Cordic
01-28-2014, 04:11 PM
Post: #1
 Tugdual Senior Member Posts: 755 Joined: Dec 2013
Cordic
Does anybdoy knows if the Prime still relies on Cordic or uses a math coprocessor (which itself may as well rely on cordic...)?
01-28-2014, 04:23 PM
Post: #2
 Tim Wessman Senior Member Posts: 2,270 Joined: Dec 2013
RE: Cordic
The numeric math library is essentially the same BCD math library from the 48 series. So yes.

The CAS however uses binary and I don't know exactly what Bernard does there.

TW

Although I work for the HP calculator group, the views and opinions I post here are my own.
01-28-2014, 05:39 PM
Post: #3
 debrouxl Member Posts: 257 Joined: Dec 2013
RE: Cordic
The ancient ARM9 processor series doesn't have floating-point acceleration like, say, the Cortex-A series does.
01-28-2014, 05:41 PM
Post: #4
 parisse Senior Member Posts: 1,176 Joined: Dec 2013
RE: Cordic
Floating point arithmetic in the CAS is using the double format representation (truncated to 48 bits mantissa) and the standard libm/libstdc++ functions (except for a few special functions).
01-28-2014, 08:43 PM
Post: #5
 Tugdual Senior Member Posts: 755 Joined: Dec 2013
RE: Cordic
Thank you all for quick and detailed answers!
01-29-2014, 06:36 AM
Post: #6
 cyrille de brĂ©bisson Senior Member Posts: 1,047 Joined: Dec 2013
RE: Cordic
Hello

(01-28-2014 05:39 PM)debrouxl Wrote:  The ancient ARM9 processor series doesn't have floating-point acceleration like, say, the Cortex-A series does.

Incorrect, some ARM9 do, and some Cortex-A do not...
but in our case, we do not...

However, the ARM FPU does not integrate sin/cos anyway... so the conversation is moot :-) ARM FPU only have +, -, *, / and sqrt...

Cyrille
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