tree b67f362366d10f2d737f24543ae85f2d60e567db
parent 435330494e7f5c7978f4417b7b53f8c8ceba0cd7
author Nigel Tao <nigeltao@golang.org> 1613301168 +1100
committer Nigel Tao <nigeltao@golang.org> 1613301168 +1100

Add std/png decoder.filter_3_distance_4_arm_neon

On a Raspberry Pi 4 (32-bit armv7l) with -march=native and -mfpu=neon
("native" means "armv8-a+crc+simd"):

wuffs_png_decode_filt_3_dist_4/clang9                      639MB/s ± 0%   906MB/s ± 0%  +41.71%  (p=0.008 n=5+5)
wuffs_png_decode_filt_3_dist_4/gcc8                        656MB/s ± 0%   714MB/s ± 0%   +8.89%  (p=0.008 n=5+5)