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-rw-r--r--media/ffvpx/libavcodec/aarch64/mpegaudiodsp_neon.S225
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diff --git a/media/ffvpx/libavcodec/aarch64/mpegaudiodsp_neon.S b/media/ffvpx/libavcodec/aarch64/mpegaudiodsp_neon.S
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+/*
+ * Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net>
+ *
+ * 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"
+
+#define FRAC_BITS 23 // fractional bits for sb_samples and dct
+#define WFRAC_BITS 16 // fractional bits for window
+#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15)
+
+const tbl_rev128_s, align=4
+ .byte 12, 13, 14, 15
+ .byte 8, 9, 10, 11
+ .byte 4, 5, 6, 7
+ .byte 0, 1, 2, 3
+endconst
+
+.macro apply_window type, st
+function ff_mpadsp_apply_window_\type\()_neon, export=1
+ mov x7, x0
+ add x8, x0, #512<<2
+ ld1 {v0.4s,v1.4s,v2.4s,v3.4s}, [x7], #64
+ ld1 {v4.4s,v5.4s,v6.4s,v7.4s}, [x7], #64
+ st1 {v0.4s,v1.4s,v2.4s,v3.4s}, [x8], #64
+ st1 {v4.4s,v5.4s,v6.4s,v7.4s}, [x8], #64
+ movrel x15, tbl_rev128_s
+ ld1 {v27.4s}, [x15]
+.ifc \type, fixed
+ lsl x4, x4, #1
+.else
+ lsl x4, x4, #2
+.endif
+ add x10, x0, #45<<2
+ add x0, x0, #16<<2
+ add x1, x1, #16<<2
+ add x5, x3, x4, lsl #5
+ sub x5, x5, x4 // samples2
+ neg x13, x4 // -incr
+ mov x9, #64<<2
+.ifc \type, fixed
+ ld1r {v16.2s}, [x2] // dither_state
+ sxtl v16.2d, v16.2s
+ movi v29.2d, #0
+ movi v30.2d, #(1<<OUT_SHIFT)-1
+ trn1 v31.2d, v29.2d, v30.2d
+ trn2 v30.2d, v30.2d, v29.2d
+ trn1 v16.2d, v16.2d, v29.2d
+.else
+ movi v16.4s, #0
+ movi v28.4s, #0
+.endif
+ mov x14, #4
+1:
+ mov x8, x0
+ sub x7, x1, #3<<2
+ sub x6, x1, x14, lsl #4
+ add x7, x7, x14, lsl #4
+ add x11, x6, #(32)<<2 // w + 32
+ add x12, x7, #(32)<<2 // w2 + 32
+ mov x15, #8
+ movi v17.2d, #0
+ movi v18.2d, #0
+ movi v19.2d, #0
+2:
+ subs x15, x15, #1
+ ld1 {v0.4s}, [x8], x9
+ ld1 {v1.4s}, [x10], x9
+ ld1 {v2.4s}, [x6], x9
+ ld1 {v3.4s}, [x7], x9
+ tbl v6.16b, {v0.16b}, v27.16b
+ tbl v7.16b, {v1.16b}, v27.16b
+ ld1 {v4.4s}, [x11], x9
+ ld1 {v5.4s}, [x12], x9
+ MLA v16, v2, v0
+ MLA2 v17, v2, v0
+ MLS v18, v3, v6
+ MLS2 v19, v3, v6
+ MLS v16, v4, v7
+ MLS2 v17, v4, v7
+ MLS v18, v5, v1
+ MLS2 v19, v5, v1
+ b.gt 2b
+
+ cmp x14, #4
+ sub x10, x10, #64<<5 // 64 * 8 * sizeof(int32_t)
+
+.ifc \type, fixed
+ and v28.16b, v16.16b, v30.16b
+ ext v28.16b, v29.16b, v28.16b, #8
+
+ b.eq 4f
+ round_sample v19, 1, 1
+4:
+ round_sample v16, 1, 0
+ shrn v16.2s, v16.2d, #OUT_SHIFT
+ round_sample v19, 0, 0
+ shrn v19.2s, v19.2d, #OUT_SHIFT
+ round_sample v17, 0, 1
+ round_sample v18, 1, 1
+ round_sample v17, 1, 0
+ shrn2 v16.4s, v17.2d, #OUT_SHIFT
+ round_sample v18, 0, 0
+ shrn2 v19.4s, v18.2d, #OUT_SHIFT
+ sqxtn v16.4h, v16.4s
+ sqxtn v18.4h, v19.4s
+.else
+ ext v18.16b, v18.16b, v18.16b, #8
+.endif
+
+ st1 {v16.\st\()}[0], [x3], x4
+ b.eq 4f
+ st1 {v18.\st\()}[1], [x5], x13
+4:
+ st1 {v16.\st\()}[1], [x3], x4
+ st1 {v18.\st\()}[0], [x5], x13
+ st1 {v16.\st\()}[2], [x3], x4
+ st1 {v18.\st\()}[3], [x5], x13
+ st1 {v16.\st\()}[3], [x3], x4
+ st1 {v18.\st\()}[2], [x5], x13
+
+ mov v16.16b, v28.16b
+
+ subs x14, x14, #1
+ add x0, x0, #4<<2
+ sub x10, x10, #4<<2
+ b.gt 1b
+
+// computing samples[16]
+ add x6, x1, #32<<2
+ ld1 {v0.2s}, [x6], x9
+ ld1 {v1.2s}, [x0], x9
+.rept 3
+ ld1 {v2.2s}, [x6], x9
+ ld1 {v3.2s}, [x0], x9
+ MLS v16, v0, v1
+ ld1 {v0.2s}, [x6], x9
+ ld1 {v1.2s}, [x0], x9
+ MLS v16, v2, v3
+.endr
+ ld1 {v2.2s}, [x6], x9
+ ld1 {v3.2s}, [x0], x9
+ MLS v16, v0, v1
+ MLS v16, v2, v3
+
+.ifc \type, fixed
+ and v28.16b, v16.16b, v30.16b
+ shrn v20.2s, v16.2d, #OUT_SHIFT
+ xtn v28.2s, v28.2d
+ sqxtn v20.4h, v20.4s
+ st1 {v28.s}[0], [x2] // save dither_state
+ st1 {v20.h}[0], [x3]
+.else
+ st1 {v16.s}[0], [x3]
+.endif
+
+ ret
+endfunc
+.purgem round_sample
+.purgem MLA
+.purgem MLA2
+.purgem MLS
+.purgem MLS2
+.endm
+
+
+.macro round_sample r, idx, next
+ add \r\().2d, \r\().2d, v28.2d
+.if \idx == 0
+ and v28.16b, \r\().16b, v30.16b
+.else // \idx == 1
+ and v28.16b, \r\().16b, v31.16b
+.endif
+.if \idx != \next
+ .if \next == 0
+ ext v28.16b, v28.16b, v29.16b, #8
+ .else
+ ext v28.16b, v29.16b, v28.16b, #8
+ .endif
+.endif
+.endm
+.macro MLA d, s1, s2
+ smlal \d\().2d, \s1\().2s, \s2\().2s
+.endm
+.macro MLA2 d, s1, s2
+ smlal2 \d\().2d, \s1\().4s, \s2\().4s
+.endm
+.macro MLS d, s1, s2
+ smlsl \d\().2d, \s1\().2s, \s2\().2s
+.endm
+.macro MLS2 d, s1, s2
+ smlsl2 \d\().2d, \s1\().4s, \s2\().4s
+.endm
+apply_window fixed, h
+
+
+// nothing to do for round_sample and ML{A,S}2
+.macro round_sample r, idx, next
+.endm
+.macro MLA2 d, s1, s2
+.endm
+.macro MLS2 d, s1, s2
+.endm
+.macro MLA d, s1, s2
+ fmla \d\().4s, \s1\().4s, \s2\().4s
+.endm
+.macro MLS d, s1, s2
+ fmls \d\().4s, \s1\().4s, \s2\().4s
+.endm
+apply_window float, s