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+/*
+ * ARM NEON optimised Float DSP functions
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ * 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 "config.h"
+#include "asm.S"
+
+function ff_vector_fmul_neon, export=1
+1: subs w3, w3, #16
+ ld1 {v0.4S, v1.4S}, [x1], #32
+ ld1 {v2.4S, v3.4S}, [x1], #32
+ ld1 {v4.4S, v5.4S}, [x2], #32
+ ld1 {v6.4S, v7.4S}, [x2], #32
+ fmul v16.4S, v0.4S, v4.4S
+ fmul v17.4S, v1.4S, v5.4S
+ fmul v18.4S, v2.4S, v6.4S
+ fmul v19.4S, v3.4S, v7.4S
+ st1 {v16.4S, v17.4S}, [x0], #32
+ st1 {v18.4S, v19.4S}, [x0], #32
+ b.ne 1b
+ ret
+endfunc
+
+function ff_vector_fmac_scalar_neon, export=1
+ mov x3, #-32
+1: subs w2, w2, #16
+ ld1 {v16.4S, v17.4S}, [x0], #32
+ ld1 {v18.4S, v19.4S}, [x0], x3
+ ld1 {v4.4S, v5.4S}, [x1], #32
+ ld1 {v6.4S, v7.4S}, [x1], #32
+ fmla v16.4S, v4.4S, v0.S[0]
+ fmla v17.4S, v5.4S, v0.S[0]
+ fmla v18.4S, v6.4S, v0.S[0]
+ fmla v19.4S, v7.4S, v0.S[0]
+ st1 {v16.4S, v17.4S}, [x0], #32
+ st1 {v18.4S, v19.4S}, [x0], #32
+ b.ne 1b
+ ret
+endfunc
+
+function ff_vector_fmul_scalar_neon, export=1
+ mov w4, #15
+ bics w3, w2, w4
+ dup v16.4S, v0.S[0]
+ b.eq 3f
+ ld1 {v0.4S, v1.4S}, [x1], #32
+1: subs w3, w3, #16
+ fmul v0.4S, v0.4S, v16.4S
+ ld1 {v2.4S, v3.4S}, [x1], #32
+ fmul v1.4S, v1.4S, v16.4S
+ fmul v2.4S, v2.4S, v16.4S
+ st1 {v0.4S, v1.4S}, [x0], #32
+ fmul v3.4S, v3.4S, v16.4S
+ b.eq 2f
+ ld1 {v0.4S, v1.4S}, [x1], #32
+ st1 {v2.4S, v3.4S}, [x0], #32
+ b 1b
+2: ands w2, w2, #15
+ st1 {v2.4S, v3.4S}, [x0], #32
+ b.eq 4f
+3: ld1 {v0.4S}, [x1], #16
+ fmul v0.4S, v0.4S, v16.4S
+ st1 {v0.4S}, [x0], #16
+ subs w2, w2, #4
+ b.gt 3b
+4: ret
+endfunc
+
+function ff_vector_dmul_scalar_neon, export=1
+ dup v16.2D, v0.D[0]
+ ld1 {v0.2D, v1.2D}, [x1], #32
+1: subs w2, w2, #8
+ fmul v0.2D, v0.2D, v16.2D
+ ld1 {v2.2D, v3.2D}, [x1], #32
+ fmul v1.2D, v1.2D, v16.2D
+ fmul v2.2D, v2.2D, v16.2D
+ st1 {v0.2D, v1.2D}, [x0], #32
+ fmul v3.2D, v3.2D, v16.2D
+ ld1 {v0.2D, v1.2D}, [x1], #32
+ st1 {v2.2D, v3.2D}, [x0], #32
+ b.gt 1b
+ ret
+endfunc
+
+function ff_vector_fmul_window_neon, export=1
+ sxtw x4, w4 // len
+ sub x2, x2, #8
+ sub x5, x4, #2
+ add x2, x2, x5, lsl #2 // src1 + 4 * (len - 4)
+ add x6, x3, x5, lsl #3 // win + 8 * (len - 2)
+ add x5, x0, x5, lsl #3 // dst + 8 * (len - 2)
+ mov x7, #-16
+ ld1 {v0.4S}, [x1], #16 // s0
+ ld1 {v2.4S}, [x3], #16 // wi
+ ld1 {v1.4S}, [x2], x7 // s1
+1: ld1 {v3.4S}, [x6], x7 // wj
+ subs x4, x4, #4
+ fmul v17.4S, v0.4S, v2.4S // s0 * wi
+ rev64 v4.4S, v1.4S
+ rev64 v5.4S, v3.4S
+ rev64 v17.4S, v17.4S
+ ext v4.16B, v4.16B, v4.16B, #8 // s1_r
+ ext v5.16B, v5.16B, v5.16B, #8 // wj_r
+ ext v17.16B, v17.16B, v17.16B, #8 // (s0 * wi)_rev
+ fmul v16.4S, v0.4S, v5.4S // s0 * wj_r
+ fmla v17.4S, v1.4S, v3.4S // (s0 * wi)_rev + s1 * wj
+ b.eq 2f
+ ld1 {v0.4S}, [x1], #16
+ fmls v16.4S, v4.4S, v2.4S // s0 * wj_r - s1_r * wi
+ st1 {v17.4S}, [x5], x7
+ ld1 {v2.4S}, [x3], #16
+ ld1 {v1.4S}, [x2], x7
+ st1 {v16.4S}, [x0], #16
+ b 1b
+2:
+ fmls v16.4S, v4.4S, v2.4S // s0 * wj_r - s1_r * wi
+ st1 {v17.4S}, [x5], x7
+ st1 {v16.4S}, [x0], #16
+ ret
+endfunc
+
+function ff_vector_fmul_add_neon, export=1
+ ld1 {v0.4S, v1.4S}, [x1], #32
+ ld1 {v2.4S, v3.4S}, [x2], #32
+ ld1 {v4.4S, v5.4S}, [x3], #32
+1: subs w4, w4, #8
+ fmla v4.4S, v0.4S, v2.4S
+ fmla v5.4S, v1.4S, v3.4S
+ b.eq 2f
+ ld1 {v0.4S, v1.4S}, [x1], #32
+ ld1 {v2.4S, v3.4S}, [x2], #32
+ st1 {v4.4S, v5.4S}, [x0], #32
+ ld1 {v4.4S, v5.4S}, [x3], #32
+ b 1b
+2: st1 {v4.4S, v5.4S}, [x0], #32
+ ret
+endfunc
+
+function ff_vector_fmul_reverse_neon, export=1
+ sxtw x3, w3
+ add x2, x2, x3, lsl #2
+ sub x2, x2, #32
+ mov x4, #-32
+ ld1 {v2.4S, v3.4S}, [x2], x4
+ ld1 {v0.4S, v1.4S}, [x1], #32
+1: subs x3, x3, #8
+ rev64 v3.4S, v3.4S
+ rev64 v2.4S, v2.4S
+ ext v3.16B, v3.16B, v3.16B, #8
+ ext v2.16B, v2.16B, v2.16B, #8
+ fmul v16.4S, v0.4S, v3.4S
+ fmul v17.4S, v1.4S, v2.4S
+ b.eq 2f
+ ld1 {v2.4S, v3.4S}, [x2], x4
+ ld1 {v0.4S, v1.4S}, [x1], #32
+ st1 {v16.4S, v17.4S}, [x0], #32
+ b 1b
+2: st1 {v16.4S, v17.4S}, [x0], #32
+ ret
+endfunc
+
+function ff_butterflies_float_neon, export=1
+1: ld1 {v0.4S}, [x0]
+ ld1 {v1.4S}, [x1]
+ subs w2, w2, #4
+ fsub v2.4S, v0.4S, v1.4S
+ fadd v3.4S, v0.4S, v1.4S
+ st1 {v2.4S}, [x1], #16
+ st1 {v3.4S}, [x0], #16
+ b.gt 1b
+ ret
+endfunc
+
+function ff_scalarproduct_float_neon, export=1
+ movi v2.4S, #0
+1: ld1 {v0.4S}, [x0], #16
+ ld1 {v1.4S}, [x1], #16
+ subs w2, w2, #4
+ fmla v2.4S, v0.4S, v1.4S
+ b.gt 1b
+ faddp v0.4S, v2.4S, v2.4S
+ faddp s0, v0.2S
+ ret
+endfunc
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