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