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|
;
; 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
|
