RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler-specific Features
Where:
val
is a double-precision floating-point value.
Return value
The __sqrt intrinsic returns the square root of val as a double.
Errors
The compiler does not recognize the __sqrt intrinsic when compiling for a target that is
not equipped with a VFP coprocessor. The compiler generates either a warning or an
error in this case.
See also
• __sqrtf
• VABS, VNEG, and VSQRT on page 5-89 in the Assembler Guide.
4.7.37 __sqrtf
This intrinsic is a single-precision version of the __sqrtf intrinsic. It is functionally
equivalent to __sqrt, except that:
• it takes an argument of type float instead of an argument of type double
• it returns a float value instead of a double value.
See also
• __sqrt on page 4-87
• VABS, VNEG, and VSQRT on page 5-89 in the Assembler Guide.
4.7.38 __ssat
This intrinsic inserts an SSAT instruction into the instruction stream generated by the
compiler. It enables you to saturate a signed value from within your C or C++ code.
Syntax
int __ssat(int val, unsigned int sat)
Where:
val
sat
Is the value to be saturated.
Is the bit position to saturate to.
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