[Cfp-interest 2307] infinity and exceptions

[Fred J. Tydeman]

I wonder if we should change 5.2.4.2.2#4:

A quiet NaN propagates through almost
every arithmetic operation without raising a floating-point exception; a signaling NaN generally
raises a floating-point exception when occurring as an arithmetic operand.23)

to

Both infinity and a quiet NaN propagates through almost
every arithmetic operation without raising a floating-point exception; a signaling NaN generally
raises a floating-point exception when occurring as an arithmetic operand.23)

Reason:

I do not see any place in the C standard that the use of 
INFINITY shall be quiet (in most cases).  One exception is
INFINITY / INFINITY (which raises invalid)..


---
Fred J. Tydeman        Tydeman Consulting
tydeman at tybor.com      Testing, numerics, programming
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