我有以下代码来查找最大值。
int length = 2000;
float *data;
// data is allocated and initialized
float max = 0.0;
for(int i = 0; i < length; i++)
{
if(data[i] > max)
{
max = data;
}
}
我尝试使用SSE3指令集对其进行向量化,但是我不知道如何进行比较。
int length = 2000;
float *data;
// data is allocated and initialized
float max = 0.0;
// for time being just assume that length is always mod 4
for(int i = 0; i < length; i+=4)
{
__m128 a = _mm_loadu_ps(data[i]);
__m128 b = _mm_load1_ps(max);
__m128 gt = _mm_cmpgt_ps(a,b);
// Kinda of struck on what to do next
}
有人能给出一些关于它的想法吗?