RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler-specific Features
Inline optimization
If a function foo is inlined into a function bar then the value returned by
__return_address from within foo is the return address of bar.
Tail-call optimization
If a function foo is tail-called from a function bar then the value returned
by __return_address from within foo is the return address of bar.
See also
• __builtin_return_address on page 4-67
• __current_pc on page 4-70
• __current_sp on page 4-70
• Legacy inline assembler that accesses sp, lr, or pc on page 6-27 in the Compiler
User Guide.
4.7.32 __ror
This intrinsic inserts a ROR instruction or operand rotation into the instruction stream
generated by the compiler. It enables you to rotate a value right by a specified number
of places from within your C or C++ code.
Note
The compiler introduces ROR automatically when it recognizes certain expressions.
Syntax
unsigned int __ror(unsigned int val, unsigned int shift)
Where:
val is the value to be shifted right
shift is a constant shift in the range 1-31.
Return value
The __ror intrinsic returns the value of val rotated right by shift number of places.
See also
• ASR, LSL, LSR, ROR, and RRX on page 4-66 in the Assembler Guide.
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