SAS/C Library Changes in Release 7.50

Release 7.50 Enhancements to the SAS/C Library

SAS/C 7.50 has enhanced its support of floating-point in two ways. It has added support for IEEE (binary) floating-point arithmetic, and it has implemented new floating-point functions from the C99 standard. An overview of IEEE floating-point support can be found in Floating-Point Changes for SAS/C Release 7.50.

Floating-point support affects a number of different areas in the run-time library, which are documented in a number of sections of this chapter. Sections of this chapter relevant to floating-point processing are as follows:

Updates to Mathematical Functions gives an overview of using the mathematical library in release 7.50, including ways in which the processing of functions from previous releases has changed.
New Math Functions describes the mathematical functions that have been added to SAS/C for this release.
New nan, nanf, and nanl Functions describes new functions that can be used to generate IEEE NaNs (not a number) values.
Updates to the SIGFPE Signal describes changes to the processing of the SIGFPE signal to support IEEE and the C99 math library.
Update to float.h Header File lists the SAS/C 7.50 float.h header file, which has been enhanced to support IEEE floating-point.
Updates to the fprintf Function and Updates to the fscanf Function describe new format modifiers for the printf and scanf families of functions to allow a program to specify whether floating-point arguments are hexadecimnal or binary. These sections also describe changes and enhancements to the output of the printf family, and the valid input to the scanf family.
Updates to the strtod Function describes changes to the processing of strtod and related functions to support IEEE floating-point.
Updates to Function Categories gives information on how various library functions have changed due to IEEE support.
Updates to Signal-Handling Functions describes the new SIGBFPE signal, which has been added for errors occurring in IEEE computations.

64-Bit Support

SAS/C 7.50 supports programs which execute in the z/Architecture 64-bit addressing mode. An overview of this support can be found in 64-Bit Support.

64-bit support affects a number of different areas in the run-time library, which are documented in a number of sections of this chapter. Sections of this chapter relevant to floating-point processing are as follows:

New Multiple Heap Functions describes new functionality in heap management to support allocation of 64-bit addressable memory.
Huge Pointer Functions describes functions that have been enhanced to support 64-bit pointers.
Updates to the fprintf Function and Updates to the fscanf Function describe new format modifiers for the printf and scanf families of functions to allow a program to specify whether pointer arguments are 31-bit or 64-bit.
New Library Functions describes the IARV64 function, which allows 64-bit addressible memory to be allocated directly from the operating system.

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