/media/libvpx/vp8/common/arm/neon/bilinearpredict8x8_neon.asm
http://github.com/zpao/v8monkey · Assembly · 183 lines · 128 code · 34 blank · 21 comment · 0 complexity · ee06f1b3f6424b4555141d2b9a9f32c9 MD5 · raw file
- ;
- ; 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_predict8x8_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_predict8x8_neon| PROC
- push {r4, lr}
- adr r12, bifilter8_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 (9x8)
- 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])
- vmull.u8 q7, d4, d0
- vmull.u8 q8, d6, d0
- vmull.u8 q9, d8, 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
- 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
- vld1.u8 {q1}, [r0], r1 ;load src data
- vqrshrn.u16 d22, q6, #7 ;shift/round/saturate to u8
- vld1.u8 {q2}, [r0], r1
- vqrshrn.u16 d23, q7, #7
- vld1.u8 {q3}, [r0], r1
- vqrshrn.u16 d24, q8, #7
- vld1.u8 {q4}, [r0], r1
- vqrshrn.u16 d25, q9, #7
- ;first_pass filtering on the rest 5-line data
- vld1.u8 {q5}, [r0], r1
- vmull.u8 q6, d2, d0 ;(src_ptr[0] * vp8_filter[0])
- 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 d26, q6, #7 ;shift/round/saturate to u8
- vqrshrn.u16 d27, q7, #7
- vqrshrn.u16 d28, q8, #7
- vqrshrn.u16 d29, q9, #7
- vqrshrn.u16 d30, q10, #7
- ;Second pass: 8x8
- 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
- vmull.u8 q5, d26, d0
- vmull.u8 q6, d27, d0
- vmull.u8 q7, d28, d0
- vmull.u8 q8, d29, 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
- vmlal.u8 q5, d27, d1
- vmlal.u8 q6, d28, d1
- vmlal.u8 q7, d29, d1
- vmlal.u8 q8, d30, d1
- 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
- vqrshrn.u16 d6, q5, #7
- vqrshrn.u16 d7, q6, #7
- vqrshrn.u16 d8, q7, #7
- vqrshrn.u16 d9, q8, #7
- vst1.u8 {d2}, [r4] ;store result
- vst1.u8 {d3}, [r0]
- vst1.u8 {d4}, [r1], lr
- vst1.u8 {d5}, [r1], lr
- vst1.u8 {d6}, [r1], lr
- vst1.u8 {d7}, [r1], lr
- vst1.u8 {d8}, [r1], lr
- vst1.u8 {d9}, [r1], lr
- 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
- vld1.u8 {d27}, [r0], r1
- vld1.u8 {d28}, [r0], r1
- vld1.u8 {d29}, [r0], r1
- vld1.u8 {d30}, [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
- vst1.u8 {d26}, [r4], lr
- vst1.u8 {d27}, [r4], lr
- vst1.u8 {d28}, [r4], lr
- vst1.u8 {d29}, [r4], lr
- pop {r4, pc}
- ENDP
- ;-----------------
- bifilter8_coeff
- DCD 128, 0, 112, 16, 96, 32, 80, 48, 64, 64, 48, 80, 32, 96, 16, 112
- END