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 |vpx_idct4x4_1_add_neon| 12 ARM 13 REQUIRE8 14 PRESERVE8 15 16 AREA ||.text||, CODE, READONLY, ALIGN=2 17 18;void vpx_idct4x4_1_add_neon(int16_t *input, uint8_t *dest, int stride) 19; 20; r0 int16_t input 21; r1 uint8_t *dest 22; r2 int stride) 23 24|vpx_idct4x4_1_add_neon| PROC 25 ldrsh r0, [r0] 26 27 ; cospi_16_64 = 11585 28 movw r12, #0x2d41 29 30 ; out = dct_const_round_shift(input[0] * cospi_16_64) 31 mul r0, r0, r12 ; input[0] * cospi_16_64 32 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) 33 asr r0, r0, #14 ; >> DCT_CONST_BITS 34 35 ; out = dct_const_round_shift(out * cospi_16_64) 36 mul r0, r0, r12 ; out * cospi_16_64 37 mov r12, r1 ; save dest 38 add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) 39 asr r0, r0, #14 ; >> DCT_CONST_BITS 40 41 ; a1 = ROUND_POWER_OF_TWO(out, 4) 42 add r0, r0, #8 ; + (1 <<((4) - 1)) 43 asr r0, r0, #4 ; >> 4 44 45 vdup.s16 q0, r0 ; duplicate a1 46 47 vld1.32 {d2[0]}, [r1], r2 48 vld1.32 {d2[1]}, [r1], r2 49 vld1.32 {d4[0]}, [r1], r2 50 vld1.32 {d4[1]}, [r1] 51 52 vaddw.u8 q8, q0, d2 ; dest[x] + a1 53 vaddw.u8 q9, q0, d4 54 55 vqmovun.s16 d6, q8 ; clip_pixel 56 vqmovun.s16 d7, q9 57 58 vst1.32 {d6[0]}, [r12], r2 59 vst1.32 {d6[1]}, [r12], r2 60 vst1.32 {d7[0]}, [r12], r2 61 vst1.32 {d7[1]}, [r12] 62 63 bx lr 64 ENDP ; |vpx_idct4x4_1_add_neon| 65 66 END 67