mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2026-05-25 21:18:26 +02:00
a9618e7c42
In release builds, there should be no change, but in debug builds the assert will help us catch undefined behavior resulting from using util_cpu_caps before it is initialized. With fix for u_half_test for MSVC from Jesse Natalie squashed in. Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Marek Olšák <marek.olsak@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9266>
50 lines
1,010 B
C
50 lines
1,010 B
C
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <float.h>
|
|
|
|
#include "util/u_math.h"
|
|
#include "util/half_float.h"
|
|
#include "util/u_cpu_detect.h"
|
|
|
|
static void
|
|
test(void)
|
|
{
|
|
unsigned i;
|
|
unsigned roundtrip_fails = 0;
|
|
|
|
for(i = 0; i < 1 << 16; ++i)
|
|
{
|
|
uint16_t h = (uint16_t) i;
|
|
union fi f;
|
|
uint16_t rh;
|
|
|
|
f.f = _mesa_half_to_float(h);
|
|
rh = _mesa_float_to_half(f.f);
|
|
|
|
if (h != rh && !(util_is_half_nan(h) && util_is_half_nan(rh))) {
|
|
printf("Roundtrip failed: %x -> %x = %f -> %x\n", h, f.ui, f.f, rh);
|
|
++roundtrip_fails;
|
|
}
|
|
}
|
|
|
|
if(roundtrip_fails) {
|
|
printf("Failure! %u/65536 half floats failed a conversion to float and back.\n", roundtrip_fails);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
util_cpu_detect();
|
|
test();
|
|
|
|
/* Test non-f16c. */
|
|
if (util_get_cpu_caps()->has_f16c) {
|
|
((struct util_cpu_caps_t *)util_get_cpu_caps())->has_f16c = false;
|
|
test();
|
|
}
|
|
|
|
printf("Success!\n");
|
|
return 0;
|
|
}
|