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1 /*
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2 * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
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3 *
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4 * This file is part of FFmpeg.
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5 *
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6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
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8 * License as published by the Free Software Foundation; either
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9 * version 2.1 of the License, or (at your option) any later version.
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10 *
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11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Lesser General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Lesser General Public
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17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
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20
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21 #include "libavutil/arm/asm.S"
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22
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23 function ff_dca_lfe_fir_neon, export=1
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24 push {r4-r6,lr}
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25
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26 add r4, r0, r3, lsl #2 @ out2
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27 add r5, r2, #256*4-16 @ cf1
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28 sub r1, r1, #12
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29 cmp r3, #32
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30 ite eq
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31 moveq r6, #256/32
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32 movne r6, #256/64
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33 NOVFP vldr s0, [sp, #16] @ scale
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34 mov lr, #-16
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35 1:
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36 vmov.f32 q2, #0.0 @ v0
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37 vmov.f32 q3, #0.0 @ v1
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38 mov r12, r6
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39 2:
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40 vld1.32 {q8}, [r2,:128]! @ cf0
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41 vld1.32 {q9}, [r5,:128], lr @ cf1
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42 vld1.32 {q1}, [r1], lr @ in
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43 subs r12, r12, #4
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44 vrev64.32 q10, q8
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45 vmla.f32 q3, q1, q9
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46 vmla.f32 d4, d2, d21
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47 vmla.f32 d5, d3, d20
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48 bne 2b
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49
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50 add r1, r1, r6, lsl #2
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51 subs r3, r3, #1
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52 vadd.f32 d4, d4, d5
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53 vadd.f32 d6, d6, d7
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54 vpadd.f32 d4, d4, d6
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55 vmul.f32 d5, d4, d0[0]
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56 vst1.32 {d5[0]}, [r0,:32]!
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57 vst1.32 {d5[1]}, [r4,:32]!
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58 bne 1b
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59
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60 pop {r4-r6,pc}
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61 endfunc
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