petsc-3.14.5 2021-03-03
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# PetscIsNormalReal

Returns PETSC_TRUE if the input value satisfies isnormal()

### Synopsis

    #if defined(PETSC_USE_REAL___FLOAT128) || defined(PETSC_USE_REAL___FP16)
    PetscBool PetscIsNormalReal(PetscReal a)

### Input Parameter

| a | - the PetscReal Value

### Notes

uses the C99 standard isnormal() on systems where they exist. Uses isnormalq() with __float128 Otherwises always returns true

### Level

beginner

### Location

src/sys/utils/mathinf.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages