--- a/include/simd.h	Thu May 15 19:15:57 2008 +0200
+++ b/include/simd.h	Mon May 19 22:59:04 2008 +0200
@@ -72,11 +72,13 @@
 #define mShuffle3 _MM_SHUFFLE(3,3,3,3)
 #define mshuffle _mm_shuffle_ps
 
+/** select values from a and b according to mask (a if mask is 1, b if mask is 0) */
 inline const mfloat4 mselect(const mfloat4& mask, const mfloat4& a, const mfloat4& b)
 {
 	return _mm_or_ps(_mm_and_ps(mask, a), _mm_andnot_ps(mask, b));
 }
 
+/** fast power function */
 inline const mfloat4 mfastpow(const mfloat4& base, const mfloat4& exponent)
 {
     __m128 denom = _mm_mul_ps(exponent, base);