| /* |
| ** Copyright 2003-2010, VisualOn, Inc. |
| ** |
| ** Licensed under the Apache License, Version 2.0 (the "License"); |
| ** you may not use this file except in compliance with the License. |
| ** You may obtain a copy of the License at |
| ** |
| ** http://www.apache.org/licenses/LICENSE-2.0 |
| ** |
| ** Unless required by applicable law or agreed to in writing, software |
| ** distributed under the License is distributed on an "AS IS" BASIS, |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ** See the License for the specific language governing permissions and |
| ** limitations under the License. |
| */ |
| |
| |
| /*--------------------------------------------------------------------------* |
| * MATH_OP.H * |
| *--------------------------------------------------------------------------* |
| * Mathematical operations * |
| *--------------------------------------------------------------------------*/ |
| |
| #ifndef __MATH_OP_H__ |
| #define __MATH_OP_H__ |
| |
| Word32 Isqrt( /* (o) Q31 : output value (range: 0<=val<1) */ |
| Word32 L_x /* (i) Q0 : input value (range: 0<=val<=7fffffff) */ |
| ); |
| |
| void Isqrt_n( |
| Word32 * frac, /* (i/o) Q31: normalized value (1.0 < frac <= 0.5) */ |
| Word16 * exp /* (i/o) : exponent (value = frac x 2^exponent) */ |
| ); |
| |
| Word32 Pow2( /* (o) Q0 : result (range: 0<=val<=0x7fffffff) */ |
| Word16 exponant, /* (i) Q0 : Integer part. (range: 0<=val<=30) */ |
| Word16 fraction /* (i) Q15 : Fractionnal part. (range: 0.0<=val<1.0) */ |
| ); |
| |
| Word32 Dot_product12( /* (o) Q31: normalized result (1 < val <= -1) */ |
| Word16 x[], /* (i) 12bits: x vector */ |
| Word16 y[], /* (i) 12bits: y vector */ |
| Word16 lg, /* (i) : vector length */ |
| Word16 * exp /* (o) : exponent of result (0..+30) */ |
| ); |
| |
| Word32 Dot_product12_asm( /* (o) Q31: normalized result (1 < val <= -1) */ |
| Word16 x[], /* (i) 12bits: x vector */ |
| Word16 y[], /* (i) 12bits: y vector */ |
| Word16 lg, /* (i) : vector length */ |
| Word16 * exp /* (o) : exponent of result (0..+30) */ |
| ); |
| #endif //__MATH_OP_H__ |
| |