[PATCH, ARM] Add -mcpu=cortex-m4f

[Jie Zhang]

On 09/13/2010 11:34 PM, Matthew Gretton-Dann wrote:
> Jie,
>
> On Sat, 2010-09-11 at 03:13 +0800, Jie Zhang wrote:
>> This patch adds -mcpu=cortex-m4f to GAS. It also documents
>> -mcpu=cortex-m4, which is missing. OK?
>
> Despite what some documents say there is no such processor as
> Cortex-M4F.  They are all Cortex-M4 with or without an FPU.  This is
> similar to the Cortex-A8/A9 naming schemes.
>
In "Cortex -M4 Technical Reference Manual" (Revision r0p1), page 1-2

[quote]
The Cortex-M4 processor is a low-power processor that features low gate 
count, low interrupt latency, and low-cost debug. The Cortex-M4F is a 
processor with the same capability as the Cortex-M4 processor, and 
includes floating point arithmetic functionality (see Chapter 7
Floating Point Unit). Both processors are intended for deeply embedded 
applications that require fast interrupt response features.
[/quote]


-- 
Jie Zhang
CodeSourcery