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_dc_only_idct_add_neon| 12 ARM 13 REQUIRE8 14 PRESERVE8 15 16 AREA ||.text||, CODE, READONLY, ALIGN=2 17 18;void vp9_dc_only_idct_add_neon(int input_dc, uint8_t *pred_ptr, 19; uint8_t *dst_ptr, int pitch, int stride) 20; 21; r0 int input_dc 22; r1 uint8_t *pred_ptr 23; r2 uint8_t *dst_ptr 24; r3 int pitch 25; sp int stride 26 27|vp9_dc_only_idct_add_neon| PROC 28 29 ; generate cospi_16_64 = 11585 30 mov r12, #0x2d00 31 add r12, #0x41 32 33 ; dct_const_round_shift(input_dc * cospi_16_64) 34 mul r0, r0, r12 ; input_dc * cospi_16_64 35 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) 36 asr r0, r0, #14 ; >> DCT_CONST_BITS 37 38 ; dct_const_round_shift(out * cospi_16_64) 39 mul r0, r0, r12 ; out * cospi_16_64 40 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) 41 asr r0, r0, #14 ; >> DCT_CONST_BITS 42 43 ; ROUND_POWER_OF_TWO(out, 4) 44 add r0, r0, #8 ; + (1 <<((4) - 1)) 45 asr r0, r0, #4 ; >> 4 46 47 vdup.16 q0, r0; ; duplicate a1 48 ldr r12, [sp] ; load stride 49 50 vld1.32 {d2[0]}, [r1], r3 51 vld1.32 {d2[1]}, [r1], r3 52 vld1.32 {d4[0]}, [r1], r3 53 vld1.32 {d4[1]}, [r1] 54 55 vaddw.u8 q1, q0, d2 ; a1 + pred_ptr[c] 56 vaddw.u8 q2, q0, d4 57 58 vqmovun.s16 d2, q1 ; clip_pixel 59 vqmovun.s16 d4, q2 60 61 vst1.32 {d2[0]}, [r2], r12 62 vst1.32 {d2[1]}, [r2], r12 63 vst1.32 {d4[0]}, [r2], r12 64 vst1.32 {d4[1]}, [r2] 65 66 bx lr 67 ENDP ; |vp9_dc_only_idct_add_neon| 68 69 END 70