PCSX2 Documentation/Nightmare on Floating-Point Street: Difference between revisions

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Revision as of 23:43, 8 January 2015 (view source) Krysto (talk \| contribs) (Created page with "It is very hard to emulate the floating-point calculations of the R5900 FPU and the Vector Units on an x86 CPU because the Playstation 2 does not follow the IEEE standard. Mul...")		Revision as of 23:43, 8 January 2015 (view source) Krysto (talk \| contribs) No edit summary Newer edit →
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			''Originally written by ZeroFrog''

	It is very hard to emulate the floating-point calculations of the R5900 FPU and the Vector Units on an x86 CPU because the Playstation 2 does not follow the IEEE standard. Multiplying two numbers on the FPU, VU, and an x86 processor can give you 3 different results all differing by a couple of bits! Operations like square root and division are even more imprecise.		It is very hard to emulate the floating-point calculations of the R5900 FPU and the Vector Units on an x86 CPU because the Playstation 2 does not follow the IEEE standard. Multiplying two numbers on the FPU, VU, and an x86 processor can give you 3 different results all differing by a couple of bits! Operations like square root and division are even more imprecise.