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Title: Floating Point Register - stfs
Post by: Panda On Smack on May 18, 2009, 05:10:25 PM

Hey people

How would I go about loading a value into a float point register so i can create a C2 code?

I have this:

stfs f0,512(r3)

I would like to load the value of 0 in to f0 and not use the value 512 places on from r3

ta

Title: Re: Floating Point Register - stfs
Post by: Panda On Smack on May 18, 2009, 05:23:41 PM

yeah sorry, i realise that

I want to change the value held in f0 to 0 before calling: stfs f0,512(r3)

Title: Re: Floating Point Register - stfs
Post by: Panda On Smack on May 18, 2009, 05:57:43 PM

Thanks

Since posting I just changed:

stfs f0,512(r3)

to

stfs f31,512(r3)

as f31 is unused and always 0 so bit of a cheat but works for time being

Title: Re: Floating Point Register - stfs
Post by: Y.S. on May 19, 2009, 12:27:27 AM

You can also load 0 into f0 by the following;

Code Select

fsubs f0,f0,f0

When loading a value other than 0, a macro could be useful;

Code Select

.macro	lfsi	freg,symbol
lis	r12,\sumbol@h
ori	r12,r12,\symbol@l
stw	r12,-4(r1)
lfs	\freg,-4(r1)
.endm

Title: Re: Floating Point Register - stfs
Post by: Panda On Smack on May 19, 2009, 12:37:21 AM

Excellent, thanks

WiiRd forum

Wii & Gamecube Hacking => WiiRD Remote Debugger => Topic started by: Panda On Smack on May 18, 2009, 05:10:25 PM