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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 | |
| 11 EXPORT |vp9_idct8x8_1_add_neon| | |
| 12 ARM | |
| 13 REQUIRE8 | |
| 14 PRESERVE8 | |
| 15 | |
| 16 AREA ||.text||, CODE, READONLY, ALIGN=2 | |
| 17 | |
| 18 ;void vp9_idct8x8_1_add_neon(int16_t *input, uint8_t *dest, | |
| 19 ; int dest_stride) | |
| 20 ; | |
| 21 ; r0 int16_t input | |
| 22 ; r1 uint8_t *dest | |
| 23 ; r2 int dest_stride) | |
| 24 | |
| 25 |vp9_idct8x8_1_add_neon| PROC | |
| 26 ldrsh r0, [r0] | |
| 27 | |
| 28 ; generate cospi_16_64 = 11585 | |
| 29 mov r12, #0x2d00 | |
| 30 add r12, #0x41 | |
| 31 | |
| 32 ; out = dct_const_round_shift(input[0] * cospi_16_64) | |
| 33 mul r0, r0, r12 ; input[0] * cospi_16_64 | |
| 34 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) | |
| 35 asr r0, r0, #14 ; >> DCT_CONST_BITS | |
| 36 | |
| 37 ; out = dct_const_round_shift(out * cospi_16_64) | |
| 38 mul r0, r0, r12 ; out * cospi_16_64 | |
| 39 mov r12, r1 ; save dest | |
| 40 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) | |
| 41 asr r0, r0, #14 ; >> DCT_CONST_BITS | |
| 42 | |
| 43 ; a1 = ROUND_POWER_OF_TWO(out, 5) | |
| 44 add r0, r0, #16 ; + (1 <<((5) - 1)) | |
| 45 asr r0, r0, #5 ; >> 5 | |
| 46 | |
| 47 vdup.s16 q0, r0 ; duplicate a1 | |
| 48 | |
| 49 ; load destination data | |
| 50 vld1.64 {d2}, [r1], r2 | |
| 51 vld1.64 {d3}, [r1], r2 | |
| 52 vld1.64 {d4}, [r1], r2 | |
| 53 vld1.64 {d5}, [r1], r2 | |
| 54 vld1.64 {d6}, [r1], r2 | |
| 55 vld1.64 {d7}, [r1], r2 | |
| 56 vld1.64 {d16}, [r1], r2 | |
| 57 vld1.64 {d17}, [r1] | |
| 58 | |
| 59 vaddw.u8 q9, q0, d2 ; dest[x] + a1 | |
| 60 vaddw.u8 q10, q0, d3 ; dest[x] + a1 | |
| 61 vaddw.u8 q11, q0, d4 ; dest[x] + a1 | |
| 62 vaddw.u8 q12, q0, d5 ; dest[x] + a1 | |
| 63 vqmovun.s16 d2, q9 ; clip_pixel | |
| 64 vqmovun.s16 d3, q10 ; clip_pixel | |
| 65 vqmovun.s16 d30, q11 ; clip_pixel | |
| 66 vqmovun.s16 d31, q12 ; clip_pixel | |
| 67 vst1.64 {d2}, [r12], r2 | |
| 68 vst1.64 {d3}, [r12], r2 | |
| 69 vst1.64 {d30}, [r12], r2 | |
| 70 vst1.64 {d31}, [r12], r2 | |
| 71 | |
| 72 vaddw.u8 q9, q0, d6 ; dest[x] + a1 | |
| 73 vaddw.u8 q10, q0, d7 ; dest[x] + a1 | |
| 74 vaddw.u8 q11, q0, d16 ; dest[x] + a1 | |
| 75 vaddw.u8 q12, q0, d17 ; dest[x] + a1 | |
| 76 vqmovun.s16 d2, q9 ; clip_pixel | |
| 77 vqmovun.s16 d3, q10 ; clip_pixel | |
| 78 vqmovun.s16 d30, q11 ; clip_pixel | |
| 79 vqmovun.s16 d31, q12 ; clip_pixel | |
| 80 vst1.64 {d2}, [r12], r2 | |
| 81 vst1.64 {d3}, [r12], r2 | |
| 82 vst1.64 {d30}, [r12], r2 | |
| 83 vst1.64 {d31}, [r12], r2 | |
| 84 | |
| 85 bx lr | |
| 86 ENDP ; |vp9_idct8x8_1_add_neon| | |
| 87 | |
| 88 END | |
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Chromium Code Reviews
Issue 812033011:
libvpx: Pull from upstream (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/libvpx/