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Compiler-specific Features
• PLD, PLDW, and PLI on page 4-25 in the Assembler Guide.
4.7.22 __promise
This intrinsic promises the compiler that a given expression is nonzero. This enables the
compiler to perform more aggressive optimization when vectorizing code.
Syntax
void __promise(expr)
Where expr is an expression that evaluates to nonzero.
See also
• Using __promise to improve vectorization on page 3-17 in the Compiler User
Guide.
4.7.23 __qadd
This intrinsic inserts a QADD instruction or an equivalent code sequence into the
instruction stream generated by the compiler. It enables you to obtain the saturating add
of two integers from within your C or C++ code.
Syntax
int __qadd(int val1, int val2)
Where:
val1
val2
is the first summand of the saturating add operation
is the second summand of the saturating add operation.
Return value
The __qadd intrinsic returns the saturating add of val1 and val2.
See also
• __qdbl on page 4-93
• __qsub on page 4-93
• QADD, QSUB, QDADD, and QDSUB on page 4-94 in the Assembler Guide.
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