The T622 is a dual-core GPU and part of ARM's second generation of Mali
T6XX GPUs that offers a 50 percent improvement over other T6XX GPUs by
way of an implementation of Adaptive Scalable Texture Compression
(ATSC). This a lossy block-based system for the compression and
decompression of textures used in graphics rendering on the fly. The
energy efficiency is achieved by minimizing the amount of memory used to
ATSC was developed at ARM but has been donated
to the industry and adopted as a official extension for both OpenGL and
OpenGL ES by the Khronos Group.
The T622 supports OpenGL ES 3.0,
Google's Renderscript Compute and OpenCL 1.1 full profile making the
smallest GPU core able to support general purpose computing, according
to Jakub Lamik, product manager in ARM's media processing division.
also provide software development kit routines and libraries under
OpenCL where we can support use cases for GPGPU. With the pair of cores
including the CPU, ARM's SIMD [single instruction multiple data] engine
NEON and the dual-cored GPU the company is looking work its way towards
heterogeneous computing. "It's about running the right task on the right
core – or even about running the right part of task on the right core,"
said Rosinger. The GPGPU use cases being supported include vision
stablization, gesture and facial recognition," said Lamik.
premium feature set of the Cortex-A12 processor will enable new use
cases previously only limited to high-end devices and will allow the
mid-range mobile device segment to continue growing rapidly," said
Tzu-Mu Lin, senior vice president, at Via Technologies Inc. (Taipei,
Taiwan), in statement issued by ARM.
ARM seems to be positioninng the A12-T622 against the A57-T628, and the A53-T450 combinations for mobile SoCs.
To judge from the ARM-supplied slide the Cortex-A15's days for design-in in mobile device market have come and gone.
But does that means a flood of Cortex-A15 based devices are about to hit the market or the Cortex-A15 has come up empty?
You make me think that ARM may have discovered that A15 was to be skipped, hence the A12.
BTW, ARM in is better shape than Intel in case of getting out a somewhat bad model: no G$ invested in own factory allows to quickly divert ugly duck and build a new reference more in line with customers expectations.
Intel has been getting some design wins but performance doesn't matter much in mobile, at least not like how it did with PCs. In that case, there was tradeoff, but with mobile, if performance means too much power, there is a high possibility the performance would be skipped. Especially when performance is usually associated with two-handed applications.
ARM is losing Power battle to Intel. Intel is everywhere on new Android product announcements. Cortex-A15 is a whopper on power. 6W for Dual Core A15 is too much. ARM had to do something. Hence, A12! Lower Power on A12 means crappy performance. Intel will squish ARM
They are not die photos for three different SoCs. They are the same image.
But ARM indicates the sizes of the rectangles are indicative of relative die areas for A57-T628, A12-T622 and A53-T450 mobile SoCs
Are those die photos validated ? If so the die size could range from 11 mm sq. for the Premium market down to just 5 mm sq. for the Entry level version,or in terms of area just 20 %. Does ARM's royalty fee scale with area or with functional blocks ?
Die area as indicated in the top illustration.
Having said that each of the A9, A12 and A15 can be traded off for power, performance and area.
But in general the A15 offers greater performance but at greater area cost.
It is also possible that ARM is prepared to cut a deal on the royalty rate seeking a higher percentage of a higher priced SoC. However as typical royalty rates are about 2 percent of the SOC selling price that won't make a lot of difference.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.