Search found 98 matches

by pauli
Wed Mar 07, 2018 2:17 am
Forum: Discuss!
Topic: 43S News
Replies: 898
Views: 221809

Re: 43S News

If the 34S is a guide, a couple of years to go :(

Pauli
by pauli
Mon Feb 19, 2018 7:50 am
Forum: DM42
Topic: My Calculator DM42 ist arrived ;-)
Replies: 63
Views: 27981

Re: My Calculator DM42 ist arrived ;-)

#1018 in Oz!


Pauli
by pauli
Sun Dec 31, 2017 9:27 am
Forum: Discuss!
Topic: DM42 wins over WP34S in accuracy..
Replies: 10
Views: 4517

Re: DM42 wins over WP34S in accuracy..

I willing to go way out on a limb here and state that if the Intel decimal library is more accurate than the 34S for any built in function, I'll attempt to fix the latter.


- Pauli
by pauli
Sun Dec 31, 2017 8:02 am
Forum: Discuss!
Topic: What is the internal accuracy for Pi in the DM-42?
Replies: 9
Views: 2924

Re: What is the internal accuracy for Pi in the DM-42?

Oh, it causes issues much sooner. When I tried the series sin(pi * 10^n), for n = 0, 1, 2, ..., I could see the error start to creep in at around n = 17. Wow, I'm surprised it is that soon. There must be something else going on for the error to appear this early -- possibly the change from binary t...
by pauli
Sun Dec 31, 2017 5:23 am
Forum: Discuss!
Topic: DM42 wins over WP34S in accuracy..
Replies: 10
Views: 4517

Re: DM42 wins over WP34S in accuracy..

We ran out of RAM on the 34S to hold a longer entry buffer plus the display is limited. I'm kind of surprised that ignorance of a purposeful limitation is claimed to be less accurate . We have several examples where the 34S is producing a correctly rounded result and the Intel decimal library isn't....
by pauli
Sun Dec 31, 2017 5:16 am
Forum: Discuss!
Topic: What is the internal accuracy for Pi in the DM-42?
Replies: 9
Views: 2924

Re: What is the internal accuracy for Pi in the DM-42?

Thomas Okken wrote:
Sat Dec 30, 2017 3:13 pm
The Intel library uses a 384-bit approximation of pi, equivalent to 115 decimal digits.
This might cause issues for huge arguments: e.g. sin(1.234E350).


Pauli
by pauli
Sat Dec 30, 2017 10:18 am
Forum: Discuss!
Topic: What is the internal accuracy for Pi in the DM-42?
Replies: 9
Views: 2924

Re: What is the internal accuracy for Pi in the DM-42?

Section 9 of the 2008 version of IEEE 754 says that the recommended functions should be correctly rounded not 1ULP accurate. These functions are optional in the sense that you can claim conformance without them but ...language standards should define, to be implemented according to this subclause, a...
by pauli
Tue Dec 19, 2017 8:38 am
Forum: DM42
Topic: A couple additional functions that would be cool to have
Replies: 33
Views: 11493

Re: A couple additional functions that would be cool to have

Yes, the 34S has RTN+1.

Wouldn't saving and restoring the stack to/from a register (as an array) be as useful?


Pauli
by pauli
Sun Oct 08, 2017 2:08 pm
Forum: Discuss!
Topic: Suddenly Login on each visit is required?
Replies: 27
Views: 7829

Re: Suddenly Login on each visit is required?

I'm on my third or fourth login today.
Each time I go away and come back, login time.


Pauli
by pauli
Wed Sep 13, 2017 9:21 am
Forum: Discuss!
Topic: DM42
Replies: 81
Views: 46430

Re: DM42

Vitasam wrote:
Wed Sep 13, 2017 8:27 am
How does Intel lib perform computations - in decimal or in binary format with conversions to decimal?
Mostly in binary but some in decimal. From what I've seen thus far (which isn't a lot), a binary approximation is used followed by a decimal refinement.


Pauli