142 lines
6.6 KiB
C
142 lines
6.6 KiB
C
/*
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* Format Conversion Utils for MIPS
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*
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* Copyright (c) 2012
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* MIPS Technologies, Inc., California.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the MIPS Technologies, Inc., nor the names of is
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Author: Zoran Lukic (zoranl@mips.com)
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* Author: Nedeljko Babic (nbabic@mips.com)
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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 "libavcodec/avcodec.h"
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#include "libavcodec/fmtconvert.h"
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#include "libavutil/mips/asmdefs.h"
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#if HAVE_INLINE_ASM
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static void int32_to_float_fmul_scalar_mips(float *dst, const int *src,
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float mul, int len)
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{
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/*
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* variables used in inline assembler
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*/
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float temp1, temp3, temp5, temp7, temp9, temp11, temp13, temp15;
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int rpom1, rpom2, rpom11, rpom21, rpom12, rpom22, rpom13, rpom23;
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const int *src_end = src + len;
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/*
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* loop is 8 times unrolled in assembler in order to achieve better performance
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*/
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__asm__ volatile (
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"i32tf_lp%=: \n\t"
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"lw %[rpom11], 0(%[src]) \n\t"
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"lw %[rpom21], 4(%[src]) \n\t"
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"lw %[rpom1], 8(%[src]) \n\t"
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"lw %[rpom2], 12(%[src]) \n\t"
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"mtc1 %[rpom11], %[temp1] \n\t"
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"mtc1 %[rpom21], %[temp3] \n\t"
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"mtc1 %[rpom1], %[temp5] \n\t"
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"mtc1 %[rpom2], %[temp7] \n\t"
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"lw %[rpom13], 16(%[src]) \n\t"
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"lw %[rpom23], 20(%[src]) \n\t"
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"lw %[rpom12], 24(%[src]) \n\t"
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"lw %[rpom22], 28(%[src]) \n\t"
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"mtc1 %[rpom13], %[temp9] \n\t"
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"mtc1 %[rpom23], %[temp11] \n\t"
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"mtc1 %[rpom12], %[temp13] \n\t"
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"mtc1 %[rpom22], %[temp15] \n\t"
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PTR_ADDIU "%[src], 32 \n\t"
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"cvt.s.w %[temp1], %[temp1] \n\t"
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"cvt.s.w %[temp3], %[temp3] \n\t"
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"cvt.s.w %[temp5], %[temp5] \n\t"
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"cvt.s.w %[temp7], %[temp7] \n\t"
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"cvt.s.w %[temp9], %[temp9] \n\t"
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"cvt.s.w %[temp11], %[temp11] \n\t"
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"cvt.s.w %[temp13], %[temp13] \n\t"
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"cvt.s.w %[temp15], %[temp15] \n\t"
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"mul.s %[temp1], %[temp1], %[mul] \n\t"
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"mul.s %[temp3], %[temp3], %[mul] \n\t"
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"mul.s %[temp5], %[temp5], %[mul] \n\t"
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"mul.s %[temp7], %[temp7], %[mul] \n\t"
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"mul.s %[temp9], %[temp9], %[mul] \n\t"
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"mul.s %[temp11], %[temp11], %[mul] \n\t"
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"mul.s %[temp13], %[temp13], %[mul] \n\t"
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"mul.s %[temp15], %[temp15], %[mul] \n\t"
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"swc1 %[temp1], 0(%[dst]) \n\t" /*dst[i] = src[i] * mul; */
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"swc1 %[temp3], 4(%[dst]) \n\t" /*dst[i+1] = src[i+1] * mul;*/
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"swc1 %[temp5], 8(%[dst]) \n\t" /*dst[i+2] = src[i+2] * mul;*/
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"swc1 %[temp7], 12(%[dst]) \n\t" /*dst[i+3] = src[i+3] * mul;*/
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"swc1 %[temp9], 16(%[dst]) \n\t" /*dst[i+4] = src[i+4] * mul;*/
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"swc1 %[temp11], 20(%[dst]) \n\t" /*dst[i+5] = src[i+5] * mul;*/
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"swc1 %[temp13], 24(%[dst]) \n\t" /*dst[i+6] = src[i+6] * mul;*/
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"swc1 %[temp15], 28(%[dst]) \n\t" /*dst[i+7] = src[i+7] * mul;*/
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PTR_ADDIU "%[dst], 32 \n\t"
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"bne %[src], %[src_end], i32tf_lp%= \n\t"
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: [temp1]"=&f"(temp1), [temp11]"=&f"(temp11),
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[temp13]"=&f"(temp13), [temp15]"=&f"(temp15),
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[temp3]"=&f"(temp3), [temp5]"=&f"(temp5),
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[temp7]"=&f"(temp7), [temp9]"=&f"(temp9),
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[rpom1]"=&r"(rpom1), [rpom2]"=&r"(rpom2),
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[rpom11]"=&r"(rpom11), [rpom21]"=&r"(rpom21),
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[rpom12]"=&r"(rpom12), [rpom22]"=&r"(rpom22),
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[rpom13]"=&r"(rpom13), [rpom23]"=&r"(rpom23),
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[dst]"+r"(dst), [src]"+r"(src)
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: [mul]"f"(mul), [src_end]"r"(src_end)
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: "memory"
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);
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}
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#endif /* HAVE_INLINE_ASM */
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av_cold void ff_fmt_convert_init_mips(FmtConvertContext *c)
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{
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#if HAVE_INLINE_ASM
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c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_mips;
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#endif
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}
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