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-rw-r--r--media/ffvpx/libavcodec/aarch64/idctdsp_neon.S130
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diff --git a/media/ffvpx/libavcodec/aarch64/idctdsp_neon.S b/media/ffvpx/libavcodec/aarch64/idctdsp_neon.S
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+/*
+ * IDCT AArch64 NEON optimisations
+ *
+ * Copyright (c) 2022 Ben Avison <bavison@riscosopen.org>
+ *
+ * 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"
+
+// Clamp 16-bit signed block coefficients to unsigned 8-bit
+// On entry:
+// x0 -> array of 64x 16-bit coefficients
+// x1 -> 8-bit results
+// x2 = row stride for results, bytes
+function ff_put_pixels_clamped_neon, export=1
+ ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], #64
+ ld1 {v4.16b, v5.16b, v6.16b, v7.16b}, [x0]
+ sqxtun v0.8b, v0.8h
+ sqxtun v1.8b, v1.8h
+ sqxtun v2.8b, v2.8h
+ sqxtun v3.8b, v3.8h
+ sqxtun v4.8b, v4.8h
+ st1 {v0.8b}, [x1], x2
+ sqxtun v0.8b, v5.8h
+ st1 {v1.8b}, [x1], x2
+ sqxtun v1.8b, v6.8h
+ st1 {v2.8b}, [x1], x2
+ sqxtun v2.8b, v7.8h
+ st1 {v3.8b}, [x1], x2
+ st1 {v4.8b}, [x1], x2
+ st1 {v0.8b}, [x1], x2
+ st1 {v1.8b}, [x1], x2
+ st1 {v2.8b}, [x1]
+ ret
+endfunc
+
+// Clamp 16-bit signed block coefficients to signed 8-bit (biased by 128)
+// On entry:
+// x0 -> array of 64x 16-bit coefficients
+// x1 -> 8-bit results
+// x2 = row stride for results, bytes
+function ff_put_signed_pixels_clamped_neon, export=1
+ ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], #64
+ movi v4.8b, #128
+ ld1 {v16.16b, v17.16b, v18.16b, v19.16b}, [x0]
+ sqxtn v0.8b, v0.8h
+ sqxtn v1.8b, v1.8h
+ sqxtn v2.8b, v2.8h
+ sqxtn v3.8b, v3.8h
+ sqxtn v5.8b, v16.8h
+ add v0.8b, v0.8b, v4.8b
+ sqxtn v6.8b, v17.8h
+ add v1.8b, v1.8b, v4.8b
+ sqxtn v7.8b, v18.8h
+ add v2.8b, v2.8b, v4.8b
+ sqxtn v16.8b, v19.8h
+ add v3.8b, v3.8b, v4.8b
+ st1 {v0.8b}, [x1], x2
+ add v0.8b, v5.8b, v4.8b
+ st1 {v1.8b}, [x1], x2
+ add v1.8b, v6.8b, v4.8b
+ st1 {v2.8b}, [x1], x2
+ add v2.8b, v7.8b, v4.8b
+ st1 {v3.8b}, [x1], x2
+ add v3.8b, v16.8b, v4.8b
+ st1 {v0.8b}, [x1], x2
+ st1 {v1.8b}, [x1], x2
+ st1 {v2.8b}, [x1], x2
+ st1 {v3.8b}, [x1]
+ ret
+endfunc
+
+// Add 16-bit signed block coefficients to unsigned 8-bit
+// On entry:
+// x0 -> array of 64x 16-bit coefficients
+// x1 -> 8-bit input and results
+// x2 = row stride for 8-bit input and results, bytes
+function ff_add_pixels_clamped_neon, export=1
+ ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], #64
+ mov x3, x1
+ ld1 {v4.8b}, [x1], x2
+ ld1 {v5.8b}, [x1], x2
+ ld1 {v6.8b}, [x1], x2
+ ld1 {v7.8b}, [x1], x2
+ ld1 {v16.16b, v17.16b, v18.16b, v19.16b}, [x0]
+ uaddw v0.8h, v0.8h, v4.8b
+ uaddw v1.8h, v1.8h, v5.8b
+ uaddw v2.8h, v2.8h, v6.8b
+ ld1 {v4.8b}, [x1], x2
+ uaddw v3.8h, v3.8h, v7.8b
+ ld1 {v5.8b}, [x1], x2
+ sqxtun v0.8b, v0.8h
+ ld1 {v6.8b}, [x1], x2
+ sqxtun v1.8b, v1.8h
+ ld1 {v7.8b}, [x1]
+ sqxtun v2.8b, v2.8h
+ sqxtun v3.8b, v3.8h
+ uaddw v4.8h, v16.8h, v4.8b
+ st1 {v0.8b}, [x3], x2
+ uaddw v0.8h, v17.8h, v5.8b
+ st1 {v1.8b}, [x3], x2
+ uaddw v1.8h, v18.8h, v6.8b
+ st1 {v2.8b}, [x3], x2
+ uaddw v2.8h, v19.8h, v7.8b
+ sqxtun v4.8b, v4.8h
+ sqxtun v0.8b, v0.8h
+ st1 {v3.8b}, [x3], x2
+ sqxtun v1.8b, v1.8h
+ sqxtun v2.8b, v2.8h
+ st1 {v4.8b}, [x3], x2
+ st1 {v0.8b}, [x3], x2
+ st1 {v1.8b}, [x3], x2
+ st1 {v2.8b}, [x3]
+ ret
+endfunc