114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
#include <stdio.h>
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#include <math.h>
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/*
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* During the development of OpenGL on NT, we have had problems
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* with the compiler and floating point. Here are a few simple
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* sanity checks to make sure the compiler didn't regress.
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*/
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#define POW_TEST \
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/* pow(0,0) should be 1 not 0 */ \
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f = (float)pow(0.0, 0.0); \
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printf("pow(0.0, 0.0) is %f ", f); \
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if (f == 1.0F) { \
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printf("Correct\n"); \
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} else { \
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printf("ERROR\n"); \
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errorcount++; \
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}
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#define FLOOR_TEST \
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/* floor() would always return 0! */ \
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d = floor(8.123); \
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printf("floor(8.123) is %lf ", d); \
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if (d == 8.0) { \
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printf("Correct\n"); \
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} else { \
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printf("ERROR\n"); \
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errorcount++; \
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} \
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d = floor(63.5); \
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printf("floor(63.5) is %lf ", d); \
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if (d == 63.0) { \
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printf("Correct\n"); \
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} else { \
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printf("ERROR\n"); \
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errorcount++; \
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}
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int nointrin(void);
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int CastTest(void);
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main()
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{
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float f;
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double d;
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int errorcount = 0;
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f = (float)pow(0.0, 3.0);
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if (f != 0.0F) {
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printf("pow(0.0, 3.0) not 0.0! ERROR\n");
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errorcount++;
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} else {
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printf("pow(0.0, 3.0) is 0.0 Correct\n");
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}
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POW_TEST;
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FLOOR_TEST;
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errorcount += CastTest();
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errorcount += nointrin();
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if (errorcount)
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printf("%d errors in test\n", errorcount);
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else
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printf("\nAll tests passed\n");
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return errorcount;
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}
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int
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CastTest()
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{
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double dMaxUint;
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unsigned int uiResult;
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dMaxUint = 4294967295.0;
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uiResult = (unsigned int)dMaxUint;
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printf("uiResult(0x%08lX) = (unsigned int)dMaxUint(%lf) ",
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uiResult, dMaxUint);
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if (uiResult == 0xffffffff) {
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printf("Correct\n");
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return 0;
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} else {
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printf("ERROR\n");
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return 1;
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}
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}
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#pragma function (pow)
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#pragma function (floor)
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int
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nointrin()
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{
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float f;
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double d;
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int errorcount = 0;
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printf("\n\nNot using intrinsic functions for:\n");
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printf("pow()\n");
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printf("floor()\n");
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printf("\n");
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POW_TEST;
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FLOOR_TEST;
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return errorcount;
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}
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