dbd12523a4
Ported from arm NEON and added vector_dmul_scalar. Functions between 1.5 and 5 times faster than the C implementations using Apple's clang-503.0.19 on A7.
203 lines
7.7 KiB
ArmAsm
203 lines
7.7 KiB
ArmAsm
/*
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* ARM NEON optimised Float DSP functions
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* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
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* Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "asm.S"
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function ff_vector_fmul_neon, export=1
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1: subs w3, w3, #16
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ld1 {v0.4S, v1.4S}, [x1], #32
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ld1 {v2.4S, v3.4S}, [x1], #32
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ld1 {v4.4S, v5.4S}, [x2], #32
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ld1 {v6.4S, v7.4S}, [x2], #32
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fmul v16.4S, v0.4S, v4.4S
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fmul v17.4S, v1.4S, v5.4S
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fmul v18.4S, v2.4S, v6.4S
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fmul v19.4S, v3.4S, v7.4S
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st1 {v16.4S, v17.4S}, [x0], #32
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st1 {v18.4S, v19.4S}, [x0], #32
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b.ne 1b
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ret
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endfunc
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function ff_vector_fmac_scalar_neon, export=1
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mov x3, #-32
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1: subs w2, w2, #16
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ld1 {v16.4S, v17.4S}, [x0], #32
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ld1 {v18.4S, v19.4S}, [x0], x3
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ld1 {v4.4S, v5.4S}, [x1], #32
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ld1 {v6.4S, v7.4S}, [x1], #32
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fmla v16.4S, v4.4S, v0.S[0]
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fmla v17.4S, v5.4S, v0.S[0]
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fmla v18.4S, v6.4S, v0.S[0]
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fmla v19.4S, v7.4S, v0.S[0]
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st1 {v16.4S, v17.4S}, [x0], #32
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st1 {v18.4S, v19.4S}, [x0], #32
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b.ne 1b
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ret
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endfunc
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function ff_vector_fmul_scalar_neon, export=1
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mov w4, #15
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bics w3, w2, w4
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dup v16.4S, v0.S[0]
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b.eq 3f
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ld1 {v0.4S, v1.4S}, [x1], #32
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1: subs w3, w3, #16
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fmul v0.4S, v0.4S, v16.4S
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ld1 {v2.4S, v3.4S}, [x1], #32
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fmul v1.4S, v1.4S, v16.4S
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fmul v2.4S, v2.4S, v16.4S
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st1 {v0.4S, v1.4S}, [x0], #32
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fmul v3.4S, v3.4S, v16.4S
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b.eq 2f
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ld1 {v0.4S, v1.4S}, [x1], #32
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st1 {v2.4S, v3.4S}, [x0], #32
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b 1b
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2: ands w2, w2, #15
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st1 {v2.4S, v3.4S}, [x0], #32
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b.eq 4f
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3: ld1 {v0.4S}, [x1], #16
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fmul v0.4S, v0.4S, v16.4S
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st1 {v0.4S}, [x0], #16
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subs w2, w2, #4
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b.gt 3b
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4: ret
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endfunc
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function ff_vector_dmul_scalar_neon, export=1
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dup v16.2D, v0.D[0]
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ld1 {v0.2D, v1.2D}, [x1], #32
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1: subs w2, w2, #8
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fmul v0.2D, v0.2D, v16.2D
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ld1 {v2.2D, v3.2D}, [x1], #32
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fmul v1.2D, v1.2D, v16.2D
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fmul v2.2D, v2.2D, v16.2D
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st1 {v0.2D, v1.2D}, [x0], #32
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fmul v3.2D, v3.2D, v16.2D
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ld1 {v0.2D, v1.2D}, [x1], #32
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st1 {v2.2D, v3.2D}, [x0], #32
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b.gt 1b
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ret
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endfunc
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function ff_vector_fmul_window_neon, export=1
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sxtw x4, w4 // len
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sub x2, x2, #8
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sub x5, x4, #2
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add x2, x2, x5, lsl #2 // src1 + 4 * (len - 4)
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add x6, x3, x5, lsl #3 // win + 8 * (len - 2)
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add x5, x0, x5, lsl #3 // dst + 8 * (len - 2)
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mov x7, #-16
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ld1 {v0.4S}, [x1], #16 // s0
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ld1 {v2.4S}, [x3], #16 // wi
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ld1 {v1.4S}, [x2], x7 // s1
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1: ld1 {v3.4S}, [x6], x7 // wj
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subs x4, x4, #4
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fmul v17.4S, v0.4S, v2.4S // s0 * wi
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rev64 v4.4S, v1.4S
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rev64 v5.4S, v3.4S
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rev64 v17.4S, v17.4S
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ext v4.16B, v4.16B, v4.16B, #8 // s1_r
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ext v5.16B, v5.16B, v5.16B, #8 // wj_r
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ext v17.16B, v17.16B, v17.16B, #8 // (s0 * wi)_rev
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fmul v16.4S, v0.4S, v5.4S // s0 * wj_r
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fmla v17.4S, v1.4S, v3.4S // (s0 * wi)_rev + s1 * wj
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b.eq 2f
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ld1 {v0.4S}, [x1], #16
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fmls v16.4S, v4.4S, v2.4S // s0 * wj_r - s1_r * wi
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st1 {v17.4S}, [x5], x7
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ld1 {v2.4S}, [x3], #16
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ld1 {v1.4S}, [x2], x7
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st1 {v16.4S}, [x0], #16
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b 1b
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2:
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fmls v16.4S, v4.4S, v2.4S // s0 * wj_r - s1_r * wi
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st1 {v17.4S}, [x5], x7
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st1 {v16.4S}, [x0], #16
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ret
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endfunc
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function ff_vector_fmul_add_neon, export=1
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ld1 {v0.4S, v1.4S}, [x1], #32
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ld1 {v2.4S, v3.4S}, [x2], #32
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ld1 {v4.4S, v5.4S}, [x3], #32
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1: subs w4, w4, #8
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fmla v4.4S, v0.4S, v2.4S
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fmla v5.4S, v1.4S, v3.4S
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b.eq 2f
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ld1 {v0.4S, v1.4S}, [x1], #32
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ld1 {v2.4S, v3.4S}, [x2], #32
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st1 {v4.4S, v5.4S}, [x0], #32
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ld1 {v4.4S, v5.4S}, [x3], #32
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b 1b
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2: st1 {v4.4S, v5.4S}, [x0], #32
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ret
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endfunc
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function ff_vector_fmul_reverse_neon, export=1
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sxtw x3, w3
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add x2, x2, x3, lsl #2
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sub x2, x2, #32
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mov x4, #-32
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ld1 {v2.4S, v3.4S}, [x2], x4
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ld1 {v0.4S, v1.4S}, [x1], #32
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1: subs x3, x3, #8
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rev64 v3.4S, v3.4S
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rev64 v2.4S, v2.4S
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ext v3.16B, v3.16B, v3.16B, #8
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ext v2.16B, v2.16B, v2.16B, #8
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fmul v16.4S, v0.4S, v3.4S
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fmul v17.4S, v1.4S, v2.4S
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b.eq 2f
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ld1 {v2.4S, v3.4S}, [x2], x4
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ld1 {v0.4S, v1.4S}, [x1], #32
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st1 {v16.4S, v17.4S}, [x0], #32
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b 1b
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2: st1 {v16.4S, v17.4S}, [x0], #32
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ret
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endfunc
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function ff_butterflies_float_neon, export=1
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1: ld1 {v0.4S}, [x0]
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ld1 {v1.4S}, [x1]
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subs w2, w2, #4
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fsub v2.4S, v0.4S, v1.4S
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fadd v3.4S, v0.4S, v1.4S
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st1 {v2.4S}, [x1], #16
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st1 {v3.4S}, [x0], #16
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b.gt 1b
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ret
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endfunc
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function ff_scalarproduct_float_neon, export=1
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movi v2.4S, #0
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1: ld1 {v0.4S}, [x0], #16
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ld1 {v1.4S}, [x1], #16
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subs w2, w2, #4
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fmla v2.4S, v0.4S, v1.4S
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b.gt 1b
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faddp v0.4S, v2.4S, v2.4S
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faddp s0, v0.2S
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ret
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endfunc
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