RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler-specific Features
• BKPT on page 4-129 in the Assembler Guide
• SVC on page 4-130 in the Assembler Guide
• Appendix A Semihosting in the Developer Guide.
4.7.35 __sev
This intrinsic inserts a SEV instruction into the instruction stream generated by the
compiler.
Syntax
void __sev(void)
Errors
The compiler does not recognize the __sev intrinsic when compiling for a target that
does not support the SEV instruction. The compiler generates either a warning or an error
in this case.
See also
• __nop on page 4-78
• __wfe on page 4-94
• __wfi on page 4-94
• __yield on page 4-95
• NOP, SEV, WFE, WFI, and YIELD on page 4-139 in the Assembler Guide.
4.7.36 __sqrt
This intrinsic inserts a VFP VSQRT instruction into the instruction stream generated by
the compiler. It enables you to obtain the square root of a double-precision
floating-point value from within your C or C++ code.
Note
The __sqrt intrinsic is an analogue of the standard C library function sqrt. It differs
from the standard library function in that a call to __sqrt is guaranteed to be compiled
into a single, inline, machine instruction on an ARM architecture-based processor
equipped with a VFP coprocessor.
Syntax
double __sqrt(double val)
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