2 ** Copyright 2003-2010, VisualOn, Inc.
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4 ** Licensed under the Apache License, Version 2.0 (the "License");
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5 ** you may not use this file except in compliance with the License.
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6 ** You may obtain a copy of the License at
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8 ** http://www.apache.org/licenses/LICENSE-2.0
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10 ** Unless required by applicable law or agreed to in writing, software
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11 ** distributed under the License is distributed on an "AS IS" BASIS,
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12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 ** See the License for the specific language governing permissions and
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14 ** limitations under the License.
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18 /*--------------------------------------------------------------------------*
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20 *--------------------------------------------------------------------------*
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21 * Mathematical operations *
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22 *--------------------------------------------------------------------------*/
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24 #ifndef __MATH_OP_H__
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25 #define __MATH_OP_H__
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27 Word32 Isqrt( /* (o) Q31 : output value (range: 0<=val<1) */
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28 Word32 L_x /* (i) Q0 : input value (range: 0<=val<=7fffffff) */
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32 Word32 * frac, /* (i/o) Q31: normalized value (1.0 < frac <= 0.5) */
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33 Word16 * exp /* (i/o) : exponent (value = frac x 2^exponent) */
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36 Word32 Pow2( /* (o) Q0 : result (range: 0<=val<=0x7fffffff) */
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37 Word16 exponant, /* (i) Q0 : Integer part. (range: 0<=val<=30) */
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38 Word16 fraction /* (i) Q15 : Fractionnal part. (range: 0.0<=val<1.0) */
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41 Word32 Dot_product12( /* (o) Q31: normalized result (1 < val <= -1) */
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42 Word16 x[], /* (i) 12bits: x vector */
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43 Word16 y[], /* (i) 12bits: y vector */
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44 Word16 lg, /* (i) : vector length */
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45 Word16 * exp /* (o) : exponent of result (0..+30) */
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48 Word32 Dot_product12_asm( /* (o) Q31: normalized result (1 < val <= -1) */
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49 Word16 x[], /* (i) 12bits: x vector */
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50 Word16 y[], /* (i) 12bits: y vector */
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51 Word16 lg, /* (i) : vector length */
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52 Word16 * exp /* (o) : exponent of result (0..+30) */
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54 #endif //__MATH_OP_H__
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