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+--- Thread: cr1 Float Comparison Type for RC bit; Ordered or Unordered? (/showthread.php?tid=1964)
cr1 Float Comparison Type for RC bit; Ordered or Unordered? - Vega - 05-24-2022
For a float instruction that simultaneously also updates cr1 (i.e. fadds. f0, f0, f1), is the float comparison Ordered or Unordered? Thanks in advance.
RE: cr1 Float Comparison Type for RC bit; Ordered or Unordered? - terorie - 05-25-2022
According to IBM docs,
> If the syntax form sets the Record (Rc) bit to 1, the instruction affects the Floating-Point Exception Summary (FX), Floating-Point Enabled Exception Summary (FEX), Floating-Point Invalid Operation Exception Summary (VX), and Floating-Point Overflow Exception (OX) bits in Condition Register Field 1.
I don't think it does any float comparison at all.
RE: cr1 Float Comparison Type for RC bit; Ordered or Unordered? - Vega - 05-25-2022
Thank you.