Approximate Square Root Operations on C674x

Hi,

The C674x datasheet says

Supports up to Two Floating Point (SP or DP) Approximate Reciprocal or Square Root Operations Per Cycle

If I want to use Approximate Square Root Operations, which instruction should I use? I can only find Square-Root Reciprocal Approximation (e.g. RSQRSP) in the instruction set.

Thanks

over 16 years ago

0 Mariana over 16 years ago

TI__Mastermind 24340 points

Hi Yan,

I think it means that you can do:

Approximate Reciprocal - Floating-Point Reciprocal Approximation (RCPSP or RCPDP) - pages 256 to 259 of document below.

Approximate Reciprocal or Square Root Operations - Floating-Point Square-Root Reciprocal Approximation (RSQRDP or RSQRSP) – pages 260 to 262.

http://focus.ti.com/general/docs/techdocsabstract.tsp?abstractName=spru733a

Let me search a little more to make sure.

0 Mariana over 16 years ago in reply to Mariana

TI__Mastermind 24340 points

Hi Yan,

I confirmed that my previous explanation is correct.

You can also use the Fast RTS that has reciprocal and square root:

http://focus.ti.com/docs/toolsw/folders/print/sprc060.html

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Approximate Square Root Operations on C674x