ref: 7e157467dccec39b9863ab077a696189576283ce
dir: /vp8/common/arm/neon/dequant_idct_neon.asm/
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
EXPORT |vp8_dequant_idct_add_neon|
ARM
REQUIRE8
PRESERVE8
AREA ||.text||, CODE, READONLY, ALIGN=2
;void vp8_dequant_idct_add_neon(short *input, short *dq,
; unsigned char *dest, int stride)
; r0 short *input,
; r1 short *dq,
; r2 unsigned char *dest
; r3 int stride
|vp8_dequant_idct_add_neon| PROC
vld1.16 {q3, q4}, [r0]
vld1.16 {q5, q6}, [r1]
add r1, r2, r3 ; r1 = dest + stride
lsl r3, #1 ; 2x stride
vld1.32 {d14[0]}, [r2], r3
vld1.32 {d14[1]}, [r1], r3
vld1.32 {d15[0]}, [r2]
vld1.32 {d15[1]}, [r1]
adr r12, cospi8sqrt2minus1 ; pointer to the first constant
vmul.i16 q1, q3, q5 ;input for short_idct4x4llm_neon
vmul.i16 q2, q4, q6
;|short_idct4x4llm_neon| PROC
vld1.16 {d0}, [r12]
vswp d3, d4 ;q2(vp[4] vp[12])
vqdmulh.s16 q3, q2, d0[2]
vqdmulh.s16 q4, q2, d0[0]
vqadd.s16 d12, d2, d3 ;a1
vqsub.s16 d13, d2, d3 ;b1
vshr.s16 q3, q3, #1
vshr.s16 q4, q4, #1
vqadd.s16 q3, q3, q2
vqadd.s16 q4, q4, q2
vqsub.s16 d10, d6, d9 ;c1
vqadd.s16 d11, d7, d8 ;d1
vqadd.s16 d2, d12, d11
vqadd.s16 d3, d13, d10
vqsub.s16 d4, d13, d10
vqsub.s16 d5, d12, d11
vtrn.32 d2, d4
vtrn.32 d3, d5
vtrn.16 d2, d3
vtrn.16 d4, d5
; memset(input, 0, 32) -- 32bytes
vmov.i16 q14, #0
vswp d3, d4
vqdmulh.s16 q3, q2, d0[2]
vqdmulh.s16 q4, q2, d0[0]
vqadd.s16 d12, d2, d3 ;a1
vqsub.s16 d13, d2, d3 ;b1
vmov q15, q14
vshr.s16 q3, q3, #1
vshr.s16 q4, q4, #1
vqadd.s16 q3, q3, q2
vqadd.s16 q4, q4, q2
vqsub.s16 d10, d6, d9 ;c1
vqadd.s16 d11, d7, d8 ;d1
vqadd.s16 d2, d12, d11
vqadd.s16 d3, d13, d10
vqsub.s16 d4, d13, d10
vqsub.s16 d5, d12, d11
vst1.16 {q14, q15}, [r0]
vrshr.s16 d2, d2, #3
vrshr.s16 d3, d3, #3
vrshr.s16 d4, d4, #3
vrshr.s16 d5, d5, #3
vtrn.32 d2, d4
vtrn.32 d3, d5
vtrn.16 d2, d3
vtrn.16 d4, d5
vaddw.u8 q1, q1, d14
vaddw.u8 q2, q2, d15
sub r2, r2, r3
sub r1, r1, r3
vqmovun.s16 d0, q1
vqmovun.s16 d1, q2
vst1.32 {d0[0]}, [r2], r3
vst1.32 {d0[1]}, [r1], r3
vst1.32 {d1[0]}, [r2]
vst1.32 {d1[1]}, [r1]
bx lr
ENDP ; |vp8_dequant_idct_add_neon|
; Constant Pool
cospi8sqrt2minus1 DCD 0x4e7b4e7b
sinpi8sqrt2 DCD 0x8a8c8a8c
END