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+/*
+ * Copyright (c) 2017 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/aarch64/asm.S"
+#include "neon.S"
+
+
+// The input to and output from this macro is in the registers v16-v31,
+// and v0-v7 are used as scratch registers.
+// p7 = v16 .. p3 = v20, p0 = v23, q0 = v24, q3 = v27, q7 = v31
+// Depending on the width of the loop filter, we either use v16-v19
+// and v28-v31 as temp registers, or v8-v15.
+.macro loop_filter wd, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8
+ dup v0.8h, w2 // E
+ dup v2.8h, w3 // I
+ dup v3.8h, w4 // H
+
+ uabd v4.8h, v20.8h, v21.8h // abs(p3 - p2)
+ uabd v5.8h, v21.8h, v22.8h // abs(p2 - p1)
+ uabd v6.8h, v22.8h, v23.8h // abs(p1 - p0)
+ uabd v7.8h, v24.8h, v25.8h // abs(q0 - q1)
+ uabd \tmp1\().8h, v25.8h, v26.8h // abs(q1 - q2)
+ uabd \tmp2\().8h, v26.8h, v27.8h // abs(q2 - q3)
+ umax v4.8h, v4.8h, v5.8h
+ umax v5.8h, v6.8h, v7.8h
+ umax \tmp1\().8h, \tmp1\().8h, \tmp2\().8h
+ uabd v6.8h, v23.8h, v24.8h // abs(p0 - q0)
+ umax v4.8h, v4.8h, v5.8h
+ add v6.8h, v6.8h, v6.8h // abs(p0 - q0) * 2
+ uabd v5.8h, v22.8h, v25.8h // abs(p1 - q1)
+ umax v4.8h, v4.8h, \tmp1\().8h // max(abs(p3 - p2), ..., abs(q2 - q3))
+ ushr v5.8h, v5.8h, #1
+ cmhs v4.8h, v2.8h, v4.8h // max(abs()) <= I
+ add v6.8h, v6.8h, v5.8h // abs(p0 - q0) * 2 + abs(p1 - q1) >> 1
+ cmhs v6.8h, v0.8h, v6.8h
+ and v4.16b, v4.16b, v6.16b // fm
+
+ // If no pixels need filtering, just exit as soon as possible
+ mov x11, v4.d[0]
+ mov x12, v4.d[1]
+ adds x11, x11, x12
+ b.ne 1f
+ ret x10
+1:
+
+.if \wd >= 8
+ dup v0.8h, w5
+
+ uabd v6.8h, v20.8h, v23.8h // abs(p3 - p0)
+ uabd v2.8h, v21.8h, v23.8h // abs(p2 - p0)
+ uabd v1.8h, v22.8h, v23.8h // abs(p1 - p0)
+ uabd \tmp1\().8h, v25.8h, v24.8h // abs(q1 - q0)
+ uabd \tmp2\().8h, v26.8h, v24.8h // abs(q2 - q0)
+ uabd \tmp3\().8h, v27.8h, v24.8h // abs(q3 - q0)
+ umax v6.8h, v6.8h, v2.8h
+ umax v1.8h, v1.8h, \tmp1\().8h
+ umax \tmp2\().8h, \tmp2\().8h, \tmp3\().8h
+.if \wd == 16
+ uabd v7.8h, v16.8h, v23.8h // abs(p7 - p0)
+ umax v6.8h, v6.8h, v1.8h
+ uabd v2.8h, v17.8h, v23.8h // abs(p6 - p0)
+ umax v6.8h, v6.8h, \tmp2\().8h
+ uabd v1.8h, v18.8h, v23.8h // abs(p5 - p0)
+ cmhs v6.8h, v0.8h, v6.8h // flat8in
+ uabd v8.8h, v19.8h, v23.8h // abs(p4 - p0)
+ and v6.16b, v6.16b, v4.16b // flat8in && fm
+ uabd v9.8h, v28.8h, v24.8h // abs(q4 - q0)
+ bic v4.16b, v4.16b, v6.16b // fm && !flat8in
+ uabd v10.8h, v29.8h, v24.8h // abs(q5 - q0)
+ uabd v11.8h, v30.8h, v24.8h // abs(q6 - q0)
+ uabd v12.8h, v31.8h, v24.8h // abs(q7 - q0)
+
+ umax v7.8h, v7.8h, v2.8h
+ umax v1.8h, v1.8h, v8.8h
+ umax v9.8h, v9.8h, v10.8h
+ umax v11.8h, v11.8h, v12.8h
+ // The rest of the calculation of flat8out is interleaved below
+.else
+ // The rest of the calculation of flat8in is interleaved below
+.endif
+.endif
+
+ // Calculate the normal inner loop filter for 2 or 4 pixels
+ uabd v5.8h, v22.8h, v23.8h // abs(p1 - p0)
+.if \wd == 16
+ umax v7.8h, v7.8h, v1.8h
+ umax v9.8h, v9.8h, v11.8h
+.elseif \wd == 8
+ umax v6.8h, v6.8h, v1.8h
+.endif
+ uabd v1.8h, v25.8h, v24.8h // abs(q1 - q0)
+.if \wd == 16
+ umax v7.8h, v7.8h, v9.8h
+.elseif \wd == 8
+ umax v6.8h, v6.8h, \tmp2\().8h
+.endif
+ dup \tmp2\().8h, w6 // left shift for saturation
+ sub \tmp1\().8h, v22.8h, v25.8h // p1 - q1
+ neg \tmp6\().8h, \tmp2\().8h // negative left shift after saturation
+ umax v5.8h, v5.8h, v1.8h // max(abs(p1 - p0), abs(q1 - q0))
+ sub \tmp3\().8h, v24.8h, v23.8h // q0 - p0
+ movi \tmp5\().8h, #3
+.if \wd == 8
+ cmhs v6.8h, v0.8h, v6.8h // flat8in
+.endif
+ cmhs v5.8h, v3.8h, v5.8h // !hev
+.if \wd == 8
+ and v6.16b, v6.16b, v4.16b // flat8in && fm
+.endif
+ sqshl \tmp1\().8h, \tmp1\().8h, \tmp2\().8h
+.if \wd == 16
+ cmhs v7.8h, v0.8h, v7.8h // flat8out
+.elseif \wd == 8
+ bic v4.16b, v4.16b, v6.16b // fm && !flat8in
+.endif
+ and v5.16b, v5.16b, v4.16b // !hev && fm && !flat8in
+.if \wd == 16
+ and v7.16b, v7.16b, v6.16b // flat8out && flat8in && fm
+.endif
+ sshl \tmp1\().8h, \tmp1\().8h, \tmp6\().8h // av_clip_int2p(p1 - q1, BIT_DEPTH - 1)
+
+ mul \tmp3\().8h, \tmp3\().8h, \tmp5\().8h // 3 * (q0 - p0)
+ bic \tmp1\().16b, \tmp1\().16b, v5.16b // if (!hev) av_clip_int8 = 0
+ movi v2.8h, #4
+ add \tmp3\().8h, \tmp3\().8h, \tmp1\().8h // 3 * (q0 - p0) [+ av_clip_int8(p1 - q1)]
+ movi v3.8h, #3
+ sqshl \tmp1\().8h, \tmp3\().8h, \tmp2\().8h
+ movi \tmp5\().8h, #0
+ sshl \tmp1\().8h, \tmp1\().8h, \tmp6\().8h // av_clip_int2p(3 * (q0 - p0) [+ av_clip_int2p(p1 - q1)], BIT_DEPTH - 1) = f
+ dup \tmp6\().8h, w7 // max pixel value
+.if \wd == 16
+ bic v6.16b, v6.16b, v7.16b // fm && flat8in && !flat8out
+.endif
+
+ ushr \tmp2\().8h, \tmp6\().8h, #1 // (1 << (BIT_DEPTH - 1)) - 1
+
+ add \tmp3\().8h, \tmp1\().8h, v2.8h // f + 4
+ add \tmp4\().8h, \tmp1\().8h, v3.8h // f + 3
+ smin \tmp3\().8h, \tmp3\().8h, \tmp2\().8h // FFMIN(f + 4, (1 << (BIT_DEPTH - 1)) - 1)
+ smin \tmp4\().8h, \tmp4\().8h, \tmp2\().8h // FFMIN(f + 3, (1 << (BIT_DEPTH - 1)) - 1)
+ sshr \tmp3\().8h, \tmp3\().8h, #3 // f1
+ sshr \tmp4\().8h, \tmp4\().8h, #3 // f2
+
+ add v0.8h, v23.8h, \tmp4\().8h // p0 + f2
+ sub v2.8h, v24.8h, \tmp3\().8h // q0 - f1
+ smin v0.8h, v0.8h, \tmp6\().8h
+ smin v2.8h, v2.8h, \tmp6\().8h
+ srshr \tmp3\().8h, \tmp3\().8h, #1 // f = (f1 + 1) >> 1
+ smax v0.8h, v0.8h, \tmp5\().8h // out p0
+ smax v2.8h, v2.8h, \tmp5\().8h // out q0
+ bit v23.16b, v0.16b, v4.16b // if (fm && !flat8in)
+ bit v24.16b, v2.16b, v4.16b
+
+ add v0.8h, v22.8h, \tmp3\().8h // p1 + f
+ sub v2.8h, v25.8h, \tmp3\().8h // q1 - f
+.if \wd >= 8
+ mov x11, v6.d[0]
+.endif
+ smin v0.8h, v0.8h, \tmp6\().8h
+ smin v2.8h, v2.8h, \tmp6\().8h
+.if \wd >= 8
+ mov x12, v6.d[1]
+.endif
+ smax v0.8h, v0.8h, \tmp5\().8h // out p1
+ smax v2.8h, v2.8h, \tmp5\().8h // out q1
+.if \wd >= 8
+ adds x11, x11, x12
+.endif
+ bit v22.16b, v0.16b, v5.16b // if (!hev && fm && !flat8in)
+ bit v25.16b, v2.16b, v5.16b
+
+ // If no pixels need flat8in, jump to flat8out
+ // (or to a writeout of the inner 4 pixels, for wd=8)
+.if \wd >= 8
+.if \wd == 16
+ b.eq 6f
+.else
+ b.ne 1f
+ ret x13
+1:
+.endif
+
+ // flat8in
+ add \tmp1\().8h, v20.8h, v21.8h
+ add \tmp3\().8h, v22.8h, v25.8h
+ add \tmp5\().8h, v20.8h, v22.8h
+ add \tmp7\().8h, v23.8h, v26.8h
+ add v0.8h, \tmp1\().8h, \tmp1\().8h
+ add v0.8h, v0.8h, v23.8h
+ add v0.8h, v0.8h, v24.8h
+ add v0.8h, v0.8h, \tmp5\().8h
+ sub \tmp3\().8h, \tmp3\().8h, \tmp1\().8h
+ sub \tmp7\().8h, \tmp7\().8h, \tmp5\().8h
+ urshr v2.8h, v0.8h, #3 // out p2
+
+ add v0.8h, v0.8h, \tmp3\().8h
+ add \tmp1\().8h, v20.8h, v23.8h
+ add \tmp3\().8h, v24.8h, v27.8h
+ urshr v3.8h, v0.8h, #3 // out p1
+
+ add v0.8h, v0.8h, \tmp7\().8h
+ sub \tmp3\().8h, \tmp3\().8h, \tmp1\().8h
+ add \tmp5\().8h, v21.8h, v24.8h
+ add \tmp7\().8h, v25.8h, v27.8h
+ urshr v4.8h, v0.8h, #3 // out p0
+
+ add v0.8h, v0.8h, \tmp3\().8h
+ sub \tmp7\().8h, \tmp7\().8h, \tmp5\().8h
+ add \tmp1\().8h, v22.8h, v25.8h
+ add \tmp3\().8h, v26.8h, v27.8h
+ urshr v5.8h, v0.8h, #3 // out q0
+
+ add v0.8h, v0.8h, \tmp7\().8h
+ sub \tmp3\().8h, \tmp3\().8h, \tmp1\().8h
+ urshr \tmp5\().8h, v0.8h, #3 // out q1
+
+ add v0.8h, v0.8h, \tmp3\().8h
+ // The output here is written back into the input registers. This doesn't
+ // matter for the flat8part below, since we only update those pixels
+ // which won't be touched below.
+ bit v21.16b, v2.16b, v6.16b
+ bit v22.16b, v3.16b, v6.16b
+ bit v23.16b, v4.16b, v6.16b
+ urshr \tmp6\().8h, v0.8h, #3 // out q2
+ bit v24.16b, v5.16b, v6.16b
+ bit v25.16b, \tmp5\().16b, v6.16b
+ bit v26.16b, \tmp6\().16b, v6.16b
+.endif
+.if \wd == 16
+6:
+ orr v2.16b, v6.16b, v7.16b
+ mov x11, v2.d[0]
+ mov x12, v2.d[1]
+ adds x11, x11, x12
+ b.ne 1f
+ // If no pixels needed flat8in nor flat8out, jump to a
+ // writeout of the inner 4 pixels
+ ret x14
+1:
+
+ mov x11, v7.d[0]
+ mov x12, v7.d[1]
+ adds x11, x11, x12
+ b.ne 1f
+ // If no pixels need flat8out, jump to a writeout of the inner 6 pixels
+ ret x15
+
+1:
+ // flat8out
+ // This writes all outputs into v2-v17 (skipping v6 and v16).
+ // If this part is skipped, the output is read from v21-v26 (which is the input
+ // to this section).
+ shl v0.8h, v16.8h, #3 // 8 * v16
+ sub v0.8h, v0.8h, v16.8h // 7 * v16
+ add v0.8h, v0.8h, v17.8h
+ add v8.8h, v17.8h, v18.8h
+ add v10.8h, v19.8h, v20.8h
+ add v0.8h, v0.8h, v8.8h
+ add v8.8h, v16.8h, v17.8h
+ add v12.8h, v21.8h, v22.8h
+ add v0.8h, v0.8h, v10.8h
+ add v10.8h, v18.8h, v25.8h
+ add v14.8h, v23.8h, v24.8h
+ sub v10.8h, v10.8h, v8.8h
+ add v0.8h, v0.8h, v12.8h
+ add v0.8h, v0.8h, v14.8h
+ add v12.8h, v16.8h, v18.8h
+ add v14.8h, v19.8h, v26.8h
+ urshr v2.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v10.8h
+ add v8.8h, v16.8h, v19.8h
+ add v10.8h, v20.8h, v27.8h
+ sub v14.8h, v14.8h, v12.8h
+ bif v2.16b, v17.16b, v7.16b
+ urshr v3.8h , v0.8h, #4
+
+ add v0.8h, v0.8h, v14.8h
+ add v12.8h, v16.8h, v20.8h
+ add v14.8h, v21.8h, v28.8h
+ sub v10.8h, v10.8h, v8.8h
+ bif v3.16b, v18.16b, v7.16b
+ urshr v4.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v10.8h
+ add v8.8h, v16.8h, v21.8h
+ add v10.8h, v22.8h, v29.8h
+ sub v14.8h, v14.8h, v12.8h
+ bif v4.16b, v19.16b, v7.16b
+ urshr v5.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v14.8h
+ add v12.8h, v16.8h, v22.8h
+ add v14.8h, v23.8h, v30.8h
+ sub v10.8h, v10.8h, v8.8h
+ bif v5.16b, v20.16b, v7.16b
+ urshr v6.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v10.8h
+ add v10.8h, v16.8h, v23.8h
+ sub v14.8h, v14.8h, v12.8h
+ add v12.8h, v24.8h, v31.8h
+ bif v6.16b, v21.16b, v7.16b
+ urshr v8.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v14.8h
+ sub v10.8h, v12.8h, v10.8h
+ add v12.8h, v17.8h, v24.8h
+ add v14.8h, v25.8h, v31.8h
+ bif v8.16b, v22.16b, v7.16b
+ urshr v9.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v10.8h
+ sub v14.8h, v14.8h, v12.8h
+ add v12.8h, v26.8h, v31.8h
+ bif v9.16b, v23.16b, v7.16b
+ urshr v10.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v14.8h
+ add v14.8h, v18.8h, v25.8h
+ add v18.8h, v19.8h, v26.8h
+ sub v12.8h, v12.8h, v14.8h
+ add v14.8h, v27.8h, v31.8h
+ bif v10.16b, v24.16b, v7.16b
+ urshr v11.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v12.8h
+ add v12.8h, v20.8h, v27.8h
+ sub v14.8h, v14.8h, v18.8h
+ add v18.8h, v28.8h, v31.8h
+ bif v11.16b, v25.16b, v7.16b
+ sub v18.8h, v18.8h, v12.8h
+ urshr v12.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v14.8h
+ add v14.8h, v21.8h, v28.8h
+ add v20.8h, v29.8h, v31.8h
+ bif v12.16b, v26.16b, v7.16b
+ urshr v13.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v18.8h
+ sub v20.8h, v20.8h, v14.8h
+ add v18.8h, v22.8h, v29.8h
+ add v22.8h, v30.8h, v31.8h
+ bif v13.16b, v27.16b, v7.16b
+ urshr v14.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v20.8h
+ sub v22.8h, v22.8h, v18.8h
+ bif v14.16b, v28.16b, v7.16b
+ urshr v15.8h, v0.8h, #4
+
+ add v0.8h, v0.8h, v22.8h
+ bif v15.16b, v29.16b, v7.16b
+ urshr v17.8h, v0.8h, #4
+ bif v17.16b, v30.16b, v7.16b
+.endif
+.endm
+
+// For wd <= 8, we use v16-v19 and v28-v31 for temp registers,
+// while we need those for inputs/outputs in wd=16 and use v8-v15
+// for temp registers there instead.
+function vp9_loop_filter_4
+ loop_filter 4, v16, v17, v18, v19, v28, v29, v30, v31
+ ret
+endfunc
+
+function vp9_loop_filter_8
+ loop_filter 8, v16, v17, v18, v19, v28, v29, v30, v31
+ ret
+endfunc
+
+function vp9_loop_filter_16
+ loop_filter 16, v8, v9, v10, v11, v12, v13, v14, v15
+ ret
+endfunc
+
+.macro loop_filter_4
+ bl vp9_loop_filter_4
+.endm
+
+.macro loop_filter_8
+ // calculate alternative 'return' targets
+ adr x13, 6f
+ bl vp9_loop_filter_8
+.endm
+
+.macro loop_filter_16
+ // calculate alternative 'return' targets
+ adr x14, 7f
+ adr x15, 8f
+ bl vp9_loop_filter_16
+.endm
+
+
+// The public functions in this file have got the following signature:
+// void loop_filter(uint8_t *dst, ptrdiff_t stride, int mb_lim, int lim, int hev_thr);
+
+.macro bpp_frontend func, bpp, push
+function ff_\func\()_\bpp\()_neon, export=1
+.if \push
+ mov x16, x30
+ stp d8, d9, [sp, #-0x40]!
+ stp d14, d15, [sp, #0x30]
+ stp d12, d13, [sp, #0x20]
+ stp d10, d11, [sp, #0x10]
+.endif
+ lsl w2, w2, #\bpp - 8
+ lsl w3, w3, #\bpp - 8
+ lsl w4, w4, #\bpp - 8
+ mov x5, #1 << (\bpp - 8)
+ mov x6, #16 - \bpp
+ mov x7, #((1 << \bpp) - 1)
+.if \push
+ bl \func\()_16_neon
+ ldp d10, d11, [sp, #0x10]
+ ldp d12, d13, [sp, #0x20]
+ ldp d14, d15, [sp, #0x30]
+ ldp d8, d9, [sp], #0x40
+ ret x16
+.else
+ b \func\()_16_neon
+.endif
+endfunc
+.endm
+
+.macro bpp_frontends func, push=0
+ bpp_frontend \func, 10, \push
+ bpp_frontend \func, 12, \push
+.endm
+
+.macro bpp_frontend_rep func, suffix, int_suffix, dir, bpp, push
+function ff_\func\()_\suffix\()_\bpp\()_neon, export=1
+ mov x16, x30
+.if \push
+ stp d8, d9, [sp, #-0x40]!
+ stp d14, d15, [sp, #0x30]
+ stp d12, d13, [sp, #0x20]
+ stp d10, d11, [sp, #0x10]
+.endif
+ lsl w2, w2, #\bpp - 8
+ lsl w3, w3, #\bpp - 8
+ lsl w4, w4, #\bpp - 8
+ mov x5, #1 << (\bpp - 8)
+ mov x6, #16 - \bpp
+ mov x7, #((1 << \bpp) - 1)
+ bl \func\()_\int_suffix\()_16_neon
+.ifc \dir,h
+ add x0, x0, x1, lsl #3
+.else
+ add x0, x0, #16
+.endif
+ bl \func\()_\int_suffix\()_16_neon
+.if \push
+ ldp d10, d11, [sp, #0x10]
+ ldp d12, d13, [sp, #0x20]
+ ldp d14, d15, [sp, #0x30]
+ ldp d8, d9, [sp], 0x40
+.endif
+ ret x16
+endfunc
+.endm
+
+.macro bpp_frontends_rep func, suffix, int_suffix, dir, push=0
+ bpp_frontend_rep \func, \suffix, \int_suffix, \dir, 10, \push
+ bpp_frontend_rep \func, \suffix, \int_suffix, \dir, 12, \push
+.endm
+
+.macro bpp_frontend_mix2 wd1, wd2, dir, bpp
+function ff_vp9_loop_filter_\dir\()_\wd1\()\wd2\()_16_\bpp\()_neon, export=1
+ mov x16, x30
+ lsr w8, w2, #8
+ lsr w14, w3, #8
+ lsr w15, w4, #8
+ and w2, w2, #0xff
+ and w3, w3, #0xff
+ and w4, w4, #0xff
+ lsl w2, w2, #\bpp - 8
+ lsl w3, w3, #\bpp - 8
+ lsl w4, w4, #\bpp - 8
+ mov x5, #1 << (\bpp - 8)
+ mov x6, #16 - \bpp
+ mov x7, #((1 << \bpp) - 1)
+ bl vp9_loop_filter_\dir\()_\wd1\()_8_16_neon
+.ifc \dir,h
+ add x0, x0, x1, lsl #3
+.else
+ add x0, x0, #16
+.endif
+ lsl w2, w8, #\bpp - 8
+ lsl w3, w14, #\bpp - 8
+ lsl w4, w15, #\bpp - 8
+ bl vp9_loop_filter_\dir\()_\wd2\()_8_16_neon
+ ret x16
+endfunc
+.endm
+
+.macro bpp_frontends_mix2 wd1, wd2
+ bpp_frontend_mix2 \wd1, \wd2, v, 10
+ bpp_frontend_mix2 \wd1, \wd2, v, 12
+ bpp_frontend_mix2 \wd1, \wd2, h, 10
+ bpp_frontend_mix2 \wd1, \wd2, h, 12
+.endm
+
+function vp9_loop_filter_v_4_8_16_neon
+ mov x10, x30
+ sub x9, x0, x1, lsl #2
+ ld1 {v20.8h}, [x9], x1 // p3
+ ld1 {v24.8h}, [x0], x1 // q0
+ ld1 {v21.8h}, [x9], x1 // p2
+ ld1 {v25.8h}, [x0], x1 // q1
+ ld1 {v22.8h}, [x9], x1 // p1
+ ld1 {v26.8h}, [x0], x1 // q2
+ ld1 {v23.8h}, [x9], x1 // p0
+ ld1 {v27.8h}, [x0], x1 // q3
+ sub x0, x0, x1, lsl #2
+ sub x9, x9, x1, lsl #1
+
+ loop_filter_4
+
+ st1 {v22.8h}, [x9], x1
+ st1 {v24.8h}, [x0], x1
+ st1 {v23.8h}, [x9], x1
+ st1 {v25.8h}, [x0], x1
+ sub x0, x0, x1, lsl #1
+
+ ret x10
+endfunc
+
+bpp_frontends vp9_loop_filter_v_4_8
+
+function vp9_loop_filter_h_4_8_16_neon
+ mov x10, x30
+ sub x9, x0, #8
+ add x0, x9, x1, lsl #2
+ ld1 {v20.8h}, [x9], x1
+ ld1 {v24.8h}, [x0], x1
+ ld1 {v21.8h}, [x9], x1
+ ld1 {v25.8h}, [x0], x1
+ ld1 {v22.8h}, [x9], x1
+ ld1 {v26.8h}, [x0], x1
+ ld1 {v23.8h}, [x9], x1
+ ld1 {v27.8h}, [x0], x1
+
+ sub x9, x9, x1, lsl #2
+ sub x0, x0, x1, lsl #3
+ add x0, x0, #8
+
+ transpose_8x8H v20, v21, v22, v23, v24, v25, v26, v27, v28, v29
+
+ loop_filter_4
+
+ // Move x9 forward by 2 pixels; we don't need to rewrite the
+ // outermost 2 pixels since they aren't changed.
+ add x9, x9, #4
+ add x0, x9, x1, lsl #2
+
+ // We only will write the mid 4 pixels back; after the loop filter,
+ // these are in v22, v23, v24, v25, ordered as rows (8x4 pixels).
+ // We need to transpose them to columns, done with a 4x8 transpose
+ // (which in practice is two 4x4 transposes of the two 4x4 halves
+ // of the 8x4 pixels; into 4x8 pixels).
+ transpose_4x8H v22, v23, v24, v25, v26, v27, v28, v29
+ st1 {v22.d}[0], [x9], x1
+ st1 {v22.d}[1], [x0], x1
+ st1 {v23.d}[0], [x9], x1
+ st1 {v23.d}[1], [x0], x1
+ st1 {v24.d}[0], [x9], x1
+ st1 {v24.d}[1], [x0], x1
+ st1 {v25.d}[0], [x9], x1
+ st1 {v25.d}[1], [x0], x1
+ sub x0, x0, x1, lsl #3
+ add x0, x0, #4
+
+ ret x10
+endfunc
+
+bpp_frontends vp9_loop_filter_h_4_8
+
+function vp9_loop_filter_v_8_8_16_neon
+ mov x10, x30
+ sub x9, x0, x1, lsl #2
+ ld1 {v20.8h}, [x9], x1 // p3
+ ld1 {v24.8h}, [x0], x1 // q0
+ ld1 {v21.8h}, [x9], x1 // p2
+ ld1 {v25.8h}, [x0], x1 // q1
+ ld1 {v22.8h}, [x9], x1 // p1
+ ld1 {v26.8h}, [x0], x1 // q2
+ ld1 {v23.8h}, [x9], x1 // p0
+ ld1 {v27.8h}, [x0], x1 // q3
+ sub x9, x9, x1, lsl #2
+ sub x0, x0, x1, lsl #2
+ add x9, x9, x1
+
+ loop_filter_8
+
+ st1 {v21.8h}, [x9], x1
+ st1 {v24.8h}, [x0], x1
+ st1 {v22.8h}, [x9], x1
+ st1 {v25.8h}, [x0], x1
+ st1 {v23.8h}, [x9], x1
+ st1 {v26.8h}, [x0], x1
+ sub x0, x0, x1, lsl #1
+ sub x0, x0, x1
+
+ ret x10
+6:
+ sub x9, x0, x1, lsl #1
+ st1 {v22.8h}, [x9], x1
+ st1 {v24.8h}, [x0], x1
+ st1 {v23.8h}, [x9], x1
+ st1 {v25.8h}, [x0], x1
+ sub x0, x0, x1, lsl #1
+ ret x10
+endfunc
+
+bpp_frontends vp9_loop_filter_v_8_8
+
+function vp9_loop_filter_h_8_8_16_neon
+ mov x10, x30
+ sub x9, x0, #8
+ add x0, x9, x1, lsl #2
+ ld1 {v20.8h}, [x9], x1
+ ld1 {v24.8h}, [x0], x1
+ ld1 {v21.8h}, [x9], x1
+ ld1 {v25.8h}, [x0], x1
+ ld1 {v22.8h}, [x9], x1
+ ld1 {v26.8h}, [x0], x1
+ ld1 {v23.8h}, [x9], x1
+ ld1 {v27.8h}, [x0], x1
+
+ sub x9, x9, x1, lsl #2
+ sub x0, x0, x1, lsl #3
+ add x0, x0, #8
+
+ transpose_8x8H v20, v21, v22, v23, v24, v25, v26, v27, v28, v29
+
+ loop_filter_8
+
+ add x0, x9, x1, lsl #2
+
+ // Even though only 6 pixels per row have been changed, we write the
+ // full 8 pixel registers.
+ transpose_8x8H v20, v21, v22, v23, v24, v25, v26, v27, v28, v29
+
+ st1 {v20.8h}, [x9], x1
+ st1 {v24.8h}, [x0], x1
+ st1 {v21.8h}, [x9], x1
+ st1 {v25.8h}, [x0], x1
+ st1 {v22.8h}, [x9], x1
+ st1 {v26.8h}, [x0], x1
+ st1 {v23.8h}, [x9], x1
+ st1 {v27.8h}, [x0], x1
+ sub x0, x0, x1, lsl #3
+ add x0, x0, #8
+
+ ret x10
+6:
+ // If we didn't need to do the flat8in part, we use the same writeback
+ // as in loop_filter_h_4_8.
+ add x9, x9, #4
+ add x0, x9, x1, lsl #2
+ transpose_4x8H v22, v23, v24, v25, v26, v27, v28, v29
+ st1 {v22.d}[0], [x9], x1
+ st1 {v22.d}[1], [x0], x1
+ st1 {v23.d}[0], [x9], x1
+ st1 {v23.d}[1], [x0], x1
+ st1 {v24.d}[0], [x9], x1
+ st1 {v24.d}[1], [x0], x1
+ st1 {v25.d}[0], [x9], x1
+ st1 {v25.d}[1], [x0], x1
+ sub x0, x0, x1, lsl #3
+ add x0, x0, #4
+ ret x10
+endfunc
+
+bpp_frontends vp9_loop_filter_h_8_8
+
+bpp_frontends_mix2 4, 4
+bpp_frontends_mix2 4, 8
+bpp_frontends_mix2 8, 4
+bpp_frontends_mix2 8, 8
+
+function vp9_loop_filter_v_16_8_16_neon
+ mov x10, x30
+ sub x9, x0, x1, lsl #3
+ ld1 {v16.8h}, [x9], x1 // p7
+ ld1 {v24.8h}, [x0], x1 // q0
+ ld1 {v17.8h}, [x9], x1 // p6
+ ld1 {v25.8h}, [x0], x1 // q1
+ ld1 {v18.8h}, [x9], x1 // p5
+ ld1 {v26.8h}, [x0], x1 // q2
+ ld1 {v19.8h}, [x9], x1 // p4
+ ld1 {v27.8h}, [x0], x1 // q3
+ ld1 {v20.8h}, [x9], x1 // p3
+ ld1 {v28.8h}, [x0], x1 // q4
+ ld1 {v21.8h}, [x9], x1 // p2
+ ld1 {v29.8h}, [x0], x1 // q5
+ ld1 {v22.8h}, [x9], x1 // p1
+ ld1 {v30.8h}, [x0], x1 // q6
+ ld1 {v23.8h}, [x9], x1 // p0
+ ld1 {v31.8h}, [x0], x1 // q7
+ sub x9, x9, x1, lsl #3
+ sub x0, x0, x1, lsl #3
+ add x9, x9, x1
+
+ loop_filter_16
+
+ // If we did the flat8out part, we get the output in
+ // v2-v17 (skipping v7 and v16). x9 points to x0 - 7 * stride,
+ // store v2-v9 there, and v10-v17 into x0.
+ st1 {v2.8h}, [x9], x1
+ st1 {v10.8h}, [x0], x1
+ st1 {v3.8h}, [x9], x1
+ st1 {v11.8h}, [x0], x1
+ st1 {v4.8h}, [x9], x1
+ st1 {v12.8h}, [x0], x1
+ st1 {v5.8h}, [x9], x1
+ st1 {v13.8h}, [x0], x1
+ st1 {v6.8h}, [x9], x1
+ st1 {v14.8h}, [x0], x1
+ st1 {v8.8h}, [x9], x1
+ st1 {v15.8h}, [x0], x1
+ st1 {v9.8h}, [x9], x1
+ st1 {v17.8h}, [x0], x1
+ sub x0, x0, x1, lsl #3
+ add x0, x0, x1
+
+ ret x10
+8:
+ add x9, x9, x1, lsl #2
+ // If we didn't do the flat8out part, the output is left in the
+ // input registers.
+ st1 {v21.8h}, [x9], x1
+ st1 {v24.8h}, [x0], x1
+ st1 {v22.8h}, [x9], x1
+ st1 {v25.8h}, [x0], x1
+ st1 {v23.8h}, [x9], x1
+ st1 {v26.8h}, [x0], x1
+ sub x0, x0, x1, lsl #1
+ sub x0, x0, x1
+ ret x10
+7:
+ sub x9, x0, x1, lsl #1
+ st1 {v22.8h}, [x9], x1
+ st1 {v24.8h}, [x0], x1
+ st1 {v23.8h}, [x9], x1
+ st1 {v25.8h}, [x0], x1
+ sub x0, x0, x1, lsl #1
+ ret x10
+endfunc
+
+bpp_frontends vp9_loop_filter_v_16_8, push=1
+bpp_frontends_rep vp9_loop_filter_v_16, 16, 8, v, push=1
+
+function vp9_loop_filter_h_16_8_16_neon
+ mov x10, x30
+ sub x9, x0, #16
+ ld1 {v16.8h}, [x9], x1
+ ld1 {v24.8h}, [x0], x1
+ ld1 {v17.8h}, [x9], x1
+ ld1 {v25.8h}, [x0], x1
+ ld1 {v18.8h}, [x9], x1
+ ld1 {v26.8h}, [x0], x1
+ ld1 {v19.8h}, [x9], x1
+ ld1 {v27.8h}, [x0], x1
+ ld1 {v20.8h}, [x9], x1
+ ld1 {v28.8h}, [x0], x1
+ ld1 {v21.8h}, [x9], x1
+ ld1 {v29.8h}, [x0], x1
+ ld1 {v22.8h}, [x9], x1
+ ld1 {v30.8h}, [x0], x1
+ ld1 {v23.8h}, [x9], x1
+ ld1 {v31.8h}, [x0], x1
+ sub x0, x0, x1, lsl #3
+ sub x9, x9, x1, lsl #3
+
+ // The 16x8 pixels read above is in two 8x8 blocks; the left
+ // half in v16-v23, and the right half in v24-v31. Do two 8x8 transposes
+ // of this, to get one column per register.
+ transpose_8x8H v16, v17, v18, v19, v20, v21, v22, v23, v0, v1
+ transpose_8x8H v24, v25, v26, v27, v28, v29, v30, v31, v0, v1
+
+ loop_filter_16
+
+ transpose_8x8H v16, v2, v3, v4, v5, v6, v8, v9, v0, v1
+ transpose_8x8H v10, v11, v12, v13, v14, v15, v17, v31, v0, v1
+
+ st1 {v16.8h}, [x9], x1
+ st1 {v10.8h}, [x0], x1
+ st1 {v2.8h}, [x9], x1
+ st1 {v11.8h}, [x0], x1
+ st1 {v3.8h}, [x9], x1
+ st1 {v12.8h}, [x0], x1
+ st1 {v4.8h}, [x9], x1
+ st1 {v13.8h}, [x0], x1
+ st1 {v5.8h}, [x9], x1
+ st1 {v14.8h}, [x0], x1
+ st1 {v6.8h}, [x9], x1
+ st1 {v15.8h}, [x0], x1
+ st1 {v8.8h}, [x9], x1
+ st1 {v17.8h}, [x0], x1
+ st1 {v9.8h}, [x9], x1
+ st1 {v31.8h}, [x0], x1
+ sub x0, x0, x1, lsl #3
+
+ ret x10
+8:
+ // The same writeback as in loop_filter_h_8_8
+ sub x9, x0, #8
+ add x0, x9, x1, lsl #2
+ transpose_8x8H v20, v21, v22, v23, v24, v25, v26, v27, v28, v29
+
+ st1 {v20.8h}, [x9], x1
+ st1 {v24.8h}, [x0], x1
+ st1 {v21.8h}, [x9], x1
+ st1 {v25.8h}, [x0], x1
+ st1 {v22.8h}, [x9], x1
+ st1 {v26.8h}, [x0], x1
+ st1 {v23.8h}, [x9], x1
+ st1 {v27.8h}, [x0], x1
+ sub x0, x0, x1, lsl #3
+ add x0, x0, #8
+ ret x10
+7:
+ // The same writeback as in loop_filter_h_4_8
+ sub x9, x0, #4
+ add x0, x9, x1, lsl #2
+ transpose_4x8H v22, v23, v24, v25, v26, v27, v28, v29
+ st1 {v22.d}[0], [x9], x1
+ st1 {v22.d}[1], [x0], x1
+ st1 {v23.d}[0], [x9], x1
+ st1 {v23.d}[1], [x0], x1
+ st1 {v24.d}[0], [x9], x1
+ st1 {v24.d}[1], [x0], x1
+ st1 {v25.d}[0], [x9], x1
+ st1 {v25.d}[1], [x0], x1
+ sub x0, x0, x1, lsl #3
+ add x0, x0, #4
+ ret x10
+endfunc
+
+bpp_frontends vp9_loop_filter_h_16_8, push=1
+bpp_frontends_rep vp9_loop_filter_h_16, 16, 8, h, push=1
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 14:31:21 +0000