[42S] MANT Challenge
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01-23-2014, 12:07 PM
Post: #21
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RE: [42S] MANT Challenge | |||
01-23-2014, 03:15 PM
(This post was last modified: 01-23-2014 03:26 PM by Dieter.)
Post: #22
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RE: [42S] MANT Challenge
(01-23-2014 11:05 AM)Gerson W. Barbosa Wrote:(01-23-2014 11:02 AM)Werner Wrote: Hi Gerson!So does the HP-15C version for 1e-99... Yes, that's why my previous version handles these cases separately. However, this can be done more elegantly, even shorter and without an explicit constant (-499 resp. -99), so it should work on the 42s as well as on the 15C and many other HPs. Code: 01 ABS All input values are shifted by one magnitude towards 10, so that over-/underflow can not occur. Dieter |
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01-23-2014, 06:07 PM
Post: #23
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RE: [42S] MANT Challenge
(01-23-2014 03:15 PM)Dieter Wrote:Also, this preserves most of the stack (only T is lost). Very nice!(01-23-2014 11:05 AM)Gerson W. Barbosa Wrote: So does the HP-15C version for 1e-99... Gerson. |
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01-23-2014, 08:19 PM
Post: #24
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RE: [42S] MANT Challenge
(01-22-2014 09:40 AM)Werner Wrote: On the 41, you can use Synthetic Programming to come up with a short and efficient routine that returns the mantissa. The 42s problem has been solved, but I have to admit that my skills in Synthetic Programming are more than limited (or less than, if you prefer). Would you mind posting such a short and efficient synthetic MANT routine for the 41-series? Dieter |
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01-23-2014, 09:06 PM
(This post was last modified: 01-23-2014 09:19 PM by Werner.)
Post: #25
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RE: [42S] MANT Challenge
The MT routine as listed on page 339 of the PPC ROM manual, which is included in the MoHPC CDs/DVD:
29 LBL "MT" 30 CLA 31 STO M 32 ASTO M 33 INT 34 X!=0? 35 (Append x'00') 36 X=0? 37 (Append x'A0') 38 CLX 39 ST+ M 40 X<> M 41 RTN Btw your latest code is almost the same as the one I posted before ;-) 41CV†,42S,48GX,49G,DM42,DM41X,17BII,15CE,DM15L,12C,16CE |
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01-23-2014, 09:53 PM
Post: #26
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RE: [42S] MANT Challenge
(01-23-2014 09:06 PM)Werner Wrote: The MT routine as listed on page 339 of the PPC ROM manual, which is included in the MoHPC CDs/DVD: Thank you. (01-23-2014 09:06 PM)Werner Wrote: Btw your latest code is almost the same as the one I posted before ;-) Well, you will know that German proverb: Zwei Dumme, ein Gedanke! ;-)) Dieter |
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01-24-2014, 12:06 AM
Post: #27
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RE: [42S] MANT Challenge | |||
01-24-2014, 06:16 AM
Post: #28
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RE: [42S] MANT Challenge
It sounds better in English than in German ;-)
41CV†,42S,48GX,49G,DM42,DM41X,17BII,15CE,DM15L,12C,16CE |
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01-24-2014, 08:15 AM
Post: #29
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RE: [42S] MANT Challenge | |||
01-24-2014, 09:15 AM
Post: #30
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RE: [42S] MANT Challenge
(01-24-2014 06:16 AM)Werner Wrote: It sounds better in English than in German ;-) I know, that's why I should be working at the UN Interpretation Service :-) |
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