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Title: floating point in masm
Post by: darrenls59 on November 11, 2007, 05:42:57 PM

i need to divide/multiply by 1.8 in masm. Anyone know of a tried and tested method?

Thanks

Title: Re: floating point in masm
Post by: TNick on November 11, 2007, 06:11:51 PM

:)

I just know a way for 2.7:

.DATA
	Float1 	REAL4   10.7
	Floar2 	REAL4	2.7
	Float3	REAL4	1.0
.CODE
	finit
	fld		Float1
	fdiv		Floar2
	fstp		Float3
	FWAIT

Nick

PS Didn't tried and didn't tested. May be buggy!!! Use with extreme care! :)

Title: Re: floating point in masm
Post by: Tedd on November 11, 2007, 09:22:36 PM

FPU is one option..

Sticking to integers:

a * 1.8 = a * 9 / 5
a / 1.8 = a * 5 / 9

Although, depending what your numbers are, you might find better numbers for binary ops, e.g. shifts, to avoid mul and div.

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General Forums => The Workshop => Topic started by: darrenls59 on November 11, 2007, 05:42:57 PM