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Update ps_res Comment For Clarity

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In all honesty it was written so badly that I had to remind even myself what it meant
This commit is contained in:
Nuh Uh 2025-11-25 16:40:08 -06:00
parent 65be70f123
commit e1ee80a70e
1 changed files with 4 additions and 3 deletions
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7
Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
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@ -152,9 +152,10 @@ void Interpreter::ps_res(Interpreter& interpreter, UGeckoInstruction inst)
const double a = ppc_state.ps[inst.FB].PS0AsDouble();
const double b = ppc_state.ps[inst.FB].PS1AsReciprocalDouble();
// The entire process of conditionally handling b doesn't matter
// for ps_res, because it never reads the bottom bits of a double
// when doing operations on a standard value (not 0, NaN, infinity)
// The entire process of conditionally truncating the mantissa bits of the b register
// isn't needed, because ps_res never reads those bottom mantissa bits anyways when
// doing the operation on a standard input (e.g. not NaN nor Infinity).
// That is to say, the operation is 32-bit, compared to rsqrte which is 64-bit.
if (a == 0.0 || b == 0.0)
{