2010-05-18 17:58:33 +02:00
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;
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2010-09-09 14:16:39 +02:00
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; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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2010-05-18 17:58:33 +02:00
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;
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2010-06-18 18:39:21 +02:00
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; Use of this source code is governed by a BSD-style license
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2010-06-04 22:19:40 +02:00
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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2010-06-18 18:39:21 +02:00
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; in the file PATENTS. All contributing project authors may
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2010-06-04 22:19:40 +02:00
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; be found in the AUTHORS file in the root of the source tree.
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2010-05-18 17:58:33 +02:00
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;
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EXPORT |vp8_sub_pixel_variance8x8_neon|
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ARM
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REQUIRE8
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PRESERVE8
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AREA ||.text||, CODE, READONLY, ALIGN=2
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; r0 unsigned char *src_ptr,
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; r1 int src_pixels_per_line,
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; r2 int xoffset,
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; r3 int yoffset,
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; stack(r4) unsigned char *dst_ptr,
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; stack(r5) int dst_pixels_per_line,
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; stack(r6) unsigned int *sse
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;note: most of the code is copied from bilinear_predict8x8_neon and vp8_variance8x8_neon.
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|vp8_sub_pixel_variance8x8_neon| PROC
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push {r4-r5, lr}
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ldr r12, _BilinearTaps_coeff_
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ldr r4, [sp, #12] ;load *dst_ptr from stack
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ldr r5, [sp, #16] ;load dst_pixels_per_line from stack
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ldr lr, [sp, #20] ;load *sse from stack
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cmp r2, #0 ;skip first_pass filter if xoffset=0
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beq skip_firstpass_filter
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;First pass: output_height lines x output_width columns (9x8)
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add r2, r12, r2, lsl #3 ;calculate filter location
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vld1.u8 {q1}, [r0], r1 ;load src data
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vld1.u32 {d31}, [r2] ;load first_pass filter
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vld1.u8 {q2}, [r0], r1
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vdup.8 d0, d31[0] ;first_pass filter (d0 d1)
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vld1.u8 {q3}, [r0], r1
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vdup.8 d1, d31[4]
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vld1.u8 {q4}, [r0], r1
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vmull.u8 q6, d2, d0 ;(src_ptr[0] * Filter[0])
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vmull.u8 q7, d4, d0
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vmull.u8 q8, d6, d0
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vmull.u8 q9, d8, d0
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vext.8 d3, d2, d3, #1 ;construct src_ptr[-1]
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vext.8 d5, d4, d5, #1
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vext.8 d7, d6, d7, #1
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vext.8 d9, d8, d9, #1
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vmlal.u8 q6, d3, d1 ;(src_ptr[1] * Filter[1])
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vmlal.u8 q7, d5, d1
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vmlal.u8 q8, d7, d1
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vmlal.u8 q9, d9, d1
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vld1.u8 {q1}, [r0], r1 ;load src data
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vqrshrn.u16 d22, q6, #7 ;shift/round/saturate to u8
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vld1.u8 {q2}, [r0], r1
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vqrshrn.u16 d23, q7, #7
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vld1.u8 {q3}, [r0], r1
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vqrshrn.u16 d24, q8, #7
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vld1.u8 {q4}, [r0], r1
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vqrshrn.u16 d25, q9, #7
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;first_pass filtering on the rest 5-line data
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vld1.u8 {q5}, [r0], r1
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vmull.u8 q6, d2, d0 ;(src_ptr[0] * Filter[0])
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vmull.u8 q7, d4, d0
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vmull.u8 q8, d6, d0
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vmull.u8 q9, d8, d0
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vmull.u8 q10, d10, d0
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vext.8 d3, d2, d3, #1 ;construct src_ptr[-1]
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vext.8 d5, d4, d5, #1
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vext.8 d7, d6, d7, #1
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vext.8 d9, d8, d9, #1
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vext.8 d11, d10, d11, #1
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vmlal.u8 q6, d3, d1 ;(src_ptr[1] * Filter[1])
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vmlal.u8 q7, d5, d1
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vmlal.u8 q8, d7, d1
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vmlal.u8 q9, d9, d1
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vmlal.u8 q10, d11, d1
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vqrshrn.u16 d26, q6, #7 ;shift/round/saturate to u8
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vqrshrn.u16 d27, q7, #7
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vqrshrn.u16 d28, q8, #7
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vqrshrn.u16 d29, q9, #7
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vqrshrn.u16 d30, q10, #7
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;Second pass: 8x8
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secondpass_filter
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cmp r3, #0 ;skip second_pass filter if yoffset=0
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;skip_secondpass_filter
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beq sub_pixel_variance8x8_neon
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add r3, r12, r3, lsl #3
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vld1.u32 {d31}, [r3] ;load second_pass filter
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vdup.8 d0, d31[0] ;second_pass filter parameters (d0 d1)
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vdup.8 d1, d31[4]
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vmull.u8 q1, d22, d0 ;(src_ptr[0] * Filter[0])
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vmull.u8 q2, d23, d0
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vmull.u8 q3, d24, d0
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vmull.u8 q4, d25, d0
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vmull.u8 q5, d26, d0
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vmull.u8 q6, d27, d0
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vmull.u8 q7, d28, d0
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vmull.u8 q8, d29, d0
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vmlal.u8 q1, d23, d1 ;(src_ptr[pixel_step] * Filter[1])
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vmlal.u8 q2, d24, d1
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vmlal.u8 q3, d25, d1
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vmlal.u8 q4, d26, d1
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vmlal.u8 q5, d27, d1
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vmlal.u8 q6, d28, d1
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vmlal.u8 q7, d29, d1
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vmlal.u8 q8, d30, d1
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vqrshrn.u16 d22, q1, #7 ;shift/round/saturate to u8
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vqrshrn.u16 d23, q2, #7
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vqrshrn.u16 d24, q3, #7
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vqrshrn.u16 d25, q4, #7
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vqrshrn.u16 d26, q5, #7
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vqrshrn.u16 d27, q6, #7
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vqrshrn.u16 d28, q7, #7
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vqrshrn.u16 d29, q8, #7
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b sub_pixel_variance8x8_neon
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;--------------------
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skip_firstpass_filter
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vld1.u8 {d22}, [r0], r1 ;load src data
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vld1.u8 {d23}, [r0], r1
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vld1.u8 {d24}, [r0], r1
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vld1.u8 {d25}, [r0], r1
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vld1.u8 {d26}, [r0], r1
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vld1.u8 {d27}, [r0], r1
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vld1.u8 {d28}, [r0], r1
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vld1.u8 {d29}, [r0], r1
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vld1.u8 {d30}, [r0], r1
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b secondpass_filter
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;----------------------
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;vp8_variance8x8_neon
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sub_pixel_variance8x8_neon
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vmov.i8 q8, #0 ;q8 - sum
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vmov.i8 q9, #0 ;q9, q10 - sse
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vmov.i8 q10, #0
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mov r12, #2
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sub_pixel_variance8x8_neon_loop
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vld1.8 {d0}, [r4], r5 ;load dst data
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subs r12, r12, #1
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vld1.8 {d1}, [r4], r5
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vld1.8 {d2}, [r4], r5
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vsubl.u8 q4, d22, d0 ;calculate diff
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vld1.8 {d3}, [r4], r5
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vsubl.u8 q5, d23, d1
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vsubl.u8 q6, d24, d2
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vpadal.s16 q8, q4 ;sum
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vmlal.s16 q9, d8, d8 ;sse
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vmlal.s16 q10, d9, d9
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vsubl.u8 q7, d25, d3
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vpadal.s16 q8, q5
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vmlal.s16 q9, d10, d10
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vmlal.s16 q10, d11, d11
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vmov q11, q13
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vpadal.s16 q8, q6
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vmlal.s16 q9, d12, d12
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vmlal.s16 q10, d13, d13
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vmov q12, q14
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vpadal.s16 q8, q7
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vmlal.s16 q9, d14, d14
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vmlal.s16 q10, d15, d15
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bne sub_pixel_variance8x8_neon_loop
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vadd.u32 q10, q9, q10 ;accumulate sse
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vpaddl.s32 q0, q8 ;accumulate sum
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vpaddl.u32 q1, q10
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vadd.s64 d0, d0, d1
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vadd.u64 d1, d2, d3
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vmull.s32 q5, d0, d0
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vst1.32 {d1[0]}, [lr] ;store sse
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vshr.s32 d10, d10, #6
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vsub.s32 d0, d1, d10
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vmov.32 r0, d0[0] ;return
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pop {r4-r5, pc}
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ENDP
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;-----------------
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2011-01-24 10:21:40 +01:00
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2010-05-18 17:58:33 +02:00
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_BilinearTaps_coeff_
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DCD bilinear_taps_coeff
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bilinear_taps_coeff
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DCD 128, 0, 112, 16, 96, 32, 80, 48, 64, 64, 48, 80, 32, 96, 16, 112
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END
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