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-rw-r--r--code/libspeex/filters_bfin.h515
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+/* Copyright (C) 2005 Analog Devices */
+/**
+ @file filters_bfin.h
+ @brief Various analysis/synthesis filters (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_NORMALIZE16
+int normalize16(const spx_sig_t *x, spx_word16_t *y, spx_sig_t max_scale, int len)
+{
+ spx_sig_t max_val=1;
+ int sig_shift;
+ __asm__
+ (
+ "%0 = 0;\n\t"
+ "I0 = %1;\n\t"
+ "L0 = 0;\n\t"
+ "R1 = [I0++];\n\t"
+ "LOOP norm_max%= LC0 = %2;\n\t"
+ "LOOP_BEGIN norm_max%=;\n\t"
+ "R2 = ABS R1 || R1 = [I0++];\n\t"
+ "%0 = MAX(%0, R2);\n\t"
+ "LOOP_END norm_max%=;\n\t"
+ : "=&d" (max_val)
+ : "a" (x), "a" (len)
+ : "R1", "R2"
+ );
+
+ sig_shift=0;
+ while (max_val>max_scale)
+ {
+ sig_shift++;
+ max_val >>= 1;
+ }
+
+ __asm__ __volatile__
+ (
+ "I0 = %0;\n\t"
+ "L0 = 0;\n\t"
+ "P1 = %1;\n\t"
+ "R0 = [I0++];\n\t"
+ "LOOP norm_shift%= LC0 = %3;\n\t"
+ "LOOP_BEGIN norm_shift%=;\n\t"
+ "R1 = ASHIFT R0 by %2.L || R0 = [I0++];\n\t"
+ "W[P1++] = R1;\n\t"
+ "LOOP_END norm_shift%=;\n\t"
+ "R1 = ASHIFT R0 by %2.L;\n\t"
+ "W[P1++] = R1;\n\t"
+ : : "a" (x), "a" (y), "d" (-sig_shift), "a" (len-1)
+ : "I0", "L0", "P1", "R0", "R1", "memory"
+ );
+ return sig_shift;
+}
+
+
+
+#define OVERRIDE_FILTER_MEM16
+void filter_mem16(const spx_word16_t *_x, const spx_coef_t *num, const spx_coef_t *den, spx_word16_t *_y, int N, int ord, spx_mem_t *mem, char *stack)
+{
+ VARDECL(spx_word32_t *xy2);
+ VARDECL(spx_word32_t *numden_a);
+ spx_word32_t *xy;
+ spx_word16_t *numden;
+ int i;
+
+ ALLOC(xy2, (N+1), spx_word32_t);
+ ALLOC(numden_a, (2*ord+2), spx_word32_t);
+ xy = xy2+1;
+ numden = (spx_word16_t*) numden_a;
+
+ for (i=0;i<ord;i++)
+ {
+ numden[2*i] = num[i];
+ numden[2*i+1] = den[i];
+ }
+ __asm__ __volatile__
+ (
+ /* Register setup */
+ "R0 = %5;\n\t" /*ord */
+
+ "P0 = %3;\n\t"
+ "I0 = P0;\n\t"
+ "B0 = P0;\n\t" /* numden */
+ "L0 = 0;\n\t"
+
+ "P2 = %0;\n\t" /* Fused xy */
+ "I2 = P2;\n\t"
+ "L2 = 0;\n\t"
+
+ "P4 = %6;\n\t" /* mem */
+ "P0 = %1;\n\t" /* _x */
+ "P1 = %2;\n\t" /* _y */
+
+ /* First sample */
+ "R1 = [P4++];\n\t"
+ "R1 <<= 3;\n\t" /* shift mem */
+ "R1.L = R1 (RND);\n\t"
+ "R2 = W[P0++];\n\t" /* load x[0] */
+ "R1.L = R1.L + R2.L;\n\t"
+ "W[P1++] = R1;\n\t" /* store y[0] */
+ "R2 = PACK(R1.L, R2.L);\n\t" /* pack x16 and y16 */
+ "[P2] = R2;\n\t"
+
+ /* Samples 1 to ord-1 (using memory) */
+ "R0 += -1;\n\t"
+ "R3 = 0;\n\t"
+ "LC0 = R0;\n\t"
+ "LOOP filter_start%= LC0;\n\t"
+ "LOOP_BEGIN filter_start%=;\n\t"
+ "R3 += 1;\n\t"
+ "LC1 = R3;\n\t"
+
+ "R1 = [P4++];\n\t"
+ "A1 = R1;\n\t"
+ "A0 = 0;\n\t"
+ "I0 = B0;\n\t"
+ "I2 = P2;\n\t"
+ "P2 += 4;\n\t"
+ "R4 = [I0++] || R5 = [I2--];\n\t"
+ "LOOP filter_start_inner%= LC1;\n\t"
+ "LOOP_BEGIN filter_start_inner%=;\n\t"
+ "A1 -= R4.H*R5.H, A0 += R4.L*R5.L (IS) || R4 = [I0++] || R5 = [I2--];\n\t"
+ "LOOP_END filter_start_inner%=;\n\t"
+ "A0 += A1;\n\t"
+ "R4 = A0;\n\t"
+ "R4 <<= 3;\n\t" /* shift mem */
+ "R4.L = R4 (RND);\n\t"
+ "R2 = W[P0++];\n\t" /* load x */
+ "R4.L = R4.L + R2.L;\n\t"
+ "W[P1++] = R4;\n\t" /* store y */
+ //"R4 <<= 2;\n\t"
+ //"R2 <<= 2;\n\t"
+ "R2 = PACK(R4.L, R2.L);\n\t" /* pack x16 and y16 */
+ "[P2] = R2;\n\t"
+
+ "LOOP_END filter_start%=;\n\t"
+
+ /* Samples ord to N*/
+ "R0 = %5;\n\t"
+ "R0 <<= 1;\n\t"
+ "I0 = B0;\n\t" /* numden */
+ "R0 <<= 1;\n\t"
+ "L0 = R0;\n\t"
+
+ "R0 = %5;\n\t" /* org */
+ "R2 = %4;\n\t" /* N */
+ "R2 = R2 - R0;\n\t"
+ "R4 = [I0++];\n\t" /* numden */
+ "LC0 = R2;\n\t"
+ "P3 = R0;\n\t"
+ "R0 <<= 2;\n\t"
+ "R0 += 8;\n\t"
+ "I2 = P2;\n\t"
+ "M0 = R0;\n\t"
+ "A1 = A0 = 0;\n\t"
+ "R5 = [I2--];\n\t" /* load xy */
+ "LOOP filter_mid%= LC0;\n\t"
+ "LOOP_BEGIN filter_mid%=;\n\t"
+ "LOOP filter_mid_inner%= LC1=P3;\n\t"
+ "LOOP_BEGIN filter_mid_inner%=;\n\t"
+ "A1 -= R4.H*R5.H, A0 += R4.L*R5.L (IS) || R4 = [I0++] || R5 = [I2--];\n\t"
+ "LOOP_END filter_mid_inner%=;\n\t"
+ "R0 = (A0 += A1) || I2 += M0;\n\t"
+ "R0 = R0 << 3 || R5 = W[P0++];\n\t" /* load x */
+ "R0.L = R0 (RND);\n\t"
+ "R0.L = R0.L + R5.L;\n\t"
+ "R5 = PACK(R0.L, R5.L) || W[P1++] = R0;\n\t" /* shift y | store y */
+ "A1 = A0 = 0 || [I2--] = R5\n\t"
+ "LOOP_END filter_mid%=;\n\t"
+ "I2 += 4;\n\t"
+ "P2 = I2;\n\t"
+ /* Update memory */
+ "P4 = %6;\n\t"
+ "R0 = %5;\n\t"
+ "LC0 = R0;\n\t"
+ "P0 = B0;\n\t"
+ "A1 = A0 = 0;\n\t"
+ "LOOP mem_update%= LC0;\n\t"
+ "LOOP_BEGIN mem_update%=;\n\t"
+ "I2 = P2;\n\t"
+ "I0 = P0;\n\t"
+ "P0 += 4;\n\t"
+ "R0 = LC0;\n\t"
+ "LC1 = R0;\n\t"
+ "R5 = [I2--] || R4 = [I0++];\n\t"
+ "LOOP mem_accum%= LC1;\n\t"
+ "LOOP_BEGIN mem_accum%=;\n\t"
+ "A1 -= R4.H*R5.H, A0 += R4.L*R5.L (IS) || R4 = [I0++] || R5 = [I2--];\n\t"
+ "LOOP_END mem_accum%=;\n\t"
+ "R0 = (A0 += A1);\n\t"
+ "A1 = A0 = 0 || [P4++] = R0;\n\t"
+ "LOOP_END mem_update%=;\n\t"
+ "L0 = 0;\n\t"
+ : : "m" (xy), "m" (_x), "m" (_y), "m" (numden), "m" (N), "m" (ord), "m" (mem)
+ : "A0", "A1", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1", "P2", "P3", "P4", "B0", "I0", "I2", "L0", "L2", "M0", "memory"
+ );
+
+}
+
+
+
+#define OVERRIDE_IIR_MEM16
+void iir_mem16(const spx_word16_t *_x, const spx_coef_t *den, spx_word16_t *_y, int N, int ord, spx_mem_t *mem, char *stack)
+{
+ VARDECL(spx_word16_t *y);
+ spx_word16_t *yy;
+
+ ALLOC(y, (N+2), spx_word16_t);
+ yy = y+2;
+
+ __asm__ __volatile__
+ (
+ /* Register setup */
+ "R0 = %5;\n\t" /*ord */
+
+ "P1 = %3;\n\t"
+ "I1 = P1;\n\t"
+ "B1 = P1;\n\t"
+ "L1 = 0;\n\t"
+
+ "P3 = %0;\n\t"
+ "I3 = P3;\n\t"
+ "L3 = 0;\n\t"
+
+ "P4 = %6;\n\t"
+ "P0 = %1;\n\t"
+ "P1 = %2;\n\t"
+
+ /* First sample */
+ "R1 = [P4++];\n\t"
+ "R1 = R1 << 3 (S);\n\t"
+ "R1.L = R1 (RND);\n\t"
+ "R2 = W[P0++];\n\t"
+ "R1 = R1 + R2;\n\t"
+ "W[P1++] = R1;\n\t"
+ "W[P3] = R1;\n\t"
+
+ /* Samples 1 to ord-1 (using memory) */
+ "R0 += -1;\n\t"
+ "R3 = 0;\n\t"
+ "LC0 = R0;\n\t"
+ "LOOP filter_start%= LC0;\n\t"
+ "LOOP_BEGIN filter_start%=;\n\t"
+ "R3 += 1;\n\t"
+ "LC1 = R3;\n\t"
+
+ "R1 = [P4++];\n\t"
+ "A1 = R1;\n\t"
+ "I1 = B1;\n\t"
+ "I3 = P3;\n\t"
+ "P3 += 2;\n\t"
+ "LOOP filter_start_inner%= LC1;\n\t"
+ "LOOP_BEGIN filter_start_inner%=;\n\t"
+ "R4.L = W[I1++];\n\t"
+ "R5.L = W[I3--];\n\t"
+ "A1 -= R4.L*R5.L (IS);\n\t"
+ "LOOP_END filter_start_inner%=;\n\t"
+
+ "R1 = A1;\n\t"
+ "R1 <<= 3;\n\t"
+ "R1.L = R1 (RND);\n\t"
+ "R2 = W[P0++];\n\t"
+ "R1 = R1 + R2;\n\t"
+ "W[P1++] = R1;\n\t"
+ "W[P3] = R1;\n\t"
+ "LOOP_END filter_start%=;\n\t"
+
+ /* Samples ord to N*/
+ "R0 = %5;\n\t"
+ "R0 <<= 1;\n\t"
+ "I1 = B1;\n\t"
+ "L1 = R0;\n\t"
+
+ "R0 = %5;\n\t"
+ "R2 = %4;\n\t"
+ "R2 = R2 - R0;\n\t"
+ "R4.L = W[I1++];\n\t"
+ "LC0 = R2;\n\t"
+ "LOOP filter_mid%= LC0;\n\t"
+ "LOOP_BEGIN filter_mid%=;\n\t"
+ "LC1 = R0;\n\t"
+ "A1 = 0;\n\t"
+ "I3 = P3;\n\t"
+ "P3 += 2;\n\t"
+ "R5.L = W[I3--];\n\t"
+ "LOOP filter_mid_inner%= LC1;\n\t"
+ "LOOP_BEGIN filter_mid_inner%=;\n\t"
+ "A1 -= R4.L*R5.L (IS) || R4.L = W[I1++] || R5.L = W[I3--];\n\t"
+ "LOOP_END filter_mid_inner%=;\n\t"
+ "R1 = A1;\n\t"
+ "R1 = R1 << 3 || R2 = W[P0++];\n\t"
+ "R1.L = R1 (RND);\n\t"
+ "R1 = R1 + R2;\n\t"
+ "W[P1++] = R1;\n\t"
+ "W[P3] = R1;\n\t"
+ "LOOP_END filter_mid%=;\n\t"
+
+ /* Update memory */
+ "P4 = %6;\n\t"
+ "R0 = %5;\n\t"
+ "LC0 = R0;\n\t"
+ "P1 = B1;\n\t"
+ "LOOP mem_update%= LC0;\n\t"
+ "LOOP_BEGIN mem_update%=;\n\t"
+ "A0 = 0;\n\t"
+ "I3 = P3;\n\t"
+ "I1 = P1;\n\t"
+ "P1 += 2;\n\t"
+ "R0 = LC0;\n\t"
+ "LC1=R0;\n\t"
+ "R5.L = W[I3--] || R4.L = W[I1++];\n\t"
+ "LOOP mem_accum%= LC1;\n\t"
+ "LOOP_BEGIN mem_accum%=;\n\t"
+ "A0 -= R4.L*R5.L (IS) || R4.L = W[I1++] || R5.L = W[I3--];\n\t"
+ "LOOP_END mem_accum%=;\n\t"
+ "R0 = A0;\n\t"
+ "[P4++] = R0;\n\t"
+ "LOOP_END mem_update%=;\n\t"
+ "L1 = 0;\n\t"
+ : : "m" (yy), "m" (_x), "m" (_y), "m" (den), "m" (N), "m" (ord), "m" (mem)
+ : "A0", "A1", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1", "P2", "P3", "P4", "B1", "I1", "I3", "L1", "L3", "memory"
+ );
+
+}
+
+
+#define OVERRIDE_FIR_MEM16
+void fir_mem16(const spx_word16_t *x, const spx_coef_t *num, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack)
+{
+ int i;
+ spx_coef_t den2[12];
+ spx_coef_t *den;
+ den = (spx_coef_t*)((((int)den2)+4)&0xfffffffc);
+ for (i=0;i<10;i++)
+ den[i] = 0;
+ filter_mem16(x, num, den, y, N, ord, mem, stack);
+}
+
+
+#define OVERRIDE_COMPUTE_IMPULSE_RESPONSE
+void compute_impulse_response(const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack)
+{
+ int i;
+ VARDECL(spx_word16_t *ytmp);
+ ALLOC(ytmp, N, spx_word16_t);
+ spx_word16_t *ytmp2 = ytmp;
+ y[0] = LPC_SCALING;
+ for (i=0;i<ord;i++)
+ y[i+1] = awk1[i];
+ i++;
+ for (;i<N;i++)
+ y[i] = 0;
+
+ N-=1;
+ __asm__ __volatile__
+ (
+ "I0 = %0;\n\t"
+ "I1 = %1;\n\t"
+ "L0 = 0;\n\t"
+ "L1 = 0;\n\t"
+ "L2 = 0;\n\t"
+ "L3 = 0;\n\t"
+ "R0 = 1;\n\t"
+ "R0 <<= 13;\n\t"
+ "W[I0] = R0.L;\n\t"
+ "R0 <<= 1;\n\t"
+ "W[I1] = R0.L;\n\t"
+ "R0 = %5;\n\t"
+ "LC0 = R0;\n\t"
+ "R2 = 0;\n\t"
+ "LOOP samples%= LC0;\n\t"
+ "LOOP_BEGIN samples%=;\n\t"
+ "R2 += 1;\n\t"
+ "R2 = MIN(R2, %4);\n\t"
+ "I0 = %0;\n\t"
+ "I1 = %1;\n\t"
+ "I2 = %2;\n\t"
+ "I3 = %3;\n\t"
+ "%0 += 2;\n\t"
+ "%1 += 2;\n\t"
+ "A1 = A0 = 0;\n\t"
+ "R0.L = W[I0--] || R1.L = W[I2++];\n\t"
+ "LC1 = R2;\n\t"
+ "LOOP filter%= LC1;\n\t"
+ "LOOP_BEGIN filter%=;\n\t"
+ "A0 -= R0.L*R1.L (IS) || R0.L = W[I1--] || R1.L = W[I3++];\n\t"
+ "A1 -= R0.L*R1.L (IS) || R0.L = W[I0--] || R1.L = W[I2++];\n\t"
+ "LOOP_END filter%=;\n\t"
+ "R0 = A0, R1 = A1;\n\t"
+ "R3 = W[%1] (X);\n\t"
+ "R3 <<= 13;\n\t"
+ "R0 = R0 + R3;\n\t"
+ "R3 = R0 >>> 13;\n\t"
+ "W[%0] = R3.L;\n\t"
+ "R0 <<= 1;\n\t"
+ "R1 = R1 + R0;\n\t"
+ "R1 >>>= 13;\n\t"
+ "W[%1] = R1.L;\n\t"
+ "LOOP_END samples%=;\n\t"
+ : "=a" (ytmp2), "=a" (y)
+ : "a" (awk2), "a" (ak), "d" (ord), "m" (N), "0" (ytmp2), "1" (y)
+ : "A0", "A1", "R0", "R1", "R2", "R3", "I0", "I1", "I2", "I3", "L0", "L1", "L2", "L3", "A0", "A1"
+ );
+}
+
+
+
+#if 0 /* Equivalent C function for filter_mem2 and compute_impulse_response */
+#define min(a,b) ((a)<(b) ? (a):(b))
+
+void compute_impulse_response(const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack)
+{
+ int i,j;
+ VARDECL(spx_word16_t *ytmp);
+ ALLOC(ytmp, N, spx_word16_t);
+
+ y[0] = LPC_SCALING;
+ for (i=0;i<ord;i++)
+ y[i+1] = awk1[i];
+ i++;
+ for (;i<N;i++)
+ y[i] = 0;
+
+ for (i=0;i<N;i++)
+ {
+ spx_word32_t yi = SHL32(EXTEND32(y[i]),LPC_SHIFT);
+ spx_word32_t yi2 = 0;
+ for (j=0;j<min(i,ord);j++)
+ {
+ yi = MAC16_16(yi, awk2[j], -ytmp[i-j-1]);
+ yi2 = MAC16_16(yi2, ak[j], -y[i-j-1]);
+ }
+ ytmp[i] = EXTRACT16(SHR32(yi,LPC_SHIFT));
+ yi2 = ADD32(yi2,SHL32(yi,1));
+ y[i] = EXTRACT16(SHR32(yi2,LPC_SHIFT));
+ }
+
+}
+
+
+void filter_mem2(const spx_sig_t *_x, const spx_coef_t *num, const spx_coef_t *den, spx_sig_t *_y, int N, int ord, spx_mem_t *mem)
+{
+ int i,j;
+ spx_word16_t xi,yi,nyi;
+ spx_word16_t x[N],y[N];
+ spx_word16_t *xx, *yy;
+ xx = x;
+ yy = y;
+ for (i=0;i<N;i++)
+ {
+ x[i] = EXTRACT16(SHR32(_x[i],SIG_SHIFT));
+ }
+
+ for (i=0;i<ord;i++)
+ {
+ spx_word32_t yi = mem[i];
+ for (j=0;j<i;j++)
+ {
+ yi = MAC16_16(yi, num[j], x[i-j-1]);
+ yi = MAC16_16(yi, den[j], -y[i-j-1]);
+ }
+ _y[i] = ADD32(_x[i],SHL32(yi,1));
+ y[i] = EXTRACT16(SHR32(_y[i],SIG_SHIFT));
+ }
+ for (i=ord;i<N;i++)
+ {
+ spx_word32_t yi = 0;
+ for (j=0;j<ord;j++)
+ {
+ yi = MAC16_16(yi, num[j], x[i-j-1]);
+ yi = MAC16_16(yi, den[j], -y[i-j-1]);
+ }
+ _y[i] = ADD32(_x[i],SHL32(yi,1));
+ y[i] = EXTRACT16(SHR32(_y[i],SIG_SHIFT));
+ }
+
+ for (i=0;i<ord;i++)
+ {
+ spx_mem_t m = 0;
+ for (j=0;j<ord-i;j++)
+ {
+ m = MAC16_16(m, x[N-1-j], num[j+i]);
+ m = MAC16_16(m, -y[N-1-j], den[j+i]);
+ }
+ mem[i] = m;
+ }
+}
+#endif