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26 lines
671 B
26 lines
671 B
#include "test_I.h"
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int test_I_logcount (int iterations)
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{
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int error = 0;
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int i;
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// Check additivity.
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for (i = iterations; i > 0; i--) {
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cl_I a = testrandom_I();
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cl_I b = testrandom_I();
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if (a >= 0 && b >= 0)
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ASSERT2(logcount(a) == logcount(logand(a,b)) + logcount(logandc2(a,b)), a,b);
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}
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// Check behaviour on sign change.
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for (i = iterations; i > 0; i--) {
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cl_I a = testrandom_I();
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ASSERT1(logcount(lognot(a)) == logcount(a), a);
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}
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// Check shift invariance.
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for (i = iterations; i > 0; i--) {
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cl_I a = testrandom_I();
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sintL b = random32() % 1024;
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ASSERT2(logcount(ash(a,b)) == logcount(a) + (minusp(a) ? b : 0), a,b);
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}
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return error;
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}
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