Implemented filter_avg for PowerPC VXS
This commit is contained in:
Vadim Barkov
parent
6ddcd33daa
commit
c43aaa8b20
@ -100,6 +100,15 @@ void png_read_filter_row_up_vsx(png_row_infop row_info, png_bytep row,
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#define VEC_SELECT4_3 (vector unsigned char){16,16,16,16,16,16,16,16,16,16,16,16,9,10,11,16}
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#define VEC_AVG_SELECT1_4 (vector unsigned char){16,16,16,16, 4, 5, 6, 7,16,16,16,16,16,16,16,16}
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#define VEC_AVG_SELECT2_4 (vector unsigned char){16,16,16,16,16,16,16,16, 8, 9,10,11,16,16,16,16}
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#define VEC_AVG_SELECT3_4 (vector unsigned char){16,16,16,16,16,16,16,16,16,16,16,16,12,13,14,15}
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#define VEC_AVG_SELECT1_3 (vector unsigned char){16,16,16, 3, 4, 5,16,16,16,16,16,16,16,16,16,16}
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#define VEC_AVG_SELECT2_3 (vector unsigned char){16,16,16,16,16,16, 6, 7, 8,16,16,16,16,16,16,16}
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#define VEC_AVG_SELECT3_3 (vector unsigned char){16,16,16,16,16,16,16,16,16, 9,10,11,16,16,16,16}
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#define VEC_AVG_SELECT4_3 (vector unsigned char){16,16,16,16,16,16,16,16,16,16,16,16,12,13,14,16}
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void png_read_filter_row_sub4_vsx(png_row_infop row_info, png_bytep row,
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png_const_bytep prev_row)
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{
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@ -224,53 +233,187 @@ void png_read_filter_row_sub3_vsx(png_row_infop row_info, png_bytep row,
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void png_read_filter_row_avg4_vsx(png_row_infop row_info, png_bytep row,
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png_const_bytep prev_row)
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{
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png_size_t i;
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png_bytep rp = row;
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png_const_bytep pp = prev_row;
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unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
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png_size_t istop = row_info->rowbytes - bpp;
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const unsigned int bpp = 4;
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png_size_t i;
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for (i = 0; i < bpp; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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((int)(*pp++) / 2 )) & 0xff);
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png_size_t unaligned_top = 16 - ((png_size_t)row % 16);
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png_size_t istop = row_info->rowbytes - unaligned_top;
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rp++;
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}
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png_bytep rp = row;
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png_const_bytep pp = prev_row;
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for (i = 0; i < istop; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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vector unsigned char rp_vec;
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vector unsigned char pp_vec;
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vector unsigned char pp_part_vec;
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vector unsigned char rp_part_vec;
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vector unsigned char avg_vec;
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vector unsigned char zero_vec = {0};
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rp++;
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}
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for (i = 0; i < bpp; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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((int)(*pp++) / 2 )) & 0xff);
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rp++;
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}
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/* Altivec operations require 16-byte aligned data
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* but input can be unaligned. So we calculate
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* unaligned part as usual.
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*/
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for (i = bpp; i < unaligned_top; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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/* Using SIMD while we can */
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while( istop >= 16 )
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{
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for(i=0;i < bpp ; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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rp -= bpp;
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pp -= bpp;
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vec_ld_unaligned(pp_vec,pp);
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rp_vec = vec_ld(0,rp);
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rp_part_vec = vec_perm(rp_vec,zero_vec,VEC_SELECT1_4);
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pp_part_vec = vec_perm(pp_vec,zero_vec,VEC_AVG_SELECT1_4);
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avg_vec = vec_avg(rp_part_vec,pp_part_vec);
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avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
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rp_vec = vec_add(rp_vec,avg_vec);
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rp_part_vec = vec_perm(rp_vec,zero_vec,VEC_SELECT2_4);
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pp_part_vec = vec_perm(pp_vec,zero_vec,VEC_AVG_SELECT2_4);
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avg_vec = vec_avg(rp_part_vec,pp_part_vec);
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avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
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rp_vec = vec_add(rp_vec,avg_vec);
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rp_part_vec = vec_perm(rp_vec,zero_vec,VEC_SELECT3_4);
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pp_part_vec = vec_perm(pp_vec,zero_vec,VEC_AVG_SELECT3_4);
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avg_vec = vec_avg(rp_part_vec,pp_part_vec);
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avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
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rp_vec = vec_add(rp_vec,avg_vec);
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vec_st(rp_vec,0,rp);
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rp += 16;
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pp += 16;
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istop -= 16;
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}
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if(istop % 16 > 0)
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for (i = 0; i < istop % 16; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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}
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void png_read_filter_row_avg3_vsx(png_row_infop row_info, png_bytep row,
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png_const_bytep prev_row)
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{
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png_size_t i;
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png_bytep rp = row;
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png_const_bytep pp = prev_row;
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unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
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png_size_t istop = row_info->rowbytes - bpp;
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const unsigned int bpp = 3;
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png_size_t i;
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for (i = 0; i < bpp; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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((int)(*pp++) / 2 )) & 0xff);
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png_size_t unaligned_top = 16 - ((png_size_t)row % 16);
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png_size_t istop = row_info->rowbytes - unaligned_top;
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rp++;
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}
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png_bytep rp = row;
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png_const_bytep pp = prev_row;
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for (i = 0; i < istop; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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vector unsigned char rp_vec;
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vector unsigned char pp_vec;
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vector unsigned char pp_part_vec;
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vector unsigned char rp_part_vec;
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vector unsigned char avg_vec;
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vector unsigned char zero_vec = {0};
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for (i = 0; i < bpp; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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((int)(*pp++) / 2 )) & 0xff);
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rp++;
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}
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/* Altivec operations require 16-byte aligned data
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* but input can be unaligned. So we calculate
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* unaligned part as usual.
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*/
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for (i = bpp; i < unaligned_top; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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/* Using SIMD while we can */
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while( istop >= 16 )
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{
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for(i=0;i < bpp ; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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rp -= bpp;
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pp -= bpp;
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vec_ld_unaligned(pp_vec,pp);
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rp_vec = vec_ld(0,rp);
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rp_part_vec = vec_perm(rp_vec,zero_vec,VEC_SELECT1_3);
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pp_part_vec = vec_perm(pp_vec,zero_vec,VEC_AVG_SELECT1_3);
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avg_vec = vec_avg(rp_part_vec,pp_part_vec);
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avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
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rp_vec = vec_add(rp_vec,avg_vec);
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rp_part_vec = vec_perm(rp_vec,zero_vec,VEC_SELECT2_3);
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pp_part_vec = vec_perm(pp_vec,zero_vec,VEC_AVG_SELECT2_3);
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avg_vec = vec_avg(rp_part_vec,pp_part_vec);
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avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
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rp_vec = vec_add(rp_vec,avg_vec);
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rp_part_vec = vec_perm(rp_vec,zero_vec,VEC_SELECT3_3);
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pp_part_vec = vec_perm(pp_vec,zero_vec,VEC_AVG_SELECT3_3);
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avg_vec = vec_avg(rp_part_vec,pp_part_vec);
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avg_vec = vec_sub(avg_vec, vec_and(vec_xor(rp_part_vec,pp_part_vec),vec_splat_u8(1)));
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rp_vec = vec_add(rp_vec,avg_vec);
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vec_st(rp_vec,0,rp);
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rp += 16;
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pp += 16;
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istop -= 16;
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/* Since 16 % bpp = 16 % 3 = 1, last element of array must
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* be proceeded manually
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*/
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*(rp - 1) += ((int)(*(pp-1) + *(rp-1-bpp)) / 2 ) & 0xff;
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}
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if(istop % 16 > 0)
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for (i = 0; i < istop % 16; i++)
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{
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*rp = (png_byte)(((int)(*rp) +
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(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
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rp++;
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}
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rp++;
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}
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}
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void png_read_filter_row_paeth4_vsx(png_row_infop row_info,
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