summaryrefslogtreecommitdiff
path: root/src/libspeex/vq_arm4.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/libspeex/vq_arm4.h')
-rw-r--r--src/libspeex/vq_arm4.h115
1 files changed, 115 insertions, 0 deletions
diff --git a/src/libspeex/vq_arm4.h b/src/libspeex/vq_arm4.h
new file mode 100644
index 0000000..585b861
--- /dev/null
+++ b/src/libspeex/vq_arm4.h
@@ -0,0 +1,115 @@
+/* Copyright (C) 2004 Jean-Marc Valin */
+/**
+ @file vq_arm4.h
+ @brief ARM4-optimized vq routine
+*/
+/*
+ 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_VQ_NBEST
+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)
+{
+ int i,j;
+ for (i=0;i<entries;i+=4)
+ {
+#if 1
+ spx_word32_t dist1, dist2, dist3, dist4;
+ int dead1, dead2, dead3, dead4, dead5, dead6, dead7, dead8;
+ __asm__ __volatile__ (
+ "mov %0, #0 \n\t"
+ "mov %1, #0 \n\t"
+ "mov %2, #0 \n\t"
+ "mov %3, #0 \n\t"
+ "mov %10, %4 \n\t"
+ "add %4, %4, %4\n\t"
+ ".vqloop%=:\n\t"
+ "ldrsh %7, [%5], #2 \n\t"
+ "ldrsh %8, [%6] \n\t"
+ "mov %9, %6 \n\t"
+ "mla %0, %7, %8, %0 \n\t"
+ "ldrsh %8, [%9, %4]! \n\t"
+ "mla %1, %7, %8, %1 \n\t"
+ "ldrsh %8, [%9, %4]!\n\t"
+ "mla %2, %7, %8, %2 \n\t"
+ "ldrsh %8, [%9, %4]! \n\t"
+ "mla %3, %7, %8, %3 \n\t"
+ "subs %10, %10, #1 \n\t"
+ "add %6, %6, #2 \n\t"
+ "bne .vqloop%="
+ : "=r" (dist1), "=r" (dist2), "=r" (dist3), "=r" (dist4),
+ "=r" (dead1), "=r" (dead2), "=r" (codebook), "=r" (dead4),
+ "=r" (dead5), "=r" (dead6), "=r" (dead7)
+ : "4" (len), "5" (in), "6" (codebook)
+ : "cc");
+#else
+dist1=dist2=dist3=dist4=0;
+ /* spx_word32_t dist1=0;
+ spx_word32_t dist2=0;
+ spx_word32_t dist3=0;
+ spx_word32_t dist4=0;*/
+ for (j=0;j<2;j++)
+ {
+ const spx_word16_t *code = codebook;
+ dist1 = MAC16_16(dist1,in[j],*code);
+ code += len;
+ dist2 = MAC16_16(dist2,in[j],*code);
+ code += len;
+ dist3 = MAC16_16(dist3,in[j],*code);
+ code += len;
+ dist4 = MAC16_16(dist4,in[j],*code);
+ codebook++;
+ }
+#endif
+ dist1=SUB32(SHR(*E++,1),dist1);
+ if (dist1<*best_dist || i==0)
+ {
+ *best_dist=dist1;
+ *nbest=i;
+ }
+ dist2=SUB32(SHR(*E++,1),dist2);
+ if (dist2<*best_dist)
+ {
+ *best_dist=dist2;
+ *nbest=i+1;
+ }
+ dist3=SUB32(SHR(*E++,1),dist3);
+ if (dist3<*best_dist)
+ {
+ *best_dist=dist3;
+ *nbest=i+2;
+ }
+ dist4=SUB32(SHR(*E++,1),dist4);
+ if (dist4<*best_dist)
+ {
+ *best_dist=dist4;
+ *nbest=i+3;
+ }
+ codebook += 3*len;
+ }
+}