In 1996 I started work on a 2D rendering engine in ARM assembler which did alpha-blending and vector antialiasing. Substantial parts of it were later rewritten in C, but the core pixel-blitting loops are still there in ARM as far as I know. It shipped hundreds of millions of units and was at one point present on the majority of mobile phones manufactured in Japan, Korea and Taiwan in the mid 2000s. It is still going, and some software products are still being shipped today which contain that code.