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46 .TH SCALBLN 3M "Jul 12, 2006" "SunOS 5.11" "Mathematical Library Functions"
48 scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl \- compute exponent using
53 c99 [ \fIflag\fR... ] \fIfile\fR... \fB-lm\fR [ \fIlibrary\fR... ]
56 \fBdouble\fR \fBscalbln\fR(\fBdouble\fR \fIx\fR, \fBlong\fR \fIn\fR);
61 \fBfloat\fR \fBscalblnf\fR(\fBfloat\fR \fIx\fR, \fBlong\fR \fIn\fR);
66 \fBlong double\fR \fBscalblnl\fR(\fBlong double\fR \fIx\fR, \fBlong\fR \fIn\fR);
71 \fBdouble\fR \fBscalbn\fR(\fBdouble\fR \fIx\fR, \fBint\fR \fIn\fR);
76 \fBfloat\fR \fBscalbnf\fR(\fBfloat\fR \fIx\fR, \fBint\fR \fIn\fR);
81 \fBlong double\fR \fBscalbnl\fR(\fBlong double\fR \fIx\fR, \fBint\fR \fIn\fR);
87 These functions compute \fIx\fR * \fBFLT_RADIX\fR^n efficiently, not normally
88 by computing \fBFLT_RADIX\fR^n explicitly.
92 Upon successful completion, these functions return \fIx\fR *
93 \fBFLT_RADIX\fR^\fIn\fR>.
96 If the result would cause overflow, a range error occurs and these functions
97 return \(+-\fBHUGE_VAL\fR, \(+-\fBHUGE_VALF\fR, and \(+-\fBHUGE_VALL\fR
98 (according to the sign of \fIx\fR) as appropriate for the return type of the
102 If \fIx\fR is NaN, a NaN is returned.
105 If \fIx\fR is \(+-0 or \(+-Inf, \fIx\fR is returned.
108 If \fIx\fR is 0, \fIx\fR is returned.
112 These functions will fail if:
121 The result overflows.
123 If the integer expression (\fBmath_errhandling\fR & \fBMATH_ERREXCEPT\fR) is
124 non-zero, then the overflow floating-point exception is raised.
130 An application wanting to check for exceptions should call
131 \fBfeclearexcept\fR(\fBFE_ALL_EXCEPT\fR) before calling these functions. On
132 return, if \fBfetestexcept\fR(\fBFE_INVALID\fR | \fBFE_DIVBYZERO\fR |
133 \fBFE_OVERFLOW\fR | \fBFE_UNDERFLOW\fR) is non-zero, an exception has been
134 raised. An application should either examine the return value or check the
135 floating point exception flags to detect exceptions.
139 See \fBattributes\fR(5) for descriptions of the following attributes:
148 ATTRIBUTE TYPE ATTRIBUTE VALUE
150 Interface Stability Standard
158 \fBfeclearexcept\fR(3M), \fBfetestexcept\fR(3M), \fBmath.h\fR(3HEAD),
159 \fBscalb\fR(3M), \fBattributes\fR(5), \fBstandards\fR(5)