search

image-rs / jpeg-decoder

JPEG decoder written in Rust
Apache License 2.0
149 stars 87 forks source link

Remove 10 bounds checks from `dequantize_and_idct_block_8x8` #216

Closed paolobarbolini closed 2 years ago

paolobarbolini commented 2 years ago

Removes bounds checks from the following lines:

https://github.com/image-rs/jpeg-decoder/blob/55a4a9a32b45b968694d3b656f4d9669a0ecbc03/src/idct.rs#L153-L160

https://github.com/image-rs/jpeg-decoder/blob/55a4a9a32b45b968694d3b656f4d9669a0ecbc03/src/idct.rs#L167-L168

and makes the code autovectorize

https://rust.godbolt.org/z/vP9svecsv