Inastemp: A Novel Intrinsics-as-Template Library for Portable SIMD-Vectorization

Table 2

Pseudocode to convert a branch-based scalar algorithm to a vectorized code using simple conditional methods. Here and can be functions or a complete scope of instructions computed before the merge.

Scalar	Using simple conditional methods
if( test )	res_A = A;
res = A();	res_B = B;
	res = IfElse( test, res_A, res_B );
else
res = B();	// or if A and B are functions
	res = IfElse( test, A(), B() );
if( test )	res_0 = IfTrue(test, A());
res_0 = A();	res_1 = IfFalse(test, B());
else
res_1 = B();
// then use res_0 and res_1