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slaisnan.f(3) | LAPACK | slaisnan.f(3) |
NAME¶
slaisnan.f -SYNOPSIS¶
Functions/Subroutines¶
logical function slaisnan (SIN1, SIN2)
Function/Subroutine Documentation¶
logical function slaisnan (realSIN1, realSIN2)¶
SLAISNAN tests input for NaN by comparing two arguments for inequality. Purpose:This routine is not for general use. It exists solely to avoid over-optimization in SISNAN. SLAISNAN checks for NaNs by comparing its two arguments for inequality. NaN is the only floating-point value where NaN != NaN returns .TRUE. To check for NaNs, pass the same variable as both arguments. A compiler must assume that the two arguments are not the same variable, and the test will not be optimized away. Interprocedural or whole-program optimization may delete this test. The ISNAN functions will be replaced by the correct Fortran 03 intrinsic once the intrinsic is widely available.
SIN1
Author:
SIN1 is REALSIN2
SIN2 is REAL Two numbers to compare for inequality.
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 75 of file slaisnan.f.
Author¶
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