c2140b8af1
Changes 'The VP8 project' to 'The WebM project', for consistency with other webmproject.org repositories. Fixes issue #97. Change-Id: I37c13ed5fbdb9d334ceef71c6350e9febed9bbba
141 lines
4.5 KiB
NASM
141 lines
4.5 KiB
NASM
;
|
|
; 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_bilinear_predict8x4_neon|
|
|
ARM
|
|
REQUIRE8
|
|
PRESERVE8
|
|
|
|
AREA ||.text||, CODE, READONLY, ALIGN=2
|
|
; r0 unsigned char *src_ptr,
|
|
; r1 int src_pixels_per_line,
|
|
; r2 int xoffset,
|
|
; r3 int yoffset,
|
|
; r4 unsigned char *dst_ptr,
|
|
; stack(lr) int dst_pitch
|
|
|
|
|vp8_bilinear_predict8x4_neon| PROC
|
|
push {r4, lr}
|
|
|
|
ldr r12, _bifilter8x4_coeff_
|
|
ldr r4, [sp, #8] ;load parameters from stack
|
|
ldr lr, [sp, #12] ;load parameters from stack
|
|
|
|
cmp r2, #0 ;skip first_pass filter if xoffset=0
|
|
beq skip_firstpass_filter
|
|
|
|
;First pass: output_height lines x output_width columns (5x8)
|
|
add r2, r12, r2, lsl #3 ;calculate filter location
|
|
|
|
vld1.u8 {q1}, [r0], r1 ;load src data
|
|
vld1.u32 {d31}, [r2] ;load first_pass filter
|
|
vld1.u8 {q2}, [r0], r1
|
|
vdup.8 d0, d31[0] ;first_pass filter (d0 d1)
|
|
vld1.u8 {q3}, [r0], r1
|
|
vdup.8 d1, d31[4]
|
|
vld1.u8 {q4}, [r0], r1
|
|
|
|
vmull.u8 q6, d2, d0 ;(src_ptr[0] * vp8_filter[0])
|
|
vld1.u8 {q5}, [r0], r1
|
|
vmull.u8 q7, d4, d0
|
|
vmull.u8 q8, d6, d0
|
|
vmull.u8 q9, d8, d0
|
|
vmull.u8 q10, d10, d0
|
|
|
|
vext.8 d3, d2, d3, #1 ;construct src_ptr[-1]
|
|
vext.8 d5, d4, d5, #1
|
|
vext.8 d7, d6, d7, #1
|
|
vext.8 d9, d8, d9, #1
|
|
vext.8 d11, d10, d11, #1
|
|
|
|
vmlal.u8 q6, d3, d1 ;(src_ptr[1] * vp8_filter[1])
|
|
vmlal.u8 q7, d5, d1
|
|
vmlal.u8 q8, d7, d1
|
|
vmlal.u8 q9, d9, d1
|
|
vmlal.u8 q10, d11, d1
|
|
|
|
vqrshrn.u16 d22, q6, #7 ;shift/round/saturate to u8
|
|
vqrshrn.u16 d23, q7, #7
|
|
vqrshrn.u16 d24, q8, #7
|
|
vqrshrn.u16 d25, q9, #7
|
|
vqrshrn.u16 d26, q10, #7
|
|
|
|
;Second pass: 4x8
|
|
secondpass_filter
|
|
cmp r3, #0 ;skip second_pass filter if yoffset=0
|
|
beq skip_secondpass_filter
|
|
|
|
add r3, r12, r3, lsl #3
|
|
add r0, r4, lr
|
|
|
|
vld1.u32 {d31}, [r3] ;load second_pass filter
|
|
add r1, r0, lr
|
|
|
|
vdup.8 d0, d31[0] ;second_pass filter parameters (d0 d1)
|
|
vdup.8 d1, d31[4]
|
|
|
|
vmull.u8 q1, d22, d0 ;(src_ptr[0] * vp8_filter[0])
|
|
vmull.u8 q2, d23, d0
|
|
vmull.u8 q3, d24, d0
|
|
vmull.u8 q4, d25, d0
|
|
|
|
vmlal.u8 q1, d23, d1 ;(src_ptr[pixel_step] * vp8_filter[1])
|
|
vmlal.u8 q2, d24, d1
|
|
vmlal.u8 q3, d25, d1
|
|
vmlal.u8 q4, d26, d1
|
|
|
|
add r2, r1, lr
|
|
|
|
vqrshrn.u16 d2, q1, #7 ;shift/round/saturate to u8
|
|
vqrshrn.u16 d3, q2, #7
|
|
vqrshrn.u16 d4, q3, #7
|
|
vqrshrn.u16 d5, q4, #7
|
|
|
|
vst1.u8 {d2}, [r4] ;store result
|
|
vst1.u8 {d3}, [r0]
|
|
vst1.u8 {d4}, [r1]
|
|
vst1.u8 {d5}, [r2]
|
|
|
|
pop {r4, pc}
|
|
|
|
;--------------------
|
|
skip_firstpass_filter
|
|
vld1.u8 {d22}, [r0], r1 ;load src data
|
|
vld1.u8 {d23}, [r0], r1
|
|
vld1.u8 {d24}, [r0], r1
|
|
vld1.u8 {d25}, [r0], r1
|
|
vld1.u8 {d26}, [r0], r1
|
|
|
|
b secondpass_filter
|
|
|
|
;---------------------
|
|
skip_secondpass_filter
|
|
vst1.u8 {d22}, [r4], lr ;store result
|
|
vst1.u8 {d23}, [r4], lr
|
|
vst1.u8 {d24}, [r4], lr
|
|
vst1.u8 {d25}, [r4], lr
|
|
|
|
pop {r4, pc}
|
|
|
|
ENDP
|
|
|
|
;-----------------
|
|
AREA bifilters8x4_dat, DATA, READWRITE ;read/write by default
|
|
;Data section with name data_area is specified. DCD reserves space in memory for 48 data.
|
|
;One word each is reserved. Label filter_coeff can be used to access the data.
|
|
;Data address: filter_coeff, filter_coeff+4, filter_coeff+8 ...
|
|
_bifilter8x4_coeff_
|
|
DCD bifilter8x4_coeff
|
|
bifilter8x4_coeff
|
|
DCD 128, 0, 112, 16, 96, 32, 80, 48, 64, 64, 48, 80, 32, 96, 16, 112
|
|
|
|
END
|