Marek Olšák
b42c6ff6f6
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com> Reviewed-by: Matt Turner <mattst88@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6987>
50 lines
951 B
C
50 lines
951 B
C
#include <stdlib.h>
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#include <stdio.h>
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#include <float.h>
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#include "util/u_math.h"
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#include "util/u_half.h"
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#include "util/u_cpu_detect.h"
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static void
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test(void)
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{
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unsigned i;
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unsigned roundtrip_fails = 0;
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for(i = 0; i < 1 << 16; ++i)
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{
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uint16_t h = (uint16_t) i;
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union fi f;
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uint16_t rh;
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f.f = _mesa_half_to_float(h);
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rh = _mesa_float_to_half(f.f);
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if (h != rh && !(util_is_half_nan(h) && util_is_half_nan(rh))) {
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printf("Roundtrip failed: %x -> %x = %f -> %x\n", h, f.ui, f.f, rh);
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++roundtrip_fails;
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}
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}
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if(roundtrip_fails) {
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printf("Failure! %u/65536 half floats failed a conversion to float and back.\n", roundtrip_fails);
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exit(1);
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}
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}
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int
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main(int argc, char **argv)
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{
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assert(!util_cpu_caps.has_f16c);
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test();
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/* Test f16c. */
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util_cpu_detect();
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if (util_cpu_caps.has_f16c)
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test();
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printf("Success!\n");
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return 0;
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}
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