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78 lines
2.7 KiB
78 lines
2.7 KiB
/* |
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* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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/** |
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* ARM VFP optimized float to int16 conversion. |
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* Assume that len is a positive number and is multiple of 8, destination |
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* buffer is at least 4 bytes aligned (8 bytes alignment is better for |
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* performance), little endian byte sex |
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*/ |
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@ void ff_float_to_int16_vfp(int16_t *dst, const float *src, int len) |
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function ff_float_to_int16_vfp, export=1 |
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push {r4-r8,lr} |
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vpush {d8-d11} |
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vldmia r1!, {s16-s23} |
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vcvt.s32.f32 s0, s16 |
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vcvt.s32.f32 s1, s17 |
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vcvt.s32.f32 s2, s18 |
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vcvt.s32.f32 s3, s19 |
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vcvt.s32.f32 s4, s20 |
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vcvt.s32.f32 s5, s21 |
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vcvt.s32.f32 s6, s22 |
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vcvt.s32.f32 s7, s23 |
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1: |
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subs r2, r2, #8 |
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vmov r3, r4, s0, s1 |
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vmov r5, r6, s2, s3 |
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vmov r7, r8, s4, s5 |
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vmov ip, lr, s6, s7 |
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it gt |
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vldmiagt r1!, {s16-s23} |
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ssat r4, #16, r4 |
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ssat r3, #16, r3 |
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ssat r6, #16, r6 |
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ssat r5, #16, r5 |
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pkhbt r3, r3, r4, lsl #16 |
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pkhbt r4, r5, r6, lsl #16 |
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itttt gt |
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vcvtgt.s32.f32 s0, s16 |
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vcvtgt.s32.f32 s1, s17 |
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vcvtgt.s32.f32 s2, s18 |
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vcvtgt.s32.f32 s3, s19 |
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itttt gt |
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vcvtgt.s32.f32 s4, s20 |
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vcvtgt.s32.f32 s5, s21 |
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vcvtgt.s32.f32 s6, s22 |
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vcvtgt.s32.f32 s7, s23 |
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ssat r8, #16, r8 |
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ssat r7, #16, r7 |
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ssat lr, #16, lr |
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ssat ip, #16, ip |
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pkhbt r5, r7, r8, lsl #16 |
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pkhbt r6, ip, lr, lsl #16 |
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stmia r0!, {r3-r6} |
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bgt 1b |
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vpop {d8-d11} |
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pop {r4-r8,pc} |
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endfunc
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