HP 3000 Manuals HP 3000 Manuals
HPFPCONVERT (new) The HPFPCONVERT intrinsic converts data between MPE XL and MPE V/E binary floating-point formats. It accepts a source binary floating-point number and converts it to the equivalent destination binary floating-point number in the other MPE format. You must specify the format of the source and destination numbers. You have the option of specifying the rounding mode. The source number must be a floating-point number, not a constant. The conversion is performed by regarding the source number as infinitely precise and with unbounded range, and then rounding it to fit the designated destination format. Rounding is performed according to the formal rules for the rounding mode specified. Rounding methods and exception signaling are determined solely from the destination format and are independent of the source format. Conversion is performed as if all arithmetic traps are disabled. No trapping to user-supplied or system-supplied arithmetic trap routines is done. The status parameter, a 32-bit signed integer passed by reference is optional, but recommended. It indicates status in two fields. One reports the presence of errors and warnings, and the other indicates their source. If an error or warning condition is encountered, and you did not specify the status parameter, HPFPCONVERTcauses the calling process to abort. Using the status parameter in MPE XL is analogous to using condition codes in MPE V/E. The optional parameter exceptions, a 16-bit signed integer passed by reference, returns any exception conditions that occurred during conversion: none, inexact, underflow and overflow, and invalid operation (NaN).
NOTE HPFCONVERT is available only on MPE XL-based systems.