Floating point kit for PIC

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Floating point kit for PIC

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Author: Unknown

Floating point kit for PIC
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File name:	MATH.ZIP
Product homepage:	Unknown
Order page:	Unknown
Languages:
Platforms:	general
Release Date:	1 January, 1990
Licence Type:	Unknown
Size:	68 Kb
Price/fee (US$):	Unknown
Number of downloads:	5938

User Comments

Excellent - only one bug found, easily fixed
by mechie, Lincolnshire, UK, on Thursday Apr 15, 2004

Using FP32_12.A16 v1.12 originally on a PIC16F84 but now ported to 16F870 - needed extra memory (for my bloated application code)!, I found it easy to port and easy to understand - Very well commented !! There is a bug in the float -to- integer routine, INT32, if the de-biassed exponent is an integer multiple of 8 the routine does a 'RRF' 255 times, trashing the number to zero. The following snippet shows the 'simple fix' add 4 lines to beginning of SHIFT32 SHIFT32 MOVF EXP, W SUBLW 0 ; check for zero remaining BTFSC _Z GOTO SHIFT32OK ; if zero already BCF _C RRF ACC+B0 ; right shift by EXP RRF ACC+B1 RRF ACC+B2 DECFSZ EXP GOTO SHIFT32 SHIFT32OK BTFSC FPFLAGS,RND
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