codychchiang wrote:
有幾點疑惑:1.AP...(恕刪)
以目前情報看起來A6 偏向於cortex-A15架構,
因此最有可能的是,Apple向ARM購買cortex-A15架構的IP授權後自己重新修改設計,
理論上,要修改的話就不會把東西改爛,只會把東西改好,不然要拿出來讓人笑越改越爛?
其實以目前來說晶片改ARM改最大的非Qualcomm莫屬!一個cortex-A15改成的Krait竟然可以有異步核心(每顆core可以獨力調整時脈),高通是少數購買ARM完整授權的公司,所有ARM的設計圖都可以拿來暴改。
三星、nVidia、Apple、Intel(硬碟控制器之類的)...等,則是購買單一IP授權方式。
TypeZero.PTT wrote:
以目前情報看起來A6...(恕刪)
好像錯了
依照anandtech的說法
apple的license跟qualcomm的類似
引用自anandtech
For a long time it's been known that Apple has both types of licenses. Qualcomm is in a similar situation; it licenses individual ARM cores for use in some SoCs (e.g. the MSM8x25/Snapdragon S4 Play uses ARM Cortex A5s) as well as licenses the ARM instruction set for use by its own processors (e.g. Scorpion/Krait implement in the ARMv7 ISA).
TypeZero.PTT wrote:
]你可能會錯元文意思...(恕刪)
不是架構很像啦 XD
而是上下文是指apple並非買單一授權的IP
除非我又眼花了 XD
再補上anandtech上段
There are two types of ARM licensees: those who license a specific processor core (e.g. Cortex A8, A9, A15), and those who license an ARM instruction set architecture for custom implementation (e.g. ARMv7 ISA).
http://browser.primatelabs.com/geekbench2/1041269
一樣是iphone5 分數怎麼差這麼多?
這台分數只有9百多?
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