89 lines
3.2 KiB
NASM
89 lines
3.2 KiB
NASM
;
|
|
; Copyright (c) 2013 The WebM project authors. All Rights Reserved.
|
|
;
|
|
; Use of this source code is governed by a BSD-style license and patent
|
|
; grant that can be found in the LICENSE file in the root of the source
|
|
; tree. All contributing project authors may be found in the AUTHORS
|
|
; file in the root of the source tree.
|
|
;
|
|
|
|
|
|
EXPORT |vp9_idct8x8_1_add_neon|
|
|
ARM
|
|
REQUIRE8
|
|
PRESERVE8
|
|
|
|
AREA ||.text||, CODE, READONLY, ALIGN=2
|
|
|
|
;void vp9_idct8x8_1_add_neon(int16_t *input, uint8_t *dest,
|
|
; int dest_stride)
|
|
;
|
|
; r0 int16_t input
|
|
; r1 uint8_t *dest
|
|
; r2 int dest_stride)
|
|
|
|
|vp9_idct8x8_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, 5)
|
|
add r0, r0, #16 ; + (1 <<((5) - 1))
|
|
asr r0, r0, #5 ; >> 5
|
|
|
|
vdup.s16 q0, r0 ; duplicate a1
|
|
|
|
; load destination data
|
|
vld1.64 {d2}, [r1], r2
|
|
vld1.64 {d3}, [r1], r2
|
|
vld1.64 {d4}, [r1], r2
|
|
vld1.64 {d5}, [r1], r2
|
|
vld1.64 {d6}, [r1], r2
|
|
vld1.64 {d7}, [r1], r2
|
|
vld1.64 {d16}, [r1], r2
|
|
vld1.64 {d17}, [r1]
|
|
|
|
vaddw.u8 q9, q0, d2 ; dest[x] + a1
|
|
vaddw.u8 q10, q0, d3 ; dest[x] + a1
|
|
vaddw.u8 q11, q0, d4 ; dest[x] + a1
|
|
vaddw.u8 q12, q0, d5 ; dest[x] + a1
|
|
vqmovun.s16 d2, q9 ; clip_pixel
|
|
vqmovun.s16 d3, q10 ; clip_pixel
|
|
vqmovun.s16 d30, q11 ; clip_pixel
|
|
vqmovun.s16 d31, q12 ; clip_pixel
|
|
vst1.64 {d2}, [r12], r2
|
|
vst1.64 {d3}, [r12], r2
|
|
vst1.64 {d30}, [r12], r2
|
|
vst1.64 {d31}, [r12], r2
|
|
|
|
vaddw.u8 q9, q0, d6 ; dest[x] + a1
|
|
vaddw.u8 q10, q0, d7 ; dest[x] + a1
|
|
vaddw.u8 q11, q0, d16 ; dest[x] + a1
|
|
vaddw.u8 q12, q0, d17 ; dest[x] + a1
|
|
vqmovun.s16 d2, q9 ; clip_pixel
|
|
vqmovun.s16 d3, q10 ; clip_pixel
|
|
vqmovun.s16 d30, q11 ; clip_pixel
|
|
vqmovun.s16 d31, q12 ; clip_pixel
|
|
vst1.64 {d2}, [r12], r2
|
|
vst1.64 {d3}, [r12], r2
|
|
vst1.64 {d30}, [r12], r2
|
|
vst1.64 {d31}, [r12], r2
|
|
|
|
bx lr
|
|
ENDP ; |vp9_idct8x8_1_add_neon|
|
|
|
|
END
|