Last change
on this file since 1ae3ac46 was
7bef8cf,
checked in by Peter A. Buhr <pabuhr@…>, 18 months ago
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start paper on llheap
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Property mode set to
100644
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File size:
612 bytes
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1 | #include <stdio.h> |
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2 | |
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3 | #define FibCtor { 0, 0, NULL } |
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4 | typedef struct { |
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5 | int fn1, fn2; |
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6 | void * next; |
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7 | } Fib; |
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8 | |
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9 | int fib( Fib * f ) { |
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10 | if ( __builtin_expect(f->next != 0, 1) ) goto *f->next; |
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11 | s1: |
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12 | f->fn1 = 0; |
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13 | f->next = &&s2; |
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14 | return f->fn1; |
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15 | s2: |
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16 | f->fn2 = f->fn1; |
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17 | f->fn1 = 1; |
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18 | f->next = &&s3; |
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19 | return f->fn1; |
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20 | s3:; |
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21 | int fn = f->fn1 + f->fn2; |
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22 | f->fn2 = f->fn1; |
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23 | f->fn1 = fn; |
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24 | return fn; |
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25 | } |
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26 | int main() { |
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27 | Fib f1 = FibCtor, f2 = FibCtor; |
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28 | for ( int i = 0; i < 10; i += 1 ) { |
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29 | printf( "%d %d\n", fib( &f1 ), fib( &f2 ) ); |
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30 | } |
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31 | } |
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32 | |
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33 | // Local Variables: // |
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34 | // tab-width: 4 // |
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35 | // compile-command: "gcc-8 Fib1.c" // |
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36 | // End: // |
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