ref: 3497c4c905f8c85d8c65b28c352ff85dfddd66ed
dir: /src/arm/32/cdef.S/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2019, Martin Storsjo
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "src/arm/asm.S"
#include "util.S"
#include "cdef_tmpl.S"
// n1 = s0/d0
// w1 = d0/q0
// n2 = s4/d2
// w2 = d2/q1
.macro pad_top_bottom s1, s2, w, stride, n1, w1, n2, w2, align, ret
tst r6, #1 // CDEF_HAVE_LEFT
beq 2f
// CDEF_HAVE_LEFT
tst r6, #2 // CDEF_HAVE_RIGHT
beq 1f
// CDEF_HAVE_LEFT+CDEF_HAVE_RIGHT
ldrh r12, [\s1, #-2]
vldr \n1, [\s1]
vdup.16 d4, r12
ldrh r12, [\s1, #\w]
vmov.16 d4[1], r12
ldrh r12, [\s2, #-2]
vldr \n2, [\s2]
vmov.16 d4[2], r12
ldrh r12, [\s2, #\w]
vmovl.u8 q0, d0
vmov.16 d4[3], r12
vmovl.u8 q1, d2
vmovl.u8 q2, d4
vstr s8, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s9, [r0, #2*\w]
add r0, r0, #2*\stride
vstr s10, [r0, #-4]
vst1.16 {\w2}, [r0, :\align]
vstr s11, [r0, #2*\w]
.if \ret
pop {r4-r7,pc}
.else
add r0, r0, #2*\stride
b 3f
.endif
1:
// CDEF_HAVE_LEFT+!CDEF_HAVE_RIGHT
ldrh r12, [\s1, #-2]
vldr \n1, [\s1]
vdup.16 d4, r12
ldrh r12, [\s2, #-2]
vldr \n2, [\s2]
vmovl.u8 q0, d0
vmov.16 d4[1], r12
vmovl.u8 q1, d2
vmovl.u8 q2, d4
vstr s8, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s12, [r0, #2*\w]
add r0, r0, #2*\stride
vstr s9, [r0, #-4]
vst1.16 {\w2}, [r0, :\align]
vstr s12, [r0, #2*\w]
.if \ret
pop {r4-r7,pc}
.else
add r0, r0, #2*\stride
b 3f
.endif
2:
// !CDEF_HAVE_LEFT
tst r6, #2 // CDEF_HAVE_RIGHT
beq 1f
// !CDEF_HAVE_LEFT+CDEF_HAVE_RIGHT
vldr \n1, [\s1]
ldrh r12, [\s1, #\w]
vldr \n2, [\s2]
vdup.16 d4, r12
ldrh r12, [\s2, #\w]
vmovl.u8 q0, d0
vmov.16 d4[1], r12
vmovl.u8 q1, d2
vmovl.u8 q2, d4
vstr s12, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s8, [r0, #2*\w]
add r0, r0, #2*\stride
vstr s12, [r0, #-4]
vst1.16 {\w2}, [r0, :\align]
vstr s9, [r0, #2*\w]
.if \ret
pop {r4-r7,pc}
.else
add r0, r0, #2*\stride
b 3f
.endif
1:
// !CDEF_HAVE_LEFT+!CDEF_HAVE_RIGHT
vldr \n1, [\s1]
vldr \n2, [\s2]
vmovl.u8 q0, d0
vmovl.u8 q1, d2
vstr s12, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s12, [r0, #2*\w]
add r0, r0, #2*\stride
vstr s12, [r0, #-4]
vst1.16 {\w2}, [r0, :\align]
vstr s12, [r0, #2*\w]
.if \ret
pop {r4-r7,pc}
.else
add r0, r0, #2*\stride
.endif
3:
.endm
.macro load_n_incr dst, src, incr, w
.if \w == 4
vld1.32 {\dst\()[0]}, [\src, :32], \incr
.else
vld1.8 {\dst\()}, [\src, :64], \incr
.endif
.endm
// void dav1d_cdef_paddingX_8bpc_neon(uint16_t *tmp, const pixel *src,
// ptrdiff_t src_stride, const pixel (*left)[2],
// const pixel *const top, int h,
// enum CdefEdgeFlags edges);
// n1 = s0/d0
// w1 = d0/q0
// n2 = s4/d2
// w2 = d2/q1
.macro padding_func w, stride, n1, w1, n2, w2, align
function cdef_padding\w\()_8bpc_neon, export=1
push {r4-r7,lr}
ldrd r4, r5, [sp, #20]
ldr r6, [sp, #28]
cmp r6, #0xf // fully edged
beq cdef_padding\w\()_edged_8bpc_neon
vmov.i16 q3, #0x8000
tst r6, #4 // CDEF_HAVE_TOP
bne 1f
// !CDEF_HAVE_TOP
sub r12, r0, #2*(2*\stride+2)
vmov.i16 q2, #0x8000
vst1.16 {q2,q3}, [r12]!
.if \w == 8
vst1.16 {q2,q3}, [r12]!
.endif
b 3f
1:
// CDEF_HAVE_TOP
add r7, r4, r2
sub r0, r0, #2*(2*\stride)
pad_top_bottom r4, r7, \w, \stride, \n1, \w1, \n2, \w2, \align, 0
// Middle section
3:
tst r6, #1 // CDEF_HAVE_LEFT
beq 2f
// CDEF_HAVE_LEFT
tst r6, #2 // CDEF_HAVE_RIGHT
beq 1f
// CDEF_HAVE_LEFT+CDEF_HAVE_RIGHT
0:
vld1.16 {d2[]}, [r3, :16]!
ldrh r12, [r1, #\w]
load_n_incr d0, r1, r2, \w
subs r5, r5, #1
vmov.16 d2[1], r12
vmovl.u8 q0, d0
vmovl.u8 q1, d2
vstr s4, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s5, [r0, #2*\w]
add r0, r0, #2*\stride
bgt 0b
b 3f
1:
// CDEF_HAVE_LEFT+!CDEF_HAVE_RIGHT
vld1.16 {d2[]}, [r3, :16]!
load_n_incr d0, r1, r2, \w
subs r5, r5, #1
vmovl.u8 q0, d0
vmovl.u8 q1, d2
vstr s4, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s12, [r0, #2*\w]
add r0, r0, #2*\stride
bgt 1b
b 3f
2:
tst r6, #2 // CDEF_HAVE_RIGHT
beq 1f
// !CDEF_HAVE_LEFT+CDEF_HAVE_RIGHT
0:
ldrh r12, [r1, #\w]
load_n_incr d0, r1, r2, \w
vdup.16 d2, r12
subs r5, r5, #1
vmovl.u8 q0, d0
vmovl.u8 q1, d2
vstr s12, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s4, [r0, #2*\w]
add r0, r0, #2*\stride
bgt 0b
b 3f
1:
// !CDEF_HAVE_LEFT+!CDEF_HAVE_RIGHT
load_n_incr d0, r1, r2, \w
subs r5, r5, #1
vmovl.u8 q0, d0
vstr s12, [r0, #-4]
vst1.16 {\w1}, [r0, :\align]
vstr s12, [r0, #2*\w]
add r0, r0, #2*\stride
bgt 1b
3:
tst r6, #8 // CDEF_HAVE_BOTTOM
bne 1f
// !CDEF_HAVE_BOTTOM
sub r12, r0, #4
vmov.i16 q2, #0x8000
vst1.16 {q2,q3}, [r12]!
.if \w == 8
vst1.16 {q2,q3}, [r12]!
.endif
pop {r4-r7,pc}
1:
// CDEF_HAVE_BOTTOM
add r7, r1, r2
pad_top_bottom r1, r7, \w, \stride, \n1, \w1, \n2, \w2, \align, 1
endfunc
.endm
padding_func 8, 16, d0, q0, d2, q1, 128
padding_func 4, 8, s0, d0, s4, d2, 64
// void cdef_paddingX_edged_8bpc_neon(uint16_t *tmp, const pixel *src,
// ptrdiff_t src_stride, const pixel (*left)[2],
// const pixel *const top, int h,
// enum CdefEdgeFlags edges);
.macro padding_func_edged w, stride, reg, align
function cdef_padding\w\()_edged_8bpc_neon
sub r0, r0, #(2*\stride)
ldrh r12, [r4, #-2]
vldr \reg, [r4]
add r7, r4, r2
strh r12, [r0, #-2]
ldrh r12, [r4, #\w]
vstr \reg, [r0]
strh r12, [r0, #\w]
ldrh r12, [r7, #-2]
vldr \reg, [r7]
strh r12, [r0, #\stride-2]
ldrh r12, [r7, #\w]
vstr \reg, [r0, #\stride]
strh r12, [r0, #\stride+\w]
add r0, r0, #2*\stride
0:
ldrh r12, [r3], #2
vldr \reg, [r1]
str r12, [r0, #-2]
ldrh r12, [r1, #\w]
add r1, r1, r2
subs r5, r5, #1
vstr \reg, [r0]
str r12, [r0, #\w]
add r0, r0, #\stride
bgt 0b
ldrh r12, [r1, #-2]
vldr \reg, [r1]
add r7, r1, r2
strh r12, [r0, #-2]
ldrh r12, [r1, #\w]
vstr \reg, [r0]
strh r12, [r0, #\w]
ldrh r12, [r7, #-2]
vldr \reg, [r7]
strh r12, [r0, #\stride-2]
ldrh r12, [r7, #\w]
vstr \reg, [r0, #\stride]
strh r12, [r0, #\stride+\w]
pop {r4-r7,pc}
endfunc
.endm
padding_func_edged 8, 16, d0, 64
padding_func_edged 4, 8, s0, 32
tables
filter 8, 8
filter 4, 8
find_dir 8
.macro load_px_8 d11, d12, d21, d22, w
.if \w == 8
add r6, r2, r9 // x + off
sub r9, r2, r9 // x - off
vld1.8 {\d11}, [r6] // p0
add r6, r6, #16 // += stride
vld1.8 {\d21}, [r9] // p1
add r9, r9, #16 // += stride
vld1.8 {\d12}, [r6] // p0
vld1.8 {\d22}, [r9] // p1
.else
add r6, r2, r9 // x + off
sub r9, r2, r9 // x - off
vld1.32 {\d11[0]}, [r6] // p0
add r6, r6, #8 // += stride
vld1.32 {\d21[0]}, [r9] // p1
add r9, r9, #8 // += stride
vld1.32 {\d11[1]}, [r6] // p0
add r6, r6, #8 // += stride
vld1.32 {\d21[1]}, [r9] // p1
add r9, r9, #8 // += stride
vld1.32 {\d12[0]}, [r6] // p0
add r6, r6, #8 // += stride
vld1.32 {\d22[0]}, [r9] // p1
add r9, r9, #8 // += stride
vld1.32 {\d12[1]}, [r6] // p0
vld1.32 {\d22[1]}, [r9] // p1
.endif
.endm
.macro handle_pixel_8 s1, s2, thresh_vec, shift, tap, min
.if \min
vmin.u8 q3, q3, \s1
vmax.u8 q4, q4, \s1
vmin.u8 q3, q3, \s2
vmax.u8 q4, q4, \s2
.endif
vabd.u8 q8, q0, \s1 // abs(diff)
vabd.u8 q11, q0, \s2 // abs(diff)
vshl.u8 q9, q8, \shift // abs(diff) >> shift
vshl.u8 q12, q11, \shift // abs(diff) >> shift
vqsub.u8 q9, \thresh_vec, q9 // clip = imax(0, threshold - (abs(diff) >> shift))
vqsub.u8 q12, \thresh_vec, q12// clip = imax(0, threshold - (abs(diff) >> shift))
vcgt.u8 q10, q0, \s1 // px > p0
vcgt.u8 q13, q0, \s2 // px > p1
vmin.u8 q9, q9, q8 // imin(abs(diff), clip)
vmin.u8 q12, q12, q11 // imin(abs(diff), clip)
vneg.s8 q8, q9 // -imin()
vneg.s8 q11, q12 // -imin()
vbsl q10, q8, q9 // constrain() = imax(imin(diff, clip), -clip)
vdup.8 d18, \tap // taps[k]
vbsl q13, q11, q12 // constrain() = imax(imin(diff, clip), -clip)
vmlal.s8 q1, d20, d18 // sum += taps[k] * constrain()
vmlal.s8 q1, d26, d18 // sum += taps[k] * constrain()
vmlal.s8 q2, d21, d18 // sum += taps[k] * constrain()
vmlal.s8 q2, d27, d18 // sum += taps[k] * constrain()
.endm
// void cdef_filterX_edged_neon(pixel *dst, ptrdiff_t dst_stride,
// const uint16_t *tmp, int pri_strength,
// int sec_strength, int dir, int damping,
// int h, size_t edges);
.macro filter_func_8 w, pri, sec, min, suffix
function cdef_filter\w\suffix\()_edged_neon
.if \pri
movrel_local r8, pri_taps
and r9, r3, #1
add r8, r8, r9, lsl #1
.endif
movrel_local r9, directions\w
add r5, r9, r5, lsl #1
vmov.u8 d17, #7
vdup.8 d16, r6 // damping
vmov.8 d8[0], r3
vmov.8 d8[1], r4
vclz.i8 d8, d8 // clz(threshold)
vsub.i8 d8, d17, d8 // ulog2(threshold)
vqsub.u8 d8, d16, d8 // shift = imax(0, damping - ulog2(threshold))
vneg.s8 d8, d8 // -shift
.if \sec
vdup.8 q6, d8[1]
.endif
.if \pri
vdup.8 q5, d8[0]
.endif
1:
.if \w == 8
add r12, r2, #16
vld1.8 {d0}, [r2, :64] // px
vld1.8 {d1}, [r12, :64] // px
.else
add r12, r2, #8
vld1.32 {d0[0]}, [r2, :32] // px
add r9, r2, #2*8
vld1.32 {d0[1]}, [r12, :32] // px
add r12, r12, #2*8
vld1.32 {d1[0]}, [r9, :32] // px
vld1.32 {d1[1]}, [r12, :32] // px
.endif
vmov.u8 q1, #0 // sum
vmov.u8 q2, #0 // sum
.if \min
vmov.u16 q3, q0 // min
vmov.u16 q4, q0 // max
.endif
// Instead of loading sec_taps 2, 1 from memory, just set it
// to 2 initially and decrease for the second round.
// This is also used as loop counter.
mov lr, #2 // sec_taps[0]
2:
.if \pri
ldrsb r9, [r5] // off1
load_px_8 d28, d29, d30, d31, \w
.endif
.if \sec
add r5, r5, #4 // +2*2
ldrsb r9, [r5] // off2
.endif
.if \pri
ldrb r12, [r8] // *pri_taps
vdup.8 q7, r3 // threshold
handle_pixel_8 q14, q15, q7, q5, r12, \min
.endif
.if \sec
load_px_8 d28, d29, d30, d31, \w
add r5, r5, #8 // +2*4
ldrsb r9, [r5] // off3
vdup.8 q7, r4 // threshold
handle_pixel_8 q14, q15, q7, q6, lr, \min
load_px_8 d28, d29, d30, d31, \w
handle_pixel_8 q14, q15, q7, q6, lr, \min
sub r5, r5, #11 // r5 -= 2*(2+4); r5 += 1;
.else
add r5, r5, #1 // r5 += 1
.endif
subs lr, lr, #1 // sec_tap-- (value)
.if \pri
add r8, r8, #1 // pri_taps++ (pointer)
.endif
bne 2b
vshr.s16 q14, q1, #15 // -(sum < 0)
vshr.s16 q15, q2, #15 // -(sum < 0)
vadd.i16 q1, q1, q14 // sum - (sum < 0)
vadd.i16 q2, q2, q15 // sum - (sum < 0)
vrshr.s16 q1, q1, #4 // (8 + sum - (sum < 0)) >> 4
vrshr.s16 q2, q2, #4 // (8 + sum - (sum < 0)) >> 4
vaddw.u8 q1, q1, d0 // px + (8 + sum ...) >> 4
vaddw.u8 q2, q2, d1 // px + (8 + sum ...) >> 4
vqmovun.s16 d0, q1
vqmovun.s16 d1, q2
.if \min
vmin.u8 q0, q0, q4
vmax.u8 q0, q0, q3 // iclip(px + .., min, max)
.endif
.if \w == 8
vst1.8 {d0}, [r0, :64], r1
add r2, r2, #2*16 // tmp += 2*tmp_stride
subs r7, r7, #2 // h -= 2
vst1.8 {d1}, [r0, :64], r1
.else
vst1.32 {d0[0]}, [r0, :32], r1
add r2, r2, #4*8 // tmp += 4*tmp_stride
vst1.32 {d0[1]}, [r0, :32], r1
subs r7, r7, #4 // h -= 4
vst1.32 {d1[0]}, [r0, :32], r1
vst1.32 {d1[1]}, [r0, :32], r1
.endif
// Reset pri_taps and directions back to the original point
sub r5, r5, #2
.if \pri
sub r8, r8, #2
.endif
bgt 1b
vpop {q4-q7}
pop {r4-r9,pc}
endfunc
.endm
.macro filter_8 w
filter_func_8 \w, pri=1, sec=0, min=0, suffix=_pri
filter_func_8 \w, pri=0, sec=1, min=0, suffix=_sec
filter_func_8 \w, pri=1, sec=1, min=1, suffix=_pri_sec
.endm
filter_8 8
filter_8 4