diff options
Diffstat (limited to 'libavcodec/x86/svq1enc.c')
-rw-r--r-- | libavcodec/x86/svq1enc.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/libavcodec/x86/svq1enc.c b/libavcodec/x86/svq1enc.c new file mode 100644 index 0000000000..02b0a84b8c --- /dev/null +++ b/libavcodec/x86/svq1enc.c @@ -0,0 +1,73 @@ +/* + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" +#include "libavutil/attributes.h" +#include "libavutil/cpu.h" +#include "libavutil/x86/asm.h" +#include "libavutil/x86/cpu.h" +#include "libavcodec/svq1enc.h" + +#if HAVE_INLINE_ASM + +static int ssd_int8_vs_int16_mmx(const int8_t *pix1, const int16_t *pix2, + int size) +{ + int sum; + x86_reg i = size; + + __asm__ volatile ( + "pxor %%mm4, %%mm4 \n" + "1: \n" + "sub $8, %0 \n" + "movq (%2, %0), %%mm2 \n" + "movq (%3, %0, 2), %%mm0 \n" + "movq 8(%3, %0, 2), %%mm1 \n" + "punpckhbw %%mm2, %%mm3 \n" + "punpcklbw %%mm2, %%mm2 \n" + "psraw $8, %%mm3 \n" + "psraw $8, %%mm2 \n" + "psubw %%mm3, %%mm1 \n" + "psubw %%mm2, %%mm0 \n" + "pmaddwd %%mm1, %%mm1 \n" + "pmaddwd %%mm0, %%mm0 \n" + "paddd %%mm1, %%mm4 \n" + "paddd %%mm0, %%mm4 \n" + "jg 1b \n" + "movq %%mm4, %%mm3 \n" + "psrlq $32, %%mm3 \n" + "paddd %%mm3, %%mm4 \n" + "movd %%mm4, %1 \n" + : "+r" (i), "=r" (sum) + : "r" (pix1), "r" (pix2)); + + return sum; +} + +#endif /* HAVE_INLINE_ASM */ + +av_cold void ff_svq1enc_init_x86(SVQ1EncContext *c) +{ +#if HAVE_INLINE_ASM + int cpu_flags = av_get_cpu_flags(); + + if (INLINE_MMX(cpu_flags)) { + c->ssd_int8_vs_int16 = ssd_int8_vs_int16_mmx; + } +#endif /* HAVE_INLINE_ASM */ +} |