Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/vp8/common/arm/armv6/sixtappredict8x4_v6.asm

 ;
 ;  Copyright (c) 2010 The WebM 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 14 matching lines @@
 ;and the result is stored in transpose.
 |vp8_sixtap_predict8x4_armv6| PROC
     stmdb       sp!, {r4 - r11, lr}
     str         r3, [sp, #-184]!            ;reserve space on stack for temporary storage, store yoffset
 
     cmp         r2, #0                      ;skip first_pass filter if xoffset=0
     add         lr, sp, #4                  ;point to temporary buffer
     beq         skip_firstpass_filter
 
 ;first-pass filter
-    ldr         r12, _filter8_coeff_
+    adr         r12, filter8_coeff
     sub         r0, r0, r1, lsl #1
 
+    add         r3, r1, #10                 ; preload next low
+    pld         [r0, r3]
+
     add         r2, r12, r2, lsl #4         ;calculate filter location
     add         r0, r0, #3                  ;adjust src only for loading convinience
 
     ldr         r3, [r2]                    ; load up packed filter coefficients
     ldr         r4, [r2, #4]
     ldr         r5, [r2, #8]
 
     mov         r2, #0x90000                ; height=9 is top part of counter
 
     sub         r1, r1, #8
@@ skipping 55 matching lines @@
     ;pld        [src, ppl]
     ;;pld       [src, r9]
     ;;ENDIF
 
     subs        r2, r2, #0x10000
 
     sub         lr, lr, #158
 
     add         r0, r0, r1                  ; move to next input line
 
+    add         r11, r1, #18                ; preload next low. adding back block width(=8), which is subtracted earlier
+    pld         [r0, r11]
+
     bne         first_pass_hloop_v6
 
 ;second pass filter
 secondpass_filter
     ldr         r3, [sp], #4                ; load back yoffset
     ldr         r0, [sp, #216]              ; load dst address from stack 180+36
     ldr         r1, [sp, #220]              ; load dst stride from stack 180+40
 
     cmp         r3, #0
     beq         skip_secondpass_filter
 
-    ldr         r12, _filter8_coeff_
+    adr         r12, filter8_coeff
     add         lr, r12, r3, lsl #4         ;calculate filter location
 
     mov         r2, #0x00080000
 
     ldr         r3, [lr]                    ; load up packed filter coefficients
     ldr         r4, [lr, #4]
     ldr         r5, [lr, #8]
 
     pkhbt       r12, r4, r3                 ; pack the filter differently
     pkhbt       r11, r5, r4
@@ skipping 103 matching lines @@
 
     add         sp, sp, #16                 ; 180 - (160 +4)
 
     ldmia       sp!, {r4 - r11, pc}
 
     ENDP
 
 ;-----------------
 ;One word each is reserved. Label filter_coeff can be used to access the data.
 ;Data address: filter_coeff, filter_coeff+4, filter_coeff+8 ...
-_filter8_coeff_
-    DCD     filter8_coeff
 filter8_coeff
     DCD     0x00000000,     0x00000080,     0x00000000,     0x00000000
     DCD     0xfffa0000,     0x000c007b,     0x0000ffff,     0x00000000
     DCD     0xfff50002,     0x0024006c,     0x0001fff8,     0x00000000
     DCD     0xfff70000,     0x0032005d,     0x0000fffa,     0x00000000
     DCD     0xfff00003,     0x004d004d,     0x0003fff0,     0x00000000
     DCD     0xfffa0000,     0x005d0032,     0x0000fff7,     0x00000000
     DCD     0xfff80001,     0x006c0024,     0x0002fff5,     0x00000000
     DCD     0xffff0000,     0x007b000c,     0x0000fffa,     0x00000000
 
     ;DCD        0,  0,  128,    0,   0,  0
     ;DCD        0, -6,  123,   12,  -1,  0
     ;DCD        2, -11, 108,   36,  -8,  1
     ;DCD        0, -9,   93,   50,  -6,  0
     ;DCD        3, -16,  77,   77, -16,  3
     ;DCD        0, -6,   50,   93,  -9,  0
     ;DCD        1, -8,   36,  108, -11,  2
     ;DCD        0, -1,   12,  123,  -6,  0
 
     END