Prepare to convert various types to size_t.

webrtc/modules/audio_coding/codecs/isac/fix/source/lattice_armv7.S

 @
 @ Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 @
 @ Use of this source code is governed by a BSD-style license
 @ that can be found in the LICENSE file in the root of the source
 @ tree. An additional intellectual property rights grant can be found
 @ in the file PATENTS.  All contributing project authors may
 @ be found in the AUTHORS file in the root of the source tree.
 @
 
@@ skipping 28 matching lines @@
   sub     r4, #1                 @ Outer loop counter = HALF_SUBFRAMELEN - 1
 
 HALF_SUBFRAME_LOOP:  @ for(n = 0; n < HALF_SUBFRAMELEN - 1; n++)
 
   ldr     r9, [sp, #32]          @ Restore the inner loop counter to order_coef
   ldrh    r5, [r1]               @ tmpAR = ar_f_Q0[n+1]
   add     r0, r9, asl #1         @ Restore r0 to &ar_g_Q0[order_coef]
   add     r2, r9, asl #1         @ Restore r2 to &cth_Q15[order_coef]
   add     r3, r9, asl #1         @ Restore r3 to &sth_Q15[order_coef]
 
-ORDER_COEF_LOOP:  @ for(k = order_coef - 1 ; k >= 0; k--)
+ORDER_COEF_LOOP:  @ for(k = order_coef ; k > 0; k--)
 
-  ldrh    r7, [r3, #-2]!         @ sth_Q15[k]
-  ldrh    r6, [r2, #-2]!         @ cth_Q15[k]
+  ldrh    r7, [r3, #-2]!         @ sth_Q15[k - 1]
+  ldrh    r6, [r2, #-2]!         @ cth_Q15[k - 1]
 
-  ldrh    r8, [r0, #-2]          @ ar_g_Q0[k]
-  smlabb  r11, r7, r5, r12       @ sth_Q15[k] * tmpAR + 16384
-  smlabb  r10, r6, r5, r12       @ cth_Q15[k] * tmpAR + 16384
-  smulbb  r7, r7, r8             @ sth_Q15[k] * ar_g_Q0[k]
-  smlabb  r11, r6, r8, r11       @ cth_Q15[k]*ar_g_Q0[k]+(sth_Q15[k]*tmpAR+16384)
+  ldrh    r8, [r0, #-2]          @ ar_g_Q0[k - 1]
+  smlabb  r11, r7, r5, r12       @ sth_Q15[k - 1] * tmpAR + 16384
+  smlabb  r10, r6, r5, r12       @ cth_Q15[k - 1] * tmpAR + 16384
+  smulbb  r7, r7, r8             @ sth_Q15[k - 1] * ar_g_Q0[k - 1]
+  smlabb  r11, r6, r8, r11       @ cth_Q15[k - 1]*ar_g_Q0[k - 1]+(sth_Q15[k - 1]*tmpAR+16384)
 
-  sub     r10, r10, r7           @ cth_Q15[k]*tmpAR+16384-(sth_Q15[k]*ar_g_Q0[k])
+  sub     r10, r10, r7           @ cth_Q15[k - 1]*tmpAR+16384-(sth_Q15[k - 1]*ar_g_Q0[k - 1])
   ssat    r11, #16, r11, asr #15
   ssat    r5, #16, r10, asr #15
-  strh    r11, [r0], #-2         @ Output: ar_g_Q0[k+1]
+  strh    r11, [r0], #-2         @ Output: ar_g_Q0[k]
 
   subs    r9, #1
   bgt     ORDER_COEF_LOOP
 
   strh    r5, [r0]               @ Output: ar_g_Q0[0] = tmpAR;
   strh    r5, [r1], #2           @ Output: ar_f_Q0[n+1] = tmpAR;
 
   subs    r4, #1
   bne     HALF_SUBFRAME_LOOP
 
   pop     {r4-r11}
   bx      lr