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