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106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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//#include <_float.h>
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/*
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#include <math.h>
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*/
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#if 0
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unsigned char buf[32];
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unsigned char var_uchar;
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// float fp2;
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float fp1 = 42.0f;
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float fp2 = 23;
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float fp3 = 33.0;
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/*
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TODO:
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float-basic.c:
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fp3 = fp1 / 2.3f; // FIXME: division by zero
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fp3 = fp1 - 11.5f; // FIXME: Invalid operands for binary operator '-'
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float-conv.c:
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conversion from float variable to char variable does not work right
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float-cmp.c:
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many failing cases
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float-math.c:
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DONE:
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float-minimal.c
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float-misc.c:
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*/
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char *test(char *buffer, float f) {
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signed long intpart = (signed long)(f);
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float fracpart;
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float f1, f2;
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signed long n0;
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// printf("f:%f\n",f);
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f2 = intpart;
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// printf("f2:%f\n",f2);
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printf("f2:%08lx\n",*((unsigned long*)(&f2)));
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fracpart = f - f2;
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// printf("fracpart:%f\n",fracpart);
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printf("fracpart:%08lx\n",*((unsigned long*)(&fracpart)));
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// f1 = fracpart * 10000.0f;
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f1 = 10000.0f;
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printf("fracpart:%08lx\n",*((unsigned long*)(&f1)));
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// f1 *= fracpart;
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f1 = f1 * fracpart;
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// f1 = fracpart;
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// f1 = intpart;
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// printf("fracpart:%f\n",f1);
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printf("fracpart:%08lx\n",*((unsigned long*)(&f1)));
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n0 = (signed long)f1;
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printf("n0:%ld\n",n0);
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if (n0 >= 1000) {
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sprintf(buffer, "<0x%08lx:%ld.%ld>", *((unsigned long*)(&f)), intpart, n0);
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} else if (n0 >= 100) {
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sprintf(buffer, "<0x%08lx:%ld.0%ld>", *((unsigned long*)(&f)), intpart, n0);
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} else if (n0 >= 10) {
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sprintf(buffer, "<0x%08lx:%ld.00%ld>", *((unsigned long*)(&f)), intpart, n0);
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} else if (n0 >= 1) {
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sprintf(buffer, "<0x%08lx:%ld.000%ld>", *((unsigned long*)(&f)), intpart, n0);
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} else {
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sprintf(buffer, "<0x%08lx:%ld.0000%ld>", *((unsigned long*)(&f)), intpart, n0);
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}
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return &buffer[0];
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}
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#endif
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int test1(void)
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{
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float fp2 = 1.5f;
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if (1.5f == fp2) {
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return 1;
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}
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return 0;
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}
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// int test2(void)
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// {
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// float fp2 = 1.5f;
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// float fp1 = 1.6f;
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// if (fp2 >= fp1) {
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// return 0;
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// }
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// return 1;
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// }
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int main(void)
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{
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#if 0
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fp2 = 0.001f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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fp2 = 0.001234f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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fp2 = 0.01f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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fp2 = 0.01234f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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fp2 = 0.1234f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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fp2 = 1.234f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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fp2 = 12.34f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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fp2 = 123.4f; printf("fp2 0x%08lx %s\n", *((uint32_t*)&fp2), test(buf, fp2));
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#endif
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printf("test:%d\n", test1());
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// printf("test:%d\n", test2());
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// return 0;
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}
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