ref: d5b8f7860f17ad5c37bd5f6e9e73d548c80817ab
dir: /vp8/common/arm/neon/loopfilter_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_loop_filter_horizontal_edge_y_neon|
EXPORT |vp8_loop_filter_horizontal_edge_uv_neon|
EXPORT |vp8_loop_filter_vertical_edge_y_neon|
EXPORT |vp8_loop_filter_vertical_edge_uv_neon|
ARM
REQUIRE8
PRESERVE8
AREA ||.text||, CODE, READONLY, ALIGN=2
; flimit, limit, and thresh should be positive numbers.
; All 16 elements in these variables are equal.
; void vp8_loop_filter_horizontal_edge_y_neon(unsigned char *src, int pitch,
; const signed char *flimit,
; const signed char *limit,
; const signed char *thresh,
; int count)
; r0 unsigned char *src
; r1 int pitch
; r2 const signed char *flimit
; r3 const signed char *limit
; sp const signed char *thresh,
; sp+4 int count (unused)
|vp8_loop_filter_horizontal_edge_y_neon| PROC
stmdb sp!, {lr}
vld1.s8 {d0[], d1[]}, [r2] ; flimit
vld1.s8 {d2[], d3[]}, [r3] ; limit
sub r2, r0, r1, lsl #2 ; move src pointer down by 4 lines
ldr r12, [sp, #4] ; load thresh pointer
vld1.u8 {q3}, [r2], r1 ; p3
vld1.u8 {q4}, [r2], r1 ; p2
vld1.u8 {q5}, [r2], r1 ; p1
vld1.u8 {q6}, [r2], r1 ; p0
vld1.u8 {q7}, [r2], r1 ; q0
vld1.u8 {q8}, [r2], r1 ; q1
vld1.u8 {q9}, [r2], r1 ; q2
vld1.u8 {q10}, [r2] ; q3
vld1.s8 {d4[], d5[]}, [r12] ; thresh
sub r0, r0, r1, lsl #1
bl vp8_loop_filter_neon
vst1.u8 {q5}, [r0], r1 ; store op1
vst1.u8 {q6}, [r0], r1 ; store op0
vst1.u8 {q7}, [r0], r1 ; store oq0
vst1.u8 {q8}, [r0], r1 ; store oq1
ldmia sp!, {pc}
ENDP ; |vp8_loop_filter_horizontal_edge_y_neon|
; void vp8_loop_filter_horizontal_edge_uv_neon(unsigned char *u, int pitch
; const signed char *flimit,
; const signed char *limit,
; const signed char *thresh,
; unsigned char *v)
; r0 unsigned char *u,
; r1 int pitch,
; r2 const signed char *flimit,
; r3 const signed char *limit,
; sp const signed char *thresh,
; sp+4 unsigned char *v
|vp8_loop_filter_horizontal_edge_uv_neon| PROC
stmdb sp!, {lr}
vld1.s8 {d0[], d1[]}, [r2] ; flimit
vld1.s8 {d2[], d3[]}, [r3] ; limit
ldr r2, [sp, #8] ; load v ptr
sub r3, r0, r1, lsl #2 ; move u pointer down by 4 lines
vld1.u8 {d6}, [r3], r1 ; p3
vld1.u8 {d8}, [r3], r1 ; p2
vld1.u8 {d10}, [r3], r1 ; p1
vld1.u8 {d12}, [r3], r1 ; p0
vld1.u8 {d14}, [r3], r1 ; q0
vld1.u8 {d16}, [r3], r1 ; q1
vld1.u8 {d18}, [r3], r1 ; q2
vld1.u8 {d20}, [r3] ; q3
ldr r3, [sp, #4] ; load thresh pointer
sub r12, r2, r1, lsl #2 ; move v pointer down by 4 lines
vld1.u8 {d7}, [r12], r1 ; p3
vld1.u8 {d9}, [r12], r1 ; p2
vld1.u8 {d11}, [r12], r1 ; p1
vld1.u8 {d13}, [r12], r1 ; p0
vld1.u8 {d15}, [r12], r1 ; q0
vld1.u8 {d17}, [r12], r1 ; q1
vld1.u8 {d19}, [r12], r1 ; q2
vld1.u8 {d21}, [r12] ; q3
vld1.s8 {d4[], d5[]}, [r3] ; thresh
bl vp8_loop_filter_neon
sub r0, r0, r1, lsl #1
sub r2, r2, r1, lsl #1
vst1.u8 {d10}, [r0], r1 ; store u op1
vst1.u8 {d11}, [r2], r1 ; store v op1
vst1.u8 {d12}, [r0], r1 ; store u op0
vst1.u8 {d13}, [r2], r1 ; store v op0
vst1.u8 {d14}, [r0], r1 ; store u oq0
vst1.u8 {d15}, [r2], r1 ; store v oq0
vst1.u8 {d16}, [r0] ; store u oq1
vst1.u8 {d17}, [r2] ; store v oq1
ldmia sp!, {pc}
ENDP ; |vp8_loop_filter_horizontal_edge_uv_neon|
; void vp8_loop_filter_vertical_edge_y_neon(unsigned char *src, int pitch,
; const signed char *flimit,
; const signed char *limit,
; const signed char *thresh,
; int count)
; r0 unsigned char *src,
; r1 int pitch,
; r2 const signed char *flimit,
; r3 const signed char *limit,
; sp const signed char *thresh,
; sp+4 int count (unused)
|vp8_loop_filter_vertical_edge_y_neon| PROC
stmdb sp!, {lr}
vld1.s8 {d0[], d1[]}, [r2] ; flimit
vld1.s8 {d2[], d3[]}, [r3] ; limit
sub r2, r0, #4 ; src ptr down by 4 columns
sub r0, r0, #2 ; dst ptr
ldr r12, [sp, #4] ; load thresh pointer
vld1.u8 {d6}, [r2], r1 ; load first 8-line src data
vld1.u8 {d8}, [r2], r1
vld1.u8 {d10}, [r2], r1
vld1.u8 {d12}, [r2], r1
vld1.u8 {d14}, [r2], r1
vld1.u8 {d16}, [r2], r1
vld1.u8 {d18}, [r2], r1
vld1.u8 {d20}, [r2], r1
vld1.s8 {d4[], d5[]}, [r12] ; thresh
vld1.u8 {d7}, [r2], r1 ; load second 8-line src data
vld1.u8 {d9}, [r2], r1
vld1.u8 {d11}, [r2], r1
vld1.u8 {d13}, [r2], r1
vld1.u8 {d15}, [r2], r1
vld1.u8 {d17}, [r2], r1
vld1.u8 {d19}, [r2], r1
vld1.u8 {d21}, [r2]
;transpose to 8x16 matrix
vtrn.32 q3, q7
vtrn.32 q4, q8
vtrn.32 q5, q9
vtrn.32 q6, q10
vtrn.16 q3, q5
vtrn.16 q4, q6
vtrn.16 q7, q9
vtrn.16 q8, q10
vtrn.8 q3, q4
vtrn.8 q5, q6
vtrn.8 q7, q8
vtrn.8 q9, q10
bl vp8_loop_filter_neon
vswp d12, d11
vswp d16, d13
vswp d14, d12
vswp d16, d15
;store op1, op0, oq0, oq1
vst4.8 {d10[0], d11[0], d12[0], d13[0]}, [r0], r1
vst4.8 {d10[1], d11[1], d12[1], d13[1]}, [r0], r1
vst4.8 {d10[2], d11[2], d12[2], d13[2]}, [r0], r1
vst4.8 {d10[3], d11[3], d12[3], d13[3]}, [r0], r1
vst4.8 {d10[4], d11[4], d12[4], d13[4]}, [r0], r1
vst4.8 {d10[5], d11[5], d12[5], d13[5]}, [r0], r1
vst4.8 {d10[6], d11[6], d12[6], d13[6]}, [r0], r1
vst4.8 {d10[7], d11[7], d12[7], d13[7]}, [r0], r1
vst4.8 {d14[0], d15[0], d16[0], d17[0]}, [r0], r1
vst4.8 {d14[1], d15[1], d16[1], d17[1]}, [r0], r1
vst4.8 {d14[2], d15[2], d16[2], d17[2]}, [r0], r1
vst4.8 {d14[3], d15[3], d16[3], d17[3]}, [r0], r1
vst4.8 {d14[4], d15[4], d16[4], d17[4]}, [r0], r1
vst4.8 {d14[5], d15[5], d16[5], d17[5]}, [r0], r1
vst4.8 {d14[6], d15[6], d16[6], d17[6]}, [r0], r1
vst4.8 {d14[7], d15[7], d16[7], d17[7]}, [r0]
ldmia sp!, {pc}
ENDP ; |vp8_loop_filter_vertical_edge_y_neon|
; void vp8_loop_filter_vertical_edge_uv_neon(unsigned char *u, int pitch
; const signed char *flimit,
; const signed char *limit,
; const signed char *thresh,
; unsigned char *v)
; r0 unsigned char *u,
; r1 int pitch,
; r2 const signed char *flimit,
; r3 const signed char *limit,
; sp const signed char *thresh,
; sp+4 unsigned char *v
|vp8_loop_filter_vertical_edge_uv_neon| PROC
stmdb sp!, {lr}
sub r12, r0, #4 ; move u pointer down by 4 columns
vld1.s8 {d0[], d1[]}, [r2] ; flimit
vld1.s8 {d2[], d3[]}, [r3] ; limit
ldr r2, [sp, #8] ; load v ptr
vld1.u8 {d6}, [r12], r1 ;load u data
vld1.u8 {d8}, [r12], r1
vld1.u8 {d10}, [r12], r1
vld1.u8 {d12}, [r12], r1
vld1.u8 {d14}, [r12], r1
vld1.u8 {d16}, [r12], r1
vld1.u8 {d18}, [r12], r1
vld1.u8 {d20}, [r12]
sub r3, r2, #4 ; move v pointer down by 4 columns
vld1.u8 {d7}, [r3], r1 ;load v data
vld1.u8 {d9}, [r3], r1
vld1.u8 {d11}, [r3], r1
vld1.u8 {d13}, [r3], r1
vld1.u8 {d15}, [r3], r1
vld1.u8 {d17}, [r3], r1
vld1.u8 {d19}, [r3], r1
vld1.u8 {d21}, [r3]
ldr r12, [sp, #4] ; load thresh pointer
;transpose to 8x16 matrix
vtrn.32 q3, q7
vtrn.32 q4, q8
vtrn.32 q5, q9
vtrn.32 q6, q10
vtrn.16 q3, q5
vtrn.16 q4, q6
vtrn.16 q7, q9
vtrn.16 q8, q10
vtrn.8 q3, q4
vtrn.8 q5, q6
vtrn.8 q7, q8
vtrn.8 q9, q10
vld1.s8 {d4[], d5[]}, [r12] ; thresh
bl vp8_loop_filter_neon
sub r0, r0, #2
sub r2, r2, #2
vswp d12, d11
vswp d16, d13
vswp d14, d12
vswp d16, d15
;store op1, op0, oq0, oq1
vst4.8 {d10[0], d11[0], d12[0], d13[0]}, [r0], r1
vst4.8 {d14[0], d15[0], d16[0], d17[0]}, [r2], r1
vst4.8 {d10[1], d11[1], d12[1], d13[1]}, [r0], r1
vst4.8 {d14[1], d15[1], d16[1], d17[1]}, [r2], r1
vst4.8 {d10[2], d11[2], d12[2], d13[2]}, [r0], r1
vst4.8 {d14[2], d15[2], d16[2], d17[2]}, [r2], r1
vst4.8 {d10[3], d11[3], d12[3], d13[3]}, [r0], r1
vst4.8 {d14[3], d15[3], d16[3], d17[3]}, [r2], r1
vst4.8 {d10[4], d11[4], d12[4], d13[4]}, [r0], r1
vst4.8 {d14[4], d15[4], d16[4], d17[4]}, [r2], r1
vst4.8 {d10[5], d11[5], d12[5], d13[5]}, [r0], r1
vst4.8 {d14[5], d15[5], d16[5], d17[5]}, [r2], r1
vst4.8 {d10[6], d11[6], d12[6], d13[6]}, [r0], r1
vst4.8 {d14[6], d15[6], d16[6], d17[6]}, [r2], r1
vst4.8 {d10[7], d11[7], d12[7], d13[7]}, [r0]
vst4.8 {d14[7], d15[7], d16[7], d17[7]}, [r2]
ldmia sp!, {pc}
ENDP ; |vp8_loop_filter_vertical_edge_uv_neon|
; void vp8_loop_filter_neon();
; This is a helper function for the loopfilters. The invidual functions do the
; necessary load, transpose (if necessary) and store.
; r0-r3 PRESERVE
; q0 flimit
; q1 limit
; q2 thresh
; q3 p3
; q4 p2
; q5 p1
; q6 p0
; q7 q0
; q8 q1
; q9 q2
; q10 q3
|vp8_loop_filter_neon| PROC
; vp8_filter_mask
vabd.u8 q11, q3, q4 ; abs(p3 - p2)
vabd.u8 q12, q4, q5 ; abs(p2 - p1)
vabd.u8 q13, q5, q6 ; abs(p1 - p0)
vabd.u8 q14, q8, q7 ; abs(q1 - q0)
vabd.u8 q3, q9, q8 ; abs(q2 - q1)
vabd.u8 q4, q10, q9 ; abs(q3 - q2)
vabd.u8 q9, q6, q7 ; abs(p0 - q0)
vmax.u8 q11, q11, q12
vmax.u8 q12, q13, q14
vmax.u8 q3, q3, q4
vmax.u8 q15, q11, q12
; vp8_hevmask
vcgt.u8 q13, q13, q2 ; (abs(p1 - p0) > thresh)*-1
vcgt.u8 q14, q14, q2 ; (abs(q1 - q0) > thresh)*-1
vmax.u8 q15, q15, q3
vadd.u8 q0, q0, q0 ; flimit * 2
vadd.u8 q0, q0, q1 ; flimit * 2 + limit
vcge.u8 q15, q1, q15
vabd.u8 q2, q5, q8 ; a = abs(p1 - q1)
vqadd.u8 q9, q9, q9 ; b = abs(p0 - q0) * 2
vshr.u8 q2, q2, #1 ; a = a / 2
vqadd.u8 q9, q9, q2 ; a = b + a
vcge.u8 q9, q0, q9 ; (a > flimit * 2 + limit) * -1
vmov.u8 q0, #0x80 ; 0x80
; vp8_filter() function
; convert to signed
veor q7, q7, q0 ; qs0
veor q6, q6, q0 ; ps0
veor q5, q5, q0 ; ps1
veor q8, q8, q0 ; qs1
vmov.u8 q10, #3 ; #3
vsubl.s8 q2, d14, d12 ; ( qs0 - ps0)
vsubl.s8 q11, d15, d13
vmovl.u8 q4, d20
vqsub.s8 q1, q5, q8 ; vp8_filter = clamp(ps1-qs1)
vorr q14, q13, q14 ; vp8_hevmask
vmul.i16 q2, q2, q4 ; 3 * ( qs0 - ps0)
vmul.i16 q11, q11, q4
vand q1, q1, q14 ; vp8_filter &= hev
vand q15, q15, q9 ; vp8_filter_mask
vaddw.s8 q2, q2, d2
vaddw.s8 q11, q11, d3
vmov.u8 q9, #4 ; #4
; vp8_filter = clamp(vp8_filter + 3 * ( qs0 - ps0))
vqmovn.s16 d2, q2
vqmovn.s16 d3, q11
vand q1, q1, q15 ; vp8_filter &= mask
vqadd.s8 q2, q1, q10 ; Filter2 = clamp(vp8_filter+3)
vqadd.s8 q1, q1, q9 ; Filter1 = clamp(vp8_filter+4)
vshr.s8 q2, q2, #3 ; Filter2 >>= 3
vshr.s8 q1, q1, #3 ; Filter1 >>= 3
vqadd.s8 q11, q6, q2 ; u = clamp(ps0 + Filter2)
vqsub.s8 q10, q7, q1 ; u = clamp(qs0 - Filter1)
; outer tap adjustments: ++vp8_filter >> 1
vrshr.s8 q1, q1, #1
vbic q1, q1, q14 ; vp8_filter &= ~hev
vqadd.s8 q13, q5, q1 ; u = clamp(ps1 + vp8_filter)
vqsub.s8 q12, q8, q1 ; u = clamp(qs1 - vp8_filter)
veor q5, q13, q0 ; *op1 = u^0x80
veor q6, q11, q0 ; *op0 = u^0x80
veor q7, q10, q0 ; *oq0 = u^0x80
veor q8, q12, q0 ; *oq1 = u^0x80
bx lr
ENDP ; |vp8_loop_filter_horizontal_edge_y_neon|
;-----------------
END