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| 1 ; |
| 2 ; Copyright (c) 2013 The WebM project authors. All Rights Reserved. |
| 3 ; |
| 4 ; Use of this source code is governed by a BSD-style license and patent |
| 5 ; grant that can be found in the LICENSE file in the root of the source |
| 6 ; tree. All contributing project authors may be found in the AUTHORS |
| 7 ; file in the root of the source tree. |
| 8 ; |
| 9 |
| 10 EXPORT |vp9_idct32x32_1_add_neon| |
| 11 ARM |
| 12 REQUIRE8 |
| 13 PRESERVE8 |
| 14 |
| 15 AREA ||.text||, CODE, READONLY, ALIGN=2 |
| 16 |
| 17 ;TODO(hkuang): put the following macros in a seperate |
| 18 ;file so other idct function could also use them. |
| 19 MACRO |
| 20 LD_16x8 $src, $stride |
| 21 vld1.8 {q8}, [$src], $stride |
| 22 vld1.8 {q9}, [$src], $stride |
| 23 vld1.8 {q10}, [$src], $stride |
| 24 vld1.8 {q11}, [$src], $stride |
| 25 vld1.8 {q12}, [$src], $stride |
| 26 vld1.8 {q13}, [$src], $stride |
| 27 vld1.8 {q14}, [$src], $stride |
| 28 vld1.8 {q15}, [$src], $stride |
| 29 MEND |
| 30 |
| 31 MACRO |
| 32 ADD_DIFF_16x8 $diff |
| 33 vqadd.u8 q8, q8, $diff |
| 34 vqadd.u8 q9, q9, $diff |
| 35 vqadd.u8 q10, q10, $diff |
| 36 vqadd.u8 q11, q11, $diff |
| 37 vqadd.u8 q12, q12, $diff |
| 38 vqadd.u8 q13, q13, $diff |
| 39 vqadd.u8 q14, q14, $diff |
| 40 vqadd.u8 q15, q15, $diff |
| 41 MEND |
| 42 |
| 43 MACRO |
| 44 SUB_DIFF_16x8 $diff |
| 45 vqsub.u8 q8, q8, $diff |
| 46 vqsub.u8 q9, q9, $diff |
| 47 vqsub.u8 q10, q10, $diff |
| 48 vqsub.u8 q11, q11, $diff |
| 49 vqsub.u8 q12, q12, $diff |
| 50 vqsub.u8 q13, q13, $diff |
| 51 vqsub.u8 q14, q14, $diff |
| 52 vqsub.u8 q15, q15, $diff |
| 53 MEND |
| 54 |
| 55 MACRO |
| 56 ST_16x8 $dst, $stride |
| 57 vst1.8 {q8}, [$dst], $stride |
| 58 vst1.8 {q9}, [$dst], $stride |
| 59 vst1.8 {q10},[$dst], $stride |
| 60 vst1.8 {q11},[$dst], $stride |
| 61 vst1.8 {q12},[$dst], $stride |
| 62 vst1.8 {q13},[$dst], $stride |
| 63 vst1.8 {q14},[$dst], $stride |
| 64 vst1.8 {q15},[$dst], $stride |
| 65 MEND |
| 66 |
| 67 ;void vp9_idct32x32_1_add_neon(int16_t *input, uint8_t *dest, |
| 68 ; int dest_stride) |
| 69 ; |
| 70 ; r0 int16_t input |
| 71 ; r1 uint8_t *dest |
| 72 ; r2 int dest_stride |
| 73 |
| 74 |vp9_idct32x32_1_add_neon| PROC |
| 75 push {lr} |
| 76 pld [r1] |
| 77 add r3, r1, #16 ; r3 dest + 16 for second loop |
| 78 ldrsh r0, [r0] |
| 79 |
| 80 ; generate cospi_16_64 = 11585 |
| 81 mov r12, #0x2d00 |
| 82 add r12, #0x41 |
| 83 |
| 84 ; out = dct_const_round_shift(input[0] * cospi_16_64) |
| 85 mul r0, r0, r12 ; input[0] * cospi_16_64 |
| 86 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) |
| 87 asr r0, r0, #14 ; >> DCT_CONST_BITS |
| 88 |
| 89 ; out = dct_const_round_shift(out * cospi_16_64) |
| 90 mul r0, r0, r12 ; out * cospi_16_64 |
| 91 mov r12, r1 ; save dest |
| 92 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) |
| 93 asr r0, r0, #14 ; >> DCT_CONST_BITS |
| 94 |
| 95 ; a1 = ROUND_POWER_OF_TWO(out, 6) |
| 96 add r0, r0, #32 ; + (1 <<((6) - 1)) |
| 97 asrs r0, r0, #6 ; >> 6 |
| 98 bge diff_positive_32_32 |
| 99 |
| 100 diff_negative_32_32 |
| 101 neg r0, r0 |
| 102 usat r0, #8, r0 |
| 103 vdup.u8 q0, r0 |
| 104 mov r0, #4 |
| 105 |
| 106 diff_negative_32_32_loop |
| 107 sub r0, #1 |
| 108 LD_16x8 r1, r2 |
| 109 SUB_DIFF_16x8 q0 |
| 110 ST_16x8 r12, r2 |
| 111 |
| 112 LD_16x8 r1, r2 |
| 113 SUB_DIFF_16x8 q0 |
| 114 ST_16x8 r12, r2 |
| 115 cmp r0, #2 |
| 116 moveq r1, r3 |
| 117 moveq r12, r3 |
| 118 cmp r0, #0 |
| 119 bne diff_negative_32_32_loop |
| 120 pop {pc} |
| 121 |
| 122 diff_positive_32_32 |
| 123 usat r0, #8, r0 |
| 124 vdup.u8 q0, r0 |
| 125 mov r0, #4 |
| 126 |
| 127 diff_positive_32_32_loop |
| 128 sub r0, #1 |
| 129 LD_16x8 r1, r2 |
| 130 ADD_DIFF_16x8 q0 |
| 131 ST_16x8 r12, r2 |
| 132 |
| 133 LD_16x8 r1, r2 |
| 134 ADD_DIFF_16x8 q0 |
| 135 ST_16x8 r12, r2 |
| 136 cmp r0, #2 |
| 137 moveq r1, r3 |
| 138 moveq r12, r3 |
| 139 cmp r0, #0 |
| 140 bne diff_positive_32_32_loop |
| 141 pop {pc} |
| 142 |
| 143 ENDP ; |vp9_idct32x32_1_add_neon| |
| 144 END |
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