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aarch64: vp9itxfm: Do separate functions for half/quarter idct16 and idct32 

This work is sponsored by, and copyright, Google.

This avoids loading and calculating coefficients that we know will
be zero, and avoids filling the temp buffer with zeros in places
where we know the second pass won't read.

This gives a pretty substantial speedup for the smaller subpartitions.

The code size increases from 14740 bytes to 24292 bytes.

The idct16/32_end macros are moved above the individual functions; the
instructions themselves are unchanged, but since new functions are added
at the same place where the code is moved from, the diff looks rather
messy.

Before:
vp9_inv_dct_dct_16x16_sub1_add_neon:     236.7
vp9_inv_dct_dct_16x16_sub2_add_neon:    1051.0
vp9_inv_dct_dct_16x16_sub4_add_neon:    1051.0
vp9_inv_dct_dct_16x16_sub8_add_neon:    1051.0
vp9_inv_dct_dct_16x16_sub12_add_neon:   1387.4
vp9_inv_dct_dct_16x16_sub16_add_neon:   1387.6
vp9_inv_dct_dct_32x32_sub1_add_neon:     554.1
vp9_inv_dct_dct_32x32_sub2_add_neon:    5198.5
vp9_inv_dct_dct_32x32_sub4_add_neon:    5198.6
vp9_inv_dct_dct_32x32_sub8_add_neon:    5196.3
vp9_inv_dct_dct_32x32_sub12_add_neon:   6183.4
vp9_inv_dct_dct_32x32_sub16_add_neon:   6174.3
vp9_inv_dct_dct_32x32_sub20_add_neon:   7151.4
vp9_inv_dct_dct_32x32_sub24_add_neon:   7145.3
vp9_inv_dct_dct_32x32_sub28_add_neon:   8119.3
vp9_inv_dct_dct_32x32_sub32_add_neon:   8118.7

After:
vp9_inv_dct_dct_16x16_sub1_add_neon:     236.7
vp9_inv_dct_dct_16x16_sub2_add_neon:     640.8
vp9_inv_dct_dct_16x16_sub4_add_neon:     639.0
vp9_inv_dct_dct_16x16_sub8_add_neon:     842.0
vp9_inv_dct_dct_16x16_sub12_add_neon:   1388.3
vp9_inv_dct_dct_16x16_sub16_add_neon:   1389.3
vp9_inv_dct_dct_32x32_sub1_add_neon:     554.1
vp9_inv_dct_dct_32x32_sub2_add_neon:    3685.5
vp9_inv_dct_dct_32x32_sub4_add_neon:    3685.1
vp9_inv_dct_dct_32x32_sub8_add_neon:    3684.4
vp9_inv_dct_dct_32x32_sub12_add_neon:   5312.2
vp9_inv_dct_dct_32x32_sub16_add_neon:   5315.4
vp9_inv_dct_dct_32x32_sub20_add_neon:   7154.9
vp9_inv_dct_dct_32x32_sub24_add_neon:   7154.5
vp9_inv_dct_dct_32x32_sub28_add_neon:   8126.6
vp9_inv_dct_dct_32x32_sub32_add_neon:   8127.2

Signed-off-by: Martin Storsjö <martin@martin.st>
tags/n3.4
Martin Storsjö 9 years ago
parent
5eb5aec475
commit
a63da4511d
1 changed files with 466 additions and 59 deletions
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  1. +466
    -59
      libavcodec/aarch64/vp9itxfm_neon.S

+ 466
- 59
libavcodec/aarch64/vp9itxfm_neon.S View File

@@ -75,6 +75,17 @@ endconst
.endif
.endm

// Same as dmbutterfly0 above, but treating the input in in2 as zero,
// writing the same output into both out1 and out2.
.macro dmbutterfly0_h out1, out2, in1, in2, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6
smull \tmp1\().4s, \in1\().4h, v0.h[0]
smull2 \tmp2\().4s, \in1\().8h, v0.h[0]
rshrn \out1\().4h, \tmp1\().4s, #14
rshrn2 \out1\().8h, \tmp2\().4s, #14
rshrn \out2\().4h, \tmp1\().4s, #14
rshrn2 \out2\().8h, \tmp2\().4s, #14
.endm

// out1,out2 = in1 * coef1 - in2 * coef2
// out3,out4 = in1 * coef2 + in2 * coef1
// out are 4 x .4s registers, in are 2 x .8h registers
@@ -104,6 +115,43 @@ endconst
rshrn2 \inout2\().8h, \tmp4\().4s, #14
.endm

// Same as dmbutterfly above, but treating the input in inout2 as zero
.macro dmbutterfly_h1 inout1, inout2, coef1, coef2, tmp1, tmp2, tmp3, tmp4
smull \tmp1\().4s, \inout1\().4h, \coef1
smull2 \tmp2\().4s, \inout1\().8h, \coef1
smull \tmp3\().4s, \inout1\().4h, \coef2
smull2 \tmp4\().4s, \inout1\().8h, \coef2
rshrn \inout1\().4h, \tmp1\().4s, #14
rshrn2 \inout1\().8h, \tmp2\().4s, #14
rshrn \inout2\().4h, \tmp3\().4s, #14
rshrn2 \inout2\().8h, \tmp4\().4s, #14
.endm

// Same as dmbutterfly above, but treating the input in inout1 as zero
.macro dmbutterfly_h2 inout1, inout2, coef1, coef2, tmp1, tmp2, tmp3, tmp4
smull \tmp1\().4s, \inout2\().4h, \coef2
smull2 \tmp2\().4s, \inout2\().8h, \coef2
smull \tmp3\().4s, \inout2\().4h, \coef1
smull2 \tmp4\().4s, \inout2\().8h, \coef1
neg \tmp1\().4s, \tmp1\().4s
neg \tmp2\().4s, \tmp2\().4s
rshrn \inout2\().4h, \tmp3\().4s, #14
rshrn2 \inout2\().8h, \tmp4\().4s, #14
rshrn \inout1\().4h, \tmp1\().4s, #14
rshrn2 \inout1\().8h, \tmp2\().4s, #14
.endm

.macro dsmull_h out1, out2, in, coef
smull \out1\().4s, \in\().4h, \coef
smull2 \out2\().4s, \in\().8h, \coef
.endm

.macro drshrn_h out, in1, in2, shift
rshrn \out\().4h, \in1\().4s, \shift
rshrn2 \out\().8h, \in2\().4s, \shift
.endm


// out1 = in1 + in2
// out2 = in1 - in2
.macro butterfly_8h out1, out2, in1, in2
@@ -463,6 +511,30 @@ function idct16x16_dc_add_neon
ret
endfunc

.macro idct16_end
butterfly_8h v18, v7, v4, v7 // v18 = t0a, v7 = t7a
butterfly_8h v19, v22, v5, v22 // v19 = t1a, v22 = t6
butterfly_8h v4, v26, v20, v26 // v4 = t2a, v26 = t5
butterfly_8h v5, v6, v28, v6 // v5 = t3a, v6 = t4
butterfly_8h v20, v28, v16, v24 // v20 = t8a, v28 = t11a
butterfly_8h v24, v21, v23, v21 // v24 = t9, v21 = t10
butterfly_8h v23, v27, v25, v27 // v23 = t14, v27 = t13
butterfly_8h v25, v29, v29, v17 // v25 = t15a, v29 = t12a

dmbutterfly0 v2, v3, v27, v21, v2, v3, v16, v17, v30, v31 // v2 = t13a, v3 = t10a
dmbutterfly0 v28, v27, v29, v28, v21, v29, v16, v17, v30, v31 // v28 = t12, v27 = t11

butterfly_8h v16, v31, v18, v25 // v16 = out[0], v31 = out[15]
butterfly_8h v17, v30, v19, v23 // v17 = out[1], v30 = out[14]
butterfly_8h_r v25, v22, v22, v24 // v25 = out[9], v22 = out[6]
butterfly_8h v23, v24, v7, v20 // v23 = out[7], v24 = out[8]
butterfly_8h v18, v29, v4, v2 // v18 = out[2], v29 = out[13]
butterfly_8h v19, v28, v5, v28 // v19 = out[3], v28 = out[12]
butterfly_8h v20, v27, v6, v27 // v20 = out[4], v27 = out[11]
butterfly_8h v21, v26, v26, v3 // v21 = out[5], v26 = out[10]
ret
.endm

function idct16
dmbutterfly0 v16, v24, v16, v24, v2, v3, v4, v5, v6, v7 // v16 = t0a, v24 = t1a
dmbutterfly v20, v28, v0.h[1], v0.h[2], v2, v3, v4, v5 // v20 = t2a, v28 = t3a
@@ -485,28 +557,65 @@ function idct16
dmbutterfly0 v22, v26, v22, v26, v2, v3, v18, v19, v30, v31 // v22 = t6a, v26 = t5a
dmbutterfly v23, v25, v0.h[1], v0.h[2], v18, v19, v30, v31 // v23 = t9a, v25 = t14a
dmbutterfly v27, v21, v0.h[1], v0.h[2], v18, v19, v30, v31, neg=1 // v27 = t13a, v21 = t10a
idct16_end
endfunc

butterfly_8h v18, v7, v4, v7 // v18 = t0a, v7 = t7a
butterfly_8h v19, v22, v5, v22 // v19 = t1a, v22 = t6
butterfly_8h v4, v26, v20, v26 // v4 = t2a, v26 = t5
butterfly_8h v5, v6, v28, v6 // v5 = t3a, v6 = t4
butterfly_8h v20, v28, v16, v24 // v20 = t8a, v28 = t11a
butterfly_8h v24, v21, v23, v21 // v24 = t9, v21 = t10
butterfly_8h v23, v27, v25, v27 // v23 = t14, v27 = t13
butterfly_8h v25, v29, v29, v17 // v25 = t15a, v29 = t12a
function idct16_half
dmbutterfly0_h v16, v24, v16, v24, v2, v3, v4, v5, v6, v7 // v16 = t0a, v24 = t1a
dmbutterfly_h1 v20, v28, v0.h[1], v0.h[2], v2, v3, v4, v5 // v20 = t2a, v28 = t3a
dmbutterfly_h1 v18, v30, v0.h[3], v0.h[4], v2, v3, v4, v5 // v18 = t4a, v30 = t7a
dmbutterfly_h2 v26, v22, v0.h[5], v0.h[6], v2, v3, v4, v5 // v26 = t5a, v22 = t6a
dmbutterfly_h1 v17, v31, v0.h[7], v1.h[0], v2, v3, v4, v5 // v17 = t8a, v31 = t15a
dmbutterfly_h2 v25, v23, v1.h[1], v1.h[2], v2, v3, v4, v5 // v25 = t9a, v23 = t14a
dmbutterfly_h1 v21, v27, v1.h[3], v1.h[4], v2, v3, v4, v5 // v21 = t10a, v27 = t13a
dmbutterfly_h2 v29, v19, v1.h[5], v1.h[6], v2, v3, v4, v5 // v29 = t11a, v19 = t12a

dmbutterfly0 v2, v3, v27, v21, v2, v3, v16, v17, v30, v31 // v2 = t13a, v3 = t10a
dmbutterfly0 v28, v27, v29, v28, v21, v29, v16, v17, v30, v31 // v28 = t12, v27 = t11
butterfly_8h v4, v28, v16, v28 // v4 = t0, v28 = t3
butterfly_8h v5, v20, v24, v20 // v5 = t1, v20 = t2
butterfly_8h v6, v26, v18, v26 // v6 = t4, v26 = t5
butterfly_8h v7, v22, v30, v22 // v7 = t7, v22 = t6
butterfly_8h v16, v25, v17, v25 // v16 = t8, v25 = t9
butterfly_8h v24, v21, v29, v21 // v24 = t11, v21 = t10
butterfly_8h v17, v27, v19, v27 // v17 = t12, v27 = t13
butterfly_8h v29, v23, v31, v23 // v29 = t15, v23 = t14

butterfly_8h v16, v31, v18, v25 // v16 = out[0], v31 = out[15]
butterfly_8h v17, v30, v19, v23 // v17 = out[1], v30 = out[14]
butterfly_8h_r v25, v22, v22, v24 // v25 = out[9], v22 = out[6]
butterfly_8h v23, v24, v7, v20 // v23 = out[7], v24 = out[8]
butterfly_8h v18, v29, v4, v2 // v18 = out[2], v29 = out[13]
butterfly_8h v19, v28, v5, v28 // v19 = out[3], v28 = out[12]
butterfly_8h v20, v27, v6, v27 // v20 = out[4], v27 = out[11]
butterfly_8h v21, v26, v26, v3 // v21 = out[5], v26 = out[10]
ret
dmbutterfly0 v22, v26, v22, v26, v2, v3, v18, v19, v30, v31 // v22 = t6a, v26 = t5a
dmbutterfly v23, v25, v0.h[1], v0.h[2], v18, v19, v30, v31 // v23 = t9a, v25 = t14a
dmbutterfly v27, v21, v0.h[1], v0.h[2], v18, v19, v30, v31, neg=1 // v27 = t13a, v21 = t10a
idct16_end
endfunc

function idct16_quarter
dsmull_h v24, v25, v19, v1.h[6]
dsmull_h v4, v5, v17, v0.h[7]
dsmull_h v7, v6, v18, v0.h[4]
dsmull_h v30, v31, v18, v0.h[3]
neg v24.4s, v24.4s
neg v25.4s, v25.4s
dsmull_h v29, v28, v17, v1.h[0]
dsmull_h v26, v27, v19, v1.h[5]
dsmull_h v22, v23, v16, v0.h[0]
drshrn_h v24, v24, v25, #14
drshrn_h v16, v4, v5, #14
drshrn_h v7, v7, v6, #14
drshrn_h v6, v30, v31, #14
drshrn_h v29, v29, v28, #14
drshrn_h v17, v26, v27, #14
drshrn_h v28, v22, v23, #14

dmbutterfly_l v20, v21, v22, v23, v17, v24, v0.h[1], v0.h[2]
dmbutterfly_l v18, v19, v30, v31, v29, v16, v0.h[1], v0.h[2]
neg v22.4s, v22.4s
neg v23.4s, v23.4s
drshrn_h v27, v20, v21, #14
drshrn_h v21, v22, v23, #14
drshrn_h v23, v18, v19, #14
drshrn_h v25, v30, v31, #14
mov v4.16b, v28.16b
mov v5.16b, v28.16b
dmbutterfly0 v22, v26, v7, v6, v18, v19, v30, v31
mov v20.16b, v28.16b
idct16_end
endfunc

function iadst16
@@ -756,6 +865,13 @@ function ff_vp9_\txfm1\()_\txfm2\()_16x16_add_neon, export=1
.endif
mov x9, #32

.ifc \txfm1\()_\txfm2,idct_idct
cmp w3, #10
b.le idct16x16_quarter_add_neon
cmp w3, #38
b.le idct16x16_half_add_neon
.endif

.irp i, 0, 8
add x0, sp, #(\i*32)
.ifc \txfm1\()_\txfm2,idct_idct
@@ -812,6 +928,116 @@ itxfm_func16x16 iadst, idct
itxfm_func16x16 idct, iadst
itxfm_func16x16 iadst, iadst

function idct16_1d_8x16_pass1_quarter_neon
mov x14, x30
movi v2.8h, #0
.irp i, 16, 17, 18, 19
load_clear \i, x2, x9
.endr

bl idct16_quarter

// Do two 8x8 transposes. Originally, v16-v31 contain the
// 16 rows. Afterwards, v16-v23 and v24-v31 contain the two
// transposed 8x8 blocks.
transpose_8x8H v16, v17, v18, v19, v20, v21, v22, v23, v2, v3
transpose_8x8H v24, v25, v26, v27, v28, v29, v30, v31, v2, v3

// Store the transposed 8x8 blocks horizontally.
// The first 8x8 block is kept in registers for the second pass,
// store the rest in the temp buffer.
// Since only a 4x4 part of the input was nonzero, this means that
// only 4 rows are nonzero after transposing, and the second pass
// only reads the topmost 4 rows. Therefore only store the topmost
// 4 rows.
add x0, x0, #16
.irp i, 24, 25, 26, 27
store \i, x0, x9
.endr
br x14
endfunc

function idct16_1d_8x16_pass2_quarter_neon
mov x14, x30
cbz x3, 1f
.irp i, 16, 17, 18, 19
load \i, x2, x9
.endr
1:

add x3, x0, x1
lsl x1, x1, #1
bl idct16_quarter

load_add_store v16.8h, v17.8h, v18.8h, v19.8h, v20.8h, v21.8h, v22.8h, v23.8h, v16.8b, v17.8b
load_add_store v24.8h, v25.8h, v26.8h, v27.8h, v28.8h, v29.8h, v30.8h, v31.8h, v16.8b, v17.8b

br x14
endfunc

function idct16_1d_8x16_pass1_half_neon
mov x14, x30
movi v2.8h, #0
.irp i, 16, 17, 18, 19, 20, 21, 22, 23
load_clear \i, x2, x9
.endr

bl idct16_half

// Do two 8x8 transposes. Originally, v16-v31 contain the
// 16 rows. Afterwards, v16-v23 and v24-v31 contain the two
// transposed 8x8 blocks.
transpose_8x8H v16, v17, v18, v19, v20, v21, v22, v23, v2, v3
transpose_8x8H v24, v25, v26, v27, v28, v29, v30, v31, v2, v3

// Store the transposed 8x8 blocks horizontally.
// The first 8x8 block is kept in registers for the second pass,
// store the rest in the temp buffer.
add x0, x0, #16
.irp i, 24, 25, 26, 27, 28, 29, 30, 31
store \i, x0, x9
.endr
br x14
endfunc

function idct16_1d_8x16_pass2_half_neon
mov x14, x30
cbz x3, 1f
.irp i, 16, 17, 18, 19, 20, 21, 22, 23
load \i, x2, x9
.endr
1:

add x3, x0, x1
lsl x1, x1, #1
bl idct16_half

load_add_store v16.8h, v17.8h, v18.8h, v19.8h, v20.8h, v21.8h, v22.8h, v23.8h, v16.8b, v17.8b
load_add_store v24.8h, v25.8h, v26.8h, v27.8h, v28.8h, v29.8h, v30.8h, v31.8h, v16.8b, v17.8b

br x14
endfunc

.macro idct16_partial size
function idct16x16_\size\()_add_neon
add x0, sp, #(0*32)
add x2, x6, #(0*2)
bl idct16_1d_8x16_pass1_\size\()_neon
.irp i, 0, 8
add x0, x4, #(\i)
mov x1, x5
add x2, sp, #(\i*2)
mov x3, #\i
bl idct16_1d_8x16_pass2_\size\()_neon
.endr

add sp, sp, #512
br x15
endfunc
.endm

idct16_partial quarter
idct16_partial half

function idct32x32_dc_add_neon
movrel x4, idct_coeffs
@@ -848,6 +1074,37 @@ function idct32x32_dc_add_neon
ret
endfunc

.macro idct32_end
butterfly_8h v16, v5, v4, v5 // v16 = t16a, v5 = t19a
butterfly_8h v17, v20, v23, v20 // v17 = t17, v20 = t18
butterfly_8h v18, v6, v7, v6 // v18 = t23a, v6 = t20a
butterfly_8h v19, v21, v22, v21 // v19 = t22, v21 = t21
butterfly_8h v4, v28, v28, v30 // v4 = t24a, v28 = t27a
butterfly_8h v23, v26, v25, v26 // v23 = t25, v26 = t26
butterfly_8h v7, v3, v29, v31 // v7 = t31a, v3 = t28a
butterfly_8h v22, v27, v24, v27 // v22 = t30, v27 = t29

dmbutterfly v27, v20, v0.h[1], v0.h[2], v24, v25, v30, v31 // v27 = t18a, v20 = t29a
dmbutterfly v3, v5, v0.h[1], v0.h[2], v24, v25, v30, v31 // v3 = t19, v5 = t28
dmbutterfly v28, v6, v0.h[1], v0.h[2], v24, v25, v30, v31, neg=1 // v28 = t27, v6 = t20
dmbutterfly v26, v21, v0.h[1], v0.h[2], v24, v25, v30, v31, neg=1 // v26 = t26a, v21 = t21a

butterfly_8h v31, v24, v7, v4 // v31 = t31, v24 = t24
butterfly_8h v30, v25, v22, v23 // v30 = t30a, v25 = t25a
butterfly_8h_r v23, v16, v16, v18 // v23 = t23, v16 = t16
butterfly_8h_r v22, v17, v17, v19 // v22 = t22a, v17 = t17a
butterfly_8h v18, v21, v27, v21 // v18 = t18, v21 = t21
butterfly_8h_r v27, v28, v5, v28 // v27 = t27a, v28 = t28a
butterfly_8h v29, v26, v20, v26 // v29 = t29, v26 = t26
butterfly_8h v19, v20, v3, v6 // v19 = t19a, v20 = t20

dmbutterfly0 v27, v20, v27, v20, v2, v3, v4, v5, v6, v7 // v27 = t27, v20 = t20
dmbutterfly0 v26, v21, v26, v21, v2, v3, v4, v5, v6, v7 // v26 = t26a, v21 = t21a
dmbutterfly0 v25, v22, v25, v22, v2, v3, v4, v5, v6, v7 // v25 = t25, v22 = t22
dmbutterfly0 v24, v23, v24, v23, v2, v3, v4, v5, v6, v7 // v24 = t24a, v23 = t23a
ret
.endm

function idct32_odd
ld1 {v0.8h,v1.8h}, [x11]

@@ -875,37 +1132,88 @@ function idct32_odd
dmbutterfly v27, v20, v0.h[3], v0.h[4], v16, v17, v18, v19, neg=1 // v27 = t29a, v20 = t18a
dmbutterfly v21, v26, v0.h[5], v0.h[6], v16, v17, v18, v19 // v21 = t21a, v26 = t26a
dmbutterfly v25, v22, v0.h[5], v0.h[6], v16, v17, v18, v19, neg=1 // v25 = t25a, v22 = t22a
idct32_end
endfunc

butterfly_8h v16, v5, v4, v5 // v16 = t16a, v5 = t19a
butterfly_8h v17, v20, v23, v20 // v17 = t17, v20 = t18
butterfly_8h v18, v6, v7, v6 // v18 = t23a, v6 = t20a
butterfly_8h v19, v21, v22, v21 // v19 = t22, v21 = t21
butterfly_8h v4, v28, v28, v30 // v4 = t24a, v28 = t27a
butterfly_8h v23, v26, v25, v26 // v23 = t25, v26 = t26
butterfly_8h v7, v3, v29, v31 // v7 = t31a, v3 = t28a
butterfly_8h v22, v27, v24, v27 // v22 = t30, v27 = t29
function idct32_odd_half
ld1 {v0.8h,v1.8h}, [x11]

dmbutterfly v27, v20, v0.h[1], v0.h[2], v24, v25, v30, v31 // v27 = t18a, v20 = t29a
dmbutterfly v3, v5, v0.h[1], v0.h[2], v24, v25, v30, v31 // v3 = t19, v5 = t28
dmbutterfly v28, v6, v0.h[1], v0.h[2], v24, v25, v30, v31, neg=1 // v28 = t27, v6 = t20
dmbutterfly v26, v21, v0.h[1], v0.h[2], v24, v25, v30, v31, neg=1 // v26 = t26a, v21 = t21a
dmbutterfly_h1 v16, v31, v0.h[0], v0.h[1], v4, v5, v6, v7 // v16 = t16a, v31 = t31a
dmbutterfly_h2 v24, v23, v0.h[2], v0.h[3], v4, v5, v6, v7 // v24 = t17a, v23 = t30a
dmbutterfly_h1 v20, v27, v0.h[4], v0.h[5], v4, v5, v6, v7 // v20 = t18a, v27 = t29a
dmbutterfly_h2 v28, v19, v0.h[6], v0.h[7], v4, v5, v6, v7 // v28 = t19a, v19 = t28a
dmbutterfly_h1 v18, v29, v1.h[0], v1.h[1], v4, v5, v6, v7 // v18 = t20a, v29 = t27a
dmbutterfly_h2 v26, v21, v1.h[2], v1.h[3], v4, v5, v6, v7 // v26 = t21a, v21 = t26a
dmbutterfly_h1 v22, v25, v1.h[4], v1.h[5], v4, v5, v6, v7 // v22 = t22a, v25 = t25a
dmbutterfly_h2 v30, v17, v1.h[6], v1.h[7], v4, v5, v6, v7 // v30 = t23a, v17 = t24a

butterfly_8h v31, v24, v7, v4 // v31 = t31, v24 = t24
butterfly_8h v30, v25, v22, v23 // v30 = t30a, v25 = t25a
butterfly_8h_r v23, v16, v16, v18 // v23 = t23, v16 = t16
butterfly_8h_r v22, v17, v17, v19 // v22 = t22a, v17 = t17a
butterfly_8h v18, v21, v27, v21 // v18 = t18, v21 = t21
butterfly_8h_r v27, v28, v5, v28 // v27 = t27a, v28 = t28a
butterfly_8h v29, v26, v20, v26 // v29 = t29, v26 = t26
butterfly_8h v19, v20, v3, v6 // v19 = t19a, v20 = t20
ld1 {v0.8h}, [x10]

dmbutterfly0 v27, v20, v27, v20, v2, v3, v4, v5, v6, v7 // v27 = t27, v20 = t20
dmbutterfly0 v26, v21, v26, v21, v2, v3, v4, v5, v6, v7 // v26 = t26a, v21 = t21a
dmbutterfly0 v25, v22, v25, v22, v2, v3, v4, v5, v6, v7 // v25 = t25, v22 = t22
dmbutterfly0 v24, v23, v24, v23, v2, v3, v4, v5, v6, v7 // v24 = t24a, v23 = t23a
ret
butterfly_8h v4, v24, v16, v24 // v4 = t16, v24 = t17
butterfly_8h v5, v20, v28, v20 // v5 = t19, v20 = t18
butterfly_8h v6, v26, v18, v26 // v6 = t20, v26 = t21
butterfly_8h v7, v22, v30, v22 // v7 = t23, v22 = t22
butterfly_8h v28, v25, v17, v25 // v28 = t24, v25 = t25
butterfly_8h v30, v21, v29, v21 // v30 = t27, v21 = t26
butterfly_8h v29, v23, v31, v23 // v29 = t31, v23 = t30
butterfly_8h v31, v27, v19, v27 // v31 = t28, v27 = t29

dmbutterfly v23, v24, v0.h[3], v0.h[4], v16, v17, v18, v19 // v23 = t17a, v24 = t30a
dmbutterfly v27, v20, v0.h[3], v0.h[4], v16, v17, v18, v19, neg=1 // v27 = t29a, v20 = t18a
dmbutterfly v21, v26, v0.h[5], v0.h[6], v16, v17, v18, v19 // v21 = t21a, v26 = t26a
dmbutterfly v25, v22, v0.h[5], v0.h[6], v16, v17, v18, v19, neg=1 // v25 = t25a, v22 = t22a
idct32_end
endfunc

function idct32_odd_quarter
ld1 {v0.8h,v1.8h}, [x11]

dsmull_h v4, v5, v16, v0.h[0]
dsmull_h v28, v29, v19, v0.h[7]
dsmull_h v30, v31, v16, v0.h[1]
dsmull_h v22, v23, v17, v1.h[6]
dsmull_h v7, v6, v17, v1.h[7]
dsmull_h v26, v27, v19, v0.h[6]
dsmull_h v20, v21, v18, v1.h[0]
dsmull_h v24, v25, v18, v1.h[1]

ld1 {v0.8h}, [x10]

neg v28.4s, v28.4s
neg v29.4s, v29.4s
neg v7.4s, v7.4s
neg v6.4s, v6.4s

drshrn_h v4, v4, v5, #14
drshrn_h v5, v28, v29, #14
drshrn_h v29, v30, v31, #14
drshrn_h v28, v22, v23, #14
drshrn_h v7, v7, v6, #14
drshrn_h v31, v26, v27, #14
drshrn_h v6, v20, v21, #14
drshrn_h v30, v24, v25, #14

dmbutterfly_l v16, v17, v18, v19, v29, v4, v0.h[3], v0.h[4]
dmbutterfly_l v27, v26, v20, v21, v31, v5, v0.h[3], v0.h[4]
drshrn_h v23, v16, v17, #14
drshrn_h v24, v18, v19, #14
neg v20.4s, v20.4s
neg v21.4s, v21.4s
drshrn_h v27, v27, v26, #14
drshrn_h v20, v20, v21, #14
dmbutterfly_l v16, v17, v18, v19, v30, v6, v0.h[5], v0.h[6]
drshrn_h v21, v16, v17, #14
drshrn_h v26, v18, v19, #14
dmbutterfly_l v16, v17, v18, v19, v28, v7, v0.h[5], v0.h[6]
drshrn_h v25, v16, v17, #14
neg v18.4s, v18.4s
neg v19.4s, v19.4s
drshrn_h v22, v18, v19, #14

idct32_end
endfunc

.macro idct32_funcs suffix
// Do an 32-point IDCT of a 8x32 slice out of a 32x32 matrix.
// The 32-point IDCT can be decomposed into two 16-point IDCTs;
// a normal IDCT16 with every other input component (the even ones, with
@@ -917,19 +1225,30 @@ endfunc
// x9 = double input stride
// x10 = idct_coeffs
// x11 = idct_coeffs + 32
function idct32_1d_8x32_pass1_neon
function idct32_1d_8x32_pass1\suffix\()_neon
mov x14, x30
ld1 {v0.8h,v1.8h}, [x10]

movi v4.8h, #0
movi v2.8h, #0

// v16 = IN(0), v17 = IN(2) ... v31 = IN(30)
.ifb \suffix
.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
ld1 {v\i\().8h}, [x2]
st1 {v4.8h}, [x2], x9
load_clear \i, x2, x9
.endr
.endif
.ifc \suffix,_quarter
.irp i, 16, 17, 18, 19
load_clear \i, x2, x9
.endr
.endif
.ifc \suffix,_half
.irp i, 16, 17, 18, 19, 20, 21, 22, 23
load_clear \i, x2, x9
.endr
.endif

bl idct16
bl idct16\suffix

// Do two 8x8 transposes. Originally, v16-v31 contain the
// 16 rows. Afterwards, v16-v23 and v24-v31 contain the
@@ -964,17 +1283,36 @@ function idct32_1d_8x32_pass1_neon

// Move x2 back to the start of the input, and move
// to the first odd row
.ifb \suffix
sub x2, x2, x9, lsl #4
.endif
.ifc \suffix,_quarter
sub x2, x2, x9, lsl #2
.endif
.ifc \suffix,_half
sub x2, x2, x9, lsl #3
.endif
add x2, x2, #64

movi v4.8h, #0
movi v2.8h, #0
// v16 = IN(1), v17 = IN(3) ... v31 = IN(31)
.ifb \suffix
.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
ld1 {v\i\().8h}, [x2]
st1 {v4.8h}, [x2], x9
load_clear \i, x2, x9
.endr
.endif
.ifc \suffix,_quarter
.irp i, 16, 17, 18, 19
load_clear \i, x2, x9
.endr
.endif
.ifc \suffix,_half
.irp i, 16, 17, 18, 19, 20, 21, 22, 23
load_clear \i, x2, x9
.endr
.endif

bl idct32_odd
bl idct32_odd\suffix

transpose_8x8H v31, v30, v29, v28, v27, v26, v25, v24, v2, v3
transpose_8x8H v23, v22, v21, v20, v19, v18, v17, v16, v2, v3
@@ -1023,33 +1361,61 @@ endfunc
// x9 = double temp buffer stride
// x10 = idct_coeffs
// x11 = idct_coeffs + 32
function idct32_1d_8x32_pass2_neon
function idct32_1d_8x32_pass2\suffix\()_neon
mov x14, x30
ld1 {v0.8h,v1.8h}, [x10]

// v16 = IN(0), v17 = IN(2) ... v31 = IN(30)
.ifb \suffix
.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
ld1 {v\i\().8h}, [x2], x9
load \i, x2, x9
.endr
sub x2, x2, x9, lsl #4
.endif
.ifc \suffix,_quarter
.irp i, 16, 17, 18, 19
load \i, x2, x9
.endr
sub x2, x2, x9, lsl #2
.endif
.ifc \suffix,_half
.irp i, 16, 17, 18, 19, 20, 21, 22, 23
load \i, x2, x9
.endr
sub x2, x2, x9, lsl #3
.endif

bl idct16
bl idct16\suffix

.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
st1 {v\i\().8h}, [x2], x9
store \i, x2, x9
.endr

sub x2, x2, x9, lsl #4
add x2, x2, #64

// v16 = IN(1), v17 = IN(3) ... v31 = IN(31)
.ifb \suffix
.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
ld1 {v\i\().8h}, [x2], x9
load \i, x2, x9
.endr
sub x2, x2, x9, lsl #4
.endif
.ifc \suffix,_quarter
.irp i, 16, 17, 18, 19
load \i, x2, x9
.endr
sub x2, x2, x9, lsl #2
.endif
.ifc \suffix,_half
.irp i, 16, 17, 18, 19, 20, 21, 22, 23
load \i, x2, x9
.endr
sub x2, x2, x9, lsl #3
.endif
sub x2, x2, #64

bl idct32_odd
bl idct32_odd\suffix

.macro load_acc_store a, b, c, d, neg=0
.if \neg == 0
@@ -1105,6 +1471,11 @@ function idct32_1d_8x32_pass2_neon
.purgem load_acc_store
br x14
endfunc
.endm

idct32_funcs
idct32_funcs _quarter
idct32_funcs _half

const min_eob_idct_idct_32, align=4
.short 0, 34, 135, 336
@@ -1135,6 +1506,11 @@ function ff_vp9_idct_idct_32x32_add_neon, export=1
mov x9, #128
neg x7, x9

cmp w3, #34
b.le idct32x32_quarter_add_neon
cmp w3, #135
b.le idct32x32_half_add_neon

.irp i, 0, 8, 16, 24
add x0, sp, #(\i*64)
.if \i > 0
@@ -1177,3 +1553,34 @@ function ff_vp9_idct_idct_32x32_add_neon, export=1

br x15
endfunc

.macro idct32_partial size
function idct32x32_\size\()_add_neon
add x0, sp, #(0*64)
add x2, x6, #(0*2)
bl idct32_1d_8x32_pass1_\size\()_neon
.ifc \size,half
add x0, sp, #(8*64)
add x2, x6, #(8*2)
bl idct32_1d_8x32_pass1_\size\()_neon
.endif
.irp i, 0, 8, 16, 24
add x0, x4, #(\i)
mov x1, x5
add x2, sp, #(\i*2)
bl idct32_1d_8x32_pass2_\size\()_neon
.endr

add sp, sp, #2048

ldp d8, d9, [sp], 0x10
ldp d10, d11, [sp], 0x10
ldp d12, d13, [sp], 0x10
ldp d14, d15, [sp], 0x10

br x15
endfunc
.endm

idct32_partial quarter
idct32_partial half

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