cb_search_bfin.h
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:4k
源码类别:
Windows CE
开发平台:
C/C++
- /* Copyright (C) 2005 Analog Devices
- Author: Jean-Marc Valin
- File: cb_search_bfin.h
- Fixed codebook functions (Blackfin version)
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- - Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- - Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- - Neither the name of the Xiph.org Foundation nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #define OVERRIDE_COMPUTE_WEIGHTED_CODEBOOK
- void compute_weighted_codebook(const signed char *shape_cb, const spx_word16_t *r, spx_word16_t *resp, spx_word16_t *resp2, spx_word32_t *E, int shape_cb_size, int subvect_size, char *stack)
- {
- int i;
- for (i=0;i<shape_cb_size;i++)
- {
- __asm__ __volatile__ (
- "P0 = %0;nt"
- "LC0 = P0;nt"
- "P1 = %1;nt"
- "P2 = %2;nt"
- "P3 = %3;nt"
- "P0 = 1;nt"
- "L0 = 0;nt"
- "L1 = 0;nt"
- "R2 = 0;nt"
- "A1 = 0;nt"
- "LOOP outter%= LC0;nt"
- "LOOP_BEGIN outter%=;nt"
- "A0 = 0;nt"
- "P4 = P1;nt"
- "I1 = P2;nt"
- "R0 = B[P4++] (X) || R1.L = W[I1--];nt"
- "LOOP inner%= LC1 = P0;nt"
- "LOOP_BEGIN inner%=;nt"
- "A0 += R0.L*R1.L (IS) || R0 = B[P4++] (X) || R1.L = W[I1--];nt"
- "LOOP_END inner%=;nt"
- "R0 = A0;nt"
- "R0 >>>= 11;nt"
- "A1 += R0.L*R0.L (IS);nt"
- "W[P3++] = R0;nt"
- "P0 += 1;nt"
- "P2 += 2;nt"
- "LOOP_END outter%=;nt"
- "P4 = %4;nt"
- "R1 = A1;nt"
- "[P4] = R1;nt"
- :
- : "m" (subvect_size), "m" (shape_cb), "m" (r), "m" (resp), "m" (E)
- : "A0", "P0", "P1", "P2", "P3", "P4", "R0", "R1", "R2", "I0", "I1", "L0", "L1", "A0", "A1", "memory"
- );
- shape_cb += subvect_size;
- resp += subvect_size;
- E++;
- }
- }
- #define OVERRIDE_TARGET_UPDATE
- static inline void target_update(spx_word16_t *t, spx_word16_t g, spx_word16_t *r, int len)
- {
- __asm__ __volatile__
- (
- "I0 = %0;nt"
- "I1 = %1;nt"
- "L0 = 0;nt"
- "L1 = 0;nt"
- "LOOP tupdate%= LC0 = %3;nt"
- "LOOP_BEGIN tupdate%=;nt"
- "R0.L = W[I0] || R1.L = W[I1++];nt"
- "R1 = (A1 = R1.L*%2.L) (IS);nt"
- "R1 >>>= 11;nt"
- "R0.L = R0.L - R1.L;nt"
- "W[I0++] = R0.L;nt"
- "LOOP_END tupdate%=;nt"
- :
- : "a" (t), "a" (r), "d" (g), "a" (len)
- : "R0", "R1", "A1", "I0", "I1", "L0", "L1"
- );
- }