1 ; 2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license 5 ; that can be found in the LICENSE file in the root of the source 6 ; tree. An additional intellectual property rights grant can be found 7 ; in the file PATENTS. All contributing project authors may 8 ; be found in the AUTHORS file in the root of the source tree. 9 ; 10 11 EXPORT |vp8_short_inv_walsh4x4_v6| 12 EXPORT |vp8_short_inv_walsh4x4_1_v6| 13 14 ARM 15 REQUIRE8 16 PRESERVE8 17 18 AREA |.text|, CODE, READONLY ; name this block of code 19 20 ;short vp8_short_inv_walsh4x4_v6(short *input, short *output) 21 |vp8_short_inv_walsh4x4_v6| PROC 22 23 stmdb sp!, {r4 - r11, lr} 24 25 ldr r2, [r0], #4 ; [1 | 0] 26 ldr r3, [r0], #4 ; [3 | 2] 27 ldr r4, [r0], #4 ; [5 | 4] 28 ldr r5, [r0], #4 ; [7 | 6] 29 ldr r6, [r0], #4 ; [9 | 8] 30 ldr r7, [r0], #4 ; [11 | 10] 31 ldr r8, [r0], #4 ; [13 | 12] 32 ldr r9, [r0] ; [15 | 14] 33 34 qadd16 r10, r2, r8 ; a1 [1+13 | 0+12] 35 qadd16 r11, r4, r6 ; b1 [5+9 | 4+8] 36 qsub16 r12, r4, r6 ; c1 [5-9 | 4-8] 37 qsub16 lr, r2, r8 ; d1 [1-13 | 0-12] 38 39 qadd16 r2, r10, r11 ; a1 + b1 [1 | 0] 40 qadd16 r4, r12, lr ; c1 + d1 [5 | 4] 41 qsub16 r6, r10, r11 ; a1 - b1 [9 | 8] 42 qsub16 r8, lr, r12 ; d1 - c1 [13 | 12] 43 44 qadd16 r10, r3, r9 ; a1 [3+15 | 2+14] 45 qadd16 r11, r5, r7 ; b1 [7+11 | 6+10] 46 qsub16 r12, r5, r7 ; c1 [7-11 | 6-10] 47 qsub16 lr, r3, r9 ; d1 [3-15 | 2-14] 48 49 qadd16 r3, r10, r11 ; a1 + b1 [3 | 2] 50 qadd16 r5, r12, lr ; c1 + d1 [7 | 6] 51 qsub16 r7, r10, r11 ; a1 - b1 [11 | 10] 52 qsub16 r9, lr, r12 ; d1 - c1 [15 | 14] 53 54 ; first transform complete 55 56 qsubaddx r10, r2, r3 ; [c1|a1] [1-2 | 0+3] 57 qaddsubx r11, r2, r3 ; [b1|d1] [1+2 | 0-3] 58 qsubaddx r12, r4, r5 ; [c1|a1] [5-6 | 4+7] 59 qaddsubx lr, r4, r5 ; [b1|d1] [5+6 | 4-7] 60 61 qaddsubx r2, r10, r11 ; [b2|c2] [c1+d1 | a1-b1] 62 qaddsubx r3, r11, r10 ; [a2|d2] [b1+a1 | d1-c1] 63 ldr r10, c0x00030003 64 qaddsubx r4, r12, lr ; [b2|c2] [c1+d1 | a1-b1] 65 qaddsubx r5, lr, r12 ; [a2|d2] [b1+a1 | d1-c1] 66 67 qadd16 r2, r2, r10 ; [b2+3|c2+3] 68 qadd16 r3, r3, r10 ; [a2+3|d2+3] 69 qadd16 r4, r4, r10 ; [b2+3|c2+3] 70 qadd16 r5, r5, r10 ; [a2+3|d2+3] 71 72 asr r12, r2, #3 ; [1 | x] 73 pkhtb r12, r12, r3, asr #19; [1 | 0] 74 lsl lr, r3, #16 ; [~3 | x] 75 lsl r2, r2, #16 ; [~2 | x] 76 asr lr, lr, #3 ; [3 | x] 77 pkhtb lr, lr, r2, asr #19 ; [3 | 2] 78 79 asr r2, r4, #3 ; [5 | x] 80 pkhtb r2, r2, r5, asr #19 ; [5 | 4] 81 lsl r3, r5, #16 ; [~7 | x] 82 lsl r4, r4, #16 ; [~6 | x] 83 asr r3, r3, #3 ; [7 | x] 84 pkhtb r3, r3, r4, asr #19 ; [7 | 6] 85 86 str r12, [r1], #4 87 str lr, [r1], #4 88 str r2, [r1], #4 89 str r3, [r1], #4 90 91 qsubaddx r2, r6, r7 ; [c1|a1] [9-10 | 8+11] 92 qaddsubx r3, r6, r7 ; [b1|d1] [9+10 | 8-11] 93 qsubaddx r4, r8, r9 ; [c1|a1] [13-14 | 12+15] 94 qaddsubx r5, r8, r9 ; [b1|d1] [13+14 | 12-15] 95 96 qaddsubx r6, r2, r3 ; [b2|c2] [c1+d1 | a1-b1] 97 qaddsubx r7, r3, r2 ; [a2|d2] [b1+a1 | d1-c1] 98 qaddsubx r8, r4, r5 ; [b2|c2] [c1+d1 | a1-b1] 99 qaddsubx r9, r5, r4 ; [a2|d2] [b1+a1 | d1-c1] 100 101 qadd16 r6, r6, r10 ; [b2+3|c2+3] 102 qadd16 r7, r7, r10 ; [a2+3|d2+3] 103 qadd16 r8, r8, r10 ; [b2+3|c2+3] 104 qadd16 r9, r9, r10 ; [a2+3|d2+3] 105 106 asr r2, r6, #3 ; [9 | x] 107 pkhtb r2, r2, r7, asr #19 ; [9 | 8] 108 lsl r3, r7, #16 ; [~11| x] 109 lsl r4, r6, #16 ; [~10| x] 110 asr r3, r3, #3 ; [11 | x] 111 pkhtb r3, r3, r4, asr #19 ; [11 | 10] 112 113 asr r4, r8, #3 ; [13 | x] 114 pkhtb r4, r4, r9, asr #19 ; [13 | 12] 115 lsl r5, r9, #16 ; [~15| x] 116 lsl r6, r8, #16 ; [~14| x] 117 asr r5, r5, #3 ; [15 | x] 118 pkhtb r5, r5, r6, asr #19 ; [15 | 14] 119 120 str r2, [r1], #4 121 str r3, [r1], #4 122 str r4, [r1], #4 123 str r5, [r1] 124 125 ldmia sp!, {r4 - r11, pc} 126 ENDP ; |vp8_short_inv_walsh4x4_v6| 127 128 129 ;short vp8_short_inv_walsh4x4_1_v6(short *input, short *output) 130 |vp8_short_inv_walsh4x4_1_v6| PROC 131 132 ldrsh r2, [r0] ; [0] 133 add r2, r2, #3 ; [0] + 3 134 asr r2, r2, #3 ; a1 ([0]+3) >> 3 135 lsl r2, r2, #16 ; [a1 | x] 136 orr r2, r2, r2, lsr #16 ; [a1 | a1] 137 138 str r2, [r1], #4 139 str r2, [r1], #4 140 str r2, [r1], #4 141 str r2, [r1], #4 142 str r2, [r1], #4 143 str r2, [r1], #4 144 str r2, [r1], #4 145 str r2, [r1] 146 147 bx lr 148 ENDP ; |vp8_short_inv_walsh4x4_1_v6| 149 150 ; Constant Pool 151 c0x00030003 DCD 0x00030003 152 END 153
