mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 05:51:04 +00:00
116 lines
2.1 KiB
C
116 lines
2.1 KiB
C
|
|
#include <complex.h>
|
|
|
|
/* Single float has 23 bits of fraction. */
|
|
#define FRAC (1.0f / (1 << 20))
|
|
typedef float _Complex Type;
|
|
|
|
int close_enough (Type a, Type b)
|
|
{
|
|
Type diff = a - b;
|
|
float mag2_a = __real__(a) * __real__ (a) + __imag__ (a) * __imag__ (a);
|
|
float mag2_diff = (__real__(diff) * __real__ (diff)
|
|
+ __imag__ (diff) * __imag__ (diff));
|
|
|
|
return mag2_diff / mag2_a < (FRAC * FRAC);
|
|
}
|
|
|
|
#define N 100
|
|
|
|
static int __attribute__ ((noinline))
|
|
vector (Type ary[N], Type sum, Type prod)
|
|
{
|
|
Type tsum = 0, tprod = 1;
|
|
|
|
#pragma acc parallel vector_length(32) copyin(ary[0:N])
|
|
{
|
|
#pragma acc loop vector reduction(+:tsum) reduction (*:tprod)
|
|
for (int ix = 0; ix < N; ix++)
|
|
{
|
|
tsum += ary[ix];
|
|
tprod *= ary[ix];
|
|
}
|
|
}
|
|
|
|
if (!close_enough (sum, tsum))
|
|
return 1;
|
|
|
|
if (!close_enough (prod, tprod))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __attribute__ ((noinline))
|
|
worker (Type ary[N], Type sum, Type prod)
|
|
{
|
|
Type tsum = 0, tprod = 1;
|
|
|
|
#pragma acc parallel num_workers(32) copyin(ary[0:N])
|
|
{
|
|
#pragma acc loop worker reduction(+:tsum) reduction (*:tprod)
|
|
for (int ix = 0; ix < N; ix++)
|
|
{
|
|
tsum += ary[ix];
|
|
tprod *= ary[ix];
|
|
}
|
|
}
|
|
|
|
if (!close_enough (sum, tsum))
|
|
return 1;
|
|
|
|
if (!close_enough (prod, tprod))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __attribute__ ((noinline))
|
|
gang (Type ary[N], Type sum, Type prod)
|
|
{
|
|
Type tsum = 0, tprod = 1;
|
|
|
|
#pragma acc parallel num_gangs (32) copyin(ary[0:N])
|
|
{
|
|
#pragma acc loop gang reduction(+:tsum) reduction (*:tprod)
|
|
for (int ix = 0; ix < N; ix++)
|
|
{
|
|
tsum += ary[ix];
|
|
tprod *= ary[ix];
|
|
}
|
|
}
|
|
|
|
if (!close_enough (sum, tsum))
|
|
return 1;
|
|
|
|
if (!close_enough (prod, tprod))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main (void)
|
|
{
|
|
Type ary[N], sum = 0, prod = 1;
|
|
|
|
for (int ix = 0; ix < N; ix++)
|
|
{
|
|
float frac = ix * (1.0f / 1024) + 1.0f;
|
|
|
|
ary[ix] = frac + frac * 2.0i - 1.0i;
|
|
sum += ary[ix];
|
|
prod *= ary[ix];
|
|
}
|
|
|
|
if (vector (ary, sum, prod))
|
|
return 1;
|
|
|
|
if (worker (ary, sum, prod))
|
|
return 1;
|
|
|
|
if (gang (ary, sum, prod))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|