45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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#include<stdio.h>
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#define BLOCKSIZE (8)
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int main(void)
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{
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int i = 0;
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int limit = 19; /* could be anything */
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int blocklimit;
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/* The limit may not be divisible by BLOCKSIZE,
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* go as near as we can first, then tidy up.
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*/
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blocklimit = (limit / BLOCKSIZE) * BLOCKSIZE;
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/* unroll the loop in blocks of 8 */
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while( i < blocklimit )
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{
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printf("process(%d)\n", i);
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printf("process(%d)\n", i+1);
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printf("process(%d)\n", i+2);
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printf("process(%d)\n", i+3);
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printf("process(%d)\n", i+4);
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printf("process(%d)\n", i+5);
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printf("process(%d)\n", i+6);
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printf("process(%d)\n", i+7);
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/* update the counter */
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i += 8;
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}
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if( i < limit )
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{
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/* Jump into the case at the place that will allow
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* us to finish off the appropriate number of items. */
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switch( limit - i )
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{
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case 7 : printf("process(%d)\n", i); i++;
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case 6 : printf("process(%d)\n", i); i++;
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case 5 : printf("process(%d)\n", i); i++;
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case 4 : printf("process(%d)\n", i); i++;
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case 3 : printf("process(%d)\n", i); i++;
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case 2 : printf("process(%d)\n", i); i++;
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case 1 : printf("process(%d)\n", i);
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}
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}
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}
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