166 lines
5.4 KiB
C
166 lines
5.4 KiB
C
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/* Copyright (C) 2006 David Rowe */
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/**
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@file quant_lsp_bfin.h
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@author David Rowe
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@brief Various compatibility routines for Speex (Blackfin version)
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*/
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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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- 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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- 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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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define OVERRIDE_LSP_QUANT
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#ifdef OVERRIDE_LSP_QUANT
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/*
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Note http://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html
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well tell you all the magic resgister constraints used below
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for gcc in-line asm.
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*/
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static int lsp_quant(
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spx_word16_t *x,
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const signed char *cdbk,
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int nbVec,
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int nbDim
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)
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{
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int j;
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spx_word32_t best_dist=1<<30;
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int best_id=0;
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__asm__ __volatile__
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(
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" %0 = 1 (X);\n\t" /* %0: best_dist */
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" %0 <<= 30;\n\t"
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" %1 = 0 (X);\n\t" /* %1: best_i */
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" P2 = %3\n\t" /* P2: ptr to cdbk */
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" R5 = 0;\n\t" /* R5: best cb entry */
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" R0 = %5;\n\t" /* set up circ addr */
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" R0 <<= 1;\n\t"
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" L0 = R0;\n\t"
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" I0 = %2;\n\t" /* %2: &x[0] */
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" B0 = %2;\n\t"
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" R2.L = W [I0++];\n\t"
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" LSETUP (1f, 2f) LC0 = %4;\n\t"
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"1: R3 = 0;\n\t" /* R3: dist */
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" LSETUP (3f, 4f) LC1 = %5;\n\t"
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"3: R1 = B [P2++] (X);\n\t"
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" R1 <<= 5;\n\t"
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" R0.L = R2.L - R1.L || R2.L = W [I0++];\n\t"
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" R0 = R0.L*R0.L;\n\t"
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"4: R3 = R3 + R0;\n\t"
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" cc =R3<%0;\n\t"
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" if cc %0=R3;\n\t"
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" if cc %1=R5;\n\t"
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"2: R5 += 1;\n\t"
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" L0 = 0;\n\t"
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: "=&d" (best_dist), "=&d" (best_id)
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: "a" (x), "b" (cdbk), "a" (nbVec), "a" (nbDim)
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: "I0", "P2", "R0", "R1", "R2", "R3", "R5", "L0", "B0", "A0"
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);
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for (j=0;j<nbDim;j++) {
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x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
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}
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return best_id;
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}
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#endif
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#define OVERRIDE_LSP_WEIGHT_QUANT
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#ifdef OVERRIDE_LSP_WEIGHT_QUANT
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/*
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Note http://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html
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well tell you all the magic resgister constraints used below
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for gcc in-line asm.
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*/
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static int lsp_weight_quant(
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spx_word16_t *x,
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spx_word16_t *weight,
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const signed char *cdbk,
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int nbVec,
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int nbDim
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)
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{
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int j;
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spx_word32_t best_dist=1<<30;
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int best_id=0;
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__asm__ __volatile__
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(
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" %0 = 1 (X);\n\t" /* %0: best_dist */
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" %0 <<= 30;\n\t"
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" %1 = 0 (X);\n\t" /* %1: best_i */
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" P2 = %4\n\t" /* P2: ptr to cdbk */
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" R5 = 0;\n\t" /* R5: best cb entry */
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" R0 = %6;\n\t" /* set up circ addr */
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" R0 <<= 1;\n\t"
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" L0 = R0;\n\t"
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" L1 = R0;\n\t"
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" I0 = %2;\n\t" /* %2: &x[0] */
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" I1 = %3;\n\t" /* %3: &weight[0] */
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" B0 = %2;\n\t"
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" B1 = %3;\n\t"
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" LSETUP (1f, 2f) LC0 = %5;\n\t"
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"1: R3 = 0 (X);\n\t" /* R3: dist */
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" LSETUP (3f, 4f) LC1 = %6;\n\t"
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"3: R0.L = W [I0++] || R2.L = W [I1++];\n\t"
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" R1 = B [P2++] (X);\n\t"
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" R1 <<= 5;\n\t"
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" R0.L = R0.L - R1.L;\n\t"
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" R0 = R0.L*R0.L;\n\t"
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" A1 = R2.L*R0.L (M,IS);\n\t"
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" A1 = A1 >>> 16;\n\t"
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" R1 = (A1 += R2.L*R0.H) (IS);\n\t"
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"4: R3 = R3 + R1;\n\t"
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" cc =R3<%0;\n\t"
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" if cc %0=R3;\n\t"
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" if cc %1=R5;\n\t"
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"2: R5 += 1;\n\t"
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" L0 = 0;\n\t"
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" L1 = 0;\n\t"
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: "=&d" (best_dist), "=&d" (best_id)
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: "a" (x), "a" (weight), "b" (cdbk), "a" (nbVec), "a" (nbDim)
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: "I0", "I1", "P2", "R0", "R1", "R2", "R3", "R5", "A1",
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"L0", "L1", "B0", "B1"
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);
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for (j=0;j<nbDim;j++) {
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x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
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}
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return best_id;
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}
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#endif
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