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future
Joined: 14 May 2004
Posts: 330
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| Does anyone have inline functions for 32/16,16/8,16*16,16*8? |
 Posted: Sat Jul 24, 2004 9:14 pm |
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I am looking for some routines to do these operations, plus any other you have.
I ask because I want speed in my code and dont know much asm.
the code I want to start with is..
(int16)A=208335*(int8)B/(int16)C;
The generated code is big with a lot of file register moves (that is what I want to avoid by using inline code).
Edited: A is 16bit.
Last edited by future on Sat Jul 24, 2004 11:57 pm; edited 1 time in total |
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Guest
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| Re: Does anyone have inline functions for 32/16,16/8,16*16,1 |
| Posted: Sat Jul 24, 2004 11:14 pm |
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| future wrote: | I am looking for some routines to do these operations, plus any other you have.
I ask because I want speed in my code and dont know much asm.
the code I want to start with is..
(int8)A=208335*(int8)B/(int16)C;
The generated code is big with a lot of file register moves (that is what I want to avoid by using inline code). |
First you cast is wrong.... ! The only value you have is already greater than int16 ! This will have to be int32, unless the end result is guaranteed to be int8 . |
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Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
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| Posted: Sun Jul 25, 2004 9:00 am |
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| Microchip has app notes with all the asm functions that you require. Do a search on their site for math routines. |
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