float_sub_union.c
1.01 KB
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////C: '-msoft-fp-single'
//C: '-O3 -daiteq-fpu-type=none -msoft-float'
////A: '--has-fhalf'
#include <stdint.h>
typedef struct data_item {
unsigned opa;
unsigned opb;
unsigned reference;
} data_item_t;
data_item_t data[] = {
{0x8683F7FF, 0xC07F3FFF, 0xC07F3FFF},
{0x00000000, 0x3C072C85, 0x3C072C85},
{0x9EDE38F7, 0x3E7F7F7F, 0x3E7F7F7F},
{0xDF7EFFFF, 0x00000000, 0xDF7EFFFF},
{0x4F951295, 0x41E00002, 0x4F951295},
{0x00000000, 0x00000000, 0x00000000},
{0xC2800040, 0x4FFFDFF7, 0x4FFFDFF7},
{0x00000000, 0xBFFFFFCF, 0xBFFFFFCF},
{0x015E834A, 0xC700FFBF, 0xC700FFBF},
};
#define N (sizeof(data)/sizeof(data_item_t))
typedef half phalf __attribute__((ext_vector_type(2)));
union uf32 {
float f;
uint32_t u;
int32_t i;
half h[2];
phalf ph;
};
int main(void)
{
union uf32 a, b, z;
int r = 0;
for (unsigned i=0;i<N;++i) {
a.u = data[i].opa;
b.u = data[i].opb;
z.u = 0;
z.f = a.f - b.f;
if (z.u!=data[i].reference) r++;
}
return r;
}