Trailing-Edge
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PDP-10 Archives
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SRI_NIC_PERM_FS_1_19910112
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c/kcc5/tudiv.c
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/* This code tests unsigned integer division by generating and testing
** all of the possible optimizations and pathways
** for the code sequences that CCOUT's simuidiv() routine generates.
*/
main() {tudiv();}
tudiv()
{
static unsigned pos = 01000000, neg = -2, pvar = 0123, pv1 = 1;
printf("UIDIV results:\n\
pos is %o, neg is %o, pvar is %o.\n\
setz pos/0 = %o ? %o\n\
setz pos/1 = %o ? %o\n\
lsh pos/01000 = %o ? %o\n\
divi pos/01001 = %o ? %o\n\
div [] pos/1,,1 = %o ? %o\n\
case1 pos/pvar = %o ? %o\n\
case2 neg/pvar = %o ? %o\n\
case2.1 neg/[1] = %o ? %o\n\
case3 pos/[-1] = %o ? %o\n\
case4.1 neg/[-1] = %o ? %o\n\
case4.2 neg/neg = %o ? %o\n",
pos, neg, pvar,
pos/0, pos%0,
pos/1, pos%1,
pos/01000, pos%01000,
pos/01001, pos%01001,
pos/01000001, pos%01000001,
pos/pvar, pos%pvar, /* case 1 */
neg/pvar, neg%pvar, /* case 2 */
neg/pv1, neg%pv1, /* case 2.1 */
pos/(-1), pos%(-1), /* case 3 */
neg/(-1), neg%(-1), /* case 4.1 */
neg/neg, neg%neg /* case 4.2 */
);
}