ffmpeg/libavcodec/arm/hevcdsp_idct_neon.S

633 lines
20 KiB
ArmAsm

/*
* ARM NEON optimised IDCT functions for HEVC decoding
* Copyright (c) 2014 Seppo Tomperi <seppo.tomperi@vtt.fi>
* Copyright (c) 2017 Alexandra Hájková
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/arm/asm.S"
const trans, align=4
.short 64, 83, 64, 36
.short 89, 75, 50, 18
.short 90, 87, 80, 70
.short 57, 43, 25, 9
endconst
function ff_hevc_idct_4x4_dc_neon_8, export=1
ldrsh r1, [r0]
ldr r2, =0x20
add r1, #1
asr r1, #1
add r1, r2
asr r1, #6
vdup.16 q0, r1
vdup.16 q1, r1
vst1.16 {q0, q1}, [r0]
bx lr
endfunc
function ff_hevc_idct_8x8_dc_neon_8, export=1
ldrsh r1, [r0]
ldr r2, =0x20
add r1, #1
asr r1, #1
add r1, r2
asr r1, #6
vdup.16 q8, r1
vdup.16 q9, r1
vmov.16 q10, q8
vmov.16 q11, q8
vmov.16 q12, q8
vmov.16 q13, q8
vmov.16 q14, q8
vmov.16 q15, q8
vstm r0, {q8-q15}
bx lr
endfunc
function ff_hevc_idct_16x16_dc_neon_8, export=1
ldrsh r1, [r0]
ldr r2, =0x20
add r1, #1
asr r1, #1
add r1, r2
asr r1, #6
vdup.16 q8, r1
vdup.16 q9, r1
vmov.16 q10, q8
vmov.16 q11, q8
vmov.16 q12, q8
vmov.16 q13, q8
vmov.16 q14, q8
vmov.16 q15, q8
vstm r0!, {q8-q15}
vstm r0!, {q8-q15}
vstm r0!, {q8-q15}
vstm r0, {q8-q15}
bx lr
endfunc
function ff_hevc_idct_32x32_dc_neon_8, export=1
ldrsh r1, [r0]
ldr r2, =0x20
add r1, #1
asr r1, #1
add r1, r2
asr r1, #6
mov r3, #16
vdup.16 q8, r1
vdup.16 q9, r1
vmov.16 q10, q8
vmov.16 q11, q8
vmov.16 q12, q8
vmov.16 q13, q8
vmov.16 q14, q8
vmov.16 q15, q8
1: subs r3, #1
vstm r0!, {q8-q15}
bne 1b
bx lr
endfunc
function ff_hevc_add_residual_4x4_neon_8, export=1
vldm r1, {q0-q1}
vld1.32 d4[0], [r0], r2
vld1.32 d4[1], [r0], r2
vld1.32 d5[0], [r0], r2
vld1.32 d5[1], [r0], r2
sub r0, r0, r2, lsl #2
vmovl.u8 q8, d4
vmovl.u8 q9, d5
vqadd.s16 q0, q0, q8
vqadd.s16 q1, q1, q9
vqmovun.s16 d0, q0
vqmovun.s16 d1, q1
vst1.32 d0[0], [r0], r2
vst1.32 d0[1], [r0], r2
vst1.32 d1[0], [r0], r2
vst1.32 d1[1], [r0], r2
bx lr
endfunc
function ff_hevc_add_residual_8x8_neon_8, export=1
mov r3, #8
1: subs r3, #1
vld1.16 {q0}, [r1]!
vld1.8 d16, [r0]
vmovl.u8 q8, d16
vqadd.s16 q0, q8
vqmovun.s16 d0, q0
vst1.32 d0, [r0], r2
bne 1b
bx lr
endfunc
function ff_hevc_add_residual_16x16_neon_8, export=1
mov r3, #16
1: subs r3, #1
vld1.16 {q0, q1}, [r1]!
vld1.8 {q8}, [r0]
vmovl.u8 q9, d16
vmovl.u8 q10, d17
vqadd.s16 q0, q9
vqadd.s16 q1, q10
vqmovun.s16 d0, q0
vqmovun.s16 d1, q1
vst1.8 {q0}, [r0], r2
bne 1b
bx lr
endfunc
function ff_hevc_add_residual_32x32_neon_8, export=1
mov r3, #32
1: subs r3, #1
vldm r1!, {q0-q3}
vld1.8 {q8, q9}, [r0]
vmovl.u8 q10, d16
vmovl.u8 q11, d17
vmovl.u8 q12, d18
vmovl.u8 q13, d19
vqadd.s16 q0, q10
vqadd.s16 q1, q11
vqadd.s16 q2, q12
vqadd.s16 q3, q13
vqmovun.s16 d0, q0
vqmovun.s16 d1, q1
vqmovun.s16 d2, q2
vqmovun.s16 d3, q3
vst1.8 {q0, q1}, [r0], r2
bne 1b
bx lr
endfunc
/* uses registers q2 - q9 for temp values */
/* TODO: reorder */
.macro tr4_luma_shift r0, r1, r2, r3, shift
vaddl.s16 q5, \r0, \r2 // c0 = src0 + src2
vaddl.s16 q2, \r2, \r3 // c1 = src2 + src3
vsubl.s16 q4, \r0, \r3 // c2 = src0 - src3
vmull.s16 q6, \r1, d0[0] // c3 = 74 * src1
vaddl.s16 q7, \r0, \r3 // src0 + src3
vsubw.s16 q7, q7, \r2 // src0 - src2 + src3
vmul.s32 q7, q7, d0[0] // dst2 = 74 * (src0 - src2 + src3)
vmul.s32 q8, q5, d0[1] // 29 * c0
vmul.s32 q9, q2, d1[0] // 55 * c1
vadd.s32 q8, q9 // 29 * c0 + 55 * c1
vadd.s32 q8, q6 // dst0 = 29 * c0 + 55 * c1 + c3
vmul.s32 q2, q2, d0[1] // 29 * c1
vmul.s32 q9, q4, d1[0] // 55 * c2
vsub.s32 q9, q2 // 55 * c2 - 29 * c1
vadd.s32 q9, q6 // dst1 = 55 * c2 - 29 * c1 + c3
vmul.s32 q5, q5, d1[0] // 55 * c0
vmul.s32 q4, q4, d0[1] // 29 * c2
vadd.s32 q5, q4 // 55 * c0 + 29 * c2
vsub.s32 q5, q6 // dst3 = 55 * c0 + 29 * c2 - c3
vqrshrn.s32 \r0, q8, \shift
vqrshrn.s32 \r1, q9, \shift
vqrshrn.s32 \r2, q7, \shift
vqrshrn.s32 \r3, q5, \shift
.endm
function ff_hevc_transform_luma_4x4_neon_8, export=1
vpush {d8-d15}
vld1.16 {q14, q15}, [r0] // coeffs
ldr r3, =0x4a // 74
vmov.32 d0[0], r3
ldr r3, =0x1d // 29
vmov.32 d0[1], r3
ldr r3, =0x37 // 55
vmov.32 d1[0], r3
tr4_luma_shift d28, d29, d30, d31, #7
vtrn.16 d28, d29
vtrn.16 d30, d31
vtrn.32 q14, q15
tr4_luma_shift d28, d29, d30, d31, #12
vtrn.16 d28, d29
vtrn.16 d30, d31
vtrn.32 q14, q15
vst1.16 {q14, q15}, [r0]
vpop {d8-d15}
bx lr
endfunc
.macro sum_sub out, in, c, op
.ifc \op, +
vmlal.s16 \out, \in, \c
.else
vmlsl.s16 \out, \in, \c
.endif
.endm
.macro tr_4x4 in0, in1, in2, in3, out0, out1, out2, out3, shift, tmp0, tmp1, tmp2, tmp3, tmp4
vshll.s16 \tmp0, \in0, #6
vmull.s16 \tmp2, \in1, d4[1]
vmov \tmp1, \tmp0
vmull.s16 \tmp3, \in1, d4[3]
vmlal.s16 \tmp0, \in2, d4[0] @e0
vmlsl.s16 \tmp1, \in2, d4[0] @e1
vmlal.s16 \tmp2, \in3, d4[3] @o0
vmlsl.s16 \tmp3, \in3, d4[1] @o1
vadd.s32 \tmp4, \tmp0, \tmp2
vsub.s32 \tmp0, \tmp0, \tmp2
vadd.s32 \tmp2, \tmp1, \tmp3
vsub.s32 \tmp1, \tmp1, \tmp3
vqrshrn.s32 \out0, \tmp4, #\shift
vqrshrn.s32 \out3, \tmp0, #\shift
vqrshrn.s32 \out1, \tmp2, #\shift
vqrshrn.s32 \out2, \tmp1, #\shift
.endm
.macro tr_4x4_8 in0, in1, in2, in3, out0, out1, out2, out3, tmp0, tmp1, tmp2, tmp3
vshll.s16 \tmp0, \in0, #6
vld1.s16 {\in0}, [r1, :64]!
vmov \tmp1, \tmp0
vmull.s16 \tmp2, \in1, \in0[1]
vmull.s16 \tmp3, \in1, \in0[3]
vmlal.s16 \tmp0, \in2, \in0[0] @e0
vmlsl.s16 \tmp1, \in2, \in0[0] @e1
vmlal.s16 \tmp2, \in3, \in0[3] @o0
vmlsl.s16 \tmp3, \in3, \in0[1] @o1
vld1.s16 {\in0}, [r1, :64]
vadd.s32 \out0, \tmp0, \tmp2
vadd.s32 \out1, \tmp1, \tmp3
vsub.s32 \out2, \tmp1, \tmp3
vsub.s32 \out3, \tmp0, \tmp2
sub r1, r1, #8
.endm
@ Do a 4x4 transpose, using q registers for the subtransposes that don't
@ need to address the indiviudal d registers.
@ r0,r1 == rq0, r2,r3 == rq1
.macro transpose_4x4 rq0, rq1, r0, r1, r2, r3
vtrn.32 \rq0, \rq1
vtrn.16 \r0, \r1
vtrn.16 \r2, \r3
.endm
.macro idct_4x4 bitdepth
function ff_hevc_idct_4x4_\bitdepth\()_neon, export=1
@r0 - coeffs
vld1.s16 {q0-q1}, [r0, :128]
movrel r1, trans
vld1.s16 {d4}, [r1, :64]
tr_4x4 d0, d1, d2, d3, d16, d17, d18, d19, 7, q10, q11, q12, q13, q0
transpose_4x4 q8, q9, d16, d17, d18, d19
tr_4x4 d16, d17, d18, d19, d0, d1, d2, d3, 20 - \bitdepth, q10, q11, q12, q13, q0
transpose_4x4 q0, q1, d0, d1, d2, d3
vst1.s16 {d0-d3}, [r0, :128]
bx lr
endfunc
.endm
.macro transpose8_4x4 r0, r1, r2, r3
vtrn.16 \r0, \r1
vtrn.16 \r2, \r3
vtrn.32 \r0, \r2
vtrn.32 \r1, \r3
.endm
.macro transpose_8x8 r0, r1, r2, r3, r4, r5, r6, r7, l0, l1, l2, l3, l4, l5, l6, l7
transpose8_4x4 \r0, \r1, \r2, \r3
transpose8_4x4 \r4, \r5, \r6, \r7
transpose8_4x4 \l0, \l1, \l2, \l3
transpose8_4x4 \l4, \l5, \l6, \l7
.endm
.macro tr_8x4 shift, in0, in1, in2, in3, in4, in5, in6, in7
tr_4x4_8 \in0, \in2, \in4, \in6, q8, q9, q10, q11, q12, q13, q14, q15
vmull.s16 q14, \in1, \in0[2]
vmull.s16 q12, \in1, \in0[0]
vmull.s16 q13, \in1, \in0[1]
sum_sub q14, \in3, \in0[0], -
sum_sub q12, \in3, \in0[1], +
sum_sub q13, \in3, \in0[3], -
sum_sub q14, \in5, \in0[3], +
sum_sub q12, \in5, \in0[2], +
sum_sub q13, \in5, \in0[0], -
sum_sub q14, \in7, \in0[1], +
sum_sub q12, \in7, \in0[3], +
sum_sub q13, \in7, \in0[2], -
vadd.s32 q15, q10, q14
vsub.s32 q10, q10, q14
vqrshrn.s32 \in2, q15, \shift
vmull.s16 q15, \in1, \in0[3]
sum_sub q15, \in3, \in0[2], -
sum_sub q15, \in5, \in0[1], +
sum_sub q15, \in7, \in0[0], -
vqrshrn.s32 \in5, q10, \shift
vadd.s32 q10, q8, q12
vsub.s32 q8, q8, q12
vadd.s32 q12, q9, q13
vsub.s32 q9, q9, q13
vadd.s32 q14, q11, q15
vsub.s32 q11, q11, q15
vqrshrn.s32 \in0, q10, \shift
vqrshrn.s32 \in7, q8, \shift
vqrshrn.s32 \in1, q12, \shift
vqrshrn.s32 \in6, q9, \shift
vqrshrn.s32 \in3, q14, \shift
vqrshrn.s32 \in4, q11, \shift
.endm
.macro idct_8x8 bitdepth
function ff_hevc_idct_8x8_\bitdepth\()_neon, export=1
@r0 - coeffs
vpush {q4-q7}
mov r1, r0
mov r2, #64
add r3, r0, #32
vld1.s16 {q0-q1}, [r1,:128], r2
vld1.s16 {q2-q3}, [r3,:128], r2
vld1.s16 {q4-q5}, [r1,:128], r2
vld1.s16 {q6-q7}, [r3,:128], r2
movrel r1, trans
tr_8x4 7, d0, d2, d4, d6, d8, d10, d12, d14
tr_8x4 7, d1, d3, d5, d7, d9, d11, d13, d15
@ Transpose each 4x4 block, and swap how d4-d7 and d8-d11 are used.
@ Layout before:
@ d0 d1
@ d2 d3
@ d4 d5
@ d6 d7
@ d8 d9
@ d10 d11
@ d12 d13
@ d14 d15
transpose_8x8 d0, d2, d4, d6, d8, d10, d12, d14, d1, d3, d5, d7, d9, d11, d13, d15
@ Now the layout is:
@ d0 d8
@ d2 d10
@ d4 d12
@ d6 d14
@ d1 d9
@ d3 d11
@ d5 d13
@ d7 d15
tr_8x4 20 - \bitdepth, d0, d2, d4, d6, d1, d3, d5, d7
vswp d0, d8
tr_8x4 20 - \bitdepth, d0, d10, d12, d14, d9, d11, d13, d15
vswp d0, d8
transpose_8x8 d0, d2, d4, d6, d8, d10, d12, d14, d1, d3, d5, d7, d9, d11, d13, d15
mov r1, r0
mov r2, #64
add r3, r0, #32
vst1.s16 {q0-q1}, [r1,:128], r2
vst1.s16 {q2-q3}, [r3,:128], r2
vst1.s16 {q4-q5}, [r1,:128], r2
vst1.s16 {q6-q7}, [r3,:128], r2
vpop {q4-q7}
bx lr
endfunc
.endm
.macro butterfly e, o, tmp_p, tmp_m
vadd.s32 \tmp_p, \e, \o
vsub.s32 \tmp_m, \e, \o
.endm
.macro tr16_8x4 in0, in1, in2, in3, in4, in5, in6, in7
tr_4x4_8 \in0, \in2, \in4, \in6, q8, q9, q10, q11, q12, q13, q14, q15
vmull.s16 q12, \in1, \in0[0]
vmull.s16 q13, \in1, \in0[1]
vmull.s16 q14, \in1, \in0[2]
vmull.s16 q15, \in1, \in0[3]
sum_sub q12, \in3, \in0[1], +
sum_sub q13, \in3, \in0[3], -
sum_sub q14, \in3, \in0[0], -
sum_sub q15, \in3, \in0[2], -
sum_sub q12, \in5, \in0[2], +
sum_sub q13, \in5, \in0[0], -
sum_sub q14, \in5, \in0[3], +
sum_sub q15, \in5, \in0[1], +
sum_sub q12, \in7, \in0[3], +
sum_sub q13, \in7, \in0[2], -
sum_sub q14, \in7, \in0[1], +
sum_sub q15, \in7, \in0[0], -
butterfly q8, q12, q0, q7
butterfly q9, q13, q1, q6
butterfly q10, q14, q2, q5
butterfly q11, q15, q3, q4
add r4, sp, #512
vst1.s16 {q0-q1}, [r4, :128]!
vst1.s16 {q2-q3}, [r4, :128]!
vst1.s16 {q4-q5}, [r4, :128]!
vst1.s16 {q6-q7}, [r4, :128]
.endm
.macro load16 in0, in1, in2, in3, in4, in5, in6, in7
vld1.s16 {\in0}, [r1, :64], r2
vld1.s16 {\in1}, [r3, :64], r2
vld1.s16 {\in2}, [r1, :64], r2
vld1.s16 {\in3}, [r3, :64], r2
vld1.s16 {\in4}, [r1, :64], r2
vld1.s16 {\in5}, [r3, :64], r2
vld1.s16 {\in6}, [r1, :64], r2
vld1.s16 {\in7}, [r3, :64], r2
.endm
.macro add_member in, t0, t1, t2, t3, t4, t5, t6, t7, op0, op1, op2, op3, op4, op5, op6, op7
sum_sub q5, \in, \t0, \op0
sum_sub q6, \in, \t1, \op1
sum_sub q7, \in, \t2, \op2
sum_sub q8, \in, \t3, \op3
sum_sub q9, \in, \t4, \op4
sum_sub q10, \in, \t5, \op5
sum_sub q11, \in, \t6, \op6
sum_sub q12, \in, \t7, \op7
.endm
.macro butterfly16 in0, in1, in2, in3, in4, in5, in6, in7
vadd.s32 q4, \in0, \in1
vsub.s32 \in0, \in0, \in1
vadd.s32 \in1, \in2, \in3
vsub.s32 \in2, \in2, \in3
vadd.s32 \in3, \in4, \in5
vsub.s32 \in4, \in4, \in5
vadd.s32 \in5, \in6, \in7
vsub.s32 \in6, \in6, \in7
.endm
.macro store16 in0, in1, in2, in3, in4, in5, in6, in7
vst1.s16 \in0, [r1, :64], r2
vst1.s16 \in1, [r3, :64], r4
vst1.s16 \in2, [r1, :64], r2
vst1.s16 \in3, [r3, :64], r4
vst1.s16 \in4, [r1, :64], r2
vst1.s16 \in5, [r3, :64], r4
vst1.s16 \in6, [r1, :64], r2
vst1.s16 \in7, [r3, :64], r4
.endm
.macro scale out0, out1, out2, out3, out4, out5, out6, out7, in0, in1, in2, in3, in4, in5, in6, in7, shift
vqrshrn.s32 \out0, \in0, \shift
vqrshrn.s32 \out1, \in1, \shift
vqrshrn.s32 \out2, \in2, \shift
vqrshrn.s32 \out3, \in3, \shift
vqrshrn.s32 \out4, \in4, \shift
vqrshrn.s32 \out5, \in5, \shift
vqrshrn.s32 \out6, \in6, \shift
vqrshrn.s32 \out7, \in7, \shift
.endm
.macro tr_16x4 name, shift
function func_tr_16x4_\name
mov r1, r5
add r3, r5, #64
mov r2, #128
load16 d0, d1, d2, d3, d4, d5, d6, d7
movrel r1, trans
tr16_8x4 d0, d1, d2, d3, d4, d5, d6, d7
add r1, r5, #32
add r3, r5, #(64 + 32)
mov r2, #128
load16 d8, d9, d2, d3, d4, d5, d6, d7
movrel r1, trans + 16
vld1.s16 {q0}, [r1, :128]
vmull.s16 q5, d8, d0[0]
vmull.s16 q6, d8, d0[1]
vmull.s16 q7, d8, d0[2]
vmull.s16 q8, d8, d0[3]
vmull.s16 q9, d8, d1[0]
vmull.s16 q10, d8, d1[1]
vmull.s16 q11, d8, d1[2]
vmull.s16 q12, d8, d1[3]
add_member d9, d0[1], d1[0], d1[3], d1[1], d0[2], d0[0], d0[3], d1[2], +, +, +, -, -, -, -, -
add_member d2, d0[2], d1[3], d0[3], d0[1], d1[2], d1[0], d0[0], d1[1], +, +, -, -, -, +, +, +
add_member d3, d0[3], d1[1], d0[1], d1[3], d0[0], d1[2], d0[2], d1[0], +, -, -, +, +, +, -, -
add_member d4, d1[0], d0[2], d1[2], d0[0], d1[3], d0[1], d1[1], d0[3], +, -, -, +, -, -, +, +
add_member d5, d1[1], d0[0], d1[0], d1[2], d0[1], d0[3], d1[3], d0[2], +, -, +, +, -, +, +, -
add_member d6, d1[2], d0[3], d0[0], d0[2], d1[1], d1[3], d1[0], d0[1], +, -, +, -, +, +, -, +
add_member d7, d1[3], d1[2], d1[1], d1[0], d0[3], d0[2], d0[1], d0[0], +, -, +, -, +, -, +, -
add r4, sp, #512
vld1.s16 {q0-q1}, [r4, :128]!
vld1.s16 {q2-q3}, [r4, :128]!
butterfly16 q0, q5, q1, q6, q2, q7, q3, q8
scale d26, d27, d28, d29, d30, d31, d16, d17, q4, q0, q5, q1, q6, q2, q7, q3, \shift
transpose8_4x4 d26, d28, d30, d16
transpose8_4x4 d17, d31, d29, d27
mov r1, r6
add r3, r6, #(24 +3*32)
mov r2, #32
mov r4, #-32
store16 d26, d27, d28, d29, d30, d31, d16, d17
add r4, sp, #576
vld1.s16 {q0-q1}, [r4, :128]!
vld1.s16 {q2-q3}, [r4, :128]
butterfly16 q0, q9, q1, q10, q2, q11, q3, q12
scale d26, d27, d28, d29, d30, d31, d8, d9, q4, q0, q9, q1, q10, q2, q11, q3, \shift
transpose8_4x4 d26, d28, d30, d8
transpose8_4x4 d9, d31, d29, d27
add r1, r6, #8
add r3, r6, #(16 + 3 * 32)
mov r2, #32
mov r4, #-32
store16 d26, d27, d28, d29, d30, d31, d8, d9
bx lr
endfunc
.endm
.macro idct_16x16 bitdepth
function ff_hevc_idct_16x16_\bitdepth\()_neon, export=1
@r0 - coeffs
push {r4-r7, lr}
vpush {q4-q7}
@ Align the stack, allocate a temp buffer
T mov r7, sp
T and r7, r7, #15
A and r7, sp, #15
add r7, r7, #640
sub sp, sp, r7
.irp i, 0, 1, 2, 3
add r5, r0, #(8 * \i)
add r6, sp, #(8 * \i * 16)
bl func_tr_16x4_firstpass
.endr
.irp i, 0, 1, 2, 3
add r5, sp, #(8 * \i)
add r6, r0, #(8 * \i * 16)
bl func_tr_16x4_secondpass_\bitdepth
.endr
add sp, sp, r7
vpop {q4-q7}
pop {r4-r7, pc}
endfunc
.endm
tr_16x4 firstpass, 7
tr_16x4 secondpass_8, 20 - 8
tr_16x4 secondpass_10, 20 - 10
.ltorg
idct_4x4 8
idct_4x4 10
idct_8x8 8
idct_8x8 10
idct_16x16 8
idct_16x16 10