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+/* Copyright (C) 2005 Analog Devices */
+/**
+ @author Jean-Marc Valin
+ @file cb_search_bfin.h
+ @brief 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;\n\t"
+ "LC0 = P0;\n\t"
+ "P1 = %1;\n\t"
+ "P2 = %2;\n\t"
+ "P3 = %3;\n\t"
+ "P0 = 1;\n\t"
+ "L0 = 0;\n\t"
+ "L1 = 0;\n\t"
+ "R2 = 0;\n\t"
+ "A1 = 0;\n\t"
+ "LOOP outter%= LC0;\n\t"
+ "LOOP_BEGIN outter%=;\n\t"
+ "A0 = 0;\n\t"
+ "P4 = P1;\n\t"
+ "I1 = P2;\n\t"
+ "R0 = B[P4++] (X) || R1.L = W[I1--];\n\t"
+ "LOOP inner%= LC1 = P0;\n\t"
+ "LOOP_BEGIN inner%=;\n\t"
+ "A0 += R0.L*R1.L (IS) || R0 = B[P4++] (X) || R1.L = W[I1--];\n\t"
+ "LOOP_END inner%=;\n\t"
+ "R0 = A0;\n\t"
+ "R0 >>>= 13;\n\t"
+ "A1 += R0.L*R0.L (IS);\n\t"
+ "W[P3++] = R0;\n\t"
+ "P0 += 1;\n\t"
+ "P2 += 2;\n\t"
+ "LOOP_END outter%=;\n\t"
+ "P4 = %4;\n\t"
+ "R1 = A1;\n\t"
+ "[P4] = R1;\n\t"
+ :
+ : "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"
+#if !(__GNUC__ == 3)
+ , "LC0", "LC1" /* gcc 3.4 doesn't know about LC registers */
+#endif
+ );
+ 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)
+{
+ if (!len)
+ return;
+ __asm__ __volatile__
+ (
+ "I0 = %0;\n\t"
+ "I1 = %1;\n\t"
+ "L0 = 0;\n\t"
+ "L1 = 0;\n\t"
+ "R2 = 4096;\n\t"
+ "LOOP tupdate%= LC0 = %3;\n\t"
+ "LOOP_BEGIN tupdate%=;\n\t"
+ "R0.L = W[I0] || R1.L = W[I1++];\n\t"
+ "R1 = (A1 = R1.L*%2.L) (IS);\n\t"
+ "R1 = R1 + R2;\n\t"
+ "R1 >>>= 13;\n\t"
+ "R0.L = R0.L - R1.L;\n\t"
+ "W[I0++] = R0.L;\n\t"
+ "LOOP_END tupdate%=;\n\t"
+ :
+ : "a" (t), "a" (r), "d" (g), "a" (len)
+ : "R0", "R1", "R2", "A1", "I0", "I1", "L0", "L1"
+ );
+}