| | | fmuladd |
+-----+-----+---------+
+The loop vectorizer knows about special instructions on the target and will
+vectorize a loop containing a function call that maps to the instructions. For
+example, the loop below will be vectorized on Intel x86 if the SSE4.1 roundps
+instruction is available.
+
+.. code-block:: c++
+
+ void foo(float *f) {
+ for (int i = 0; i != 1024; ++i)
+ f[i] = floorf(f[i]);
+ }
Partial unrolling during vectorization
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^