| ; |
| ; Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| ; |
| ; This source code is subject to the terms of the BSD 2 Clause License and |
| ; the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| ; was not distributed with this source code in the LICENSE file, you can |
| ; obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| ; Media Patent License 1.0 was not distributed with this source code in the |
| ; PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| ; |
| |
| |
| |
| EXPORT |aom_idct4x4_1_add_neon| |
| ARM |
| REQUIRE8 |
| PRESERVE8 |
| |
| AREA ||.text||, CODE, READONLY, ALIGN=2 |
| |
| ;void aom_idct4x4_1_add_neon(int16_t *input, uint8_t *dest, |
| ; int dest_stride) |
| ; |
| ; r0 int16_t input |
| ; r1 uint8_t *dest |
| ; r2 int dest_stride) |
| |
| |aom_idct4x4_1_add_neon| PROC |
| ldrsh r0, [r0] |
| |
| ; generate cospi_16_64 = 11585 |
| mov r12, #0x2d00 |
| add r12, #0x41 |
| |
| ; out = dct_const_round_shift(input[0] * cospi_16_64) |
| mul r0, r0, r12 ; input[0] * cospi_16_64 |
| add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) |
| asr r0, r0, #14 ; >> DCT_CONST_BITS |
| |
| ; out = dct_const_round_shift(out * cospi_16_64) |
| mul r0, r0, r12 ; out * cospi_16_64 |
| mov r12, r1 ; save dest |
| add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) |
| asr r0, r0, #14 ; >> DCT_CONST_BITS |
| |
| ; a1 = ROUND_POWER_OF_TWO(out, 4) |
| add r0, r0, #8 ; + (1 <<((4) - 1)) |
| asr r0, r0, #4 ; >> 4 |
| |
| vdup.s16 q0, r0 ; duplicate a1 |
| |
| vld1.32 {d2[0]}, [r1], r2 |
| vld1.32 {d2[1]}, [r1], r2 |
| vld1.32 {d4[0]}, [r1], r2 |
| vld1.32 {d4[1]}, [r1] |
| |
| vaddw.u8 q8, q0, d2 ; dest[x] + a1 |
| vaddw.u8 q9, q0, d4 |
| |
| vqmovun.s16 d6, q8 ; clip_pixel |
| vqmovun.s16 d7, q9 |
| |
| vst1.32 {d6[0]}, [r12], r2 |
| vst1.32 {d6[1]}, [r12], r2 |
| vst1.32 {d7[0]}, [r12], r2 |
| vst1.32 {d7[1]}, [r12] |
| |
| bx lr |
| ENDP ; |aom_idct4x4_1_add_neon| |
| |
| END |