User`s guide

Inline Assembly Language and Intrinsics
Intrinsic Functions
177Targeting MC56F83xx/DSP5685x Controllers
Example
long l1 = 0x41111111;
short s2 = 1;
long result;
result = L_shr_r(l1,s2);
// Expected value of result: 0x20888889
L_shrtNs
Arithmetic shift of 32-bit value by a specified shift amount.If the shift count is
positive, a right shift is performed. Otherwise, a left shift is performed. Saturation does
not occur during a left shift.
NOTE
Ignores upper N-5 bits of s_shftamount except the sign bit (MSB).
Prototype
Word32 L_shrtNs(Word32 lval2shft, Word16 s_shftamount)
Example
long result, l = 0x24680000;
short s2= 1;
result = L_shrtNs(l,s2);
// Expected value of result: 0x12340000
Modulo Addressing Intrinsic Functions
A modulo buffer is a buffer in which the data pointer loops back to the beginning of
the buffer once the pointer address value exceeds a specified limit.
Figure 7.1
depicts a modulo buffer with the limit six. Increasing the pointer address
value to 0x106 makes it point to the same data it would point to if its address value
were 0x100.