Diff: DuerOS-Light-SDK-v1.1.0/duer-os-light/external/speex/libspeex/lsp_bfin.h

Revision:

47:9e361da97763

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DuerOS-Light-SDK-v1.1.0/duer-os-light/external/speex/libspeex/lsp_bfin.h	Tue Jul 18 16:54:45 2017 +0800
@@ -0,0 +1,89 @@
+/* Copyright (C) 2006 David Rowe */
+/**
+   @file lsp_bfin.h
+   @author David Rowe
+   @brief LSP routines optimised for the Blackfin
+*/
+/*
+   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_CHEB_POLY_EVA
+#ifdef OVERRIDE_CHEB_POLY_EVA
+static inline spx_word32_t cheb_poly_eva(
+  spx_word16_t *coef, /* P or Q coefs in Q13 format               */
+  spx_word16_t     x, /* cos of freq (-1.0 to 1.0) in Q14 format  */
+  int              m, /* LPC order/2                              */
+  char         *stack
+)
+{
+    spx_word32_t sum;
+
+   __asm__ __volatile__
+     (
+      "P0 = %2;\n\t"           /* P0: coef[m], coef[m-1],..., coef[0] */
+      "R4 = 8192;\n\t"         /* R4: rounding constant               */
+      "R2 = %1;\n\t"           /* R2: x  */
+
+      "R5 = -16383;\n\t"
+      "R2 = MAX(R2,R5);\n\t"
+      "R5 = 16383;\n\t"
+      "R2 = MIN(R2,R5);\n\t"
+
+      "R3 = W[P0--] (X);\n\t"  /* R3: sum */
+      "R5 = W[P0--] (X);\n\t"
+      "R5 = R5.L * R2.L (IS);\n\t"
+      "R5 = R5 + R4;\n\t"
+      "R5 >>>= 14;\n\t"
+      "R3 = R3 + R5;\n\t" 
+      
+      "R0 = R2;\n\t"           /* R0: b0 */
+      "R1 = 16384;\n\t"        /* R1: b1 */
+      "LOOP cpe%= LC0 = %3;\n\t"
+      "LOOP_BEGIN cpe%=;\n\t"
+        "P1 = R0;\n\t" 
+        "R0 = R2.L * R0.L (IS) || R5 = W[P0--] (X);\n\t"
+        "R0 >>>= 13;\n\t"
+        "R0 = R0 - R1;\n\t"
+        "R1 = P1;\n\t"
+        "R5 = R5.L * R0.L (IS);\n\t"
+        "R5 = R5 + R4;\n\t"
+        "R5 >>>= 14;\n\t"
+        "R3 = R3 + R5;\n\t"
+      "LOOP_END cpe%=;\n\t"
+      "%0 = R3;\n\t"
+      : "=&d" (sum)
+      : "a" (x), "a" (&coef[m]), "a" (m-1)
+      : "R0", "R1", "R3", "R2", "R4", "R5", "P0", "P1"
+      );
+    return sum;
+}
+#endif
+
+
+