...just forwarding this to the list. Please respond at
http://www.piclist.com/techref/microchip/math/basic.htm
or CC
roger.froud@virgin.net

Seems like somebody must have done this before....

---
James Newton (PICList Admin #3)
mailto:jamesnewton@piclist.com 1-619-652-0593
PIC/PICList FAQ: http://www.piclist.com or .org

-----Original Message-----
From: James Newton [mailto:james@massmind.org]
Sent: Friday, July 10, 2893 15:44
To: James Newton
Subject: Your page H:\techref\microchip\math\basic.htm mod by
roger.froud@virgin.net 62.253.64.4


http://www.piclist.com/techref/microchip/math/basic.htm
62.253.64.4  mailto:roger.froud@virgin.net added 'Questions:

I need signed 16bit compare and branch macros for PIC16F877 working on
pseudo 16bit registers ACCaLO,ACCaHI like some Microchip application notes.
There are heaps of 16bit subtract/add routines but none set any useful
status bits that can be used to branch on the 8 possibilities (signed &
unsigned)
I have made a crude version of these using the status code boolean algebra
found in a Motorola 68000 data book and it appears to work ok. I was rather
hoping that someone (microchip)would have a thoroughly tested and more
elegant version of this. Maths routines are not my speciality & surely this
should be readily available. Doesn't anyone out there compare 2 signed
numbers then branch if one is greater than the other?
Any help ould be greatly appreciated. If anyone can improve on my code then
they are most welcome to have it.'

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