Introduction
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– Compressed textures PVR-TC1, PVR-TC2, ETC1
– Programmable support for all YUV formats
• Resolution support:
– Frame buffer maximum size = 2048 x 2048
– Texture maximum size = 2048 x 2048
• Texture filtering:
– Bilinear, trilinear, anisotropic
– Independent minimum and maximum control
• Antialiasing:
– 4x multisampling
– Up to 16x full scene anti-aliasing
– Programmable sample positions
• Indexed primitive list support
– Bus mastered
• Programmable vertex DMA
• Render to texture:
– Including twiddled formats
– Auto MipMap generation
• Multiple on-chip render targets (MRT).
Note: Performance is limited when the on-chip memory is not available.
5.1.3 Universal Scalable Shader Engine (USSE) – Key Features
The USSE is the engine core of the POWERVR SGX architecture and supports a broad range of
instructions.
• Single programming model:
– Multithreaded with 16 simultaneous execution threads and up to 64 simultaneous data instances
– Zero-cost swapping in, and out, of threads
– Cached program execution model
– Dedicated pixel processing instructions
– Dedicated video encode/decode instructions
• SIMD execution unit supporting operations in:
– 32-bit IEEE float
– 2-way 16-bit fixed point
– 4-way 8-bit integer
– 32-bit bit-wise (logical only)
• Static and dynamic flow control:
– Subroutine calls
– Loops
– Conditional branches
– Zero-cost instruction predication
• Procedural geometry:
– Allows generation of primitives
– Effective geometry compression
– High-order surface support
• External data access:
– Permits reads from main memory using cache
180
Graphics Accelerator (SGX) SPRUH73H–October 2011–Revised April 2013
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