1 /* Copyright (C) 2004 Jean-Marc Valin */
4 @brief ARM4-optimized vq routine
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8 modification, are permitted provided that the following conditions
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23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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35 #define OVERRIDE_VQ_NBEST
36 void vq_nbest(spx_word16_t *in, const spx_word16_t *codebook, int len, int entries, spx_word32_t *E, int N, int *nbest, spx_word32_t *best_dist, char *stack)
39 for (i=0;i<entries;i+=4)
42 spx_word32_t dist1, dist2, dist3, dist4;
43 int dead1, dead2, dead3, dead4, dead5, dead6, dead7, dead8;
44 __asm__ __volatile__ (
52 "ldrsh %7, [%5], #2 \n\t"
55 "mla %0, %7, %8, %0 \n\t"
56 "ldrsh %8, [%9, %4]! \n\t"
57 "mla %1, %7, %8, %1 \n\t"
58 "ldrsh %8, [%9, %4]!\n\t"
59 "mla %2, %7, %8, %2 \n\t"
60 "ldrsh %8, [%9, %4]! \n\t"
61 "mla %3, %7, %8, %3 \n\t"
62 "subs %10, %10, #1 \n\t"
65 : "=r" (dist1), "=r" (dist2), "=r" (dist3), "=r" (dist4),
66 "=r" (dead1), "=r" (dead2), "=r" (codebook), "=r" (dead4),
67 "=r" (dead5), "=r" (dead6), "=r" (dead7)
68 : "4" (len), "5" (in), "6" (codebook)
71 dist1=dist2=dist3=dist4=0;
72 /* spx_word32_t dist1=0;
75 spx_word32_t dist4=0;*/
78 const spx_word16_t *code = codebook;
79 dist1 = MAC16_16(dist1,in[j],*code);
81 dist2 = MAC16_16(dist2,in[j],*code);
83 dist3 = MAC16_16(dist3,in[j],*code);
85 dist4 = MAC16_16(dist4,in[j],*code);
89 dist1=SUB32(SHR(*E++,1),dist1);
90 if (dist1<*best_dist || i==0)
95 dist2=SUB32(SHR(*E++,1),dist2);
101 dist3=SUB32(SHR(*E++,1),dist3);
102 if (dist3<*best_dist)
107 dist4=SUB32(SHR(*E++,1),dist4);
108 if (dist4<*best_dist)