39 lines
668 B
C
39 lines
668 B
C
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// gcc fl8test.c -O2 -o fl8test
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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union fu {
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float f;
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uint32_t u;
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};
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uint32_t until = 2048;
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uint32_t shift = 24;
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uint32_t groupcnt = 0;
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int main (int argc, char **argv) {
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if(argc > 1) {
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const char* arg = argv[1];
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until = atoi(arg);
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}
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if(argc > 2) {
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const char* arg = argv[2];
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shift = atoi(arg);
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}
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uint32_t prev = (uint32_t) -1;
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for(uint32_t i = 0; i < until; ++i) {
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union fu fui;
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fui.f = (float) i;
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fui.u = (fui.u >> shift);
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if(fui.u != prev) {
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printf("%d -> %d\n", i, fui.u);
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++groupcnt;
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}
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prev = fui.u;
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}
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printf("Until %d, there are %d groups!\n", until, groupcnt);
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}
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