The C55x intrinsics are only supported on targets that support the __qadd, __qdbl, and __qsub intrinsics. Otherwise, no error message is generated, instead the compiler silently generates a call to a corresponding function __qadd, __qdbl, or __qsub.

#include <limits.h>
#include <stdint.h>
#include <c55x.h>       // include TI C55x intrinsics
__asm int32_t asm_lsadd(int32_t a, int32_t b)
{
    qadd r0, r0, r1
    bx lr}
int32_t foo(int32_t a, int32_t b)
{
    int32_t c, d, e;
    c = asm_lsadd(a, b);  // assembly language saturating add
    d = __qadd(a, b);     // ARM intrinsic saturating add
    e = _lsadd(a, b);     // TI C55x saturating add
    return c == d == e;   // returns 1
}