Raspberry Pi 4 (BCM2711) has a GPU named VideoCore VI QPU in its SoC. The basic instruction set (add/mul ALU dual issue, three delay slots et al.) remains the same as VideoCore IV QPU of Raspberry Pi Zero/1/2/3, and some units now perform differently. For instance, the TMU can now write to memory in addition to read, and it seems that the VPM DMA is no longer available. Theoretical peak performanc