Dispatch to a floating-point function
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VSupported on OpenVMS
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xcall FXSUBR(routine, arguments[, ...])
Arguments
routine
The address of the OpenVMS floating-point function to call. (n)
arguments
The arguments to the specified routine, passed using the same method as to that routine.
Discussion
This function enables Synergy code to dispatch to a native OpenVMS floating-point function, saving the return value for later retrieval. This is the only way to enable retrieval of any floating-point result on Alpha and I64.
To capture the result from a floating-point function called through FXSUBR, use the %FSTAT intrinsic function or the FSTAT subroutine. See %FSTAT and FSTAT.
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FXSUBR does not work on the MATH$ routines (or on any other routine that passes floating-point arguments by value) on either the Alpha or the I64. In addition, on the I64, the return value can only be an F or G floating-point value. An IEEE floating-point value will not be retrieved correctly. |
