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Diffstat (limited to 'libavcodec/arm/vp9itxfm_neon.S')
-rw-r--r-- | libavcodec/arm/vp9itxfm_neon.S | 1202 |
1 files changed, 1202 insertions, 0 deletions
diff --git a/libavcodec/arm/vp9itxfm_neon.S b/libavcodec/arm/vp9itxfm_neon.S new file mode 100644 index 0000000000..25f6ddeb0e --- /dev/null +++ b/libavcodec/arm/vp9itxfm_neon.S @@ -0,0 +1,1202 @@ +/* + * Copyright (c) 2016 Google Inc. + * + * 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" +#include "neon.S" + +const itxfm4_coeffs, align=4 + .short 11585, 6270, 15137, 0 +iadst4_coeffs: + .short 5283, 15212, 9929, 13377 +endconst + +const iadst8_coeffs, align=4 + .short 16305, 1606, 14449, 7723, 10394, 12665, 4756, 15679 +idct_coeffs: + .short 11585, 6270, 15137, 3196, 16069, 13623, 9102, 1606 + .short 16305, 12665, 10394, 7723, 14449, 15679, 4756, 0 + .short 804, 16364, 12140, 11003, 7005, 14811, 15426, 5520 + .short 3981, 15893, 14053, 8423, 9760, 13160, 16207, 2404 +endconst + +const iadst16_coeffs, align=4 + .short 16364, 804, 15893, 3981, 14811, 7005, 13160, 9760 + .short 11003, 12140, 8423, 14053, 5520, 15426, 2404, 16207 +endconst + +@ Do four 4x4 transposes, using q registers for the subtransposes that don't +@ need to address the individual d registers. +@ r0,r1 == rq1, r2,r3 == rq1, etc +.macro transpose16_q_4x_4x4 rq0, rq1, rq2, rq3, rq4, rq5, rq6, rq7, r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15 + vtrn.32 \rq0, \rq1 + vtrn.32 \rq2, \rq3 + vtrn.32 \rq4, \rq5 + vtrn.32 \rq6, \rq7 + vtrn.16 \r0, \r1 + vtrn.16 \r2, \r3 + vtrn.16 \r4, \r5 + vtrn.16 \r6, \r7 + vtrn.16 \r8, \r9 + vtrn.16 \r10, \r11 + vtrn.16 \r12, \r13 + vtrn.16 \r14, \r15 +.endm + +@ out1 = ((in1 + in2) * d0[0] + (1 << 13)) >> 14 +@ out2 = ((in1 - in2) * d0[0] + (1 << 13)) >> 14 +@ in/out are d registers +.macro mbutterfly0 out1, out2, in1, in2, tmpd1, tmpd2, tmpq3, tmpq4, neg=0 + vadd.s16 \tmpd1, \in1, \in2 + vsub.s16 \tmpd2, \in1, \in2 + vmull.s16 \tmpq3, \tmpd1, d0[0] + vmull.s16 \tmpq4, \tmpd2, d0[0] +.if \neg > 0 + vneg.s32 \tmpq3, \tmpq3 +.endif + vrshrn.s32 \out1, \tmpq3, #14 + vrshrn.s32 \out2, \tmpq4, #14 +.endm + +@ out1,out2 = ((in1 + in2) * d0[0] + (1 << 13)) >> 14 +@ out3,out4 = ((in1 - in2) * d0[0] + (1 << 13)) >> 14 +@ Same as mbutterfly0, but with input being 2 q registers, output +@ being 4 d registers. +@ This can do with either 4 or 6 temporary q registers. +.macro dmbutterfly0 out1, out2, out3, out4, in1, in2, tmpq1, tmpq2, tmpd11, tmpd12, tmpd21, tmpd22, tmpq3, tmpq4, tmpq5, tmpq6 + vadd.s16 \tmpq1, \in1, \in2 + vsub.s16 \tmpq2, \in1, \in2 + vmull.s16 \tmpq3, \tmpd11, d0[0] + vmull.s16 \tmpq4, \tmpd12, d0[0] +.ifb \tmpq5 + vrshrn.s32 \out1, \tmpq3, #14 + vrshrn.s32 \out2, \tmpq4, #14 + vmull.s16 \tmpq3, \tmpd21, d0[0] + vmull.s16 \tmpq4, \tmpd22, d0[0] + vrshrn.s32 \out3, \tmpq3, #14 + vrshrn.s32 \out4, \tmpq4, #14 +.else + vmull.s16 \tmpq5, \tmpd21, d0[0] + vmull.s16 \tmpq6, \tmpd22, d0[0] + vrshrn.s32 \out1, \tmpq3, #14 + vrshrn.s32 \out2, \tmpq4, #14 + vrshrn.s32 \out3, \tmpq5, #14 + vrshrn.s32 \out4, \tmpq6, #14 +.endif +.endm + +@ out1 = in1 * coef1 - in2 * coef2 +@ out2 = in1 * coef2 + in2 * coef1 +@ out are 2 q registers, in are 2 d registers +.macro mbutterfly_l out1, out2, in1, in2, coef1, coef2 + vmull.s16 \out1, \in1, \coef1 + vmlsl.s16 \out1, \in2, \coef2 + vmull.s16 \out2, \in1, \coef2 + vmlal.s16 \out2, \in2, \coef1 +.endm + +@ out1,out2 = in1,in2 * coef1 - in3,in4 * coef2 +@ out3,out4 = in1,in2 * coef2 + in3,in4 * coef1 +@ out are 4 q registers, in are 4 d registers +.macro dmbutterfly_l out1, out2, out3, out4, in1, in2, in3, in4, coef1, coef2 + vmull.s16 \out1, \in1, \coef1 + vmull.s16 \out2, \in2, \coef1 + vmull.s16 \out3, \in1, \coef2 + vmull.s16 \out4, \in2, \coef2 + vmlsl.s16 \out1, \in3, \coef2 + vmlsl.s16 \out2, \in4, \coef2 + vmlal.s16 \out3, \in3, \coef1 + vmlal.s16 \out4, \in4, \coef1 +.endm + +@ inout1 = (inout1 * coef1 - inout2 * coef2 + (1 << 13)) >> 14 +@ inout2 = (inout1 * coef2 + inout2 * coef1 + (1 << 13)) >> 14 +@ inout are 2 d registers, tmp are 2 q registers +.macro mbutterfly inout1, inout2, coef1, coef2, tmp1, tmp2, neg=0 + mbutterfly_l \tmp1, \tmp2, \inout1, \inout2, \coef1, \coef2 +.if \neg > 0 + vneg.s32 \tmp2, \tmp2 +.endif + vrshrn.s32 \inout1, \tmp1, #14 + vrshrn.s32 \inout2, \tmp2, #14 +.endm + +@ inout1,inout2 = (inout1,inout2 * coef1 - inout3,inout4 * coef2 + (1 << 13)) >> 14 +@ inout3,inout4 = (inout1,inout2 * coef2 + inout3,inout4 * coef1 + (1 << 13)) >> 14 +@ inout are 4 d registers, tmp are 4 q registers +.macro dmbutterfly inout1, inout2, inout3, inout4, coef1, coef2, tmp1, tmp2, tmp3, tmp4 + dmbutterfly_l \tmp1, \tmp2, \tmp3, \tmp4, \inout1, \inout2, \inout3, \inout4, \coef1, \coef2 + vrshrn.s32 \inout1, \tmp1, #14 + vrshrn.s32 \inout2, \tmp2, #14 + vrshrn.s32 \inout3, \tmp3, #14 + vrshrn.s32 \inout4, \tmp4, #14 +.endm + +@ out1 = in1 + in2 +@ out2 = in1 - in2 +.macro butterfly out1, out2, in1, in2 + vadd.s16 \out1, \in1, \in2 + vsub.s16 \out2, \in1, \in2 +.endm + +@ out1 = in1 - in2 +@ out2 = in1 + in2 +.macro butterfly_r out1, out2, in1, in2 + vsub.s16 \out1, \in1, \in2 + vadd.s16 \out2, \in1, \in2 +.endm + +@ out1 = (in1 + in2 + (1 << 13)) >> 14 +@ out2 = (in1 - in2 + (1 << 13)) >> 14 +@ out are 2 d registers, in are 2 q registers, tmp are 2 q registers +.macro butterfly_n out1, out2, in1, in2, tmp1, tmp2 + vadd.s32 \tmp1, \in1, \in2 + vsub.s32 \tmp2, \in1, \in2 + vrshrn.s32 \out1, \tmp1, #14 + vrshrn.s32 \out2, \tmp2, #14 +.endm + +@ out1,out2 = (in1,in2 + in3,in4 + (1 << 13)) >> 14 +@ out3,out4 = (in1,in2 - in3,in4 + (1 << 13)) >> 14 +@ out are 4 d registers, in are 4 q registers, tmp are 4 q registers +.macro dbutterfly_n out1, out2, out3, out4, in1, in2, in3, in4, tmp1, tmp2, tmp3, tmp4 + vadd.s32 \tmp1, \in1, \in3 + vadd.s32 \tmp2, \in2, \in4 + vsub.s32 \tmp3, \in1, \in3 + vsub.s32 \tmp4, \in2, \in4 + vrshrn.s32 \out1, \tmp1, #14 + vrshrn.s32 \out2, \tmp2, #14 + vrshrn.s32 \out3, \tmp3, #14 + vrshrn.s32 \out4, \tmp4, #14 +.endm + + +.macro iwht4 c0, c1, c2, c3 + vadd.i16 \c0, \c0, \c1 + vsub.i16 d17, \c2, \c3 + vsub.i16 d16, \c0, d17 + vshr.s16 d16, d16, #1 + vsub.i16 \c2, d16, \c1 + vsub.i16 \c1, d16, \c3 + vadd.i16 \c3, d17, \c2 + vsub.i16 \c0, \c0, \c1 +.endm + +.macro idct4 c0, c1, c2, c3 + vmull.s16 q13, \c1, d0[2] + vmull.s16 q11, \c1, d0[1] + vadd.i16 d16, \c0, \c2 + vsub.i16 d17, \c0, \c2 + vmlal.s16 q13, \c3, d0[1] + vmull.s16 q9, d16, d0[0] + vmull.s16 q10, d17, d0[0] + vmlsl.s16 q11, \c3, d0[2] + vrshrn.s32 d26, q13, #14 + vrshrn.s32 d18, q9, #14 + vrshrn.s32 d20, q10, #14 + vrshrn.s32 d22, q11, #14 + vadd.i16 \c0, d18, d26 + vsub.i16 \c3, d18, d26 + vadd.i16 \c1, d20, d22 + vsub.i16 \c2, d20, d22 +.endm + +.macro iadst4 c0, c1, c2, c3 + vmull.s16 q10, \c0, d1[0] + vmlal.s16 q10, \c2, d1[1] + vmlal.s16 q10, \c3, d1[2] + vmull.s16 q11, \c0, d1[2] + vmlsl.s16 q11, \c2, d1[0] + vsub.s16 \c0, \c0, \c2 + vmlsl.s16 q11, \c3, d1[1] + vadd.s16 \c0, \c0, \c3 + vmull.s16 q13, \c1, d1[3] + vmull.s16 q12, \c0, d1[3] + vadd.s32 q14, q10, q13 + vadd.s32 q1, q11, q13 + vrshrn.s32 \c0, q14, #14 + vadd.s32 q10, q10, q11 + vrshrn.s32 \c1, q1, #14 + vsub.s32 q10, q10, q13 + vrshrn.s32 \c2, q12, #14 + vrshrn.s32 \c3, q10, #14 +.endm + +@ The public functions in this file have got the following signature: +@ void itxfm_add(uint8_t *dst, ptrdiff_t stride, int16_t *block, int eob); + +.macro itxfm_func4x4 txfm1, txfm2 +function ff_vp9_\txfm1\()_\txfm2\()_4x4_add_neon, export=1 +.ifc \txfm1,\txfm2 +.ifc \txfm1,idct + movrel r12, itxfm4_coeffs + vld1.16 {d0}, [r12,:64] +.endif +.ifc \txfm1,iadst + movrel r12, iadst4_coeffs + vld1.16 {d1}, [r12,:64] +.endif +.else + movrel r12, itxfm4_coeffs + vld1.16 {q0}, [r12,:128] +.endif + + vmov.i16 q15, #0 +.ifc \txfm1\()_\txfm2,idct_idct + cmp r3, #1 + bne 1f + @ DC-only for idct/idct + vld1.16 {d4[]}, [r2,:16] + vmull.s16 q2, d4, d0[0] + vrshrn.s32 d4, q2, #14 + vmull.s16 q2, d4, d0[0] + vrshrn.s32 d4, q2, #14 + vst1.16 {d30[0]}, [r2,:16] + vdup.16 q2, d4[0] + vmov q3, q2 + b 2f +.endif + +1: + vld1.16 {d4-d7}, [r2,:128] + vst1.16 {q15}, [r2,:128]! + +.ifc \txfm1,iwht + vshr.s16 q2, q2, #2 + vshr.s16 q3, q3, #2 +.endif + + \txfm1\()4 d4, d5, d6, d7 + + vst1.16 {q15}, [r2,:128]! + @ Transpose 4x4 with 16 bit elements + vtrn.16 d4, d5 + vtrn.16 d6, d7 + vtrn.32 q2, q3 + + \txfm2\()4 d4, d5, d6, d7 +2: + vld1.32 {d0[]}, [r0,:32], r1 + vld1.32 {d0[1]}, [r0,:32], r1 +.ifnc \txfm1,iwht + vrshr.s16 q2, q2, #4 + vrshr.s16 q3, q3, #4 +.endif + vaddw.u8 q2, q2, d0 + vld1.32 {d1[]}, [r0,:32], r1 + vld1.32 {d1[1]}, [r0,:32], r1 + vqmovun.s16 d0, q2 + sub r0, r0, r1, lsl #2 + + vaddw.u8 q3, q3, d1 + vst1.32 {d0[0]}, [r0,:32], r1 + vqmovun.s16 d1, q3 + + vst1.32 {d0[1]}, [r0,:32], r1 + vst1.32 {d1[0]}, [r0,:32], r1 + vst1.32 {d1[1]}, [r0,:32], r1 + + bx lr +endfunc +.endm + +itxfm_func4x4 idct, idct +itxfm_func4x4 iadst, idct +itxfm_func4x4 idct, iadst +itxfm_func4x4 iadst, iadst +itxfm_func4x4 iwht, iwht + + +.macro idct8 + dmbutterfly0 d16, d17, d24, d25, q8, q12, q2, q4, d4, d5, d8, d9, q3, q2, q5, q4 @ q8 = t0a, q12 = t1a + dmbutterfly d20, d21, d28, d29, d0[1], d0[2], q2, q3, q4, q5 @ q10 = t2a, q14 = t3a + dmbutterfly d18, d19, d30, d31, d0[3], d1[0], q2, q3, q4, q5 @ q9 = t4a, q15 = t7a + dmbutterfly d26, d27, d22, d23, d1[1], d1[2], q2, q3, q4, q5 @ q13 = t5a, q11 = t6a + + butterfly q2, q14, q8, q14 @ q2 = t0, q14 = t3 + butterfly q3, q10, q12, q10 @ q3 = t1, q10 = t2 + butterfly q4, q13, q9, q13 @ q4 = t4, q13 = t5a + butterfly q5, q11, q15, q11 @ q5 = t7, q11 = t6a + + butterfly q8, q15, q2, q5 @ q8 = out[0], q15 = out[7] + + dmbutterfly0 d4, d5, d10, d11, q11, q13, q9, q13, d18, d19, d26, d27, q2, q5, q11, q12 @ q2 = t6, q5 = t5 + + butterfly q11, q12, q14, q4 @ q11 = out[3], q12 = out[4] + butterfly q9, q14, q3, q2 @ q9 = out[1], q14 = out[6] + butterfly_r q13, q10, q10, q5 @ q13 = out[5], q10 = out[2] +.endm + +.macro iadst8 + dmbutterfly_l q4, q5, q2, q3, d30, d31, d16, d17, d2[1], d2[0] @ q4,q5 = t1a, q2,q3 = t0a + dmbutterfly_l q8, q15, q6, q7, d22, d23, d24, d25, d3[1], d3[0] @ q8,q15 = t5a, q6,q7 = t4a + + dbutterfly_n d22, d23, d4, d5, q2, q3, q6, q7, q11, q12, q2, q3 @ q11 = t0, q2 = t4 + + dbutterfly_n d24, d25, d6, d7, q4, q5, q8, q15, q12, q3, q6, q7 @ q12 = t1, q3 = t5 + + dmbutterfly_l q6, q7, q4, q5, d26, d27, d20, d21, d2[3], d2[2] @ q6,q7 = t3a, q4,q5 = t2a + dmbutterfly_l q10, q13, q8, q15, d18, d19, d28, d29, d3[3], d3[2] @ q10,q13 = t7a, q8,q15 = t6a + + dbutterfly_n d18, d19, d8, d9, q4, q5, q8, q15, q9, q14, q4, q5 @ q9 = t2, q4 = t6 + dbutterfly_n d16, d17, d12, d13, q6, q7, q10, q13, q8, q15, q6, q7 @ q8 = t3, q6 = t7 + + butterfly q15, q12, q12, q8 @ q15 = -out[7], q12 = t3 + vneg.s16 q15, q15 @ q15 = out[7] + butterfly q8, q9, q11, q9 @ q8 = out[0], q9 = t2 + + dmbutterfly_l q10, q11, q5, q7, d4, d5, d6, d7, d0[1], d0[2] @ q10,q11 = t5a, q5,q7 = t4a + dmbutterfly_l q2, q3, q13, q14, d12, d13, d8, d9, d0[2], d0[1] @ q2,q3 = t6a, q13,q14 = t7a + + dbutterfly_n d28, d29, d8, d9, q10, q11, q13, q14, q4, q6, q10, q11 @ q14 = out[6], q4 = t7 + + dmbutterfly0 d22, d23, d24, d25, q9, q12, q6, q13, d12, d13, d26, d27, q9, q10 @ q11 = -out[3], q12 = out[4] + vneg.s16 q11, q11 @ q11 = out[3] + + dbutterfly_n d18, d19, d4, d5, q5, q7, q2, q3, q9, q10, q2, q3 @ q9 = -out[1], q2 = t6 + vneg.s16 q9, q9 @ q9 = out[1] + + dmbutterfly0 d20, d21, d26, d27, q2, q4, q3, q5, d6, d7, d10, d11, q6, q7 @ q10 = out[2], q13 = -out[5] + vneg.s16 q13, q13 @ q13 = out[5] +.endm + + +.macro itxfm_func8x8 txfm1, txfm2 +function ff_vp9_\txfm1\()_\txfm2\()_8x8_add_neon, export=1 + @ Push q4-q7 if iadst is used, idct requires + @ a few scratch registers less, so only push q4-q5 + @ if only idct is involved. + @ The iadst also uses a few coefficients from + @ idct, so those always need to be loaded. +.ifc \txfm1\()_\txfm2,idct_idct + movrel r12, idct_coeffs + vpush {q4-q5} + vld1.16 {q0}, [r12,:128] +.else + movrel r12, iadst8_coeffs + vld1.16 {q1}, [r12,:128]! + vpush {q4-q7} + vld1.16 {q0}, [r12,:128] +.endif + + vmov.i16 q2, #0 + vmov.i16 q3, #0 + +.ifc \txfm1\()_\txfm2,idct_idct + cmp r3, #1 + bne 1f + @ DC-only for idct/idct + vld1.16 {d16[]}, [r2,:16] + vmull.s16 q8, d16, d0[0] + vrshrn.s32 d16, q8, #14 + vmull.s16 q8, d16, d0[0] + vrshrn.s32 d16, q8, #14 + vdup.16 q8, d16[0] + vmov q9, q8 + vmov q10, q8 + vmov q11, q8 + vmov q12, q8 + vmov q13, q8 + vmov q14, q8 + vmov q15, q8 + vst1.16 {d4[0]}, [r2,:16] + b 2f +.endif +1: + vld1.16 {q8-q9}, [r2,:128]! + vld1.16 {q10-q11}, [r2,:128]! + vld1.16 {q12-q13}, [r2,:128]! + vld1.16 {q14-q15}, [r2,:128]! + sub r2, r2, #128 + vst1.16 {q2-q3}, [r2,:128]! + vst1.16 {q2-q3}, [r2,:128]! + vst1.16 {q2-q3}, [r2,:128]! + vst1.16 {q2-q3}, [r2,:128]! + + \txfm1\()8 + + @ Transpose 8x8 with 16 bit elements + vswp d17, d24 + vswp d19, d26 + vswp d21, d28 + vswp d23, d30 + transpose16_4x4 q8, q9, q10, q11, q12, q13, q14, q15 + + \txfm2\()8 +2: + mov r3, r0 + @ Add into the destination + vld1.8 {d4}, [r0,:64], r1 + vrshr.s16 q8, q8, #5 + vld1.8 {d5}, [r0,:64], r1 + vrshr.s16 q9, q9, #5 + vld1.8 {d6}, [r0,:64], r1 + vrshr.s16 q10, q10, #5 + vaddw.u8 q8, q8, d4 + vld1.8 {d7}, [r0,:64], r1 + vrshr.s16 q11, q11, #5 + vaddw.u8 q9, q9, d5 + vld1.8 {d8}, [r0,:64], r1 + vrshr.s16 q12, q12, #5 + vaddw.u8 q10, q10, d6 + vqmovun.s16 d4, q8 + vld1.8 {d9}, [r0,:64], r1 + vrshr.s16 q13, q13, #5 + vaddw.u8 q11, q11, d7 + vqmovun.s16 d5, q9 + vld1.8 {d10}, [r0,:64], r1 + vrshr.s16 q14, q14, #5 + vaddw.u8 q12, q12, d8 + vqmovun.s16 d6, q10 + vld1.8 {d11}, [r0,:64], r1 + vrshr.s16 q15, q15, #5 + vaddw.u8 q13, q13, d9 + vqmovun.s16 d7, q11 + + + vst1.8 {d4}, [r3,:64], r1 + vaddw.u8 q14, q14, d10 + vst1.8 {d5}, [r3,:64], r1 + vqmovun.s16 d8, q12 + vst1.8 {d6}, [r3,:64], r1 + vaddw.u8 q15, q15, d11 + vst1.8 {d7}, [r3,:64], r1 + vqmovun.s16 d9, q13 + vst1.8 {d8}, [r3,:64], r1 + vqmovun.s16 d10, q14 + vst1.8 {d9}, [r3,:64], r1 + vqmovun.s16 d11, q15 + + vst1.8 {d10}, [r3,:64], r1 + vst1.8 {d11}, [r3,:64], r1 + +.ifc \txfm1\()_\txfm2,idct_idct + vpop {q4-q5} +.else + vpop {q4-q7} +.endif + bx lr +endfunc +.endm + +itxfm_func8x8 idct, idct +itxfm_func8x8 iadst, idct +.ltorg +itxfm_func8x8 idct, iadst +itxfm_func8x8 iadst, iadst + + +function idct16x16_dc_add_neon + movrel r12, idct_coeffs + vld1.16 {d0}, [r12,:64] + + vmov.i16 q2, #0 + + vld1.16 {d16[]}, [r2,:16] + vmull.s16 q8, d16, d0[0] + vrshrn.s32 d16, q8, #14 + vmull.s16 q8, d16, d0[0] + vrshrn.s32 d16, q8, #14 + vdup.16 q8, d16[0] + vst1.16 {d4[0]}, [r2,:16] + + vrshr.s16 q8, q8, #6 + + mov r12, #16 +1: + @ Loop to add the constant from q8 into all 16x16 outputs + vld1.8 {q3}, [r0,:128] + vaddw.u8 q10, q8, d6 + vaddw.u8 q11, q8, d7 + vqmovun.s16 d6, q10 + vqmovun.s16 d7, q11 + vst1.8 {q3}, [r0,:128], r1 + subs r12, r12, #1 + bne 1b + + bx lr +endfunc +.ltorg + +.macro idct16 + mbutterfly0 d16, d24, d16, d24, d4, d6, q2, q3 @ d16 = t0a, d24 = t1a + mbutterfly d20, d28, d0[1], d0[2], q2, q3 @ d20 = t2a, d28 = t3a + mbutterfly d18, d30, d0[3], d1[0], q2, q3 @ d18 = t4a, d30 = t7a + mbutterfly d26, d22, d1[1], d1[2], q2, q3 @ d26 = t5a, d22 = t6a + mbutterfly d17, d31, d1[3], d2[0], q2, q3 @ d17 = t8a, d31 = t15a + mbutterfly d25, d23, d2[1], d2[2], q2, q3 @ d25 = t9a, d23 = t14a + mbutterfly d21, d27, d2[3], d3[0], q2, q3 @ d21 = t10a, d27 = t13a + mbutterfly d29, d19, d3[1], d3[2], q2, q3 @ d29 = t11a, d19 = t12a + + butterfly d4, d28, d16, d28 @ d4 = t0, d28 = t3 + butterfly d5, d20, d24, d20 @ d5 = t1, d20 = t2 + butterfly d6, d26, d18, d26 @ d6 = t4, d26 = t5 + butterfly d7, d22, d30, d22 @ d7 = t7, d22 = t6 + butterfly d16, d25, d17, d25 @ d16 = t8, d25 = t9 + butterfly d24, d21, d29, d21 @ d24 = t11, d21 = t10 + butterfly d17, d27, d19, d27 @ d17 = t12, d27 = t13 + butterfly d29, d23, d31, d23 @ d29 = t15, d23 = t14 + + mbutterfly0 d22, d26, d22, d26, d18, d30, q9, q15 @ d22 = t6a, d26 = t5a + mbutterfly d23, d25, d0[1], d0[2], q9, q15 @ d23 = t9a, d25 = t14a + mbutterfly d27, d21, d0[1], d0[2], q9, q15, neg=1 @ d27 = t13a, d21 = t10a + + butterfly d18, d7, d4, d7 @ d18 = t0a, d7 = t7a + butterfly d19, d22, d5, d22 @ d19 = t1a, d22 = t6 + butterfly d4, d26, d20, d26 @ d4 = t2a, d26 = t5 + butterfly d5, d6, d28, d6 @ d5 = t3a, d6 = t4 + butterfly d20, d28, d16, d24 @ d20 = t8a, d28 = t11a + butterfly d24, d21, d23, d21 @ d24 = t9, d21 = t10 + butterfly d23, d27, d25, d27 @ d23 = t14, d27 = t13 + butterfly d25, d29, d29, d17 @ d25 = t15a, d29 = t12a + + mbutterfly0 d27, d21, d27, d21, d16, d30, q8, q15 @ d27 = t13a, d21 = t10a + mbutterfly0 d29, d28, d29, d28, d16, d30, q8, q15 @ d29 = t12, d28 = t11 + + vswp d27, d29 @ d27 = t12, d29 = t13a + vswp d28, d27 @ d28 = t12, d27 = t11 + butterfly d16, d31, d18, d25 @ d16 = out[0], d31 = out[15] + butterfly d17, d30, d19, d23 @ d17 = out[1], d30 = out[14] + butterfly_r d25, d22, d22, d24 @ d25 = out[9], d22 = out[6] + butterfly d23, d24, d7, d20 @ d23 = out[7], d24 = out[8] + butterfly d18, d29, d4, d29 @ d18 = out[2], d29 = out[13] + butterfly d19, d28, d5, d28 @ d19 = out[3], d28 = out[12] + vmov d4, d21 @ d4 = t10a + butterfly d20, d27, d6, d27 @ d20 = out[4], d27 = out[11] + butterfly d21, d26, d26, d4 @ d21 = out[5], d26 = out[10] +.endm + +.macro iadst16 + movrel r12, iadst16_coeffs + vld1.16 {q0-q1}, [r12,:128] + + mbutterfly_l q3, q2, d31, d16, d0[1], d0[0] @ q3 = t1, q2 = t0 + mbutterfly_l q5, q4, d23, d24, d2[1], d2[0] @ q5 = t9, q4 = t8 + butterfly_n d31, d24, q3, q5, q6, q5 @ d31 = t1a, d24 = t9a + mbutterfly_l q7, q6, d29, d18, d0[3], d0[2] @ q7 = t3, q6 = t2 + butterfly_n d16, d23, q2, q4, q3, q4 @ d16 = t0a, d23 = t8a + + mbutterfly_l q3, q2, d21, d26, d2[3], d2[2] @ q3 = t11, q2 = t10 + butterfly_n d29, d26, q7, q3, q4, q3 @ d29 = t3a, d26 = t11a + mbutterfly_l q5, q4, d27, d20, d1[1], d1[0] @ q5 = t5, q4 = t4 + butterfly_n d18, d21, q6, q2, q3, q2 @ d18 = t2a, d21 = t10a + + mbutterfly_l q7, q6, d19, d28, d3[1], d3[0] @ q7 = t13, q6 = t12 + butterfly_n d20, d28, q5, q7, q2, q7 @ d20 = t5a, d28 = t13a + mbutterfly_l q3, q2, d25, d22, d1[3], d1[2] @ q3 = t7, q2 = t6 + butterfly_n d27, d19, q4, q6, q5, q6 @ d27 = t4a, d19 = t12a + + mbutterfly_l q5, q4, d17, d30, d3[3], d3[2] @ q5 = t15, q4 = t14 + movrel r12, idct_coeffs + vld1.16 {q0}, [r12,:128] + butterfly_n d22, d30, q3, q5, q6, q5 @ d22 = t7a, d30 = t15a + mbutterfly_l q7, q6, d23, d24, d0[3], d1[0] @ q7 = t9, q6 = t8 + butterfly_n d25, d17, q2, q4, q3, q4 @ d25 = t6a, d17 = t14a + + mbutterfly_l q2, q3, d28, d19, d1[0], d0[3] @ q2 = t12, q3 = t13 + butterfly_n d23, d19, q6, q2, q4, q2 @ d23 = t8a, d19 = t12a + mbutterfly_l q5, q4, d21, d26, d1[1], d1[2] @ q5 = t11, q4 = t10 + butterfly_r d4, d27, d16, d27 @ d4 = t4, d27 = t0 + butterfly_n d24, d28, q7, q3, q6, q3 @ d24 = t9a, d28 = t13a + + mbutterfly_l q6, q7, d30, d17, d1[2], d1[1] @ q6 = t14, q7 = t15 + butterfly_r d5, d20, d31, d20 @ d5 = t5, d20 = t1 + butterfly_n d21, d17, q4, q6, q3, q6 @ d21 = t10a, d17 = t14a + butterfly_n d26, d30, q5, q7, q4, q7 @ d26 = t11a, d30 = t15a + + butterfly_r d6, d25, d18, d25 @ d6 = t6, d25 = t2 + butterfly_r d7, d22, d29, d22 @ d7 = t7, d22 = t3 + + mbutterfly_l q5, q4, d19, d28, d0[1], d0[2] @ q5 = t13, q4 = t12 + mbutterfly_l q6, q7, d30, d17, d0[2], d0[1] @ q6 = t14, q7 = t15 + + butterfly_n d18, d30, q4, q6, q8, q6 @ d18 = out[2], d30 = t14a + butterfly_n d29, d17, q5, q7, q6, q7 @ d29 = -out[13], d17 = t15a + vneg.s16 d29, d29 @ d29 = out[13] + + mbutterfly_l q5, q4, d4, d5, d0[1], d0[2] @ q5 = t5a, q4 = t4a + mbutterfly_l q6, q7, d7, d6, d0[2], d0[1] @ q6 = t6a, q7 = t7a + + butterfly d2, d6, d27, d25 @ d2 = out[0], d6 = t2a + butterfly d3, d7, d23, d21 @ d3 =-out[1], d7 = t10 + + butterfly_n d19, d31, q4, q6, q2, q4 @ d19 = -out[3], d31 = t6 + vneg.s16 d19, d19 @ d19 = out[3] + butterfly_n d28, d16, q5, q7, q2, q5 @ d28 = out[12], d16 = t7 + + butterfly d5, d8, d20, d22 @ d5 =-out[15],d8 = t3a + butterfly d4, d9, d24, d26 @ d4 = out[14],d9 = t11 + + mbutterfly0 d23, d24, d6, d8, d10, d11, q6, q7, 1 @ d23 = out[7], d24 = out[8] + mbutterfly0 d20, d27, d16, d31, d10, d11, q6, q7 @ d20 = out[4], d27 = out[11] + mbutterfly0 d22, d25, d9, d7, d10, d11, q6, q7 @ d22 = out[6], d25 = out[9] + mbutterfly0 d21, d26, d30, d17, d10, d11, q6, q7, 1 @ d21 = out[5], d26 = out[10] + + vneg.s16 d31, d5 @ d31 = out[15] + vneg.s16 d17, d3 @ d17 = out[1] + + vmov d16, d2 + vmov d30, d4 +.endm + +.macro itxfm16_1d_funcs txfm +@ Read a vertical 4x16 slice out of a 16x16 matrix, do a transform on it, +@ transpose into a horizontal 16x4 slice and store. +@ r0 = dst (temp buffer) +@ r1 = slice offset +@ r2 = src +function \txfm\()16_1d_4x16_pass1_neon + mov r12, #32 + vmov.s16 q2, #0 +.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 + vld1.16 {d\i}, [r2,:64] + vst1.16 {d4}, [r2,:64], r12 +.endr + + \txfm\()16 + + @ Do four 4x4 transposes. Originally, d16-d31 contain the + @ 16 rows. Afterwards, d16-d19, d20-d23, d24-d27, d28-d31 + @ contain the transposed 4x4 blocks. + transpose16_q_4x_4x4 q8, q9, q10, q11, q12, q13, q14, q15, d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31 + + @ Store the transposed 4x4 blocks horizontally. + cmp r1, #12 + beq 1f +.irp i, 16, 20, 24, 28, 17, 21, 25, 29, 18, 22, 26, 30, 19, 23, 27, 31 + vst1.16 {d\i}, [r0,:64]! +.endr + bx lr +1: + @ Special case: For the last input column (r1 == 12), + @ which would be stored as the last row in the temp buffer, + @ don't store the first 4x4 block, but keep it in registers + @ for the first slice of the second pass (where it is the + @ last 4x4 block). + add r0, r0, #8 +.irp i, 20, 24, 28 + vst1.16 {d\i}, [r0,:64]! +.endr + add r0, r0, #8 +.irp i, 21, 25, 29 + vst1.16 {d\i}, [r0,:64]! +.endr + add r0, r0, #8 +.irp i, 22, 26, 30 + vst1.16 {d\i}, [r0,:64]! +.endr + add r0, r0, #8 +.irp i, 23, 27, 31 + vst1.16 {d\i}, [r0,:64]! +.endr + vmov d28, d16 + vmov d29, d17 + vmov d30, d18 + vmov d31, d19 + bx lr +endfunc + +@ Read a vertical 4x16 slice out of a 16x16 matrix, do a transform on it, +@ load the destination pixels (from a similar 4x16 slice), add and store back. +@ r0 = dst +@ r1 = dst stride +@ r2 = src (temp buffer) +@ r3 = slice offset +function \txfm\()16_1d_4x16_pass2_neon + mov r12, #32 +.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 + vld1.16 {d\i}, [r2,:64], r12 +.endr + cmp r3, #0 + beq 1f +.irp i, 28, 29, 30, 31 + vld1.16 {d\i}, [r2,:64], r12 +.endr +1: + + add r3, r0, r1 + lsl r1, r1, #1 + \txfm\()16 + +.macro load_add_store coef0, coef1, coef2, coef3 + vrshr.s16 \coef0, \coef0, #6 + vrshr.s16 \coef1, \coef1, #6 + + vld1.32 {d4[]}, [r0,:32], r1 + vld1.32 {d4[1]}, [r3,:32], r1 + vrshr.s16 \coef2, \coef2, #6 + vrshr.s16 \coef3, \coef3, #6 + vld1.32 {d5[]}, [r0,:32], r1 + vld1.32 {d5[1]}, [r3,:32], r1 + vaddw.u8 \coef0, \coef0, d4 + vld1.32 {d6[]}, [r0,:32], r1 + vld1.32 {d6[1]}, [r3,:32], r1 + vaddw.u8 \coef1, \coef1, d5 + vld1.32 {d7[]}, [r0,:32], r1 + vld1.32 {d7[1]}, [r3,:32], r1 + + vqmovun.s16 d4, \coef0 + vqmovun.s16 d5, \coef1 + sub r0, r0, r1, lsl #2 + sub r3, r3, r1, lsl #2 + vaddw.u8 \coef2, \coef2, d6 + vaddw.u8 \coef3, \coef3, d7 + vst1.32 {d4[0]}, [r0,:32], r1 + vst1.32 {d4[1]}, [r3,:32], r1 + vqmovun.s16 d6, \coef2 + vst1.32 {d5[0]}, [r0,:32], r1 + vst1.32 {d5[1]}, [r3,:32], r1 + vqmovun.s16 d7, \coef3 + + vst1.32 {d6[0]}, [r0,:32], r1 + vst1.32 {d6[1]}, [r3,:32], r1 + vst1.32 {d7[0]}, [r0,:32], r1 + vst1.32 {d7[1]}, [r3,:32], r1 +.endm + load_add_store q8, q9, q10, q11 + load_add_store q12, q13, q14, q15 +.purgem load_add_store + + bx lr +endfunc +.endm + +itxfm16_1d_funcs idct +itxfm16_1d_funcs iadst + +@ This is the minimum eob value for each subpartition, in increments of 4 +const min_eob_idct_idct_16, align=4 + .short 0, 10, 38, 89 +endconst + +.macro itxfm_func16x16 txfm1, txfm2 +function ff_vp9_\txfm1\()_\txfm2\()_16x16_add_neon, export=1 +.ifc \txfm1\()_\txfm2,idct_idct + cmp r3, #1 + beq idct16x16_dc_add_neon +.endif + push {r4-r8,lr} +.ifnc \txfm1\()_\txfm2,idct_idct + vpush {q4-q7} +.else + movrel r8, min_eob_idct_idct_16 + 2 +.endif + + @ Align the stack, allocate a temp buffer +T mov r7, sp +T and r7, r7, #15 +A and r7, sp, #15 + add r7, r7, #512 + sub sp, sp, r7 + + mov r4, r0 + mov r5, r1 + mov r6, r2 + +.ifc \txfm1,idct + movrel r12, idct_coeffs + vld1.16 {q0-q1}, [r12,:128] +.endif + +.irp i, 0, 4, 8, 12 + add r0, sp, #(\i*32) +.ifc \txfm1\()_\txfm2,idct_idct +.if \i > 0 + ldrh_post r1, r8, #2 + cmp r3, r1 + it le + movle r1, #(16 - \i)/4 + ble 1f +.endif +.endif + mov r1, #\i + add r2, r6, #(\i*2) + bl \txfm1\()16_1d_4x16_pass1_neon +.endr + +.ifc \txfm1\()_\txfm2,idct_idct + b 3f +1: + @ For all-zero slices in pass 1, set d28-d31 to zero, for the in-register + @ passthrough of coefficients to pass 2 and clear the end of the temp buffer + vmov.i16 q14, #0 + vmov.i16 q15, #0 +2: + subs r1, r1, #1 +.rept 4 + vst1.16 {q14-q15}, [r0,:128]! +.endr + bne 2b +3: +.endif + +.ifc \txfm1\()_\txfm2,iadst_idct + movrel r12, idct_coeffs + vld1.16 {q0-q1}, [r12,:128] +.endif +.irp i, 0, 4, 8, 12 + add r0, r4, #(\i) + mov r1, r5 + add r2, sp, #(\i*2) + mov r3, #\i + bl \txfm2\()16_1d_4x16_pass2_neon +.endr + + add sp, sp, r7 +.ifnc \txfm1\()_\txfm2,idct_idct + vpop {q4-q7} +.endif + pop {r4-r8,pc} +endfunc +.endm + +itxfm_func16x16 idct, idct +itxfm_func16x16 iadst, idct +itxfm_func16x16 idct, iadst +itxfm_func16x16 iadst, iadst +.ltorg + + +function idct32x32_dc_add_neon + movrel r12, idct_coeffs + vld1.16 {d0}, [r12,:64] + + vmov.i16 q2, #0 + + vld1.16 {d16[]}, [r2,:16] + vmull.s16 q8, d16, d0[0] + vrshrn.s32 d16, q8, #14 + vmull.s16 q8, d16, d0[0] + vrshrn.s32 d16, q8, #14 + vdup.16 q8, d16[0] + vst1.16 {d4[0]}, [r2,:16] + + vrshr.s16 q8, q8, #6 + + mov r12, #32 +1: + @ Loop to add the constant from q8 into all 32x32 outputs + vld1.8 {q2-q3}, [r0,:128] + vaddw.u8 q10, q8, d4 + vaddw.u8 q11, q8, d5 + vaddw.u8 q12, q8, d6 + vaddw.u8 q13, q8, d7 + vqmovun.s16 d4, q10 + vqmovun.s16 d5, q11 + vqmovun.s16 d6, q12 + vqmovun.s16 d7, q13 + vst1.8 {q2-q3}, [r0,:128], r1 + subs r12, r12, #1 + bne 1b + + bx lr +endfunc + +.macro idct32_odd + movrel r12, idct_coeffs + add r12, r12, #32 + vld1.16 {q0-q1}, [r12,:128] + + mbutterfly d16, d31, d0[0], d0[1], q2, q3 @ d16 = t16a, d31 = t31a + mbutterfly d24, d23, d0[2], d0[3], q2, q3 @ d24 = t17a, d23 = t30a + mbutterfly d20, d27, d1[0], d1[1], q2, q3 @ d20 = t18a, d27 = t29a + mbutterfly d28, d19, d1[2], d1[3], q2, q3 @ d28 = t19a, d19 = t28a + mbutterfly d18, d29, d2[0], d2[1], q2, q3 @ d18 = t20a, d29 = t27a + mbutterfly d26, d21, d2[2], d2[3], q2, q3 @ d26 = t21a, d21 = t26a + mbutterfly d22, d25, d3[0], d3[1], q2, q3 @ d22 = t22a, d25 = t25a + mbutterfly d30, d17, d3[2], d3[3], q2, q3 @ d30 = t23a, d17 = t24a + + sub r12, r12, #32 + vld1.16 {q0}, [r12,:128] + + butterfly d4, d24, d16, d24 @ d4 = t16, d24 = t17 + butterfly d5, d20, d28, d20 @ d5 = t19, d20 = t18 + butterfly d6, d26, d18, d26 @ d6 = t20, d26 = t21 + butterfly d7, d22, d30, d22 @ d7 = t23, d22 = t22 + butterfly d28, d25, d17, d25 @ d28 = t24, d25 = t25 + butterfly d30, d21, d29, d21 @ d30 = t27, d21 = t26 + butterfly d29, d23, d31, d23 @ d29 = t31, d23 = t30 + butterfly d31, d27, d19, d27 @ d31 = t28, d27 = t29 + + mbutterfly d23, d24, d0[3], d1[0], q8, q9 @ d23 = t17a, d24 = t30a + mbutterfly d27, d20, d0[3], d1[0], q8, q9, neg=1 @ d27 = t29a, d20 = t18a + mbutterfly d21, d26, d1[1], d1[2], q8, q9 @ d21 = t21a, d26 = t26a + mbutterfly d25, d22, d1[1], d1[2], q8, q9, neg=1 @ d25 = t25a, d22 = t22a + + butterfly d16, d5, d4, d5 @ d16 = t16a, d5 = t19a + butterfly d17, d20, d23, d20 @ d17 = t17, d20 = t18 + butterfly d18, d6, d7, d6 @ d18 = t23a, d6 = t20a + butterfly d19, d21, d22, d21 @ d19 = t22, d21 = t21 + butterfly d4, d28, d28, d30 @ d4 = t24a, d28 = t27a + butterfly d23, d26, d25, d26 @ d23 = t25, d26 = t26 + butterfly d7, d29, d29, d31 @ d7 = t31a, d29 = t28a + butterfly d22, d27, d24, d27 @ d22 = t30, d27 = t29 + + mbutterfly d27, d20, d0[1], d0[2], q12, q15 @ d27 = t18a, d20 = t29a + mbutterfly d29, d5, d0[1], d0[2], q12, q15 @ d29 = t19, d5 = t28 + mbutterfly d28, d6, d0[1], d0[2], q12, q15, neg=1 @ d28 = t27, d6 = t20 + mbutterfly d26, d21, d0[1], d0[2], q12, q15, neg=1 @ d26 = t26a, d21 = t21a + + butterfly d31, d24, d7, d4 @ d31 = t31, d24 = t24 + butterfly d30, d25, d22, d23 @ d30 = t30a, d25 = t25a + butterfly_r d23, d16, d16, d18 @ d23 = t23, d16 = t16 + butterfly_r d22, d17, d17, d19 @ d22 = t22a, d17 = t17a + butterfly d18, d21, d27, d21 @ d18 = t18, d21 = t21 + butterfly_r d27, d28, d5, d28 @ d27 = t27a, d28 = t28a + butterfly d4, d26, d20, d26 @ d4 = t29, d26 = t26 + butterfly d19, d20, d29, d6 @ d19 = t19a, d20 = t20 + vmov d29, d4 @ d29 = t29 + + mbutterfly0 d27, d20, d27, d20, d4, d6, q2, q3 @ d27 = t27, d20 = t20 + mbutterfly0 d26, d21, d26, d21, d4, d6, q2, q3 @ d26 = t26a, d21 = t21a + mbutterfly0 d25, d22, d25, d22, d4, d6, q2, q3 @ d25 = t25, d22 = t22 + mbutterfly0 d24, d23, d24, d23, d4, d6, q2, q3 @ d24 = t24a, d23 = t23a +.endm + +@ Do an 32-point IDCT of a 4x32 slice out of a 32x32 matrix. +@ We don't have register space to do a single pass IDCT of 4x32 though, +@ but the 32-point IDCT can be decomposed into two 16-point IDCTs; +@ a normal IDCT16 with every other input component (the even ones, with +@ each output written twice), followed by a separate 16-point IDCT +@ of the odd inputs, added/subtracted onto the outputs of the first idct16. +@ r0 = dst (temp buffer) +@ r1 = unused +@ r2 = src +function idct32_1d_4x32_pass1_neon + movrel r12, idct_coeffs + vld1.16 {q0-q1}, [r12,:128] + + @ Double stride of the input, since we only read every other line + mov r12, #128 + vmov.s16 d4, #0 + + @ d16 = IN(0), d17 = IN(2) ... d31 = IN(30) +.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 + vld1.16 {d\i}, [r2,:64] + vst1.16 {d4}, [r2,:64], r12 +.endr + + idct16 + + @ Do four 4x4 transposes. Originally, d16-d31 contain the + @ 16 rows. Afterwards, d16-d19, d20-d23, d24-d27, d28-d31 + @ contain the transposed 4x4 blocks. + transpose16_q_4x_4x4 q8, q9, q10, q11, q12, q13, q14, q15, d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31 + @ Store the registers a, b, c, d horizontally, followed + @ by the same registers d, c, b, a mirrored. +.macro store_rev a, b, c, d +.irp i, \a, \b, \c, \d + vst1.16 {d\i}, [r0,:64]! + vrev64.16 d\i, d\i +.endr +.irp i, \d, \c, \b, \a + vst1.16 {d\i}, [r0,:64]! +.endr +.endm + store_rev 16, 20, 24, 28 + store_rev 17, 21, 25, 29 + store_rev 18, 22, 26, 30 + store_rev 19, 23, 27, 31 + sub r0, r0, #256 +.purgem store_rev + + @ Move r2 back to the start of the input, and move + @ to the first odd row + sub r2, r2, r12, lsl #4 + add r2, r2, #64 + + vmov.s16 d4, #0 + @ d16 = IN(1), d17 = IN(3) ... d31 = IN(31) +.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 + vld1.16 {d\i}, [r2,:64] + vst1.16 {d4}, [r2,:64], r12 +.endr + + idct32_odd + + transpose16_q_4x_4x4 q15, q14, q13, q12, q11, q10, q9, q8, d31, d30, d29, d28, d27, d26, d25, d24, d23, d22, d21, d20, d19, d18, d17, d16 + + @ Store the registers a, b, c, d horizontally, + @ adding into the output first, and then mirrored, subtracted + @ from the output. +.macro store_rev a, b, c, d +.irp i, \a, \b, \c, \d + vld1.16 {d4}, [r0,:64] + vadd.s16 d4, d4, d\i + vst1.16 {d4}, [r0,:64]! + vrev64.16 d\i, d\i +.endr +.irp i, \d, \c, \b, \a + vld1.16 {d4}, [r0,:64] + vsub.s16 d4, d4, d\i + vst1.16 {d4}, [r0,:64]! +.endr +.endm + + store_rev 31, 27, 23, 19 + store_rev 30, 26, 22, 18 + store_rev 29, 25, 21, 17 + store_rev 28, 24, 20, 16 +.purgem store_rev + bx lr +endfunc +.ltorg + +@ This is mostly the same as 4x32_pass1, but without the transpose, +@ and use the source as temp buffer between the two idct passes, and +@ add into the destination. +@ r0 = dst +@ r1 = dst stride +@ r2 = src (temp buffer) +function idct32_1d_4x32_pass2_neon + movrel r12, idct_coeffs + vld1.16 {q0-q1}, [r12,:128] + + mov r12, #128 + @ d16 = IN(0), d17 = IN(2) ... d31 = IN(30) +.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 + vld1.16 {d\i}, [r2,:64], r12 +.endr + sub r2, r2, r12, lsl #4 + + idct16 + +.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 + vst1.16 {d\i}, [r2,:64], r12 +.endr + + sub r2, r2, r12, lsl #4 + add r2, r2, #64 + + @ d16 = IN(1), d17 = IN(3) ... d31 = IN(31) +.irp i, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 + vld1.16 {d\i}, [r2,:64], r12 +.endr + sub r2, r2, r12, lsl #4 + sub r2, r2, #64 + + idct32_odd + + mov r12, #128 +.macro load_acc_store a, b, c, d, neg=0 + vld1.16 {d4}, [r2,:64], r12 + vld1.16 {d5}, [r2,:64], r12 +.if \neg == 0 + vadd.s16 d4, d4, d\a + vld1.16 {d6}, [r2,:64], r12 + vadd.s16 d5, d5, d\b + vld1.16 {d7}, [r2,:64], r12 + vadd.s16 d6, d6, d\c + vadd.s16 d7, d7, d\d +.else + vsub.s16 d4, d4, d\a + vld1.16 {d6}, [r2,:64], r12 + vsub.s16 d5, d5, d\b + vld1.16 {d7}, [r2,:64], r12 + vsub.s16 d6, d6, d\c + vsub.s16 d7, d7, d\d +.endif + vld1.32 {d2[]}, [r0,:32], r1 + vld1.32 {d2[1]}, [r0,:32], r1 + vrshr.s16 q2, q2, #6 + vld1.32 {d3[]}, [r0,:32], r1 + vrshr.s16 q3, q3, #6 + vld1.32 {d3[1]}, [r0,:32], r1 + sub r0, r0, r1, lsl #2 + vaddw.u8 q2, q2, d2 + vaddw.u8 q3, q3, d3 + vqmovun.s16 d4, q2 + vqmovun.s16 d5, q3 + vst1.32 {d4[0]}, [r0,:32], r1 + vst1.32 {d4[1]}, [r0,:32], r1 + vst1.32 {d5[0]}, [r0,:32], r1 + vst1.32 {d5[1]}, [r0,:32], r1 +.endm + load_acc_store 31, 30, 29, 28 + load_acc_store 27, 26, 25, 24 + load_acc_store 23, 22, 21, 20 + load_acc_store 19, 18, 17, 16 + sub r2, r2, r12 + neg r12, r12 + load_acc_store 16, 17, 18, 19, 1 + load_acc_store 20, 21, 22, 23, 1 + load_acc_store 24, 25, 26, 27, 1 + load_acc_store 28, 29, 30, 31, 1 +.purgem load_acc_store + bx lr +endfunc + +const min_eob_idct_idct_32, align=4 + .short 0, 9, 34, 70, 135, 240, 336, 448 +endconst + +function ff_vp9_idct_idct_32x32_add_neon, export=1 + cmp r3, #1 + beq idct32x32_dc_add_neon + push {r4-r8,lr} + vpush {q4-q7} + movrel r8, min_eob_idct_idct_32 + 2 + + @ Align the stack, allocate a temp buffer +T mov r7, sp +T and r7, r7, #15 +A and r7, sp, #15 + add r7, r7, #2048 + sub sp, sp, r7 + + mov r4, r0 + mov r5, r1 + mov r6, r2 + +.irp i, 0, 4, 8, 12, 16, 20, 24, 28 + add r0, sp, #(\i*64) +.if \i > 0 + ldrh_post r1, r8, #2 + cmp r3, r1 + it le + movle r1, #(32 - \i)/2 + ble 1f +.endif + add r2, r6, #(\i*2) + bl idct32_1d_4x32_pass1_neon +.endr + b 3f + +1: + @ Write zeros to the temp buffer for pass 2 + vmov.i16 q14, #0 + vmov.i16 q15, #0 +2: + subs r1, r1, #1 +.rept 4 + vst1.16 {q14-q15}, [r0,:128]! +.endr + bne 2b +3: +.irp i, 0, 4, 8, 12, 16, 20, 24, 28 + add r0, r4, #(\i) + mov r1, r5 + add r2, sp, #(\i*2) + bl idct32_1d_4x32_pass2_neon +.endr + + add sp, sp, r7 + vpop {q4-q7} + pop {r4-r8,pc} +endfunc |