JuliaLang/julia
Auf GitHub ansehenProposal: expose flags set by floating-point exceptions
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#2.976 geöffnet am 30. Apr. 2013
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Beschreibung
There is currently no Base function that allows users to check for the flags set by floating-point operations.1 This does not allow the user to compute in a fully IEEE-compatible manner and could decrease code legibility should the user be forced to test implicitly for a raised flag by inspecting the consequences of the computation.
This continues a discussion started in #2085, and extends the concept of overflow checking proposed for integers in #855.
- Detect the five flags raised by floating-point exceptions
- Invalid
- Division by zero
- Overflow
- Underflow
- Inexact
- Allow the floating-point rounding mode to be set:
- round to nearest, ties round to the nearest even digit in the required position
- round to nearest, ties round away from zero
- round up toward
Inf - round down toward
-Inf - round toward 0
[ ] Honor the difference between quiet and signaling NaNs- Expose similar flag-handling behavior from MPFR
cc: @andrioni @JeffBezanson