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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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