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/*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2013 Paul B Mahol
*
* 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 "libavutil/attributes.h"
#include "libavutil/x86/cpu.h"
#include "libavutil/x86/asm.h"
#include "libavfilter/vf_noise.h"
#if HAVE_INLINE_ASM
#if HAVE_6REGS
static void line_noise_avg_mmx(uint8_t *dst, const uint8_t *src,
int len, const int8_t * const *shift)
{
x86_reg mmx_len = len & (~7);
__asm__ volatile(
"mov %5, %%"FF_REG_a" \n\t"
".p2align 4 \n\t"
"1: \n\t"
"movq (%1, %%"FF_REG_a"), %%mm1 \n\t"
"movq (%0, %%"FF_REG_a"), %%mm0 \n\t"
"paddb (%2, %%"FF_REG_a"), %%mm1\n\t"
"paddb (%3, %%"FF_REG_a"), %%mm1\n\t"
"movq %%mm0, %%mm2 \n\t"
"movq %%mm1, %%mm3 \n\t"
"punpcklbw %%mm0, %%mm0 \n\t"
"punpckhbw %%mm2, %%mm2 \n\t"
"punpcklbw %%mm1, %%mm1 \n\t"
"punpckhbw %%mm3, %%mm3 \n\t"
"pmulhw %%mm0, %%mm1 \n\t"
"pmulhw %%mm2, %%mm3 \n\t"
"paddw %%mm1, %%mm1 \n\t"
"paddw %%mm3, %%mm3 \n\t"
"paddw %%mm0, %%mm1 \n\t"
"paddw %%mm2, %%mm3 \n\t"
"psrlw $8, %%mm1 \n\t"
"psrlw $8, %%mm3 \n\t"
"packuswb %%mm3, %%mm1 \n\t"
"movq %%mm1, (%4, %%"FF_REG_a") \n\t"
"add $8, %%"FF_REG_a" \n\t"
" js 1b \n\t"
:: "r" (src+mmx_len), "r" (shift[0]+mmx_len), "r" (shift[1]+mmx_len), "r" (shift[2]+mmx_len),
"r" (dst+mmx_len), "g" (-mmx_len)
: "%"FF_REG_a
);
if (mmx_len != len){
const int8_t *shift2[3] = { shift[0]+mmx_len, shift[1]+mmx_len, shift[2]+mmx_len };
ff_line_noise_avg_c(dst+mmx_len, src+mmx_len, len-mmx_len, shift2);
}
}
#endif /* HAVE_6REGS */
static void line_noise_mmxext(uint8_t *dst, const uint8_t *src,
const int8_t *noise, int len, int shift)
{
x86_reg mmx_len = len & (~7);
noise += shift;
__asm__ volatile(
"mov %3, %%"FF_REG_a" \n\t"
"pcmpeqb %%mm7, %%mm7 \n\t"
"psllw $15, %%mm7 \n\t"
"packsswb %%mm7, %%mm7 \n\t"
".p2align 4 \n\t"
"1: \n\t"
"movq (%0, %%"FF_REG_a"), %%mm0 \n\t"
"movq (%1, %%"FF_REG_a"), %%mm1 \n\t"
"pxor %%mm7, %%mm0 \n\t"
"paddsb %%mm1, %%mm0 \n\t"
"pxor %%mm7, %%mm0 \n\t"
"movntq %%mm0, (%2, %%"FF_REG_a") \n\t"
"add $8, %%"FF_REG_a" \n\t"
" js 1b \n\t"
:: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
: "%"FF_REG_a
);
if (mmx_len != len)
ff_line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
}
#endif /* HAVE_INLINE_ASM */
av_cold void ff_noise_init_x86(NoiseContext *n)
{
#if HAVE_INLINE_ASM
int cpu_flags = av_get_cpu_flags();
if (INLINE_MMX(cpu_flags)) {
#if HAVE_6REGS
n->line_noise_avg = line_noise_avg_mmx;
#endif
}
if (INLINE_MMXEXT(cpu_flags)) {
n->line_noise = line_noise_mmxext;
}
#endif
}
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