27 lines
829 B
Plaintext
27 lines
829 B
Plaintext
#include "../test_static.isph"
|
|
const int64 bit_size = 64;
|
|
const int64 a_bit_size = 3;
|
|
const int64 max_a = 7; // must be 2^a_bit_size-1
|
|
const int64 starts_with_one = 4; //must be 2^(a_bit_size-1)
|
|
|
|
const int64 max_shift = bit_size - a_bit_size;
|
|
|
|
static int64 calc_shift(int64 idx)
|
|
{
|
|
return (idx * (bit_size / programCount)) % (max_shift + 1);
|
|
}
|
|
|
|
task void f_f(uniform float RET[], uniform float aFOO[]) {
|
|
int64 a = aFOO[programIndex];
|
|
a = a % (max_a + 1);
|
|
// to make a = 0b1XX
|
|
a = a / starts_with_one == 0 ? starts_with_one : a;
|
|
// If a is just 1, compiler is smart enough to eliminate count_leading_zeros.
|
|
int64 i = a << calc_shift(programIndex);
|
|
RET[programIndex] = count_leading_zeros(i);
|
|
}
|
|
|
|
task void result(uniform float RET[]) {
|
|
RET[programIndex] = max_shift - calc_shift(programIndex);
|
|
}
|