| /* |
| * 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" |
| #include "libavutil/mips/asmdefs.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" |
| |
| PTR_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;*/ |
| PTR_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 |
| } |
