osf1 man page for read_rnd

Query: read_rnd

OS: osf1

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

write_rnd(3)						     Library Functions Manual						      write_rnd(3)

NAME
write_rnd, read_rnd - Sets and returns IEEE dynamic rounding mode for floating-point operations
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <float.h> unsigned int write_rnd( unsigned int rnd); unsigned int read_rnd();
DESCRIPTION
The write_rnd function sets the dynamic rounding mode in the floating-point control register (fpcr) for IEEE floating-point operations and returns the previous dynamic rounding mode. Dynamic rounding mode for IEEE floating-point operations is enabled for code generated by the C compiler by specifying -fprm d to cc(1), and by using the d floating-point instruction operator in assembly language code. Specify rnd as one of the following constants defined in float.h --------------------------------------------------- Constant Meaning --------------------------------------------------- FP_RND_RZ Round toward zero (chopped rounding) FP_RND_RN Round toward nearest (normal rounding) FP_RND_RP Round toward plus infinity FP_RND_RM Round toward minus infinity --------------------------------------------------- The read_rnd function returns the current dynamic rounding mode for floating-point operations.
RETURN VALUES
The write_rnd function returns the previous IEEE floating-point rounding mode. The read_rnd function returns the current IEEE floating- point rounding mode.
RELATED INFORMATION
Commands: cc(1). Files: float.h. Assembly Language Programmer's Guide. Alpha Architecture Reference Manual. IEEE Standard for Binary Floating-Point Arithmetic delim off write_rnd(3)
Related Man Pages
fegetround(3m) - hpux
fpsetround(3) - netbsd
fe_dec_getround(3m) - hpux
fpgetsticky(3) - netbsd
read_rnd(3) - osf1
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