |
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static void conv_f32_s16_bitstuff(float *dst, int dest_stride, const int16_t *src, |
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int src_stride, int n) |
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{ |
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const float offset = -98304; |
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union ieee754_float id; |
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int i; |
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|
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id.f = 0x1ffff; |
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for(i=0;i<n;i++){ |
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id.ieee.mantissa = ((*src^0x8000)<<7); |
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*dst = id.f + offset; |
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OIL_INCREMENT(dst, dest_stride); |
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OIL_INCREMENT(src, src_stride); |
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105 |
} |
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106 |
} |
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OIL_DEFINE_IMPL(conv_f32_s16_bitstuff, conv_f32_s16); |
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108 |
#endif |
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109 |
|
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110 |
|
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#define signbit_S32(x) (((uint32_t)(x))>>31) |
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112 |
|
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113 |
#if 0 |
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/* broken */ |
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/* This implementation is slightly inaccurate */ |
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static void conv_s16_f32_bitstuff(int16_t *dst, int dest_stride, const float *src, |
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int src_stride, int n) |
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118 |
{ |
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const float offset = 98304.5; |
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union ieee754_double id; |
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int i; |
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int16_t d; |
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123 |
|
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for(i=0;i<n;i++){ |
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id.d = offset + *src; |
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d = 0x8000 | (id.ieee.mantissa0 >> 4); |
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d += (-32768-d)*signbit_S32(id.ieee.exponent-1039); |
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d += (32767-d)*signbit_S32(1039-id.ieee.exponent); |
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*dst = d; |
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OIL_INCREMENT(dst, dest_stride); |
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OIL_INCREMENT(src, src_stride); |
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132 |
} |
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133 |
} |
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134 |
OIL_DEFINE_IMPL(conv_s16_f32_bitstuff, conv_s16_f32); |
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135 |
#endif |
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136 |
|
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137 |
|
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138 |
#if 0 |
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139 |
static void conv_f64_u8_bitstuff(float *dst, int dest_stride, const uint8_t *src, |
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140 |
int src_stride, int n) |
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141 |
{ |
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const float offset = -65536; |
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143 |
union ieee754_float id; |
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144 |
int i; |
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145 |
|
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id.f = 0x1ffff; |
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for(i=0;i<n;i++){ |
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id.ieee.mantissa = (*src<<7); |
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*dst = id.f + offset; |
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OIL_INCREMENT(dst, dest_stride); |
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OIL_INCREMENT(src, src_stride); |
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152 |
} |
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153 |
} |
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154 |
OIL_DEFINE_IMPL(conv_f64_u8_bitstuff, conv_f64_u8); |
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155 |
|
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static void conv_f64_s8_bitstuff(float *dst, int dest_stride, const int8_t *src, |
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int src_stride, int n) |
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158 |
{ |
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const float offset = -384; |
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160 |
union ieee754_float id; |
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161 |
int i; |
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162 |
|
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id.f = 0x1ff; |
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for(i=0;i<n;i++){ |
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id.ieee.mantissa = ((*src^0x80)<<15); |
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166 |
*dst = id.f + offset; |
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OIL_INCREMENT(dst, dest_stride); |
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OIL_INCREMENT(src, src_stride); |
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169 |
} |
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170 |
} |
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171 |
OIL_DEFINE_IMPL(conv_f64_s8_bitstuff, conv_f64_s8); |
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172 |
|
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173 |
static void conv_f64_u16_bitstuff(float *dst, int dest_stride, const uint16_t *src, |
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174 |
int src_stride, int n) |
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175 |
{ |
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const float offset = -65536; |
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union ieee754_float id; |
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int i; |
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179 |
|
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id.f = 0x1ffff; |
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181 |
for(i=0;i<n;i++){ |
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id.ieee.mantissa = (*src<<7); |
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*dst = id.f + offset; |
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184 |
OIL_INCREMENT(dst, dest_stride); |
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185 |
OIL_INCREMENT(src, src_stride); |
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186 |
} |
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187 |
} |
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188 |
OIL_DEFINE_IMPL(conv_f64_u16_bitstuff, conv_f64_u16); |
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189 |
|
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static void conv_f64_s16_bitstuff(float *dst, int dest_stride, const int16_t *src, |
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191 |
int src_stride, int n) |
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192 |
{ |
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const float offset = -98304; |
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union ieee754_float id; |
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int i; |
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196 |
|
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id.f = 0x1ffff; |
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for(i=0;i<n;i++){ |
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id.ieee.mantissa = ((*src^0x8000)<<7); |
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*dst = id.f + offset; |
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201 |
OIL_INCREMENT(dst, dest_stride); |
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202 |
OIL_INCREMENT(src, src_stride); |
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} |
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} |
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OIL_DEFINE_IMPL(conv_f64_s16_bitstuff, conv_f64_s16); |
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#endif |
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|
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#if 0 |
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/* broken */ |
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/* This implementation is slightly inaccurate */ |
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static void conv_s16_f64_bitstuff(int16_t *dst, int dest_stride, const float *src, |
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int src_stride, int n) |
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{ |
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const float offset = 98304.5; |
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union ieee754_double id; |
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int i; |
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int16_t d; |
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|
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for(i=0;i<n;i++){ |
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id.d = offset + *src; |
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d = 0x8000 ^ (id.ieee.mantissa0 >> 4); |
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d += (-32768-d)*signbit_S32(id.ieee.exponent-1039); |
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d += (32767-d)*signbit_S32(1039-id.ieee.exponent); |
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#if 0 |
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/* for clipping */ |
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if (id.ieee.exponent < 1039) { |
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d = -32768; |
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} |
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if (id.ieee.exponent > 1039) { |
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d = 32767; |
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} |
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#endif |
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*dst = d; |
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OIL_INCREMENT (dst, dest_stride); |
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OIL_INCREMENT (src, src_stride); |
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} |
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} |
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OIL_DEFINE_IMPL(conv_s16_f64_bitstuff, conv_s16_f64); |
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#endif |
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|
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|
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|
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|
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|
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#ifdef __SYMBIAN32__ |
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|
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OilFunctionImpl* __oil_function_impl_conv_f32_u8_bitstuff() { |
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return &_oil_function_impl_conv_f32_u8_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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|
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OilFunctionImpl* __oil_function_impl_conv_f32_s8_bitstuff() { |
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return &_oil_function_impl_conv_f32_s8_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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|
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OilFunctionImpl* __oil_function_impl_conv_f32_u16_bitstuff() { |
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return &_oil_function_impl_conv_f32_u16_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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|
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OilFunctionImpl* __oil_function_impl_conv_f32_s16_bitstuff() { |
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return &_oil_function_impl_conv_f32_s16_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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|
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OilFunctionImpl* __oil_function_impl_conv_s16_f32_bitstuff() { |
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return &_oil_function_impl_conv_s16_f32_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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|
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OilFunctionImpl* __oil_function_impl_conv_f64_u8_bitstuff() { |
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return &_oil_function_impl_conv_f64_u8_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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OilFunctionImpl* __oil_function_impl_conv_f64_s8_bitstuff() { |
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return &_oil_function_impl_conv_f64_s8_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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|
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OilFunctionImpl* __oil_function_impl_conv_f64_u16_bitstuff() { |
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return &_oil_function_impl_conv_f64_u16_bitstuff; |
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} |
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#endif |
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|
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#ifdef __SYMBIAN32__ |
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OilFunctionImpl* __oil_function_impl_conv_f64_s16_bitstuff() { |
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return &_oil_function_impl_conv_f64_s16_bitstuff; |
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} |
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#endif |
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#ifdef __SYMBIAN32__ |
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OilFunctionImpl* __oil_function_impl_conv_s16_f64_bitstuff() { |
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return &_oil_function_impl_conv_s16_f64_bitstuff; |
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} |
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#endif |
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#endif |